2001 Providence, Rhode Island (PVD)

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2001 PROVIDENCE, RHODE ISLAND (PVD)

The proximity to Narragansett Bay and the Atlantic Ocean plays an important part in determining the climate for Providence and vicinity. In winter, the temperatures are modified considerably, and many major snowstorms change to rain before reaching the area. In summer, many days that could be uncomfortably warm are cooled by refreshing sea breezes. At other times of the year, sea fog may be advected in over land by onshore winds. In fact, most cases of dense fog are produced this way, but the number of such days is few, averaging two or three days per month. In early fall, severe coastal storms of tropical origin sometimes bring destructive winds to this area. Even at other times of the year, it is usually coastal storms which produce the severest weather.

The temperature for the entire year averages around 50 degrees with 70 degree temperatures common from near the end of May to the latter part of September. During this period, there may be several days reaching 90 degrees or more. Temperatures of 100 degrees and more are rare.

Freezing temperatures occur on the average about 125 days per year. They become a common daily occurrence in the latter part of November, and become less frequent near the end of March. The average date for the last freeze in spring is mid–April, while the average date for the first freeze in fall is late October, making the growing season about 195 days in length. Sub–zero weather in winter seldom occurs, averaging less than one day for December and one or two days each for January and February.

Measurable precipitation occurs on about one day out of every three, and is fairly evenly distributed throughout the year. There is usually no definite dry season, but occasionally droughts do occur.

Thunderstorms are responsible for much of the rainfall from May through August. They usually produce heavy, and sometimes even excessive amounts of rainfall. However, since their duration is relatively short, damage is ordinarily light. The thunderstorms of summer are frequently accompanied by extremely gusty winds, which may result in some damage to property.

The first measurable snowfall of winter usually comes toward the end of November, and the last in spring is about the middle of March. Winters with over 50 inches of snow are not common. The area normally receives less than 25 inches. The month of greatest snowfall is usually February, but January and March are close seconds. It is unusual for the ground to remain well covered with snow for any long period of time.

NORMALS, MEANS, AND EXTREMES

PROVIDENCE, RI (PVD)

LATITUDE: LONGITUDE: ELEVATION (FT): TIME ZONE: WBAN: 14765

41 43′ 19″ N  71 25′ 57″ W  GRND:  50  BARO:  53  EASTERN (UTC + 5)

ELEMENTPORJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR
TEMPERATURE FNORMAL DAILY MAXIMUM3036.638.346.157.067.376.982.180.774.364.153.041.259.8
MEAN DAILY MAXIMUM5437.038.846.357.767.977.080.780.673.363.552.541.359.7
HIGHEST DAILY MAXIMUM48697285989597102104100867877104
YEAR OF OCCURRENCE199519851998197619961988199119751983197919931998AUG 1975
MEAN OF EXTREME MAXS.5456.156.266.778.185.891.192.191.587.179.469.560.476.2
NORMAL DAILY MINIMUM3019.120.928.837.747.356.863.261.953.843.034.924.441.0
MEAN DAILY MINIMUM5420.522.129.438.748.057.462.462.254.143.435.225.141.5
LOWEST DAILY MINIMUM48–13–7114294104033206–10–13
YEAR OF OCCURRENCE197619791967195419561980199619651980197619891980JAN 1976
MEAN OF EXTREME MINS.542.34.314.027.236.646.252.550.439.229.420.97.427.5
NORMAL DRY BULB3027.929.737.447.457.366.972.771.364.153.644.032.850.4
MEAN DRY BULB5428.630.437.848.257.967.371.571.463.753.443.833.250.6
MEAN WET BULB1726.528.533.942.752.561.662.962.258.849.140.031.245.8
MEAN DEW POINT1718.720.225.934.946.557.059.162.254.943.633.724.140.1
NORMAL NO. DAYS WITH:
MAXIMUM 90300.00.00.00.10.51.83.62.10.90.00.00.09.0
MAXIMUM 323011.67.71.4*0.00.00.00.00.00.00.26.827.7
MINIMUM 323028.024.219.65.70.20.00.00.00.03.612.725.1119.1
MINIMUM 0301.40.70.00.00.00.00.00.00.00.00.00.42.5
H/CNORMAL HEATING DEG. DAYS3011509888565282463108903596309985884
NORMAL COOLING DEG. DAYS30000078823920363600606
RHNORMAL (PERCENT)3064636361677071727370696768
HOUR 01 LST3069687071788283848480757276
HOUR 07 LST3070707169737678808280777475
HOUR 13 LST3056545248535656565653575855
HOUR 19 LST3063626159646768717371696666
sPERCENT POSSIBLE SUNSHINE4256585857586163626261505258
W/OMEAN NO. DAYS WITH:
HEAVY FOG(VISBY 1/4 MI)492.12.22.12.12.12.51.91.51.72.72.12.025.0
THUNDERSTORMS490.20.30.81.32.73.64.23.51.81.00.90.220.5
CLOUDINESSMEAN:
SUNRISE–SUNSET (OKTAS)425.05.05.35.35.45.15.04.84.64.35.04.95.0
MIDNIGHT–MIDNIGHT (OKTAS)314.64.54.74.85.04.94.94.64.54.24.84.74.7
MEAN NO. DAYS WITH:
CLEAR429.58.08.47.36.56.66.78.49.411.08.38.398.4
PARTLY CLOUDY426.87.17.78.29.910.311.910.38.17.96.97.8102.9
CLOUDY4214.713.214.914.514.613.112.412.312.412.114.914.9164.0
PRMEAN STATION PRESSURE(IN)2929.9729.9629.9329.8929.9129.8929.9129.9730.0030.0129.9929.9829.95
MEAN SEA–LEVEL PRES. (IN)1730.0630.0430.0129.9729.9730.0129.9930.0230.0730.0930.0730.0530.03
WINDSMEAN SPEED (MPH)4510.711.311.911.610.49.89.39.09.29.310.110.310.2
PREVAIL. DIR (TENS OF DEGS)2930303016161822232236303030
MAXIMUM 2–MINUTE:
SPEED (MPH)641414640383839283440384146
DIR. (TENS OF DEGS)20302903223601010206202729
YEAR OF OCCURRENCE199619961997199720001997199619991996199619982000MAR 1997
MAXIMUM 5–SECOND:
SPEED (MPH)656545951485151374447535359
DIR. (TENS OF DEGS)21202803243601011805202628
YEAR OF OCCURRENCE199720001997199720001997199619991999199619982000MAR 1997
PRECIPITATIONNORMAL (IN)303.883.614.054.113.763.333.183.633.483.694.434.3845.53
MAXIMUM MONTHLY (IN)4811.667.208.8412.748.3811.088.0811.127.9211.8911.0110.7512.74
YEAR OF OCCURRENCE197919841983198319841982197619551961196219831969APR 1983
MINIMUM MONTHLY (IN)480.500.390.561.480.710.170.820.710.770.400.410.580.17
YEAR OF OCCURRENCE197019871981196619641999199919841959199420011955JUN 1999
MAXIMUM IN 24 HOURS (IN)483.343.144.534.455.175.034.836.714.896.634.183.856.71
YEAR OF OCCURRENCE196219781968198319841984197619791961196219831969AUG 1979
NORMAL NO. DAYS WITH:
PRECIPITATION 0.013010.89.811.410.711.410.78.69.48.18.510.712.2122.3
PRECIPITATION 1.00301.10.91.21.21.00.80.90.80.91.01.31.212.3
SNOWFALLNORMAL (IN)3010.010.76.00.70.*0.00.00.00.00.21.27.236.0
MAXIMUM MONTHLY (IN)4737.230.931.67.67.00.00.00.00.02.58.019.837.2
YEAR OF OCCURRENCE19961962195619821977197919891963JAN 1996
MAXIMUM IN 24 HOURS (IN)4720.827.616.97.67.00.00.00.00.02.58.011.927.6
YEAR OF OCCURRENCE19961978196019821977197919891981FEB 1978
MAXIMUM SNOW DEPTH (IN)521930201020000171230
YEAR OF OCCURRENCE19481961195619701977197919891981FEB 1961
NORMAL NO. DAYS WITH:
SNOWFALL 1.0302.82.61.70.20.00.00.00.00.00.10.42.210.0
PRECIPITATION (inches) 2001 PROVIDENCE, RI (PVD)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
19721.855.196.703.715.736.834.252.987.314.368.457.7065.06
19733.063.552.787.163.993.482.925.173.043.172.297.6348.24
19744.453.044.512.862.743.281.643.106.152.791.564.5440.66
19756.783.293.072.992.064.733.512.196.154.666.295.1150.83
19766.382.913.442.002.531.608.087.011.576.520.813.4746.32
19773.902.875.623.353.433.922.042.125.606.903.245.8548.84
19789.013.203.102.535.271.972.636.461.823.222.615.1947.01
197911.664.082.215.127.621.441.6510.094.083.944.491.8158.19
19801.401.168.116.181.783.852.031.990.903.413.731.5736.11
19810.774.790.564.101.922.313.752.652.583.383.206.3636.37
19826.093.083.763.641.6111.083.513.673.613.084.321.8149.26
19834.324.818.8412.744.671.912.142.712.164.5011.017.7167.52
19842.007.205.774.308.384.095.160.711.774.251.953.1648.74
19851.181.573.081.654.764.702.888.571.691.787.141.4240.42
19865.883.182.862.102.293.275.953.290.972.485.778.0946.13
19874.730.395.626.911.802.001.202.587.472.283.402.2940.67
19882.695.294.093.112.830.915.730.942.381.777.601.0338.37
19891.172.694.135.306.075.845.596.144.758.374.351.6656.06
19905.012.932.015.575.701.133.523.742.284.962.455.4844.78
19913.442.316.614.803.300.932.765.985.092.654.653.1745.69
19924.822.104.042.341.424.613.596.065.091.535.056.8347.48
19932.425.066.995.021.121.402.181.234.083.553.355.7642.16
19945.532.107.192.072.982.701.346.344.120.405.344.5844.69
19953.673.142.033.342.832.891.171.804.066.374.762.1838.24
19965.022.192.714.882.442.175.572.195.726.202.386.5948.06
19974.271.894.683.252.682.230.966.320.991.806.062.8437.97
19986.555.855.864.916.059.611.372.392.303.782.761.2752.70
19996.705.453.331.544.250.170.823.257.004.512.852.3942.26
20004.192.745.375.063.724.783.642.413.791.314.734.2646.00
20012.401.968.782.043.966.721.924.504.400.640.412.4640.19
POR=97 YRS3.833.303.973.733.293.103.073.703.363.203.763.7842.09
AVERAGE TEMPERATURE (F) 2001 PROVIDENCE, RI (PVD)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
197230.828.036.444.357.764.972.670.665.149.640.934.349.6
197331.129.643.750.056.770.373.675.063.454.243.838.352.5
197431.629.038.750.655.665.372.672.663.248.243.735.750.6
197534.130.435.544.561.466.074.371.461.055.348.032.151.2
197623.535.539.052.658.070.070.070.061.648.737.925.449.4
197720.929.843.650.661.266.774.373.064.152.945.931.651.2
197825.122.133.846.757.868.071.771.359.551.542.333.448.6
197930.019.740.446.860.365.173.570.264.053.048.337.350.7
198029.726.837.149.560.364.574.873.464.949.841.028.550.0
198120.337.438.751.458.569.475.670.062.449.143.031.150.6
198221.531.538.847.858.963.973.669.264.153.247.538.650.7
198331.432.940.449.956.970.276.674.369.655.346.032.553.0
198426.437.133.847.657.469.171.573.562.156.343.637.951.4
198522.532.140.851.060.264.873.071.165.254.645.930.451.0
198631.129.039.949.459.466.471.069.362.353.041.635.450.7
198729.028.639.848.459.368.472.269.664.351.443.035.150.8
198826.831.839.447.058.066.974.375.363.048.945.232.450.8
198933.829.937.546.259.368.772.372.165.354.142.521.850.3
199036.334.340.148.156.067.773.073.563.758.646.539.553.1
199129.635.141.351.863.969.374.273.663.156.145.436.353.3
199231.433.036.646.557.667.370.370.164.051.743.034.250.5
199331.426.335.849.661.869.374.573.865.151.544.033.751.4
199422.725.838.851.456.569.476.269.963.054.248.538.451.2
199536.029.441.248.457.368.375.873.562.857.040.729.851.7
199628.729.635.048.357.468.171.064.152.140.038.6
199729.336.537.847.155.468.173.770.664.051.841.034.250.8
199835.137.041.249.861.166.073.573.366.354.143.538.553.3
199930.234.839.950.059.870.576.672.066.552.447.436.853.1
200027.734.043.547.358.567.870.570.263.453.443.428.950.7
200129.031.936.349.160.170.569.974.364.954.247.639.352.3
POR=97 YRS29.129.837.947.858.167.172.171.163.853.743.533.050.6

REFERENCE NOTES:

PAGE 1:

THE TEMPERATURE GRAPH SHOWS NORMAL MAXIMUM AND NORMAL MINIMUM DAILY TEMPERATURES (SOLID CURVES) AND THE ACTUAL DAILY HIGH AND LOW TEMPERATURES (VERTICAL BARS).

PAGE 2 AND 3:

H/C INDICATES HEATING AND COOLING DEGREE DAYS.

RH INDICATES RELATIVE HUMIDITY

W/O INDICATES WEATHER AND OBSTRUCTIONS

S INDICATES SUNSHINE.

PR INDICATES PRESSURE.

CLOUDINESS ON PAGE 3 IS THE SUM OF THE CEILOMETER AND SATELLITE DATA NOT TO EXCEED EIGHT EIGHTHS (OKTAS).

GENERAL:

T INDICATES TRACE PRECIPITATION, AN AMOUNT GREATER THAN ZERO BUT LESS THAN THE LOWEST REPORTABLE VALUE.

+ INDICATES THE VALUE ALSO OCCURS ON EARLIER DATES.

BLANK ENTRIES DENOTE MISSING OR UNREPORTED DATA.

NORMALS ARE 30–YEAR AVERAGES (1961–1990).

ASOS INDICATES AUTOMATED SURFACE OBSERVING SYSTEM.

PM INDICATES THE LAST DAY OF THE PREVIOUS MONTH.

POR (PERIOD OF RECORD) BEGINS WITH THE JANUARY DATA MONTH AND IS THE NUMBER OF YEARS USED TO COMPUTE THE MEAN. INDIVIDUAL MONTHS WITHIN THE POR MAY BE MISSING.

WHEN THE POR FOR A NORMAL IS LESS THAN 30 YEARS, THE NORMAL IS PROVISIONAL AND IS BASED ON THE NUMBER OF YEARS INDICATED.

0.* OR * INDICATES THE VALUE OR MEAN–DAYS–WITH IS BETWEEN 0.00 AND 0.05.

CLOUDINESS FOR ASOS STATIONS DIFFERS FROM THE NON–ASOS OBSERVATION TAKEN BY A HUMAN OBSERVER. ASOS STATION CLOUDINESS IS BASED ON TIME–AVERAGED CEILOMETER DATA FOR CLOUDS AT OR BELOW 12,000 FEET AND ON SATELLITE DATA FOR CLOUDS ABOVE 12,000 FEET.

THE NUMBER OF DAYS WITH CLEAR, PARTLY CLOUDY, AND CLOUDY CONDITIONS FOR ASOS STATIONS IS THE SUM OF THE CEILOMETER AND SATELLITE DATA FOR THE SUNRISE TO SUNSET PERIOD.

GENERAL CONTINUED:

CLEAR INDICATES 0–2 OKTAS, PARTLY CLOUDY INDICATES 3–6 OKTAS, AND CLOUDY INDICATES 7 OR 8 OKTAS. WHEN AT LEAST ONE OF THE ELEMENTS (CEILOMETER OR SATELLITE) IS MISSING, THE DAILY CLOUDINESS IS NOT COMPUTED.

WIND DIRECTION IS RECORDED IN TENS OF DEGREES (2 DIGITS) CLOCKWISE FROM TRUE NORTH. "00" INDICATES CALM. "36" INDICATES TRUE NORTH.

RESULTANT WIND IS THE VECTOR AVERAGE OF THE SPEED AND DIRECTION.

AVERAGE TEMPERATURE IS THE SUM OF THE MEAN DAILY MAXIMUM AND MINIMUM TEMPERATURE DIVIDED BY 2.

SNOWFALL DATA COMPRISE ALL FORMS OF FROZEN PRECIPITATION, INCLUDING HAIL.

A HEATING (COOLING) DEGREE DAY IS THE DIFFERENCE BETWEEN THE AVERAGE DAILY TEMPERATURE AND 65 F.

DRY BULB IS THE TEMPERATURE OF THE AMBIENT AIR.

DEW POINT IS THE TEMPERATURE TO WHICH THE AIR MUST BE COOLED TO ACHIEVE 100 PERCENT RELATIVE HUMIDITY.

WET BULB IS THE TEMPERATURE THE AIR WOULD HAVE IF THE MOISTURE CONTENT WAS INCREASED TO 100 PERCENT RELATIVE HUMIDITY.

ON JULY 1, 1996, THE NATIONAL WEATHER SERVICE BEGAN USING THE "METAR" OBSERVATION CODE THAT WAS ALREADY EMPLOYED BY MOST OTHER NATIONS OF THE WORLD. THE MOST NOTICEABLE DIFFERENCE IN THIS ANNUAL PUBLICATION WILL BE THE CHANGE IN UNITS FROM TENTHS TO EIGHTS (OKTAS) FOR REPORTING THE AMOUNT OF SKY COVER.

HEATING DEGREE DAYS (base 65 F) 2001 PROVIDENCE, RI (PVD)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-73810644737179451044984653451268165633
1973-742312533163281910281003808433313625559
1974-7500114512634899951962907606160645809
1975-7601313229850610131283850798403223395558
1976-7722312450180612191361983653434176516333
1977-7806103368568103012311192964542238266268
1978-798818041267397010751261755540162526096
1979-8011259438049684910881104857459158935614
1980-810112046571511251379769808405228136028
1981-8202011948665110441343932802510190916188
1982-83126783635188091038892755449254135196
1983-84046232356310011190802961513236365691
1984-85101252706378321309914743417177635488
1985-86067832156710651045999772460216575586
1986-87142511338069791111111014772494228235782
1987-88225704146539211177954787532238675840
1988-89810894915871003960975847557181225730
1989-9029893326681329882854761511275245736
1990-91601072425497811090829726400121294880
1991-92101252755818841034919876549246275517
1992-9311410040465295110361077901455118325741
1993-941010241362396613071092805401263175990
1994-950585326487815892990731493244225090
1995-9600111245721108211161018921494265185991
1996-9704833897438141098794836529289775656
1997-983283410713948919776738451149615253
1998-9900453296368161072837773441172145135
1999-0015433845198661148892659524219595319
2000-012712035564211151111922883473193155838
2001-3072334515790
COOLING DEGREE DAYS (base 65 F) 2001 PROVIDENCE, RI (PVD)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
1972000176024819076100583
197300081718127231884300883
19740007277924224466010666
197500005510030021816410694
1976000401319616318333300631
197700056810829526085000821
197800002512622421124000610
197900002659279190741200640
198000002184312272122000811
198100023315233518347000752
19820000116427616559320580
19830001817736729820630001087
19840000616420627247700702
19850005346525620390500658
1986000051105207164381400579
198700005713023117753000648
198800002613130233637200834
1989000010141237237103000728
199000081114262272744920782
1991000129616629527673800926
199200002710318316975100558
1993000026167303281110110889
19940000715535216330000707
199500001212834427253400813
199600033611720065000
199700000177281184631000715
19980080369627026693000769
199900001818536622996000894
200000002714717917377100604
2001000148190161293741000777
SNOWFALL (inches) 2001 PROVIDENCE, RI (PVD)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-730.00.00.00.70.34.12.03.20.60.40.00.011.3
1973-740.00.00.00.0TT15.111.10.41.30.00.027.9
1974-750.00.00.00.00.32.12.018.22.20.20.00.025.0
1975-760.00.00.0T1.27.515.63.79.50.00.00.037.5
1976-770.00.00.00.0T9.814.011.44.4T7.00.046.6
1977-780.00.00.00.01.33.920.528.615.9T0.00.070.2
1978-790.00.00.00.02.32.46.05.5T1.10.00.017.3
1979-800.00.00.02.50.0T0.63.85.30.00.00.012.2
1980-810.00.00.00.04.13.612.90.60.30.00.00.021.5
1981-820.00.00.0TT16.413.44.35.77.60.00.047.4
1982-830.00.00.00.00.07.33.821.3TT0.00.032.4
1983-840.00.00.00.0T4.517.9T13.7T0.00.036.1
1984-850.00.00.00.0T2.09.810.00.6T0.00.022.4
1985-860.00.00.00.01.82.60.713.00.5TT0.018.6
1986-870.00.00.00.04.48.021.54.71.61.10.00.041.3
1987-880.00.00.00.08.07.813.56.72.7T0.00.038.7
1988-890.00.00.00.0T1.20.27.31.90.30.00.010.9
1989-900.00.00.00.08.015.810.810.59.31.80.00.056.2
1990-910.00.00.00.0T6.96.46.05.30.00.00.024.6
1991-920.00.00.00.0T4.82.44.98.22.00.00.022.3
1992-930.00.00.0TT3.65.412.717.80.20.00.039.7
1993-940.00.00.00.0T10.118.025.89.60.0T0.063.5
1994-950.00.00.00.00.70.33.08.4T0.10.00.012.5
1995-960.00.00.00.04.037.2
1996-97
1997-980.21.60.10.3T
1998-996.512.812.2T
1999-006.96.82.6
2000-019.710.810.3T0.00.0
2001-0.00.00.00.00.01.5
POR=43 YRS0.00.00.00.11.16.79.69.77.30.70.20.035.4

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