2001 Tampa, Florida (TPA)

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2001 TAMPA, FLORIDA (TPA)

Tampa is on west central coast of the Florida Peninsula. Very near the Gulf of Mexico at the upper end of Tampa Bay, land and sea breezes modify the subtropical climate. Major rivers flowing into the area are the Hillsborough, the Alafia, and the Little Manatee.

Winters are mild. Summers are long, rather warm, and humid. Low temperatures are about 50 degrees in the winter and 70 degrees during the summer. Afternoon highs range from the low 70s in the winter to around 90 degrees from June through September. Invasions of cold northern air produce an occasional cool winter morning. Freezing temperatures occur on one or two mornings per year during December, January, and February. In some years no freezing temperatures occur. Temperatures rarely fail to recover to the 60s on the cooler winter days. Temperatures above the low 90s are uncommon because of the afternoon sea breezes and thunderstorms. An outstanding feature of the Tampa climate is the summer thunderstorm season. Most of the thunderstorms occur in the late afternoon hours from June through September. The resulting sudden drop in temperature from about 90 degrees to around 70 degrees makes for a pleasant change. Between a dry spring and a dry fall, some 30 inches of rain, about 60 percent of the annual total, falls during the summer months. Snowfall is very rare. Measurable snows under 1/2 inch have occurred only a few times in the last one hundred years.

A large part of the generally flat sandy land near the coast has an elevation of under 15 feet above sea level. This does make the area vulnerable to tidal surges. Tropical storms threaten the area on a few occasions most years. The greatest risk of hurricanes has been during the months of June and October. Many hurricanes, by replenishing the soil moisture and raising the water table, do far more good than harm. The heaviest rains in a 24–hour period, around 12 inches, have been associated with hurricanes.

Fittingly named the Suncoast, the sun shines more than 65 percent of the possible, with the sunniest months being April and May. Afternoon humidities are usually 60 percent or higher in the summer months, but range from 50 to 60 percent the remainder of the year.

Night ground fogs occur frequently during the cooler winter months. Prevailing winds are easterly, but westerly afternoon and early evening sea breezes occur most months of the year. Winds in excess of 25 mph are not common and usually occur only with thunderstorms or tropical disturbances.

Based on the 1951–1980 period, the average first occurrence of 32 degrees Fahrenheit in the fall is December 26 and the average last occurrence in the spring is February 3.

NORMALS, MEANS, AND EXTREMES

TAMPA, FL (TPA)

LATITUDE:    LONGITUDE:    ELEVATION (FT):    TIME ZONE:    WBAN: 12842

27 57′ 41″ N  82 32′25″W  GRND:  8  BARO:  40  EASTERN (UTC + 5)

ELEMENTPORJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR
TEMPERATURE FNORMAL DAILY MAXIMUM3069.871.476.681.787.289.590.290.289.084.377.772.181.6
MEAN DAILY MAXIMUM5470.572.376.481.787.489.990.390.489.084.077.572.281.8
HIGHEST DAILY MAXIMUM5586889193989997989694908699
YEAR OF OCCURRENCE199119711949197519751985199519751991199019711994JUN 1985
MEAN OF EXTREME MAXS.5480.682.385.288.793.094.794.694.493.490.385.282.188.7
NORMAL DAILY MINIMUM3050.051.656.560.867.572.974.574.572.865.257.252.363.0
MEAN DAILY MINIMUM5450.352.256.761.467.772.774.374.472.965.957.652.263.2
LOWEST DAILY MINIMUM5521242940495363675740231818
YEAR OF OCCURRENCE198519581980198719921984197019731981196419701962DEC 1962
MEAN OF EXTREME MINS.5432.536.041.148.257.866.570.470.567.352.541.534.651.6
NORMAL DRY BULB3059.961.566.471.277.281.082.182.181.074.967.662.272.3
MEAN DRY BULB5460.462.266.771.577.581.382.382.381.075.067.762.172.5
MEAN WET BULB1856.458.460.964.770.574.976.176.374.969.163.655.166.7
MEAN DEW POINT1852.654.056.660.066.472.073.874.172.665.860.151.563.3
NORMAL NO. DAYS WITH:
MAXIMUM 90300.00.00.00.68.215.820.521.415.42.90.10.084.9
MAXIMUM 32300.00.00.00.00.00.00.00.00.00.00.00.00.0
MINIMUM 32301.80.60.10.00.00.00.00.00.00.00.11.03.6
MINIMUM 0300.00.00.00.00.00.00.00.00.00.00.00.00.0
H/CNORMAL HEATING DEG. DAYS3023416081700000072171725
NORMAL COOLING DEG. DAYS307662130196384489539539477304147843427
RHNORMAL (PERCENT)3075737269707477787874757574
HOUR 01 LST3084838282828485878685868484
HOUR 07 LST3086868786868788909189888788
HOUR 13 LST3058565450526063646256575858
HOUR 19 LST3073696762626973757571747470
SPERCENT POSSIBLE SUNSHINE4963657175756762616165646166
W/OMEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI)555.12.82.51.10.40.30.10.20.31.02.53.619.9
THUNDERSTORMS551.11.72.62.65.113.620.319.711.32.81.21.283.2
CLOUDINESSMEAN:
SUNRISE-SUNSET (OKTAS)
MIDNIGHT-MIDNIGHT (OKTAS)
MEAN NO. DAYS WITH:
CLEAR11.02.09.09.09.0
PARTLY CLOUDY11.02.03.010.09.0
CLOUDY13.01.08.02.05.0
PRMEAN STATION PRESSURE (IN)2830.1230.0930.0530.0229.9930.0130.0530.0229.9930.0130.0730.1130.04
MEAN SEA-LEVEL PRES. (IN)1830.1230.1130.0630.0330.0130.0130.0630.0229.9930.0230.0830.1330.05
WINDSMEAN SPEED (MPH)498.68.99.59.28.67.97.27.07.68.38.38.28.3
PREVAIL. DIR (TENS OF DEGS)3306060909272727090906060609
MAXIMUM 2-MINUTE:
SPEED (MPH)644363144362932293940353744
DIR. (TENS OF DEGS)32283228252219323521192932
YEAR OF OCCURRENCE199919981996199719991999200120002001199620001997JAN 1999
MAXIMUM 5-SECOND:
SPEED (MPH)651443849474747434953414753
DIR. (TENS OF DEGS)32092128341320123421173021
YEAR OF OCCURRENCE199919982001199719971996200119962001199620001997OCT 1996
PRECIPITATIONNORMAL (IN)301.993.083.011.153.105.486.587.615.982.021.772.1543.92
MAXIMUM MONTHLY (IN)558.0210.8212.6410.7117.6413.7520.5918.5913.987.366.1215.5720.59
YEAR OF OCCURRENCE194819981959199719791974196019491979195219631997JUL 1960
MINIMUM MONTHLY (IN)55T0.210.06T0.021.461.652.351.280.06T0.07T
YEAR OF OCCURRENCE195019501956198120011997198119521972200019601984APR 1981
MAXIMUM IN 24 HOURS (IN)553.814.415.205.4411.845.5312.115.378.452.934.484.7612.11
YEAR OF OCCURRENCE199619981960199719791974196019491997198519881997JUL 1960
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01306.76.76.23.66.211.714.816.711.96.25.76.3102.7
PRECIPITATION 1.00300.40.91.00.20.71.81.92.62.10.60.30.613.1
SNOWFALLNORMAL (IN)300.*0.0T0.00.00.00.00.00.00.00.0T0.0
MAXIMUM MONTHLY (IN)550.2TTT0.00.0T0.00.00.00.0T0.2
YEAR OF OCCURRENCE197719511980199719981989JAN 1977
MAXIMUM IN 24 HOURS (IN)550.2TTT0.00.0T0.00.00.00.0T0.2
YEAR OF OCCURRENCE197719511980199719981989JAN 1977
MAXIMUM SNOW DEPTH (IN)530000000000000
YEAR OF OCCURRENCE
NORMAL NO. DAYS WITH:
SNOWFALL 1.0300.00.00.00.00.00.00.00.00.00.00.00.00.0
PRECIPITATION (inches) 2001 TAMPA, FL (TPA)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
19720.544.443.010.381.885.246.659.781.283.293.532.1642.18
19733.752.544.212.420.174.194.779.438.910.982.825.5249.71
19740.170.892.350.381.1113.753.434.674.000.230.122.8033.90
19750.911.561.090.912.078.736.654.2411.254.940.220.8743.44
19760.400.491.641.838.137.224.587.026.041.301.592.0542.29
19772.752.410.730.860.732.665.365.984.280.421.893.4031.47
19782.825.172.440.945.002.035.855.973.083.420.013.1239.85
19795.722.872.430.5517.642.075.9312.7613.980.160.831.5266.46
19801.722.013.094.383.943.815.667.624.051.272.680.3740.60
19810.445.341.70T1.689.371.657.715.870.870.433.5838.64
19821.862.092.991.875.908.3410.497.2010.762.170.851.2955.81
19831.257.357.592.764.107.176.378.896.611.742.334.7160.87
19841.623.321.311.513.193.247.155.684.210.290.720.0732.31
19852.062.071.800.960.226.436.488.659.044.770.991.1344.60
19862.371.494.270.952.465.006.245.463.876.211.331.9541.60
19873.291.5012.010.392.863.396.068.504.761.464.360.5049.08
19882.761.444.091.831.275.193.4011.0913.560.095.971.6452.33
19891.540.411.790.710.247.418.867.906.111.892.054.7243.63
19900.534.581.711.471.765.1610.013.272.422.630.660.1934.39
19912.410.414.731.546.883.789.927.353.430.781.260.6743.16
19921.473.670.952.170.107.032.808.222.952.202.430.9934.98
19933.602.323.932.451.743.182.925.066.604.230.221.2837.53
19943.680.430.663.430.075.9811.318.378.203.290.241.5747.23
19953.512.022.021.481.679.7910.1213.752.804.711.241.0254.13
19965.423.044.654.201.458.962.727.395.443.120.912.1149.41
19970.950.661.2810.711.701.466.738.2012.844.203.4115.5767.71
19984.6410.825.160.411.962.6512.956.558.420.470.400.9255.35
19993.040.290.720.401.524.653.658.356.052.851.781.0234.32
20001.950.300.410.430.024.538.145.445.140.062.041.3929.85
20011.031.186.730.02T6.816.012.8311.762.390.100.8939.75
POR=111 YRS2.292.753.022.052.916.697.537.836.512.571.602.1047.85
AVERAGE TEMPERATURE (F) 2001 TAMPA, FL (TPA)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
197267.060.766.871.476.681.081.982.181.376.168.265.173.2
197361.957.470.269.376.881.883.281.881.775.870.860.172.6
197471.161.170.970.978.280.181.182.882.872.967.961.973.5
197565.166.667.674.081.582.683.283.781.977.968.360.274.4
197656.663.170.570.676.179.081.781.679.371.062.859.671.0
197751.257.570.971.576.583.782.983.082.372.567.758.771.5
197855.053.264.272.378.782.483.082.881.475.171.766.272.2
197957.859.365.474.275.980.883.982.281.975.268.763.072.4
198062.056.668.170.177.281.684.083.081.374.066.457.571.8
198150.461.462.872.475.481.582.581.778.674.564.459.270.4
198259.867.968.171.474.481.582.182.180.274.370.867.673.4
198358.960.363.368.676.880.982.282.279.475.865.959.971.2
198458.062.666.071.078.080.481.582.479.975.764.967.372.3
198555.963.669.472.579.883.782.483.180.579.273.659.073.6
198659.365.065.469.177.481.883.082.682.376.876.366.573.8
198759.263.266.466.477.882.783.183.781.471.368.964.372.4
198858.659.165.670.675.381.082.782.982.073.570.863.072.1
198967.164.969.872.078.482.483.383.082.475.468.956.273.7
199066.169.269.772.180.582.782.583.982.877.670.266.975.4
199166.764.268.476.881.281.382.383.281.975.365.864.674.3
199259.863.664.869.474.382.183.882.482.072.770.064.372.4
199367.060.264.367.276.181.883.883.781.975.869.159.572.5
199460.666.968.075.478.282.681.781.780.276.572.465.174.1
199558.861.468.773.581.880.283.083.382.077.865.261.073.1
199659.260.062.470.479.380.983.783.282.075.868.163.572.4
199762.668.673.971.677.781.882.782.881.774.766.861.373.9
199863.662.564.672.379.285.683.583.681.777.572.568.074.6
199963.864.265.174.377.881.283.683.780.976.368.963.273.6
200061.363.771.071.680.382.482.182.882.374.366.760.373.2
200155.268.265.772.777.482.282.183.279.375.171.368.873.4
POR=111 YRS60.862.466.871.477.080.881.182.180.774.767.462.272.3

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 TAMPA, FL (TPA)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-73000065130166223182100623
1973-740006242000159171200418
1974-75000039138846461500391
1975-7600008818326810918200668
1976-7700011122208422214286001011
1977-780001853222320323994001039
1978-79000027524519053000565
1979-8000004711213626264800629
1980-81000165233447127103200978
1981-820000832232092453800600
1982-830001218952181481032000614
1983-8400005721425211568500711
1984-850000876130611917500595
1985-860000923818578105700622
1986-87000005320288426400449
1987-88000446107221195851400672
1988-89000091274111645700345
1989-900001727285703213500449
1990-9100071170728446000290
1991-920000939417990693250562
1992-930000578358137842400443
1993-940006441851586250500510
1994-95000078120015123100463
1995-960000831801981881521600817
1996-97000336101132390700318
1997-98000736163108103113400534
1998-9900004561189744650330
1999-000005201101549931000401
2000-010003612123184860800710
2001-0009065
COOLING DEGREE DAYS (base 65 F) 2001 TAMPA, FL (TPA)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
197213120902043654875285364973521681413519
19737515188158374510574529510348205553541
197419655204197413460506562540250130483561
197593115151282521536572585512407191394004
1976176319917534842452551744020263453018
197729218210364567559565526258139363453
1978180792324315295655575003192081213559
1979283673283344482592543515322164553437
1980452216416538650659856449328411573349
19810324323033150155252541430371493051
1982561141562082994995375374673111971823563
198336245713736948754054143934291643127
19844252104190410468517546454337921353347
19853088163237464569547566475445275583917
198615851231393915105655515263743481073734
1987274391114405538567583497207169913332
19883032110188326489554562517271191743344
1989112120202224425528575564529344151183792
19901071541642254875375495925414061761394077
199113168158361509498543572515326126883895
1992255570170301519589544518248212723323
1993126127295352511593587513347174213403
199432118148321415535524524461364233913766
1995155914526452646456157451840595633689
1996275076182450482589570516348135633488
19976214528321339751055655950831497553699
199875411072294466235825835063942361603982
1999858452294409492583589481363144623638
20004868197213482529537558524300121713648
200122141922453935225365714343261961873665
SNOWFALL (inches) 2001 TAMPA, FL (TPA)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-730.00.00.00.00.00.00.00.00.00.00.00.00.0
1973-740.00.00.00.00.00.00.00.00.00.00.00.00.0
1974-750.00.00.00.00.00.00.00.00.00.00.00.00.0
1975-760.00.00.00.00.00.00.00.00.00.00.00.00.0
1976-770.00.00.00.00.00.00.20.00.00.00.00.00.2
1977-780.00.00.00.00.00.00.00.00.00.00.00.00.0
1978-790.00.00.00.00.00.00.00.00.00.00.00.00.0
1979-800.00.00.00.00.00.00.00.0T0.00.00.0T
1980-810.00.00.00.00.00.00.00.00.00.00.00.00.0
1981-820.00.00.00.00.00.00.00.00.00.00.00.00.0
1982-830.00.00.00.00.00.00.00.00.00.00.00.00.0
1983-840.00.00.00.00.00.00.00.00.00.00.00.00.0
1984-850.00.00.00.00.00.00.00.00.00.00.00.00.0
1985-860.00.00.00.00.00.00.00.00.00.00.00.00.0
1986-870.00.00.00.00.00.00.00.00.00.00.00.00.0
1987-880.00.00.00.00.00.00.00.00.00.00.00.00.0
1988-890.00.00.00.00.00.00.00.00.00.00.00.00.0
1989-900.00.00.00.00.0T0.00.00.00.00.00.0T
1990-910.00.00.00.00.00.00.00.00.00.00.00.00.0
1991-920.00.00.00.00.00.00.00.00.00.00.00.00.0
1992-930.00.00.00.00.00.00.00.00.00.00.00.00.0
1993-940.00.00.00.00.00.00.00.00.00.00.00.00.0
1994-950.00.00.00.00.00.00.00.00.00.00.00.00.0
1995-960.00.00.00.00.00.00.00.00.00.00.00.00.0
1996-970.00.00.00.00.00.0T0.00.0T0.00.0T
1997-980.00.00.00.00.00.00.00.00.00.00.00.00.0
1998-99T0.00.00.00.00.00.00.00.00.00.00.0T
1999-000.00.00.00.00.00.00.00.00.00.00.00.00.0
2000-010.00.00.00.00.00.00.00.00.00.00.00.00.0
2001-0.00.00.00.00.00.0
POR=54 YRS0.00.00.00.00.0T0.0TT0.00.00.0T

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