2001 Savannah, Georgia (SAV)

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2001 SAVANNAH, GEORGIA (SAV)

Savannah is surrounded by flat terrain, low and marshy to the north and east, and rising to several feet above sea level to the west and south. About half the land to the west and south is cleared and the other half is wooded and swampy.

The area has a temperate climate, with a seasonal low temperature of 5l degrees in winter, 66 degrees in spring, 80 degrees in summer, and 66 degrees in autumn. The lowest temperatures are below 10 degrees and the highest temperatures are about 100 degrees.

The normal annual rainfall is about 49 inches. About half falls in the thunderstorm season of June 15 through September 15. The remainder, produced principally by squall–line and frontal showers, is spread over the other nine months with a minor peak in March. Considerable periods of fair, mild weather are experienced in October, November, April, and to a less extent, in May. Snow is a rarity and even a trace does not occur on an average of once a year. The heaviest snowfalls are under 5 inches. Severe tropical storms affect this area about once in ten years. Rainfall from these storms constitute the heaviest sustained precipitation. Accumulations exceeding 22 inches have occurred.

The present exposure of the thermometers gives readings more nearly commensurate with those of suburban street levels of Savannah than was the case of previous locations atop various buildings. During that time, especially on still, clear nights, temperatures near the ground and in lower inland areas were as much as 15 degrees lower than the official low temperature. Present differences on comparable nights range from 3–8 degrees.

Sunshine is adequate at all seasons and seldom are there two or more days in succession without it. Sea–and land–breeze effect is usually not felt in Savannah, though it is a daily feature on the nearby islands. Dry, continental air masses reach this area in summer mostly by sliding down the Atlantic coast and giving cooler northeast winds. Such masses reaching this area from the northwest or west in summer bring mostly clear skies and high temperatures.

Based on the 1951–1980 period, the average first occurrence of 32 degrees Fahrenheit in the fall is November 15 and the average last occurrence in the spring is March 10.

NORMALS, MEANS, AND EXTREMES

SAVANNAH, GA (SAV)

LATITUDE:    LONGITUDE:    ELEVATION (FT):    TIME ZONE:    WBAN: 03822

32 07′ 08″ N  81 12′08″W  GRND: 48  BARO: 51  EASTERN (UTC + 5)

ELEMENTPORJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR
TEMPERATURE FNORMAL DAILY MAXIMUM3059.762.470.177.584.088.891.189.785.277.570.062.376.5
MEAN DAILY MAXIMUM5160.363.970.377.784.589.191.690.385.678.170.162.577.0
HIGHEST DAILY MAXIMUM518486919510010410510498978983105
YEAR OF OCCURRENCE195719891974198619531985198619541986198619611971JUL 1986
MEAN OF EXTREME MAXS.5176.079.684.489.393.797.498.397.093.788.582.477.888.2
NORMAL DAILY MINIMUM3038.141.148.354.562.969.272.472.267.856.948.141.056.0
MEAN DAILY MINIMUM5138.341.447.554.062.369.272.271.967.756.646.840.255.7
LOWEST DAILY MINIMUM5131420323951615743281593
YEAR OF OCCURRENCE198519581980198719631984197219861967195219701983JAN 1985
MEAN OF EXTREME MINS.5121.024.630.438.649.060.366.765.756.239.329.523.142.0
NORMAL DRY BULB3048.951.859.266.073.579.181.881.076.667.359.151.766.3
MEAN DRY BULB5149.352.658.865.973.279.281.981.176.767.358.251.366.3
MEAN WET BULB1745.548.753.258.266.072.275.074.670.762.154.744.760.5
MEAN DEW POINT1739.642.446.952.261.469.172.272.268.158.150.439.656.0
NORMAL NO. DAYS WITH:
MAXIMUM 90300.00.00.11.55.514.221.118.17.40.70.00.068.6
MAXIMUM 32300.20.0*0.00.00.00.00.00.00.00.00.10.3
MINIMUM 323010.87.21.90.10.00.00.00.00.00.12.48.430.9
MINIMUM 0300.00.00.00.00.00.00.00.00.00.00.00.00.0
H/CNORMAL HEATING DEG. DAYS305163782044700000632134261847
NORMAL COOLING DEG. DAYS30169247726642352149634813536142365
RHNORMAL (PERCENT)3070676765707476797873727172
HOUR 01 LST3078777879848688908884837983
HOUR 07 LST3082818383858789919187868286
HOUR 13 LST3054514946505558616053525454
HOUR 19 LST3066616058636872767672726968
SPERCENT POSSIBLE SUNSHINE4654576271686563625763615562
W/OMEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI)514.53.23.12.63.02.41.12.03.53.34.64.738.0
THUNDERSTORMS511.11.42.93.66.810.414.812.05.51.60.60.661.3
CLOUDINESSMEAN:
SUNRISE-SUNSET (OKTAS)465.04.94.84.34.64.94.94.94.94.14.24.84.7
MIDNIGHT-MIDNIGHT (OKTAS)324.64.54.33.74.14.44.54.44.33.73.84.34.2
MEAN NO. DAYS WITH:
CLEAR469.38.59.010.69.26.85.65.87.011.811.09.2103.8
PARTLY CLOUDY466.06.28.58.610.011.213.613.610.37.97.07.1110.0
CLOUDY4615.713.713.510.711.812.011.911.612.611.412.014.7151.6
PRMEAN STATION PRESSURE (IN)2830.0930.0530.0029.9829.9629.9629.9929.9929.9930.0330.0730.0930.02
MEAN SEA-LEVEL PRES. (IN)1730.1430.1230.0630.0330.0130.0130.0530.0230.0230.0830.1230.1530.07
WINDSMEAN SPEED (MPH)388.39.09.08.57.77.26.96.57.27.57.47.77.7
PREVAIL. DIR (TENS OF DEGS)2527302718181823230404032718
MAXIMUM 2-MINUTE:
SPEED (MPH)529314330294345374032262945
DIR. (TENS OF DEGS)32091631300504340136020104
YEAR OF OCCURRENCE200019982001200119971998199719991999199920012000JUL 1997
MAXIMUM 5-SECOND:
SPEED (MPH)540375841435651545444313858
DIR. (TENS OF DEGS)32281626270604061701012716
YEAR OF OCCURRENCE200019992001200119991998199719971998199920012000MAR 2001
PRECIPITATIONNORMAL (IN)303.593.223.783.034.095.666.387.464.472.392.192.9649.22
MAXIMUM MONTHLY (IN)518.987.929.5710.5710.0814.3920.1017.0313.4719.845.265.8020.10
YEAR OF OCCURRENCE199119641959199119571963196419951953199419931977JUL 1964
MINIMUM MONTHLY (IN)510.450.260.180.380.360.841.351.020.350.020.150.120.02
YEAR OF OCCURRENCE198919911955198620011954197219801991200019661984OCT 2000
MAXIMUM IN 24 HOURS (IN)513.743.464.655.625.676.776.368.716.808.865.023.478.86
YEAR OF OCCURRENCE199819641959197619761999195719951979199419691964OCT 1994
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01309.68.89.16.98.711.113.713.39.76.06.48.5111.8
PRECIPITATION 1.00300.90.61.20.91.21.71.92.21.40.50.60.713.8
SNOWFALLNORMAL (IN)300.10.30.*0.00.00.00.00.00.00.00.00.10.5
MAXIMUM MONTHLY (IN)472.03.61.10.00.0T0.00.00.00.00.03.63.6
YEAR OF OCCURRENCE19771968198619891989DEC 1989
MAXIMUM IN 24 HOURS (IN)471.33.61.10.00.0T0.00.00.00.00.03.43.6
YEAR OF OCCURRENCE19771968198619891989FEB 1968
MAXIMUM SNOW DEPTH (IN)450400000000044
YEAR OF OCCURRENCE19681989DEC 1989
NORMAL NO. DAYS WITH:
SNOWFALL 1.0300.*0.10.*0.00.00.00.00.00.00.00.00.*0.1
PRECIPITATION (inches) 2001 SAVANNAH, GA (SAV)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
19723.994.613.841.205.846.541.3512.620.360.544.912.7748.57
19733.614.465.364.431.239.192.896.453.650.190.683.2645.40
19741.372.791.872.757.256.006.487.902.610.100.961.8541.93
19753.173.013.994.716.002.0811.553.138.011.251.093.1951.18
19762.191.242.515.626.337.497.567.2810.074.754.833.8763.74
19773.141.832.721.941.032.005.628.016.521.162.075.8041.84
19784.023.141.933.684.502.193.614.432.610.601.852.8535.41
19793.964.142.423.838.497.3710.782.6512.200.702.702.6861.92
19802.951.297.753.684.503.472.381.025.811.622.041.3337.84
19811.032.943.911.752.103.015.4210.912.881.291.653.1740.06
19823.472.941.646.254.189.156.709.182.981.740.403.6352.26
19835.905.239.015.151.075.815.303.673.391.034.184.7754.51
19848.873.215.133.415.291.487.883.467.431.233.150.1250.66
19850.511.371.651.372.186.725.009.420.763.374.282.0138.64
19862.035.282.850.382.062.985.4912.310.491.994.405.0745.33
19878.624.395.330.503.828.034.379.468.160.332.061.4156.48
19883.444.092.115.053.522.631.8010.689.622.811.430.9948.17
19890.450.671.413.593.107.304.916.297.984.711.265.2046.87
19903.913.083.791.752.070.971.927.251.2612.502.482.1043.08
19918.980.265.4810.577.135.1215.4110.510.351.601.261.7568.42
19926.602.243.972.082.0413.012.037.698.423.605.151.5358.36
19935.523.357.963.221.312.484.343.046.842.585.262.1548.05
19944.700.783.752.136.177.806.902.646.6019.843.674.4669.44
19952.444.470.720.693.525.896.6517.034.103.421.290.8951.11
19962.011.354.292.431.442.445.237.122.843.450.882.7236.20
19973.122.341.543.622.995.9011.644.565.325.655.043.9855.70
19987.516.883.985.681.971.938.273.795.561.280.302.3249.47
19994.731.951.251.682.5414.257.154.266.502.040.491.9448.78
20002.711.564.302.840.965.473.384.187.45T1.772.8237.44
20011.710.776.650.710.366.414.854.654.720.160.160.4931.64
POR=132 YRS3.033.103.592.933.365.586.617.005.512.861.982.7048.25
AVERAGE TEMPERATURE (F) 2001 SAVANNAH, GA (SAV)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
197257.551.359.366.771.675.781.081.077.368.158.157.167.1
197349.849.663.664.073.579.382.280.079.068.961.651.266.9
197462.953.063.865.674.576.879.279.676.364.657.753.167.3
197555.357.759.565.476.779.578.481.776.570.059.350.567.5
197645.956.462.664.369.775.881.778.274.962.551.549.064.4
197739.949.262.167.674.082.083.381.178.964.161.250.066.1
197843.943.656.368.073.780.082.282.378.267.064.753.466.1
197945.449.059.867.773.976.882.181.477.467.560.450.766.0
198050.748.557.166.273.379.784.483.480.465.456.748.166.2
198143.552.656.869.071.684.584.479.275.265.457.748.365.7
198248.755.962.164.874.380.281.381.075.567.661.857.467.6
198346.150.858.062.873.078.284.182.975.769.757.748.565.6
198447.753.759.365.772.979.280.681.575.073.255.759.567.0
198545.353.061.566.974.681.382.780.776.672.267.548.967.6
198647.656.959.166.875.082.585.781.679.770.065.053.968.7
198749.050.458.263.974.180.683.684.577.861.560.454.766.6
198845.050.258.266.172.477.782.782.577.464.261.351.165.7
198956.656.160.665.672.381.082.980.776.868.659.543.767.0
199055.760.062.665.074.381.584.482.478.970.760.856.569.4
199152.256.262.470.077.579.483.282.277.968.456.655.668.5
199249.955.759.264.571.778.684.381.077.166.660.652.066.8
199354.850.357.062.473.681.386.783.179.668.159.949.767.2
199447.756.062.969.672.480.782.281.276.667.863.754.968.0
199550.752.462.569.176.579.283.882.476.171.555.650.167.5
199650.154.656.064.075.278.882.479.376.166.555.952.966.0
199750.955.164.763.168.975.481.279.376.966.655.150.565.6
199852.954.156.465.375.683.083.481.277.568.962.655.568.0
199952.454.355.869.070.877.182.783.175.767.859.750.866.6
200048.153.261.762.875.379.282.081.075.564.855.643.765.2
200146.856.057.465.173.078.880.881.374.264.963.055.966.4
POR=128 YRS51.253.359.466.173.579.481.781.077.067.958.852.266.8

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 SAVANNAH, GA (SAV)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-73000252392614624239885401597
1973-740004714843510734012473101275
1974-750027924336831523221286001537
1975-7600025228446586256134691101755
1976-7700014240549077143715242202441
1977-780009616545764559428335202277
1978-79000455337860244818117101725
1979-800004118343843648925743701894
1980-810007225251865934226325802139
1981-820035923151350125814976001790
1982-8300073139266579392228115001792
1983-840021923251353132020068701892
1984-85001829918561536015760201687
1985-86001165150453124021559401621
1986-8705048101349491401231110501741
1987-8800012218533261242621852101948
1988-89000841414232682891931101301521
1989-900015919165328617513581001581
1990-910005514327939526013914001285
1991-92000342703154612742041012201681
1992-9300145194401320406254113001734
1993-940014519347053026012320701649
1994-95000329531743335811430101380
1995-9600625313457457313288109701975
1996-9700051287374435290881072451661
1997-980008030044237330328363001844
1998-9900044107305390294283601701500
1999-000005617943651834012297101749
2000-010017230465556026224888002190
2001-004107103294
COOLING DEGREE DAYS (base 65 F) 2001 SAVANNAH, GA (SAV)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
19722881413021432850550337912538232295
197300636327543454047342917752132519
19745299699302360448462347743282289
19752033481043744394235283511876522574
1976012685316433152641630670711954
19770171130289517574508421745802643
1978002213228145653854340311551292570
197905281052823605375163781265122390
1980016198727044960757946890822595
19810114150219589609444319801742446
1982610677929246351450332315848422505
19830016552534005985623321711862411
198400319426143148651730927024192442
198511315812330749655749635524813372822
198601840121321532651525449212107132989
19870026852924745836113922250212556
1988031192238386555547378663512312
19891345641352484885634933621773302621
1990441699029650360854942223725242868
19917186416939744157254039314325292798
199201129942344146035043701016972436
199312010432714976785674471494612721
19940146216524347654250935512563142568
199519461603664335915473482353642776
199632019843314195494513391052022342
199742084571553225104523631371102115
1998105247733654657550838317344182699
19997141872053685565683281532612404
2000352737325435538503325732802299
2001217209925342249951528710649192288
SNOWFALL (inches) 2001 SAVANNAH, GA (SAV)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-730.00.00.00.00.00.0T3.20.00.00.00.03.2
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
1975-760.00.00.00.00.00.0T0.00.00.00.00.0T
1976-770.00.00.00.00.00.02.0T0.00.00.00.02.0
1977-780.00.00.00.00.00.00.00.00.00.00.00.00.0
1978-790.00.00.00.00.00.00.0T0.00.00.00.0T
1979-800.00.00.00.00.00.00.00.0T0.00.00.0T
1980-810.00.00.00.00.0T0.00.00.00.00.00.0T
1981-820.00.00.00.00.00.00.00.00.00.00.00.00.0
1982-830.00.00.00.00.00.0T0.0T0.00.00.0T
1983-840.00.00.00.00.00.0T0.00.00.00.00.0T
1984-850.00.00.00.00.00.00.00.00.00.00.00.00.0
1985-860.00.00.00.00.00.00.30.01.10.00.00.01.4
1986-870.00.00.00.00.00.0T0.00.00.00.00.0T
1987-880.00.00.00.00.00.0TT0.00.00.00.0T
1988-890.00.00.00.00.0T0.01.00.00.00.0T1.0
1989-900.00.00.00.00.03.60.00.00.00.00.00.03.6
1990-910.00.00.00.00.00.00.0T0.00.00.00.0T
1991-920.00.00.00.00.00.00.00.00.00.00.00.00.0
1992-930.00.00.00.00.00.00.00.00.20.00.00.00.2
1993-940.00.00.00.00.0T0.0T0.00.00.00.0T
1994-950.00.00.00.00.00.00.0T0.00.00.00.0T
1995-960.00.00.00.00.00.0T0.20.0
1996-97
1997-98
1998-99
1999-00
2000-01T
2001-
POR=45 YRS0.00.00.00.00.00.10.10.20.00.00.0T0.4

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