2001 Lexington, Kentucky (LEX)

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2001 LEXINGTON, KENTUCKY (LEX)

Lexington, County Seat of Fayette County, is located in the heart of the famed Kentucky Blue Grass Region. Fayette County is a gently rolling plateau with the elevation varying between 900 and 1,050 feet above sea level. It is noted for its beauty, the fertility of its soil, excellent grass, stock farms, and burley tobacco. The soil has a high phosphorus content and this is very valuable in growing pasture grasses for the grazing of cattle and horses. Lexington has a decided continental climate with a rather large diurnal temperature range. The climate is temperate and well suited to a varied plant and animal life. There are no bodies of water close enough to have any effect on the climate. The closest river is the Kentucky which makes an arc about 15 to 20 miles to the southeast, south, and southwest on its course to the Ohio River. There are numerous small creeks that rise in the county and flow into the river. The reservoirs of the Lexington Water Company are about 5 miles southeast of the city and are the largest bodies of water in the area.

Lexington is subject to rather sudden and large changes in temperature with the spells generally of rather short duration. Temperatures above 100 degrees and below zero degrees are relatively rare. The average temperature for the winter is 35 degrees, spring 62 degrees, fall 50 degrees, and summer 74 degrees.

Precipitation is evenly distributed throughout the winter, spring, and summer, with about 12 inches recorded on the average for each of these seasons. The fall season averages nearly 8 1/2 inches. Snowfall amounts are variable and the ground does not retain snow cover more than a few days at a time.

The months of September and October are the most pleasant of the year. They have the least amount of precipitation, the greatest number of clear days, and generally comfortable temperatures are the rule during these months.

Based on the 1951–1980 period, the average first occurrence of 32 degrees Fahrenheit in the fall is October 25 and the average last occurrence in the spring is April 17.

NORMALS, MEANS, AND EXTREMES

LEXINGTON, KY (LEX)

LATITUDE:    LONGITUDE:    ELEVATION (FT):    TIME ZONE:    WBAN: 93820

38 02′ 27″ N  84 36′ 21″ W  GRND: 977  BARO: 980  EASTERN (UTC + 5)

ELEMENTPORJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR
TEMPERATURE FNORMAL DAILY MAXIMUM3039.143.655.365.574.382.785.884.978.367.254.944.264.7
MEAN DAILY MAXIMUM5440.445.154.265.574.682.886.085.078.867.754.544.464.9
HIGHEST DAILY MAXIMUM577680838892101103103103918375103
YEAR OF OCCURRENCE195019961945196219871988199919831954195919871982JUL 1999
MEAN OF EXTREME MAXS.5463.066.575.482.186.791.993.893.290.482.573.864.880.3
NORMAL DAILY MINIMUM3022.425.335.344.253.561.565.764.458.046.037.027.645.1
MEAN DAILY MINIMUM5424.027.034.344.153.862.166.364.757.746.236.227.945.4
LOWEST DAILY MINIMUM57-21-15-218263947423420-3-19-21
YEAR OF OCCURRENCE196319511960198219661966197219651993197619501989JAN 1963
MEAN OF EXTREME MINS.540.94.916.727.637.948.755.453.341.929.818.77.428.6
NORMAL DRY BULB3030.834.545.354.864.072.275.874.768.256.746.035.954.9
MEAN DRY BULB5432.336.044.254.864.272.476.374.968.356.945.336.255.2
MEAN WET BULB1830.234.039.848.558.366.269.568.161.551.241.834.250.3
MEAN DEW POINT1825.428.133.041.953.662.366.064.757.446.136.529.345.4
NORMAL NO. DAYS WITH:
MAXIMUM 90300.00.00.00.00.43.36.85.91.80.00.00.018.2
MAXIMUM 32309.95.80.80.00.00.00.00.00.00.00.55.422.4
MINIMUM 323024.320.213.33.60.10.00.00.00.02.410.920.895.6
MINIMUM 0302.00.70.10.00.00.00.00.00.00.00.00.53.3
H/CNORMAL HEATING DEG. DAYS301060854611312135500472875709024783
NORMAL COOLING DEG. DAYS30000610422133530114330001140
RHNORMAL (PERCENT)3073716663686972727369727470
HOUR 01 LST3076757269768083838377767777
HOUR 07 LST3080797775808285878884818182
HOUR 13 LST3068645854565658585856626860
HOUR 19 LST3070666055596063646664687264
SPERCENT POSSIBLE SUNSHINE
W/OMEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI)572.42.01.40.81.11.11.52.12.11.81.32.019.6
THUNDERSTORMS570.80.92.73.86.47.88.56.32.91.41.00.442.9
CLOUDINESSMEAN:
SUNRISE-SUNSET (OKTAS)525.95.75.65.35.04.84.64.34.24.25.35.75.0
MIDNIGHT-MIDNIGHT (OKTAS)325.85.55.34.94.74.64.34.04.14.15.15.64.8
MEAN NO. DAYS WITH:
CLEAR525.55.75.86.37.06.98.09.510.511.66.75.889.3
PARTLY CLOUDY525.85.67.38.510.011.812.311.98.47.26.75.7101.2
CLOUDY5219.717.017.915.214.011.310.79.611.112.116.619.5174.7
PRMEAN STATION PRESSURE (IN)2929.0529.0228.9628.9428.9428.9628.9929.0129.0329.0529.0429.0429.00
MEAN SEA-LEVEL PRES. (IN)1730.1330.1130.0529.9729.9930.0130.0130.0330.0730.1030.1230.1630.06
WINDSMEAN SPEED (MPH)4610.710.510.810.48.57.87.16.87.58.09.910.29.0
PREVAIL. DIR (TENS OF DEGS)3018181818181818181818181818
MAXIMUM 2-MINUTE:
SPEED (MPH)547403236334437363232373947
DIR. (TENS OF DEGS)18242624313031272126252218
YEAR OF OCCURRENCE199919992001199919971998199919972000200120002001JAN 1999
MAXIMUM 5-SECOND:
SPEED (MPH)556534648475651453844494956
DIR. (TENS OF DEGS)19232120193032013226242319
YEAR OF OCCURRENCE199919991998199920011998199920002000200120002001JAN 1999
PRECEPITATIONNORMAL (IN)302.863.214.403.884.473.665.003.933.202.573.393.9844.55
MAXIMUM MONTHLY (IN)5716.6510.1213.829.3010.8411.6910.6411.189.696.136.8710.1716.65
YEAR OF OCCURRENCE195019891997197019831960195819741979198319511990JAN 1950
MINIMUM MONTHLY (IN)570.370.670.990.791.200.611.260.290.240.330.450.610.24
YEAR OF OCCURRENCE198119781966194619651988199519981959196319761965SEP 1959
MAXIMUM IN 24 HOURS (IN)572.983.795.564.393.245.884.733.564.353.212.713.775.88
YEAR OF OCCURRENCE195119891997194819831960197819681979196219881978JUN 1960
NORMAL NO. DAYS WITH:
PRECIPITATION 0.013011.311.212.511.912.010.211.29.28.78.410.711.8129.1
PRECIPITATION a1.00300.60.71.10.91.10.71.51.00.70.50.90.910.6
SNOWFALLNORMAL (IN)306.45.22.20.4T0.00.00.00.00.*0.82.517.5
MAXIMUM MONTHLY (IN)5221.916.417.75.9TTTT0.00.29.710.721.9
YEAR OF OCCURRENCE19781960196019871995199319891989197219501967JAN 1978
MAXIMUM IN 24 HOURS (IN)5210.27.39.54.9TTTT0.00.27.57.810.2
YEAR OF OCCURRENCE19941971194719871995199319891989197219661967JAN 1994
MAXIMUM SNOW DEPTH (IN)481491220000008514
YEAR OF OCCURRENCE197819851960196119501984JAN 1978
NORMAL NO. DAYS WITH:
SNOWFALL 1.0302.01.70.70.10.00.00.00.00.00.00.30.75.5
PRECIPITATION (inches) 2001 LEXINGTON, KY (LEX)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
19724.105.604.048.753.843.615.583.954.302.714.216.9257.61
19731.531.585.085.678.226.065.153.581.402.656.583.4250.92
19746.392.245.893.335.527.214.8211.184.181.534.083.7260.09
19753.665.7010.386.172.692.235.603.966.465.092.934.2459.11
19763.594.673.721.243.163.346.741.264.233.860.451.2237.48
19772.301.034.213.421.514.804.594.832.713.773.953.0440.16
19786.380.672.873.155.741.947.6010.003.103.203.119.9757.73
19794.072.923.224.924.172.804.726.209.692.964.523.8154.00
19801.631.176.042.822.271.885.555.102.472.072.021.6734.69
19810.374.761.764.885.102.295.272.721.972.441.993.1036.65
19825.482.163.892.192.513.953.824.011.211.563.454.5338.76
19831.291.611.485.1810.842.182.411.261.336.133.593.4640.76
19841.643.314.095.025.342.204.800.561.363.875.194.8942.27
19851.911.113.692.344.344.983.373.761.934.234.961.1337.75
19860.532.482.431.653.241.295.642.673.082.066.493.3034.86
19871.303.623.132.231.806.593.484.180.910.552.726.1736.68
19882.943.062.342.933.020.613.514.185.961.345.393.6238.90
19893.9910.126.082.605.394.264.203.984.983.382.381.8053.16
19904.173.431.892.375.414.596.454.362.124.492.6910.1752.14
19912.573.915.802.703.952.913.603.082.092.701.277.2241.80
19923.631.844.702.114.687.7410.274.733.440.653.501.8049.09
19932.424.153.773.532.435.463.384.523.004.195.423.3145.58
19944.504.426.835.184.863.842.293.721.192.112.893.8745.70
19955.012.263.323.908.978.171.264.892.763.643.192.7150.08
19964.511.864.624.848.985.105.302.304.152.104.795.2653.81
19973.703.9713.821.898.859.543.292.582.382.374.062.6859.13
19983.992.583.406.206.1410.817.980.290.612.411.963.2349.60
19995.772.383.802.231.315.382.470.991.391.631.822.7031.87
20003.404.813.894.522.993.823.363.505.320.742.003.7542.10
20011.353.563.271.146.002.585.782.932.463.713.302.8938.97
POR=118 YRS3.963.254.503.634.064.244.433.442.812.403.203.7043.62
AVERAGE TEMPERATURE (F) 2001 LEXINGTON, KY (LEX)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
197235.433.242.253.763.267.673.872.969.853.044.540.954.2
197335.135.253.852.960.173.675.874.972.260.948.536.456.6
197440.737.448.555.863.667.274.473.362.654.345.737.855.1
197537.339.541.452.267.473.576.477.563.457.448.535.855.9
197628.443.950.054.560.671.173.071.264.149.737.130.952.9
197717.834.950.859.669.872.378.475.772.256.149.033.455.8
197821.621.340.457.061.173.176.074.170.953.748.437.953.0
197923.626.948.053.863.170.974.074.066.955.645.737.953.4
198032.428.341.552.564.871.278.878.270.653.743.636.054.3
198127.537.042.659.660.473.875.873.465.855.645.933.054.2
198228.234.947.150.669.868.577.172.965.658.348.444.255.5
198333.837.246.350.860.772.879.880.570.259.046.528.455.5
198427.641.239.753.160.676.072.974.966.563.541.845.455.3
198523.830.548.558.564.770.375.172.867.660.553.029.654.6
198633.238.646.857.365.574.278.672.971.058.044.935.756.4
198731.938.046.853.770.375.077.177.570.052.050.038.956.8
198829.833.744.854.264.574.379.177.967.849.646.136.554.9
198940.533.147.354.260.671.676.574.167.657.045.023.054.2
199041.643.148.953.261.672.275.373.868.556.449.940.457.1
199133.939.147.458.170.574.377.675.868.858.743.440.157.3
199235.241.345.456.162.069.475.670.967.055.845.937.055.1
199337.433.142.052.765.072.180.176.566.055.144.635.055.0
199425.236.843.658.160.275.176.873.766.257.850.641.255.4
199533.933.547.255.563.372.877.379.566.556.939.733.054.9
199631.035.739.150.965.672.173.173.666.356.439.839.553.6
199731.640.846.249.158.069.376.172.766.656.141.635.653.6
199840.741.145.853.767.572.774.576.274.157.947.439.757.6
199936.240.240.356.565.373.579.675.768.856.750.337.356.7
200031.942.748.353.366.873.573.873.766.359.443.525.154.9
200131.139.940.659.766.571.375.376.166.156.752.040.956.4
POR=118 YRS33.135.444.154.464.172.776.274.869.057.245.235.955.2

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 LEXINGTON, KY (LEX)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-731012036661273992082735337116704386
1973-740121172490880744767514289128374043
1974-75001253385788368527057263875144602
1975-7600128249488895113060646833915824463
1976-7714644748291050145783644420852195438
1977-780062774989721338121975525417965504
1978-79002034849283412771061522337110155016
1979-8005403075748331005105772137188175018
1980-810023358633892115677768718218004888
1981-82007728656898511348405494291494891
1982-83017525950064696177258042215174374
1983-8400592015501128115268577837017835104
1984-85208984689601127595951022866234526
1985-86007217936010929787355612599424332
1986-870151425059590310167495593423904482
1987-880017399447804108590162032890184709
1988-89033047456087775088754835119684684
1989-9006612675921297720608505378128174579
1990-9103572884537579557195442153404025
1991-920077230642765915682600293159174380
1992-93056428856686384788470536364274676
1993-940067313608922123178365822918534999
1994-95033723242573096087754529810824217
1995-96006525475598310488447994269685278
1996-9700642687507841025670576471233314872
1997-98133932169890474566661433146244392
1998-990082375227818876907582545114189
1999-00004325443385510196405133465364162
2000-0100842156421227104369275222656204957
2001-0084275387741
COOLING DEGREE DAYS (base 65 F) 2001 LEXINGTON, KY (LEX)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
19720001147130287250171040900
19730012182126634231424551001269
197400102194108296264601140868
1975000111302673573948618001263
1976009302619325720546400770
197700115220624142233723282301532
197800019692573492902024001190
19790028571992872921022100968
198000048721043841519917001370
198100129432703412671092001062
1982000417112138325210162971110
198300432724846548721921001474
1984000175034025431214144101159
1985005406718931724515549401071
19860043411528542726919742001373
1987000102123043833951732501484
19880018813064424071205001370
1989008346621436229614627001153
19900013293223932628516826501123
19910031521028539834119841001491
19920003576155340192132800938
199300027424747436510313301281
199400031433123722808016001134
1995000226524639145711710001308
1996000712222825827410910001008
1997000224166354249945100940
19980025013226430335629124011396
19990005672614593391616101299
2000010211326827927812645301115
20010007511121232735112424201226
SNOWFALL (inches) 2001 LEXINGTON, KY (LEX)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-730.00.00.00.21.70.41.01.40.40.20.00.05.3
1973-740.00.00.00.00.04.3T3.60.7T0.00.08.6
1974-750.00.00.0T1.42.84.61.55.6T0.00.015.9
1975-760.00.00.00.0T0.96.50.42.20.00.00.010.0
1976-770.00.00.00.02.91.618.53.50.10.80.00.027.4
1977-780.00.00.00.01.73.021.97.18.40.00.00.042.1
1978-790.00.00.00.00.00.711.411.60.1T0.00.023.8
1979-800.00.00.00.00.1T11.94.04.20.30.00.020.5
1980-810.00.00.00.00.10.52.20.40.50.00.00.03.7
1981-820.00.00.00.00.41.75.63.90.30.70.00.012.6
1982-830.00.00.00.00.0T0.27.50.3T0.00.08.0
1983-840.00.00.00.0T1.78.44.60.30.00.00.015.0
1984-850.00.00.00.0T4.910.210.7T0.50.00.026.3
1985-860.00.00.00.00.03.51.28.90.7T0.00.014.3
1986-870.00.00.00.00.2T3.63.52.15.90.00.015.3
1987-880.00.00.00.01.01.83.33.40.70.00.00.010.2
1988-890.00.00.00.0T0.7T1.5TTT0.02.2
1989-90TT0.0T1.19.30.2T3.7T0.00.014.3
1990-910.00.00.00.00.00.80.13.21.70.00.00.05.8
1991-920.00.00.00.0T0.20.70.61.30.40.00.03.2
1992-930.00.00.0T1.82.50.411.57.1T0.0T23.3
1993-940.00.00.0T0.17.416.42.85.00.00.00.031.7
1994-950.00.00.00.00.0T2.03.73.40.0T0.09.1
1995-960.00.00.0T1.12.216.03.81.50.0
1996-970.00.0TT
1997-98
1998-99
1999-00
2000-01
2001-
POR=51 YRSTT0.00.00.61.95.74.62.60.3TT15.7

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