Monthly Extremes for Annandale, Virginia  1979 to January 2008

Month Most Precip. Inches Year Least Precip. Inches Year Greatest Snowfall Inches Highest Monthly Mean Temp. Lowest Monthly Mean Temp. Highest Temp. Lowest Temp. Greatest 24hr. Temp. Range Greatest wind Gust MPH
Jan. 6.62  1996  0.56  1981  32.8  42.48  26.08  74  -7  44  64 
Feb. 8.19  2003  0.52  2002  30.9  43.34  29.50  81  -2  39  51 
Mar. 9.39  1994  0.06  2006  14.3  50.47  39.03  90  41  53 
Apr. 8.65  1983  0.17  1985  1.0  60.18  52.50  94  22  41  54 
May 9.38  1989  1.05  1986  0.0  71.06  61.00  97  36  42  45 
Jun. 14.37   2006  0.96  1986  0.0  76.70  69.70  97  45  34  38 
Jul. 6.97  1992  1.69  2007  0.0  81.05  74.35  102  49  31  48 
Aug. 7.53  1990  0.38  1989  0.0  78.56  70.98  101  46  32  37 
Sep. 11.33  1999  0.27  2005  0.0  73.33  65.27  99  40  35  41 
Oct. 9.55  2005  0.06  2000  1.0  64.05  51.10  90  28  37  39 
Nov. 6.32  2006  0.53  1981  13.2  54.03  39.35  82  18  35  56 
Dec. 6.44  1986  0.77  1980  14.2  46.10  25.27  78  41  50 


Extremes for Annandale from 1979 to 2008
TEMPERATURE - Records since September 1979
    Record Highest daily maximum temperature was 102 degrees on 7-16-1988
    Record Lowest daily maximum temperature was 6 degrees on 1-19-1994

    Record Highest daily minimum temperature was 79 degrees on 7-5-1999
    Record Lowest daily minimum temperature was -7 degrees on 1-17-1982, 1-21-1985, 1-19-1994

    Record Highest daily mean temperature was 89.0 degrees on July 5,1999 (Max. 99F Min. 79F)
    Record Lowest daily mean temperature was -0.5 degrees on Jan. 19,1994 (Max. 6F Min. -7F)

    Record Highest daily range of temperature was 44 degrees on 1-19-1996 (Max. 60F Min. 16F)
    Record Lowest daily range of temperature was 1 degree on 10-20-2004 (Max. 53F Min. 52F)

    Record Highest monthly maximum temperature was 102 degrees on 7-16-1988
    Record Lowest monthly maximum temperature was 51 degrees Feb.2003 and Dec.1989

    Record Highest monthly average temperature was 81.1 degrees in July 1999.
    Record Lowest monthly average temperature was 25.3 degrees in Dec. 1989

    Record number of >=90 degrees days in the month was 22 in July 1999.
    Record number of >=90 degrees days in the year was 50 in 2002.

    Record number of days minimum was <=32 degrees in the month was 31 in Dec. 1989.
    Record number of days minimum was <=32 degrees days in the year was 111 in 1995.

    Record number of days maximum was <=32 degrees days in the month was 17 in Jan. 2004.
    Record number of days maximum was <=32 degrees days in the year was 26 in 1996.

PRECIPITATION - Records since September 1979
    Greatest yearly precipitation total was 66.01 inches in 2003
    Least yearly precipitation total was 32.96 inches in 2007
    Greatest seasonal precipitation was 20.52 inches in summer 2006
    Least seasonal precipitation was 3.63 inches in winter 2001-02
    Greatest monthly rainfall was 14.37 inches in June 2006
    Least monthly rainfall was 0.06 inches in Oct. 2000 & March 2006
    Greatest 24-hour rainfall was 5.66 inches on October 7th and 8th of 2005
    The 2nd Greatest 24-hr. rainfall was 5.61 inches from 0500 - June 25th to 0500 on 26th 2006
    Greatest calendar day rainfall was 5.31 inches on 6-25-2006 TS training along a stationary front
    Greatest rainfall recorded in one hour was 2.35 inches on 6-25-2006 in TS between 2030-2130
    Greatest rainfall recorded in 30 minutes was 1.41 inches on 7-23-1992
    Greatest rainfall recorded in 5 minutes was 0.58 inches on 7-23-1992
    Greatest rainfall recorded in 1 minute was 0.14 inches on 7-23-1992
    Greatest number of days with measurable precip. in a month was 23 in May 2003.
    Least number of days with measurable precip. in a month was 2 in Oct. 2000 & Mar. 2006.
    Greatest number of consecutive days of = > 0.01 inches was 05-(01-12)-1998 ( 12 days)
    Greatest number of consecutive days of < 0.01 inches was 10-17-2001 to 11-19-2001 ( 34 days)
    Year with the greatest number of days of = > 0.01 inches was 2003 ( 157 days )
    Years with the least number of days of = > 0.01 inches was 2006 ( 105 days)

SNOWFALL - Records since September 1979
    Greatest yearly snowfall total was 62.4 inches in 1987
    Greatest winter snowfall total was 61.2 inches in 1995-96
    Greatest monthly snowfall was 32.8 inches in January 1987
    Greatest 24-hour snowfall was 24.0 inches on 2-(18-19)-1979
    Maximum snow depth on the ground at any one time 24.7 inches on 1-26-87
    Maximum number of days with snow in one year was 24 days in 2003.

BAROMETRIC PRESSURE
    Highest barometer was 31.11 on 2-13-1981
    Lowest barometer was 28.50 on 3-13-1993

Thunderstorms - Records since 1995
    Greatest in one month was 14 on May 2004 and Aug. 2003.
    Most in one year was 46 in 2003.

WIND - Records since September 1979 except Jan. - Aug. 1986
    Highest wind gust was 64 mph on 1-13-2000

    Highest daily wind run was 238.5 miles on 4-16-2007 -Records since 5-1-2002
    Lowest daily wind run was 000.2 miles on 9-2-2003 -Records since 5-1-2002

Seasonal Extremes for Annandale, VA   1979 to 2008

Precip. Records since Sep. 1979
Days with = > 0.01 inches 1980-03
SPRING
SUMMER
FALL
WINTER
MOST DAYS 49 43 38 40
YEAR
2003
2003
1992
1997-98
LEAST DAYS 24 22 15 20
YEAR 1999 1983, 87, 96 2001 1980-81
TOTAL SEASONAL PRECIP. 1980-03
SPRING
SUMMER
FALL
WINTER
GREATEST 19.19 20.52 18.82 15.74
YEAR
1983
2006
1995
2002-03
LEAST 4.51 6.13 4.45 3.63
YEAR 1986 1985 1998 2001-02
TEMPERATURE
Average Temp. for the Season 1980-03
SPRING
SUMMER
FALL
WINTER
HIGHEST 58.56 78.03 61.54 41.77
YEAR
1991
2002
1985
2001-02
LOWEST 51.63 72.39 54.24 31.71
YEAR 1996 1992 1996 1993-94