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Tri-Cities Climate Normals and Records(records began in 1934)
Note: The following monthly climatological data is not considered official. For copies of official data, contact the National Climatic Data Center.
| Tri-Cities Annual Averages |
| Precipitation.....41.3 inches |
Days with 0.01" or more of precipitation.....135 |
| Snowfall.....15.0 inches |
Days with 1.0" or more of snowfall.....5 |
| Days with thunderstorms.....42 |
Days at or above 90 F.....13 |
| Days with dense fog.....45 |
Days at or below 32 F.....94 |
| Average first freeze.....October 21 |
Average last freeze.....April 17 |
| Average first frost.....October 13 |
Average last frost.....April 30 |
| Tri-Cities All-Time Records |
| All Time Highest Temperature |
102 F |
July 29, 1952 |
| All Time Lowest Temperature |
-21 F |
January 21, 1985 |
| Most Rain in One Hour |
2.83" |
September 2, 1978 |
| Most Rain in 24 Hours |
3.65" |
October 16, 1964 |
| Most Rain in One Month |
11.34" |
August 2003 |
| Most Rain in One Year |
65.65" |
2003 |
| Most Snow in 24 Hours |
16.2" |
November 21, 1952 |
| Most Snow in One Season |
51" |
1959-60 |
| Snowfall on Christmas |
0.5" |
2002 |
|
Trace |
1999 |
|
Trace |
1995 |
|
0.2" |
1993 |
|
2.1" |
1992 |
|
0.9" |
1985 |
|
3.0" |
1981 |
|
Trace |
1980 |
|
Trace |
1977 |
|
0.8" |
1976 |
|
0.5" |
1970 |
|
10.0" |
1969 |
| Strongest Wind Gust |
66 MPH |
May 9, 2003 |
| Warmest/Coldest Monthly Average Temperatures |
|
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
| Warmest |
50.1 |
47.7 |
56.0 |
61.8 |
71.2 |
77.9 |
79.6 |
79.0 |
72.9 |
63.6 |
55.3 |
47.5 |
|
1950 |
1938 |
1945 |
1954 |
1962 |
1952 |
1993 |
2007 |
1970 |
1984 |
1985 |
1956 |
| Coldest |
22.1 |
28.1 |
33.5 |
50.5 |
58.3 |
67.4 |
69.8 |
69.5 |
62.6 |
50.2 |
38.8 |
27.8 |
|
1977 |
1958 |
1960 |
1983 |
1997 |
1972 |
1967 |
1946 |
1967 |
1988 |
1976 |
1963 |
| Wettest/Driest Monthly Precipitation Totals |
|
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
| Wettest |
9.18 |
7.75 |
9.56 |
7.03 |
9.71 |
7.37 |
9.73 |
11.34 |
7.09 |
5.65 |
6.74 |
6.75 |
|
1957 |
1994 |
1955 |
1998 |
1950 |
1998 |
1949 |
2003 |
1972 |
1959 |
2003 |
1961 |
| Driest |
1.06 |
0.75 |
1.31 |
0.21 |
0.76 |
0.75 |
0.67 |
0.37 |
0.50 |
0.02 |
0.50 |
0.21 |
|
1940 |
1968 |
1985 |
1976 |
2007 |
1986 |
1995 |
2007 |
1985 |
2000 |
2001 |
1965 |
|
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