Tri-Cities Climate Normals and Records
(records began in 1937)

Note: The following monthly climatological data is not considered official. For copies of official data, contact the National Climatic Data Center.

 

Daily and Monthly Climate Normals and Records
('Normals' are thirty year averages based on the period 1981-2010)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

 

Tri-Cities Annual Averages
Precipitation.....41.01 inches Days with 0.01" or more of precipitation.....134.4
Snowfall.....13.3 inches Days with 1.0" or more of snowfall.....3.9
Days with thunderstorms.....42.3 Days at or above 90 F.....14.4
Days with dense fog.....47.6 Days at or below 32 F.....97.2
Average first freeze.....October 20 Average last freeze.....April 18
Average first frost.....October 10 Average last frost.....April 30

 

Tri-Cities All-Time Records
All Time Highest Temperature 103 F June 30, 2012
All Time Lowest Temperature -21 F January 21, 1985
Most Rain in One Day 3.65" October 16, 1964
Most Rain in One Month 12.70" July 2012
Most Rain in One Year 65.64" 2003
Most Snow in One Day 16.2" November 21, 1952
Most Snow in One Season 51" 1959-60
Snowfall on Christmas 1.2" 2010
  0.2" 1993
  2.1" 1992
  0.9" 1985
  3.0" 1981
  0.4" 1979
  0.8" 1976
  0.9" 1970
  8.7" 1969
  0.2" 1962 






Warmest/Coldest Monthly Average Temperatures







 
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC




Warmest
50.0
47.7
56.9
61.8
71.2
77.8
79.6
79.0
72.9
63.6
55.3
47.5




 
1950
1938
2012
1954
1962
1952
1993
2007
1970
1984
1985
1971






Coldest
22.1
28.1
33.5
50.4
58.2
67.3
69.8
69.5
62.6
50.1
38.8
27.7




 
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
9.99
7.75
9.56
7.03
9.71
8.37
12.70
11.34
7.09
6.19
6.74
6.75




 
2013
1994
1955
1998
1950
2013
2012
2003
1972
1937
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

 

 For additional information via a searchable database:

www.nws.noaa.gov/climate/xmacis.php


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