National Weather Service United States Department of Commerce

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

 

 

 

For climate data queries, please visit NOWData at:   
http://w2.weather.gov/climate/xmacis.php?wfo=mrx
 
 
 
Helpful Information:
Frost data - search for temperatures at or below 36 degrees
Freeze data - search for temperatures at or below 32 degrees
 
 
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 50.5
  1950 1938 2012 1954 1962 1952 1993 2007 1970 1984 1985 2015

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 6.20 6.74 6.75
  2013 1994 1955 1998 1950 2013 2012 2003 1972 2014 2003 1961

Driest 1.06 0.75 0.94 0.21 0.70 0.75 0.67 0.37 0.50 0.02 0.50 0.21
  1940 1968 2016 1976 2015 1986 1995 2007 1985 2000 2001 1965

 

 For additional information via a searchable database:

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