Grant County Airport, WA Climate

Summary Graph

The summary climate graph for Grant County Airport, WA shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Grant County Airport, WA.


The warmest month in Grant Co International, Grant County Airport, Washington is July with an average high temperature of 89.8°F. The hottest day on record was August 4 1961 when the temperature hit 111.9°F. During January the overnight temperature drops to an average of 22.7°F with the lowest temperature of -27.9°F being recorded on February 1 1950.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

4 Aug 1961111.9°F
25 Jul 1984111°F
20 Jul 1989109.9°F
3 Sep 1988109°F
20 Jul 1979108°F

The warmest months on average were:

July 198598.2°F
July 199895.4°F
August 198194.5°F
July 196094.4°F
July 200694.4°F

The coldest days on record are:

1 Feb 1950-27.9°F
31 Jan 1950-25.1°F
26 Jan 1957-20°F
3 Feb 1996-19.1°F
24 Nov 2010-18.9°F

The coldest months on average were:

January 19500.3°F
January 19799.6°F
January 19579.7°F
January 200813.4°F
February 198513.9°F


The wettest month by average rainfall in Grant County Airport, WA is December with an average of 0.2 inches of rain falling on 6 to 7 days.Although in November it typically rains on more days with 0.2 inches falling in 8 to 9 days. The driest month by average rainfall in Grant County Airport, WA is August with an average of 0.0 inches of rain falling on 2 to 3 days. Although in July it typically rains on less days with 0.1 inches falling in 2 to 3 days

Wettest Days

The wettest days on record are:

31 July 19980.6 inches
21 July 20120.4 inches
30 July 19970.3 inches
9 July 20050.3 inches
13 July 20090.2 inches

Wettest Months

The wettest months on record are:

January 20062.5 inches
December 20062.1 inches
December 20102 inches
December 20122 inches
June 20121.9 inches

Driest Months

The driest months on record are:

October 19750 inches
August 19430 inches
September 19430 inches
October 19430 inches
November 19430 inches