| How often does Spokane experience temperatures that hit or exceed 100 degrees? The short answer is not very often. In fact, 100+ degree heat is quite rare in Spokane. The period from late July through mid-August is typically when the Spokane area and much of the Inland Northwest experiences its hottest temperatures.
Since 1990, temperatures at or above 100 degrees have been recorded in less than half of the summers (7 out of 18).
In contrast, Wenatchee, Lewiston and other locations in the lower valleys and upper Columbia Basin experience far more days at or above 100 degrees.
The table below shows the distribution of 100+ degree days in Spokane since 1990. Note that weather records for Spokane are based on official data collected at Spokane International Airport (KGEG), which has been the official site since 1947. Prior to 1947, weather records were kept near downtown Spokane, nearly 400 feet
lower than the airport.
100+ Degree Days in Spokane since 1990 |
Year |
Jun |
Jul |
Aug |
Sep |
Annual |
Hottest Day(s) |
1990 |
0 |
0 |
0 |
0 |
0 |
98 Jul 12 |
1991 |
0 |
0 |
0 |
0 |
0 |
95 Jul 24, Aug 18 & 19 |
1992 |
1 |
0 |
1 |
0 |
2 |
101 Jun 23, Aug 14 |
1993 |
0 |
0 |
0 |
0 |
0 |
90 Jun 20 |
1994 |
0 |
3 |
0 |
0 |
3 |
102 Jul 22 |
1995 |
0 |
0 |
0 |
0 |
0 |
93 Jul 19 & 20 |
1996 |
0 |
0 |
0 |
0 |
0 |
99 Aug 10 |
1997 |
0 |
0 |
0 |
0 |
0 |
99 Aug 3 |
1998 |
0 |
2 |
2 |
0 |
4 |
103 Jul 27 |
1999 |
0 |
0 |
0 |
0 |
0 |
95 Jul 28 |
2000 |
0 |
0 |
0 |
0 |
0 |
99 Jul 31 |
2001 |
0 |
0 |
0 |
0 |
0 |
99 Aug 12 |
2002 |
0 |
3 |
0 |
0 |
3 |
102 Jul 12,13 |
2003 |
0 |
1 |
0 |
0 |
1 |
100 Jul 30 |
2004 |
0 |
0 |
0 |
0 |
0 |
97 Aug 13,14 |
2005 |
0 |
0 |
0 |
0 |
0 |
97 Jul 28 |
2006 |
0 |
3 |
0 |
0 |
3 |
102 Jul 23 |
2007 |
0 |
2 |
0 |
0 |
2 |
101 Jul 5 & 13 |
2008 |
0 |
0 |
|
|
|
97 Jun 29 & 30* |
| |
|
|
|
|
|
*thru 8/14 |
100 Degree Weather Facts for Spokane:
- Hottest temperature ever recorded was 108 degrees, August 4, 1961 & July 26, 1928
- Earliest date 100 degrees or higher was recorded in any year was June 22, 1973
- Latest date 100 degrees or higher was reached in any year was August 31, 1967
- There have only been 3 days in June when the temperatures hit 100 degrees or higher
- Most number of consecutive days at or above 100 degrees: 6 days, July 23-28, 1928
- Average number of days between the first and last occurrence of 100+ degrees is 6 days
- Average first occurrence: July 22
- Average last occurrence: July 27
The graph below (click for larger image) shows the frequency of 100+ degree days at Spokane.
|
www.weather.gov 
