Walla Walla Rgnl climate by month
Averages and records for each calendar month at Walla Walla Rgnl, United States, from 1949 to 2026. The warmest month is July, averaging 32.2°C; the coolest is January at 4.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.6°C | −2.0°C | 21.1°C20 January 1968 | −27.8°C27 January 1957 | 75 / 75 |
| February | 7.9°C | 0.1°C | 23.9°C20 February 1995 | −26.7°C1 February 1950 | 74 / 75 |
| March | 12.8°C | 2.6°C | 26.1°C30 March 1964 | −15.6°C1 March 1993 | 74 / 74 |
| April | 17.1°C | 5.2°C | 35.6°C24 April 1977 | −6.7°C19 April 1966 | 74 / 74 |
| May | 21.9°C | 9.0°C | 37.8°C28 May 1983 | −3.3°C1 May 1954 | 74 / 74 |
| June | 26.6°C | 12.6°C | 46.7°C29 June 2021 | 2.2°C1 June 1966 | 74 / 74 |
| July | 32.2°C | 16.3°C | 45.6°C10 July 1975 | 4.4°C7 July 1971 | 74 / 74 |
| August | 31.1°C | 16.1°C | 45.6°C4 August 1961 | 5.6°C24 August 1992 | 74 / 74 |
| September | 25.7°C | 11.7°C | 40.0°C2 September 1950 | 0.0°C17 September 1965 | 73 / 74 |
| October | 17.9°C | 6.4°C | 31.7°C3 October 1958 | −9.4°C31 October 2002 | 73 / 74 |
| November | 9.4°C | 1.8°C | 27.2°C12 November 1999 | −23.9°C23 November 1985 | 74 / 74 |
| December | 5.0°C | −1.3°C | 21.7°C10 December 2014 | −31.1°C30 December 1968 | 74 / 74 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 73 to 75 years each.
See what Walla Walla Rgnl is doing right now
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.