Pendleton weather by month
Measured at Pendleton/E Oregon Rgnl
Averages and records for each calendar month at Pendleton/E Oregon Rgnl, United States, from 1928 to 2026. The warmest month is July, averaging 31.6°C; the coolest is January at 4.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.4°C | −2.9°C | 21.7°C24 January 1935 | −30.0°C27 January 1957 | 99 / 99 |
| February | 7.9°C | −1.0°C | 23.9°C8 February 1996 | −27.8°C2 February 1950 | 99 / 99 |
| March | 12.7°C | 1.6°C | 27.2°C25 March 2025 | −17.2°C1 March 1993 | 99 / 99 |
| April | 16.9°C | 4.0°C | 35.0°C22 April 1934 | −7.8°C1 April 1936 | 99 / 99 |
| May | 21.7°C | 7.7°C | 38.9°C12 May 1931 | −3.9°C1 May 1954 | 99 / 99 |
| June | 26.1°C | 11.1°C | 47.2°C29 June 2021 | 1.7°C4 June 1991 | 99 / 99 |
| July | 31.6°C | 14.3°C | 45.6°C25 July 1928 | 3.3°C5 July 1932 | 99 / 99 |
| August | 30.5°C | 13.8°C | 45.0°C4 August 1961 | 4.4°C20 August 1944 | 99 / 99 |
| September | 25.4°C | 9.9°C | 40.0°C3 September 1930 | −1.7°C23 September 1931 | 98 / 99 |
| October | 17.8°C | 4.8°C | 33.9°C1 October 1931 | −11.7°C30 October 1935 | 98 / 98 |
| November | 9.4°C | 0.6°C | 26.7°C12 November 1999 | −24.4°C23 November 1985 | 98 / 98 |
| December | 5.2°C | −1.9°C | 21.7°C15 December 2025 | −28.3°C23 December 1983 | 98 / 98 |
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 98 to 99 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
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.