La Grande/Union Cnty weather by month
Averages and records for each calendar month at La Grande/Union Cnty, United States, from 1949 to 2026. The warmest month is July, averaging 31.2°C; the coolest is January at 3.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.4°C | −4.3°C | 16.1°C9 January 1953 | −28.3°C31 January 1950 | 14 / 14 |
| February | 5.5°C | −3.8°C | 17.2°C8 February 2018 | −27.2°C1 February 1950 | 13 / 14 |
| March | 10.0°C | −2.0°C | 26.7°C20 March 2026 | −16.0°C5 March 2019 | 14 / 14 |
| April | 15.6°C | 0.3°C | 29.4°C25 April 1952 | −10.0°C21 April 1951 | 14 / 14 |
| May | 20.2°C | 4.5°C | 33.9°C30 May 2020 | −4.9°C1 May 2019 | 14 / 14 |
| June | 24.3°C | 7.4°C | 41.7°C29 June 2021 | −2.2°C30 June 1949 | 14 / 14 |
| July | 31.2°C | 10.2°C | 40.6°C30 July 2022 | 0.6°C6 July 1952 | 14 / 14 |
| August | 30.3°C | 9.6°C | 42.2°C10 August 2018 | 0.0°C24 August 1951 | 13 / 15 |
| September | 25.5°C | 5.2°C | 38.9°C2 September 2017 | −5.0°C13 September 1949 | 13 / 15 |
| October | 17.0°C | 1.0°C | 30.6°C2 October 1952 | −14.9°C30 October 2019 | 14 / 14 |
| November | 9.4°C | −1.2°C | 21.7°C4 November 2020 | −18.3°C28 November 1952 | 13 / 14 |
| December | 4.6°C | −2.7°C | 15.0°C11 December 2025 | −23.2°C24 December 2017 | 14 / 14 |
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 13 to 14 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.