Klamath Falls Intl climate by month
Averages and records for each calendar month at Klamath Falls Intl, United States, from 1959 to 2026. The warmest month is July, averaging 29.8°C; the coolest is December at 4.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.7°C | −5.6°C | 19.4°C29 January 2024 | −31.7°C23 January 1962 | 40 / 40 |
| February | 7.0°C | −4.4°C | 18.9°C25 February 2014 | −25.5°C12 February 2025 | 40 / 40 |
| March | 10.4°C | −2.9°C | 25.0°C18 March 2026 | −16.6°C2 March 2012 | 40 / 40 |
| April | 13.7°C | −1.5°C | 28.9°C28 April 2023 | −11.0°C5 April 2010 | 40 / 40 |
| May | 18.9°C | 2.5°C | 32.8°C17 May 2008 | −8.2°C1 May 2008 | 40 / 40 |
| June | 24.2°C | 6.1°C | 39.4°C28 June 2021 | −5.0°C4 June 2001 | 40 / 40 |
| July | 29.8°C | 9.4°C | 39.4°C29 July 2022 | −1.1°C3 July 1966 | 40 / 40 |
| August | 28.6°C | 8.4°C | 37.8°C3 August 1961 | −1.1°C27 August 1960 | 39 / 39 |
| September | 24.5°C | 4.6°C | 37.8°C3 September 1998 | −6.1°C21 September 1968 | 39 / 40 |
| October | 17.3°C | −0.1°C | 31.1°C1 October 2010 | −13.3°C31 October 2002 | 39 / 39 |
| November | 9.1°C | −3.2°C | 22.2°C2 November 2020 | −19.9°C24 November 2010 | 41 / 41 |
| December | 4.1°C | −5.8°C | 15.0°C14 December 1962 | −28.8°C8 December 2013 | 41 / 41 |
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 39 to 41 years each.
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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.