SAN LUIS VALLEY REGIONAL weather by month
Averages and records for each calendar month at SAN LUIS VALLEY REGIONAL, United States, from 1948 to 2026. The warmest month is July, averaging 28.2°C; the coolest is January at 1.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 1.5°C | −18.7°C | 17.2°C31 January 2018 | −45.6°C28 January 1948 | 79 / 79 |
| February | 5.0°C | −14.3°C | 19.4°C3 February 2025 | −37.2°C13 February 1948 | 79 / 79 |
| March | 10.2°C | −8.6°C | 28.3°C21 March 2026 | −28.9°C4 March 1964 | 79 / 79 |
| April | 15.3°C | −4.4°C | 26.7°C20 April 1989 | −21.1°C8 April 1973 | 79 / 79 |
| May | 20.4°C | 0.6°C | 32.2°C31 May 2002 | −11.7°C1 May 1967 | 79 / 79 |
| June | 26.2°C | 5.1°C | 35.0°C26 June 1994 | −4.4°C2 June 1990 | 79 / 79 |
| July | 28.2°C | 8.6°C | 35.6°C5 July 1989 | −2.1°C1 July 2020 | 79 / 79 |
| August | 26.8°C | 7.6°C | 33.9°C4 August 2026 | −1.7°C21 August 1964 | 79 / 79 |
| September | 23.4°C | 2.7°C | 31.7°C5 September 2020 | −9.4°C30 September 1985 | 78 / 79 |
| October | 17.2°C | −4.1°C | 27.2°C7 October 1979 | −22.8°C31 October 1991 | 78 / 78 |
| November | 8.9°C | −11.2°C | 21.7°C9 November 1980 | −34.4°C27 November 1952 | 78 / 78 |
| December | 2.5°C | −17.4°C | 17.2°C30 December 2017 | −41.1°C14 December 1964 | 78 / 78 |
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 78 to 79 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.