Grants-Milan Muni weather by month
Averages and records for each calendar month at Grants-Milan Muni, United States, from 1997 to 2026. The warmest month is July, averaging 31.2°C; the coolest is December at 7.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 8.0°C | −9.7°C | 20.0°C16 January 2000 | −26.0°C1 January 2011 | 17 / 17 |
| February | 10.7°C | −7.5°C | 22.9°C3 February 2025 | −30.5°C3 February 2011 | 17 / 17 |
| March | 15.4°C | −4.8°C | 31.0°C21 March 2026 | −18.9°C3 March 2002 | 17 / 17 |
| April | 19.3°C | −1.2°C | 28.3°C27 April 2000 | −13.2°C11 April 2011 | 16 / 17 |
| May | 24.7°C | 3.2°C | 34.4°C29 May 2000 | −8.8°C3 May 2011 | 17 / 17 |
| June | 30.3°C | 8.1°C | 37.2°C29 June 1998 | −2.8°C5 June 1999 | 17 / 17 |
| July | 31.2°C | 12.7°C | 37.8°C14 July 2003 | 2.8°C2 July 2004 | 17 / 17 |
| August | 29.8°C | 11.5°C | 36.2°C1 August 2026 | 3.3°C18 August 2008 | 17 / 17 |
| September | 26.0°C | 6.8°C | 32.8°C3 September 2000 | −5.0°C25 September 2000 | 14 / 17 |
| October | 20.3°C | 0.1°C | 29.4°C1 October 2010 | −11.0°C30 October 2009 | 16 / 16 |
| November | 13.7°C | −6.2°C | 25.7°C3 November 2025 | −25.5°C30 November 2006 | 16 / 17 |
| December | 7.7°C | −10.0°C | 21.4°C19 December 2025 | −26.0°C24 December 2011 | 15 / 16 |
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 14 to 17 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.