Twin Falls weather by month
Measured at Twin Falls/Joslin Fld
Averages and records for each calendar month at Twin Falls/Joslin Fld, United States, from 1997 to 2026. The warmest month is July, averaging 32.7°C; the coolest is January at 3.2°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.2°C | −5.4°C | 16.1°C31 January 2003 | −26.0°C1 January 2016 | 29 / 29 |
| February | 5.9°C | −3.8°C | 18.3°C8 February 2015 | −20.0°C13 February 2004 | 29 / 29 |
| March | 11.6°C | −0.6°C | 26.7°C20 March 2026 | −12.7°C10 March 2022 | 29 / 29 |
| April | 15.5°C | 1.8°C | 32.2°C23 April 2012 | −7.1°C1 April 2008 | 29 / 29 |
| May | 20.8°C | 6.2°C | 37.8°C28 May 2003 | −4.4°C8 May 2002 | 29 / 29 |
| June | 26.6°C | 10.6°C | 39.4°C29 June 2013 | 1.1°C9 June 1999 | 29 / 30 |
| July | 32.7°C | 15.6°C | 41.7°C23 July 2003 | 5.0°C13 July 1997 | 30 / 30 |
| August | 31.0°C | 14.3°C | 39.4°C2 August 2024 | 3.3°C31 August 1999 | 30 / 30 |
| September | 25.6°C | 9.3°C | 38.9°C6 September 2022 | −4.4°C28 September 1999 | 28 / 30 |
| October | 17.4°C | 3.3°C | 33.3°C10 October 2015 | −15.6°C31 October 2002 | 29 / 29 |
| November | 9.5°C | −2.4°C | 24.4°C7 November 2006 | −20.5°C27 November 2015 | 29 / 29 |
| December | 3.6°C | −5.6°C | 17.2°C10 December 2025 | −24.3°C31 December 2015 | 29 / 29 |
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 28 to 30 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.