September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Utah: typically 24.7°C by day, 13°C at night, with 98 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · June
October · September · May
The weakest month is January, scoring 5 against September’s 83 — days reach only -0.9°C, 25° below the 24°C the score treats as ideal.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -0.9°C | -9.5°C | 43 mm | 6.4 | 9 h 32 | 5 | Strong coverage |
| February | 1.8°C | -7.4°C | 47 mm | 5.8 | 10 h 34 | 5 | Strong coverage |
| March | 9.2°C | -1.6°C | 60 mm | 7.4 | 11 h 49 | 14 | Strong coverage |
| April | 16.6°C | 4.6°C | 97 mm | 9.1 | 13 h 15 | 42 | Strong coverage |
| May | 22.5°C | 11.1°C | 134 mm | 10.5 | 14 h 27 | 67 | Strong coverage |
| June | 27.5°C | 16.7°C | 117 mm | 8.7 | 15 h 06 | 69 | Strong coverage |
| July | 29°C | 18.7°C | 103 mm | 7.2 | 14 h 51 | 63 | Strong coverage |
| August | 28.1°C | 17.5°C | 99 mm | 7.3 | 13 h 48 | 69 | Strong coverage |
| September | 24.7°C | 13°C | 98 mm | 6 | 12 h 25 | 83 | Strong coverage |
| October | 17.4°C | 6.1°C | 71 mm | 7.3 | 11 h 02 | 53 | Strong coverage |
| November | 9.1°C | -0.6°C | 66 mm | 6.4 | 9 h 50 | 15 | Strong coverage |
| December | 2°C | -6.1°C | 54 mm | 6.6 | 9 h 14 | 5 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.0°C24 Jan 1950 | -32.8°C16 Jan 2009 | 55 mm1 Jan 1965 | 136 mm1965 · driest 2 mm in 1981 | 100 |
| February | 23.3°C28 Feb 2024 | -33.3°C13 Feb 1905 | 70 mm21 Feb 1997 | 122 mm1997 · driest 0 mm in 1987 | 102 |
| March | 30.0°C29 Mar 1986 | -25.6°C5 Mar 1960 | 104 mm25 Mar 1954 | 190 mm1985 · driest 4 mm in 1956 | 102 |
| April | 32.8°C29 Apr 1952 | -12.8°C2 Apr 1899 | 106 mm18 Apr 2013 | 209 mm2013 · driest 7 mm in 1907 | 104 |
| May | 35.6°C28 May 2018 | -4.4°C1 May 1903 | 92 mm16 May 2009 | 330 mm2019 · driest 11 mm in 1992 | 101 |
| June | 38.9°C29 Jun 1936 | 2.2°C12 Jun 1903 | 104 mm14 Jun 1970 | 337 mm2010 · driest 11 mm in 1900 | 101 |
| July | 44.4°C15 Jul 1936 | 5.6°C1 Jul 1899 | 156 mm24 Jul 1993 | 323 mm1982 · driest 14 mm in 1936 | 104 |
| August | 38.9°C18 Aug 1936 | 5.0°C24 Aug 1908 | 137 mm16 Aug 1898 | 272 mm1977 · driest 6 mm in 2013 | 102 |
| September | 37.8°C5 Sep 1899 | -7.2°C30 Sep 1899 | 125 mm13 Sep 1961 | 294 mm1970 · driest 8 mm in 2002 | 103 |
| October | 34.4°C3 Oct 2006 | -8.3°C17 Oct 2001 | 106 mm3 Oct 1941 | 421 mm1941 · driest 1 mm in 1964 | 102 |
| November | 26.1°C1 Nov 1950 | -21.1°C27 Nov 1898 | 66 mm19 Nov 1954 | 183 mm1985 · driest 4 mm in 1999 | 103 |
| December | 22.2°C16 Dec 2021 | -30.0°C21 Dec 1963 | 83 mm9 Dec 2003 | 137 mm1982 · driest 7 mm in 1955 | 100 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | 1 | 5 |
| February | 0 | 0 | 25 | 1 | 3 |
| March | <1 | 0 | 20 | 2 | 2 |
| April | 4 | <1 | 6 | 4 | <1 |
| May | 12 | 3 | <1 | 4 | 0 |
| June | 23 | 9 | 0 | 4 | 0 |
| July | 28 | 13 | 0 | 3 | 0 |
| August | 26 | 10 | 0 | 3 | 0 |
| September | 15 | 5 | 0 | 3 | 0 |
| October | 4 | <1 | 4 | 2 | <1 |
| November | 0 | 0 | 17 | 2 | <1 |
| December | 0 | 0 | 26 | 2 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 19% | 4% | 14% | -4.5–2.8°C |
| February | <1% | 19% | 5% | 14% | -2.4–5.6°C |
| March | 6% | 25% | 8% | 26% | 4.4–12.4°C |
| April | 23% | 29% | 11% | 34% | 13.4–19.3°C |
| May | 50% | 31% | 12% | 37% | 20.0–25.0°C |
| June | 70% | 28% | 13% | 30% | 25.3–29.4°C |
| July | 75% | 25% | 11% | 22% | 27.6–31.6°C |
| August | 78% | 22% | 10% | 20% | 26.4–30.5°C |
| September | 67% | 22% | 10% | 20% | 22.6–27.0°C |
| October | 35% | 21% | 7% | 22% | 15.9–21.4°C |
| November | 6% | 21% | 8% | 19% | 5.8–12.1°C |
| December | <1% | 20% | 5% | 18% | -1.7–5.2°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page