September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Codell: typically 27.5°C by day, 12.3°C at night, with 57 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
June · August · September
October · April · May
The weakest month is January, scoring 5 against September’s 79 — days reach only 5.2°C, 19° below the 24°C the score treats as ideal, and nights drop to -8.5°C.
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 | 5.2°C | -8.5°C | 17 mm | 2.3 | 9 h 41 | 5 | Strong coverage |
| February | 7.3°C | -7.1°C | 20 mm | 2.9 | 10 h 40 | 5 | Strong coverage |
| March | 13.6°C | -2.2°C | 36 mm | 4.1 | 11 h 50 | 34 | Strong coverage |
| April | 18.6°C | 2.9°C | 55 mm | 5.8 | 13 h 10 | 55 | Strong coverage |
| May | 23.7°C | 9.2°C | 103 mm | 7.8 | 14 h 18 | 75 | Strong coverage |
| June | 30.1°C | 15.2°C | 88 mm | 7.5 | 14 h 54 | 68 | Strong coverage |
| July | 33°C | 18.3°C | 101 mm | 7.2 | 14 h 40 | 51 | Strong coverage |
| August | 31.7°C | 17.3°C | 94 mm | 7 | 13 h 42 | 59 | Strong coverage |
| September | 27.5°C | 12.3°C | 57 mm | 4.7 | 12 h 24 | 79 | Strong coverage |
| October | 20.4°C | 4.8°C | 43 mm | 4.3 | 11 h 06 | 67 | Strong coverage |
| November | 12.6°C | -2°C | 29 mm | 3.3 | 9 h 58 | 32 | Strong coverage |
| December | 6°C | -6.9°C | 24 mm | 2.7 | 9 h 25 | 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 | 28.3°C28 Jan 2015 | -29.4°C11 Jan 1918 | 33 mm27 Jan 1995 | 57 mm1932 · driest 0 mm in 1997 | 114 |
| February | 30.6°C19 Feb 2016 | -28.3°C16 Feb 2021 | 45 mm20 Feb 1954 | 72 mm1919 · driest 0 mm in 2006 | 115 |
| March | 38.3°C22 Mar 2026 | -29.4°C11 Mar 1948 | 85 mm23 Mar 1987 | 251 mm1973 · driest 0 mm in 1910 | 115 |
| April | 38.9°C23 Apr 1989 | -15.0°C2 Apr 1936 | 111 mm17 Apr 2016 | 188 mm2016 · driest 2 mm in 2023 | 114 |
| May | 39.4°C30 May 1934 | -3.9°C3 May 1907 | 109 mm24 May 2016 | 292 mm1995 · driest 3 mm in 1966 | 114 |
| June | 45.6°C28 Jun 2012 | 3.3°C2 Jun 1969 | 119 mm17 Jun 1957 | 369 mm1957 · driest 4 mm in 1952 | 114 |
| July | 46.7°C24 Jul 1936 | 7.2°C21 Jul 1970 | 100 mm29 Jul 1928 | 456 mm1993 · driest 2 mm in 2003 | 113 |
| August | 45.0°C9 Aug 1937 | 3.3°C24 Aug 1928 | 98 mm7 Aug 2008 | 260 mm2019 · driest 7 mm in 2000 | 111 |
| September | 44.4°C3 Sep 1947 | -3.3°C30 Sep 1920 | 152 mm12 Sep 1961 | 234 mm1973 · driest 1 mm in 1974 | 113 |
| October | 37.8°C5 Oct 1947 | -14.4°C26 Oct 1997 | 61 mm2 Oct 1950 | 187 mm2008 · driest 0 mm in 1933 | 111 |
| November | 31.1°C1 Nov 2016 | -22.2°C14 Nov 1940 | 78 mm16 Nov 1996 | 116 mm2024 · driest 0 mm in 1921 | 112 |
| December | 28.3°C6 Dec 1939 | -33.9°C23 Dec 1989 | 69 mm14 Dec 2015 | 99 mm2006 · driest 0 mm in 1938 | 111 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 2 |
| February | <1 | 0 | 26 | <1 | 3 |
| March | 2 | <1 | 19 | 1 | 2 |
| April | 6 | 1 | 8 | 2 | <1 |
| May | 14 | 6 | <1 | 4 | <1 |
| June | 25 | 16 | 0 | 3 | 0 |
| July | 28 | 23 | 0 | 3 | 0 |
| August | 28 | 21 | 0 | 3 | 0 |
| September | 21 | 12 | <1 | 2 | 0 |
| October | 9 | 2 | 5 | 1 | <1 |
| November | 1 | <1 | 20 | <1 | 1 |
| December | 0 | 0 | 29 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 2% | 9% | 1% | 4% | 0.3–8.9°C |
| February | 7% | 12% | 2% | 7% | 2.8–12.6°C |
| March | 23% | 15% | 4% | 10% | 8.1–17.9°C |
| April | 44% | 19% | 6% | 17% | 16.3–21.8°C |
| May | 60% | 26% | 10% | 29% | 21.3–26.5°C |
| June | 72% | 27% | 10% | 29% | 26.8–33.1°C |
| July | 78% | 22% | 9% | 18% | 30.7–36.2°C |
| August | 80% | 20% | 8% | 17% | 29.6–35.4°C |
| September | 78% | 16% | 7% | 12% | 25.3–31.1°C |
| October | 58% | 12% | 4% | 9% | 17.7–24.5°C |
| November | 17% | 11% | 3% | 7% | 9.4–16.0°C |
| December | 2% | 9% | 2% | 4% | 2.6–9.5°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