October
October · September · May
United States · 1991–2020
October leads for comfortable weather in Morrison: typically 22.6°C by day, 9.3°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.
October · September · May
August · June · July
October · April · November
The weakest month is January, scoring 10 against October’s 75 — days reach only 10.1°C, 14° below the 24°C the score treats as ideal, and nights drop to -0.4°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 | 10.1°C | -0.4°C | 116 mm | 9.1 | 9 h 59 | 10 | Strong coverage |
| February | 12.4°C | 1.1°C | 127 mm | 9.7 | 10 h 50 | 18 | Strong coverage |
| March | 17°C | 4.6°C | 133 mm | 10.5 | 11 h 51 | 38 | Strong coverage |
| April | 22.5°C | 8.9°C | 128 mm | 9.4 | 13 h 02 | 65 | Strong coverage |
| May | 26.1°C | 13.6°C | 120 mm | 10 | 14 h 01 | 72 | Strong coverage |
| June | 29.7°C | 17.8°C | 115 mm | 10.2 | 14 h 33 | 58 | Strong coverage |
| July | 31.2°C | 19.9°C | 122 mm | 10.3 | 14 h 21 | 49 | Strong coverage |
| August | 30.8°C | 19.2°C | 92 mm | 7.4 | 13 h 30 | 58 | Strong coverage |
| September | 27.9°C | 15.7°C | 99 mm | 6.9 | 12 h 21 | 73 | Strong coverage |
| October | 22.6°C | 9.3°C | 82 mm | 6.8 | 11 h 13 | 75 | Strong coverage |
| November | 16.4°C | 3.8°C | 108 mm | 7.5 | 10 h 14 | 41 | Strong coverage |
| December | 11.6°C | 1°C | 140 mm | 9.7 | 9 h 46 | 13 | 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 | 26.1°C24 Jan 1943 | -28.3°C26 Jan 1940 | 131 mm23 Jan 2002 | 384 mm1950 · driest 19 mm in 1986 | 130 |
| February | 27.2°C23 Feb 2023 | -32.2°C13 Feb 1899 | 110 mm6 Feb 2020 | 373 mm2019 · driest 12 mm in 1898 | 130 |
| March | 31.7°C28 Mar 1907 | -17.2°C3 Mar 1980 | 167 mm23 Mar 1929 | 430 mm1897 · driest 18 mm in 1910 | 130 |
| April | 35.0°C26 Apr 1915 | -6.7°C2 Apr 1924 | 126 mm4 Apr 1911 | 275 mm2011 · driest 0 mm in 1895 | 128 |
| May | 37.8°C29 May 1914 | -1.1°C1 May 1908 | 172 mm27 May 1973 | 362 mm2003 · driest 11 mm in 1941 | 128 |
| June | 41.1°C30 Jun 2012 | 3.3°C1 Jun 1966 | 136 mm14 Jun 1946 | 321 mm1905 · driest 3 mm in 1988 | 128 |
| July | 41.1°C28 Jul 1930 | 8.3°C15 Jul 1926 | 187 mm3 Jul 1936 | 267 mm1916 · driest 11 mm in 1993 | 127 |
| August | 41.1°C9 Aug 1930 | 6.1°C26 Aug 1917 | 94 mm30 Aug 1933 | 401 mm1901 · driest 5 mm in 1929 | 129 |
| September | 41.1°C6 Sep 1925 | 0.0°C30 Sep 1967 | 113 mm29 Sep 1944 | 268 mm1944 · driest 5 mm in 1897 | 129 |
| October | 35.6°C1 Oct 2019 | -6.7°C20 Oct 2022 | 114 mm18 Oct 1918 | 276 mm1925 · driest 0 mm in 1924 | 129 |
| November | 30.0°C1 Nov 2016 | -18.3°C25 Nov 1950 | 96 mm30 Nov 2016 | 270 mm1948 · driest 23 mm in 1924 | 128 |
| December | 25.0°C8 Dec 1956 | -23.3°C13 Dec 1962 | 153 mm22 Dec 1990 | 379 mm1990 · driest 22 mm in 2010 | 131 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 18 | 4 | 1 |
| February | <1 | 0 | 14 | 4 | 1 |
| March | 3 | 0 | 9 | 4 | <1 |
| April | 11 | <1 | 2 | 4 | 0 |
| May | 21 | 5 | 0 | 4 | 0 |
| June | 28 | 16 | 0 | 4 | 0 |
| July | 31 | 23 | 0 | 4 | 0 |
| August | 30 | 21 | 0 | 3 | 0 |
| September | 25 | 10 | 0 | 3 | 0 |
| October | 11 | 1 | 2 | 3 | 0 |
| November | 1 | 0 | 10 | 3 | 0 |
| December | 0 | 0 | 16 | 5 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 80); on 2011–2025 it is October (80). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 4% | 32% | 14% | 39% | 6.7–13.4°C |
| February | 8% | 34% | 14% | 42% | 8.2–15.6°C |
| March | 25% | 33% | 15% | 43% | 13.4–20.4°C |
| April | 50% | 30% | 13% | 36% | 19.8–24.5°C |
| May | 65% | 30% | 12% | 37% | 24.2–28.6°C |
| June | 70% | 30% | 12% | 37% | 28.0–32.1°C |
| July | 69% | 31% | 14% | 37% | 29.7–33.1°C |
| August | 74% | 26% | 11% | 27% | 29.6–32.7°C |
| September | 76% | 22% | 10% | 20% | 26.2–31.1°C |
| October | 63% | 20% | 9% | 18% | 20.8–25.6°C |
| November | 25% | 25% | 11% | 26% | 13.7–18.9°C |
| December | 5% | 30% | 14% | 36% | 7.8–14.4°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