April
April · October · March
United States · 1991–2020
April leads for comfortable weather in Johnson: typically 26.2°C by day, 4.9°C at night, with 6 mm of rain. Based on measured 1991–2020 NOAA station history.
April · October · March
September · August · May
November · March · February
The weakest month is December, scoring 40 against April’s 74 — nights drop to -2.5°C, and days reach only 15.8°C, 8° 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 | 16.5°C | -2.3°C | 26 mm | 3.8 | 10 h 15 | 43 | Strong coverage |
| February | 18.4°C | -0.5°C | 25 mm | 3.6 | 11 h | 53 | Strong coverage |
| March | 22.2°C | 1.9°C | 16 mm | 2.4 | 11 h 53 | 71 | Strong coverage |
| April | 26.2°C | 4.9°C | 6 mm | 1.3 | 12 h 55 | 74 | Strong coverage |
| May | 30.7°C | 9.3°C | 9 mm | 1.2 | 13 h 47 | 68 | Strong coverage |
| June | 36°C | 14.4°C | 11 mm | 1.7 | 14 h 14 | 59 | Strong coverage |
| July | 35.9°C | 18.4°C | 67 mm | 8 | 14 h 04 | 46 | Strong coverage |
| August | 34.6°C | 17.8°C | 66 mm | 8.1 | 13 h 19 | 51 | Strong coverage |
| September | 32.7°C | 13.8°C | 31 mm | 4.3 | 12 h 20 | 68 | Strong coverage |
| October | 27.8°C | 6.8°C | 17 mm | 2.6 | 11 h 20 | 73 | Strong coverage |
| November | 21.4°C | 0.9°C | 17 mm | 2.4 | 10 h 28 | 66 | Strong coverage |
| December | 15.8°C | -2.5°C | 27 mm | 4.3 | 10 h 03 | 40 | 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 | 29.4°C31 Jan 2024 | -18.3°C15 Jan 1962 | 47 mm9 Jan 1905 | 156 mm1993 · driest 0 mm in 1913 | 120 |
| February | 31.1°C14 Feb 1957 | -16.7°C21 Feb 1971 | 38 mm14 Feb 1980 | 100 mm1905 · driest 0 mm in 1974 | 118 |
| March | 36.7°C22 Mar 2026 | -14.4°C9 Mar 1964 | 38 mm16 Mar 1905 | 127 mm1905 · driest 0 mm in 1928 | 121 |
| April | 37.2°C29 Apr 2020 | -12.8°C17 Apr 1971 | 27 mm28 Apr 1931 | 56 mm2004 · driest 0 mm in 1909 | 122 |
| May | 40.6°C27 May 1951 | -7.8°C2 May 1967 | 36 mm20 May 1997 | 62 mm1992 · driest 0 mm in 1999 | 119 |
| June | 44.4°C20 Jun 2016 | -2.8°C5 Jun 1971 | 44 mm2 Jun 1952 | 52 mm1920 · driest 0 mm in 1913 | 119 |
| July | 43.3°C6 Jul 1905 | 5.6°C28 Jul 1913 | 58 mm21 Jul 1954 | 143 mm1999 · driest 4 mm in 1935 | 118 |
| August | 42.8°C7 Aug 2025 | 5.0°C18 Aug 1938 | 93 mm14 Aug 1980 | 197 mm1906 · driest 3 mm in 1975 | 118 |
| September | 40.6°C4 Sep 1929 | -1.1°C21 Sep 1965 | 54 mm28 Sep 1941 | 114 mm1975 · driest 0 mm in 1956 | 118 |
| October | 38.3°C1 Oct 2010 | -9.4°C27 Oct 1970 | 64 mm5 Oct 1989 | 170 mm2000 · driest 0 mm in 1973 | 119 |
| November | 32.8°C4 Nov 1916 | -13.3°C19 Nov 1921 | 41 mm28 Nov 2019 | 107 mm2019 · driest 0 mm in 1950 | 116 |
| December | 27.2°C10 Dec 1915 | -21.7°C8 Dec 1978 | 36 mm22 Dec 1965 | 144 mm1914 · driest 0 mm in 2024 | 119 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | <1 | 0 | 23 | <1 | <1 |
| February | 2 | 0 | 17 | <1 | <1 |
| March | 10 | <1 | 10 | <1 | <1 |
| April | 19 | 6 | 3 | <1 | 0 |
| May | 28 | 19 | <1 | <1 | 0 |
| June | 29 | 28 | 0 | <1 | 0 |
| July | 29 | 29 | 0 | 2 | 0 |
| August | 30 | 28 | 0 | 2 | 0 |
| September | 29 | 25 | 0 | <1 | 0 |
| October | 23 | 11 | 1 | <1 | 0 |
| November | 7 | <1 | 14 | <1 | <1 |
| December | <1 | 0 | 24 | <1 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was October (scoring 76); on 2011–2025 it is April (74). 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 | 16% | 12% | 2% | 9% | 12.1–18.5°C |
| February | 34% | 12% | 2% | 9% | 14.7–20.4°C |
| March | 60% | 9% | 1% | 5% | 17.9–23.9°C |
| April | 87% | 4% | <1% | 1% | 22.8–27.7°C |
| May | 95% | 3% | <1% | 1% | 27.7–32.0°C |
| June | 94% | 5% | <1% | 5% | 32.8–37.1°C |
| July | 74% | 26% | 7% | 33% | 32.8–36.8°C |
| August | 75% | 25% | 7% | 23% | 30.9–35.6°C |
| September | 86% | 14% | 3% | 11% | 29.2–33.9°C |
| October | 88% | 8% | 2% | 5% | 24.1–29.0°C |
| November | 56% | 8% | 2% | 5% | 17.0–23.5°C |
| December | 18% | 12% | 3% | 9% | 12.5–18.6°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