April
April · October · March
United States · 1991–2020
April leads for comfortable weather in Impact: typically 25.5°C by day, 11.3°C at night, with 47 mm of rain. Based on measured 1991–2020 NOAA station history.
April · October · March
September · June · May
March · November · April
The weakest month is January, scoring 42 against April’s 86 — days reach only 14.2°C, 10° below the 24°C the score treats as ideal, and nights drop to 0.8°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 | 14.2°C | 0.8°C | 28 mm | 3.3 | 10 h 14 | 42 | Strong coverage |
| February | 16.4°C | 2.8°C | 33 mm | 3.7 | 10 h 59 | 52 | Strong coverage |
| March | 20.9°C | 7.2°C | 44 mm | 4 | 11 h 53 | 74 | Strong coverage |
| April | 25.5°C | 11.3°C | 47 mm | 3.9 | 12 h 56 | 86 | Strong coverage |
| May | 29.5°C | 16.4°C | 82 mm | 6.5 | 13 h 48 | 70 | Strong coverage |
| June | 33.1°C | 20.6°C | 87 mm | 5.7 | 14 h 16 | 50 | Strong coverage |
| July | 35.1°C | 22.6°C | 49 mm | 3.6 | 14 h 05 | 47 | Strong coverage |
| August | 34.8°C | 22.2°C | 64 mm | 4.7 | 13 h 21 | 46 | Strong coverage |
| September | 30.8°C | 18.1°C | 68 mm | 4.7 | 12 h 20 | 66 | Strong coverage |
| October | 25.6°C | 12.4°C | 72 mm | 5.1 | 11 h 19 | 83 | Strong coverage |
| November | 19.2°C | 6.1°C | 36 mm | 3.2 | 10 h 27 | 68 | Strong coverage |
| December | 14.6°C | 1.6°C | 32 mm | 3.4 | 10 h 01 | 44 | 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 | 31.1°C8 Jan 1969 | -18.3°C12 Jan 1973 | 67 mm28 Jan 2010 | 111 mm1968 · driest 0 mm in 2014 | 79 |
| February | 34.4°C26 Feb 2024 | -21.7°C2 Feb 1985 | 45 mm24 Feb 1992 | 92 mm1992 · driest 0 mm in 1999 | 79 |
| March | 36.7°C22 Mar 2026 | -12.8°C11 Mar 1948 | 65 mm4 Mar 2020 | 131 mm1979 · driest 1 mm in 1963 | 79 |
| April | 40.0°C25 Apr 2012 | -3.9°C9 Apr 1973 | 84 mm28 Apr 2021 | 173 mm1966 · driest 0 mm in 1961 | 79 |
| May | 42.8°C28 May 2011 | 0.6°C3 May 2013 | 120 mm2 May 1990 | 335 mm1957 · driest 4 mm in 1956 | 79 |
| June | 42.8°C27 Jun 1994 | 8.3°C1 Jun 1964 | 94 mm5 Jun 2026 | 244 mm1961 · driest 0 mm in 1994 | 79 |
| July | 43.3°C18 Jul 2022 | 13.9°C14 Jul 1990 | 210 mm7 Jul 2015 | 211 mm2015 · driest 0 mm in 2011 | 79 |
| August | 45.0°C21 Aug 2024 | 10.0°C28 Aug 1992 | 160 mm3 Aug 1978 | 208 mm1969 · driest 0 mm in 2000 | 78 |
| September | 42.2°C8 Sep 2023 | 3.3°C24 Sep 1989 | 114 mm3 Sep 1961 | 280 mm1974 · driest 0 mm in 1956 | 78 |
| October | 39.4°C1 Oct 1979 | -6.6°C31 Oct 2019 | 127 mm3 Oct 1959 | 307 mm2018 · driest 0 mm in 1952 | 78 |
| November | 33.9°C8 Nov 2023 | -10.0°C14 Nov 1976 | 62 mm2 Nov 1975 | 132 mm2024 · driest 0 mm in 1949 | 78 |
| December | 32.2°C26 Dec 2021 | -21.7°C23 Dec 1989 | 55 mm25 Dec 1987 | 160 mm1991 · driest 0 mm in 1972 | 78 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 1 | <1 | 15 | <1 | <1 |
| February | 4 | <1 | 9 | 1 | <1 |
| March | 9 | 2 | 4 | 1 | <1 |
| April | 18 | 7 | <1 | 2 | 0 |
| May | 26 | 16 | 0 | 3 | 0 |
| June | 30 | 25 | 0 | 3 | 0 |
| July | 31 | 30 | 0 | 1 | 0 |
| August | 31 | 28 | 0 | 2 | 0 |
| September | 27 | 19 | 0 | 2 | 0 |
| October | 19 | 8 | <1 | 2 | <1 |
| November | 6 | <1 | 5 | 1 | <1 |
| December | 1 | 0 | 13 | 1 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 21% | 10% | 3% | 6% | 10.0–16.7°C |
| February | 33% | 13% | 4% | 8% | 12.8–20.3°C |
| March | 56% | 12% | 4% | 7% | 17.5–23.4°C |
| April | 74% | 15% | 6% | 12% | 23.1–28.3°C |
| May | 78% | 20% | 9% | 21% | 27.0–31.6°C |
| June | 83% | 17% | 9% | 13% | 30.9–35.4°C |
| July | 88% | 12% | 5% | 7% | 32.7–37.1°C |
| August | 86% | 14% | 6% | 11% | 32.5–37.2°C |
| September | 83% | 16% | 7% | 14% | 28.7–33.6°C |
| October | 76% | 15% | 6% | 13% | 22.7–28.2°C |
| November | 47% | 11% | 4% | 7% | 16.5–21.8°C |
| December | 24% | 10% | 3% | 6% | 12.0–16.9°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