April
April · October · March
United States · 1991–2020
April leads for comfortable weather in Allendale: typically 25.5°C by day, 12.1°C at night, with 137 mm of rain. Based on measured 1991–2020 NOAA station history.
April · October · March
May · September · August
November · March · February
The weakest month is January, scoring 31 against April’s 73 — days reach only 15.5°C, 8° below the 24°C the score treats as ideal, and nights drop to 3°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 | 15.5°C | 3°C | 141 mm | 8.6 | 10 h 20 | 31 | Strong coverage |
| February | 17.9°C | 5.1°C | 117 mm | 8.3 | 11 h 02 | 46 | Strong coverage |
| March | 22.1°C | 8.9°C | 140 mm | 7.6 | 11 h 54 | 64 | Strong coverage |
| April | 25.5°C | 12.1°C | 137 mm | 6.5 | 12 h 53 | 73 | Strong coverage |
| May | 29.4°C | 16.8°C | 119 mm | 6.9 | 13 h 43 | 64 | Strong coverage |
| June | 32.5°C | 20.2°C | 121 mm | 9.2 | 14 h 09 | 45 | Strong coverage |
| July | 33.9°C | 21.5°C | 107 mm | 8.5 | 13 h 59 | 41 | Strong coverage |
| August | 34.2°C | 21.1°C | 107 mm | 8.1 | 13 h 17 | 41 | Strong coverage |
| September | 31.5°C | 18.1°C | 109 mm | 6.5 | 12 h 19 | 56 | Strong coverage |
| October | 26.7°C | 12.1°C | 129 mm | 6.2 | 11 h 21 | 70 | Strong coverage |
| November | 20.7°C | 7.1°C | 135 mm | 7 | 10 h 32 | 57 | Strong coverage |
| December | 16.5°C | 4°C | 143 mm | 8.7 | 10 h 08 | 35 | 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 | 28.9°C30 Jan 1911 | -17.2°C25 Jan 1948 | 121 mm27 Jan 1994 | 349 mm1990 · driest 14 mm in 2009 | 103 |
| February | 31.1°C28 Feb 1940 | -15.0°C1 Feb 1949 | 279 mm10 Feb 1966 | 397 mm2018 · driest 13 mm in 1954 | 104 |
| March | 33.3°C30 Mar 1946 | -8.3°C4 Mar 2002 | 317 mm21 Mar 2012 | 513 mm2012 · driest 17 mm in 2013 | 105 |
| April | 33.9°C19 Apr 2006 | -1.7°C2 Apr 2019 | 215 mm29 Apr 1953 | 398 mm2024 · driest 3 mm in 1965 | 105 |
| May | 37.2°C31 May 1998 | 1.1°C4 May 2013 | 206 mm18 May 1953 | 529 mm1953 · driest 1 mm in 1998 | 104 |
| June | 40.0°C20 Jun 1936 | 8.9°C1 Jun 1984 | 153 mm7 Jun 2001 | 445 mm1989 · driest 3 mm in 1931 | 104 |
| July | 42.2°C31 Jul 2023 | 11.7°C15 Jul 1967 | 164 mm2 Jul 1936 | 294 mm1955 · driest 19 mm in 2000 | 105 |
| August | 43.3°C24 Aug 2023 | 10.6°C23 Aug 1956 | 193 mm8 Aug 1940 | 492 mm2017 · driest 0 mm in 1980 | 105 |
| September | 42.8°C1 Sep 2000 | 1.7°C29 Sep 1967 | 175 mm12 Sep 1998 | 316 mm1998 · driest 0 mm in 1922 | 104 |
| October | 36.7°C6 Oct 2019 | -4.4°C29 Oct 1952 | 160 mm26 Oct 2002 | 448 mm2009 · driest 0 mm in 1924 | 104 |
| November | 32.2°C8 Nov 2022 | -9.4°C19 Nov 1903 | 177 mm19 Nov 1948 | 470 mm2004 · driest 0 mm in 1967 | 103 |
| December | 31.1°C7 Dec 1924 | -14.4°C23 Dec 1989 | 185 mm27 Dec 1982 | 585 mm1982 · driest 24 mm in 1958 | 103 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 1 | 0 | 12 | 4 |
| February | 3 | <1 | 7 | 4 |
| March | 12 | <1 | 3 | 4 |
| April | 19 | 3 | <1 | 3 |
| May | 28 | 16 | 0 | 3 |
| June | 30 | 26 | 0 | 4 |
| July | 31 | 29 | 0 | 3 |
| August | 31 | 29 | 0 | 4 |
| September | 28 | 22 | 0 | 3 |
| October | 22 | 9 | <1 | 3 |
| November | 7 | <1 | 5 | 3 |
| December | 3 | 0 | 10 | 4 |
The best month has moved. On the 1961–1990 numbers the strongest month here was April (scoring 81); on 2011–2025 it is October (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 | 23% | 28% | 13% | 30% | 12.5–19.2°C |
| February | 36% | 26% | 12% | 28% | 14.8–21.4°C |
| March | 56% | 24% | 12% | 22% | 19.7–24.7°C |
| April | 74% | 21% | 11% | 19% | 24.0–27.7°C |
| May | 76% | 23% | 12% | 24% | 28.0–30.5°C |
| June | 74% | 26% | 12% | 31% | 31.0–34.3°C |
| July | 73% | 28% | 12% | 32% | 32.4–35.4°C |
| August | 76% | 24% | 10% | 25% | 32.3–36.1°C |
| September | 78% | 22% | 10% | 21% | 29.8–33.4°C |
| October | 78% | 17% | 8% | 16% | 25.0–29.0°C |
| November | 51% | 22% | 12% | 21% | 18.2–23.5°C |
| December | 26% | 26% | 14% | 31% | 15.1–19.7°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