April
April · May · October
United States · 1991–2020
April leads for comfortable weather in Hamilton City: typically 23°C by day, 8.4°C at night, with 35 mm of rain. Based on measured 1991–2020 NOAA station history.
April · May · October
June · July · August
April · November · March
The weakest month is January, scoring 27 against April’s 84 — days reach only 13.9°C, 10° below the 24°C the score treats as ideal, and nights drop to 3.5°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 | 13.9°C | 3.5°C | 127 mm | 10.2 | 9 h 38 | 27 | Strong coverage |
| February | 16.7°C | 4.9°C | 107 mm | 8.2 | 10 h 38 | 43 | Strong coverage |
| March | 19.6°C | 6.4°C | 79 mm | 8 | 11 h 49 | 59 | Strong coverage |
| April | 23°C | 8.4°C | 35 mm | 4.4 | 13 h 12 | 84 | Strong coverage |
| May | 27.4°C | 12.1°C | 27 mm | 3.1 | 14 h 21 | 84 | Strong coverage |
| June | 31.8°C | 16°C | 8 mm | 1.2 | 14 h 58 | 72 | Strong coverage |
| July | 34.6°C | 17.7°C | 0 mm | 0.1 | 14 h 43 | 60 | Strong coverage |
| August | 34.1°C | 16.5°C | 2 mm | 0.3 | 13 h 44 | 64 | Strong coverage |
| September | 32.3°C | 14.6°C | 6 mm | 0.8 | 12 h 24 | 72 | Strong coverage |
| October | 26.5°C | 10.8°C | 23 mm | 2.7 | 11 h 05 | 84 | Strong coverage |
| November | 18.6°C | 6.2°C | 59 mm | 6.1 | 9 h 56 | 60 | Strong coverage |
| December | 13.7°C | 3.3°C | 106 mm | 8.9 | 9 h 22 | 30 | 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 | 27.2°C16 Jan 2014 | -8.3°C9 Jan 1937 | 81 mm26 Jan 2008 | 441 mm1995 · driest 0 mm in 2014 | 122 |
| February | 28.9°C11 Feb 2022 | -7.2°C2 Feb 1949 | 111 mm3 Feb 1998 | 458 mm1998 · driest 0 mm in 2022 | 120 |
| March | 31.7°C23 Mar 2022 | -4.4°C1 Mar 1939 | 96 mm9 Mar 1995 | 295 mm1949 · driest 0 mm in 1956 | 122 |
| April | 36.7°C21 Apr 1931 | -2.8°C8 Apr 2001 | 48 mm3 Apr 1936 | 137 mm2006 · driest 0 mm in 1909 | 122 |
| May | 43.3°C30 May 1950 | -0.6°C1 May 2010 | 45 mm19 May 2019 | 118 mm1998 · driest 0 mm in 1937 | 121 |
| June | 46.1°C30 Jun 1934 | 5.0°C14 Jun 1907 | 45 mm4 Jun 1993 | 46 mm1993 · driest 0 mm in 2010 | 120 |
| July | 48.9°C8 Jul 1905 | 7.2°C27 Jul 1905 | 19 mm8 Jul 1974 | 34 mm1974 · driest 0 mm in 1947 | 121 |
| August | 48.9°C7 Aug 1908 | 6.1°C3 Aug 1905 | 45 mm21 Aug 1968 | 48 mm1968 · driest 0 mm in 1969 | 121 |
| September | 45.6°C4 Sep 1988 | 3.9°C30 Sep 1971 | 78 mm5 Sep 1912 | 97 mm1912 · driest 0 mm in 1914 | 121 |
| October | 40.6°C3 Oct 1933 | -1.7°C29 Oct 1946 | 54 mm12 Oct 1962 | 133 mm1957 · driest 0 mm in 1976 | 118 |
| November | 35.0°C7 Nov 1908 | -6.1°C21 Nov 1985 | 86 mm21 Nov 2024 | 213 mm1983 · driest 0 mm in 1929 | 118 |
| December | 27.2°C16 Dec 1980 | -9.4°C23 Dec 1990 | 79 mm29 Dec 1933 | 304 mm1952 · driest 0 mm in 1956 | 119 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | <1 | 0 | 5 | 4 |
| February | <1 | 0 | 2 | 3 |
| March | 5 | <1 | <1 | 2 |
| April | 11 | 3 | <1 | <1 |
| May | 21 | 10 | 0 | <1 |
| June | 27 | 20 | 0 | <1 |
| July | 31 | 29 | 0 | 0 |
| August | 31 | 28 | 0 | <1 |
| September | 28 | 22 | 0 | <1 |
| October | 20 | 8 | 0 | <1 |
| November | 4 | <1 | 1 | 2 |
| December | 0 | 0 | 6 | 3 |
The best month has moved. On the 1961–1990 numbers the strongest month here was October (scoring 83); on 2011–2025 it is April (89). 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 | 5% | 28% | 11% | 35% | 10.3–15.3°C |
| February | 17% | 26% | 11% | 30% | 13.4–18.3°C |
| March | 38% | 23% | 8% | 24% | 15.7–21.9°C |
| April | 67% | 15% | 3% | 12% | 20.2–25.9°C |
| May | 87% | 9% | 2% | 6% | 25.0–30.3°C |
| June | 95% | 5% | 1% | 1% | 30.0–34.8°C |
| July | 99% | <1% | <1% | 0% | 33.7–38.0°C |
| August | 99% | 1% | <1% | <1% | 32.8–37.5°C |
| September | 96% | 4% | 1% | 2% | 29.7–34.0°C |
| October | 83% | 10% | 3% | 8% | 23.5–28.9°C |
| November | 35% | 19% | 7% | 22% | 15.5–21.4°C |
| December | 5% | 26% | 10% | 30% | 10.4–15.6°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