September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Bradley: typically 23.3°C by day, 12.6°C at night, with 81 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
August · July · June
October · September · May
The weakest month is January, scoring 5 against September’s 83 — days reach only 4.5°C, 19° 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 | 4.5°C | -4.7°C | 80 mm | 10.6 | 9 h 48 | 5 | Strong coverage |
| February | 6.5°C | -3.2°C | 79 mm | 10.5 | 10 h 44 | 5 | Strong coverage |
| March | 11.1°C | 0.4°C | 102 mm | 12.4 | 11 h 50 | 13 | Strong coverage |
| April | 17.7°C | 5.7°C | 91 mm | 11 | 13 h 07 | 48 | Strong coverage |
| May | 21.7°C | 10.4°C | 119 mm | 12.3 | 14 h 12 | 64 | Strong coverage |
| June | 25.2°C | 14.6°C | 109 mm | 11.2 | 14 h 46 | 78 | Strong coverage |
| July | 26.9°C | 16.7°C | 127 mm | 11.3 | 14 h 33 | 67 | Strong coverage |
| August | 26.3°C | 15.9°C | 93 mm | 9 | 13 h 37 | 77 | Strong coverage |
| September | 23.3°C | 12.6°C | 81 mm | 7.7 | 12 h 23 | 83 | Strong coverage |
| October | 17.7°C | 6.6°C | 69 mm | 7.9 | 11 h 09 | 55 | Strong coverage |
| November | 11.5°C | 1.3°C | 71 mm | 8.6 | 10 h 04 | 24 | Strong coverage |
| December | 6.3°C | -2.4°C | 83 mm | 11 | 9 h 33 | 5 | 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 | 22.8°C31 Jan 2002 | -30.0°C21 Jan 1985 | 53 mm6 Jan 1995 | 162 mm1974 · driest 14 mm in 1983 | 63 |
| February | 25.0°C22 Feb 2023 | -26.7°C5 Feb 1996 | 59 mm15 Feb 2025 | 192 mm2025 · driest 18 mm in 2002 | 63 |
| March | 29.4°C28 Mar 2020 | -20.6°C3 Mar 1980 | 51 mm12 Mar 2010 | 233 mm1975 · driest 37 mm in 2003 | 63 |
| April | 30.0°C18 Apr 1976 | -11.7°C10 Apr 1985 | 91 mm4 Apr 1977 | 194 mm1987 · driest 7 mm in 1976 | 63 |
| May | 31.7°C19 May 1996 | -5.0°C10 May 1966 | 55 mm15 May 2014 | 194 mm2001 · driest 26 mm in 1977 | 64 |
| June | 35.6°C29 Jun 2012 | 0.0°C11 Jun 1972 | 77 mm5 Jun 2017 | 220 mm2026 · driest 32 mm in 1999 | 64 |
| July | 34.4°C8 Jul 1988 | 5.0°C1 Jul 1988 | 88 mm26 Jul 2001 | 245 mm2001 · driest 42 mm in 1993 | 64 |
| August | 35.6°C17 Aug 1988 | 2.2°C29 Aug 1965 | 78 mm7 Aug 2006 | 204 mm2006 · driest 27 mm in 2002 | 63 |
| September | 33.9°C3 Sep 2011 | -1.1°C24 Sep 1983 | 111 mm29 Sep 1964 | 254 mm2018 · driest 3 mm in 2019 | 63 |
| October | 32.8°C1 Oct 2019 | -7.8°C21 Oct 1974 | 80 mm17 Oct 1989 | 174 mm2019 · driest 4 mm in 1963 | 63 |
| November | 26.1°C2 Nov 2004 | -15.6°C25 Nov 1970 | 64 mm4 Nov 1985 | 170 mm2003 · driest 17 mm in 2001 | 63 |
| December | 23.3°C27 Dec 2015 | -27.8°C23 Dec 1989 | 45 mm30 Dec 1969 | 163 mm1991 · driest 15 mm in 1965 | 63 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 2 | 8 |
| February | 0 | 0 | 21 | 2 | 7 |
| March | <1 | 0 | 16 | 3 | 5 |
| April | 4 | 0 | 6 | 3 | 1 |
| May | 11 | <1 | <1 | 4 | 0 |
| June | 18 | 1 | 0 | 4 | 0 |
| July | 24 | 5 | 0 | 4 | 0 |
| August | 23 | 3 | 0 | 3 | 0 |
| September | 12 | 2 | 0 | 2 | 0 |
| October | 2 | <1 | 4 | 2 | <1 |
| November | <1 | 0 | 14 | 2 | 3 |
| December | 0 | 0 | 22 | 3 | 6 |
The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 86); on 2011–2025 it is September (90). 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 | <1% | 36% | 8% | 49% | 0.3–7.4°C |
| February | 1% | 38% | 9% | 53% | 2.0–10.3°C |
| March | 10% | 38% | 10% | 54% | 7.8–14.5°C |
| April | 29% | 37% | 10% | 50% | 14.9–19.8°C |
| May | 45% | 38% | 13% | 52% | 19.2–24.2°C |
| June | 61% | 35% | 12% | 47% | 23.5–26.4°C |
| July | 64% | 36% | 14% | 46% | 24.9–28.6°C |
| August | 69% | 30% | 10% | 36% | 24.6–27.7°C |
| September | 59% | 27% | 9% | 29% | 21.1–25.1°C |
| October | 33% | 25% | 7% | 28% | 15.6–19.7°C |
| November | 7% | 31% | 8% | 41% | 8.5–14.2°C |
| December | <1% | 36% | 9% | 50% | 2.9–9.5°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