September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Barrington: typically 23.8°C by day, 13.6°C at night, with 106 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · June
May · October · September
The weakest month is January, scoring 5 against September’s 83 — days reach only 3.5°C, 20° 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 | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 3.5°C | -5.5°C | 101 mm | 9 | 4.8°C | 9 h 27 | 5 | Strong coverage |
| February | 4.7°C | -4.7°C | 88 mm | 8 | 2.8°C | 10 h 31 | 5 | Strong coverage |
| March | 8.7°C | -1°C | 125 mm | 9.2 | 3.5°C | 11 h 48 | 5 | Strong coverage |
| April | 14.9°C | 4.2°C | 110 mm | 9.1 | 6.9°C | 13 h 17 | 35 | Strong coverage |
| May | 20.5°C | 9.6°C | 86 mm | 9 | 11.5°C | 14 h 31 | 66 | Strong coverage |
| June | 25.4°C | 14.9°C | 97 mm | 8.4 | 16.2°C | 15 h 11 | 82 | Strong coverage |
| July | 28.7°C | 18.5°C | 74 mm | 7.3 | 20.2°C | 14 h 55 | 69 | Strong coverage |
| August | 27.8°C | 17.7°C | 91 mm | 7.3 | 21.2°C | 13 h 51 | 71 | Strong coverage |
| September | 23.8°C | 13.6°C | 106 mm | 7.4 | 19.6°C | 12 h 25 | 83 | Strong coverage |
| October | 17.6°C | 7.3°C | 106 mm | 8.4 | 16.4°C | 11 h 00 | 50 | Strong coverage |
| November | 11.7°C | 2.1°C | 109 mm | 8.1 | 12.2°C | 9 h 46 | 21 | Strong coverage |
| December | 6.3°C | -2.4°C | 119 mm | 9.8 | 8.1°C | 9 h 10 | 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 | 21.1°C12 Jan 2020 | -25.0°C23 Jan 1976 | 74 mm4 Jan 1982 | 296 mm1979 · driest 13 mm in 1970 | 79 |
| February | 22.2°C18 Feb 1981 | -22.7°C14 Feb 2016 | 70 mm13 Feb 2008 | 183 mm1984 · driest 10 mm in 1987 | 79 |
| March | 29.4°C31 Mar 1998 | -17.2°C6 Mar 1948 | 135 mm30 Mar 2010 | 415 mm2010 · driest 14 mm in 1981 | 79 |
| April | 36.7°C19 Apr 1976 | -10.0°C4 Apr 1954 | 109 mm10 Apr 1983 | 324 mm1983 · driest 38 mm in 1966 | 79 |
| May | 35.6°C26 May 2010 | -1.7°C9 May 1956 | 131 mm31 May 1984 | 269 mm1948 · driest 18 mm in 1964 | 79 |
| June | 37.8°C24 Jun 2025 | 5.0°C1 Jun 1967 | 84 mm13 Jun 1998 | 282 mm1982 · driest 1 mm in 1949 | 79 |
| July | 38.9°C21 Jul 1991 | 8.9°C1 Jul 1988 | 121 mm30 Jul 1976 | 267 mm2009 · driest 8 mm in 1952 | 79 |
| August | 40.0°C2 Aug 1975 | 4.4°C31 Aug 1965 | 160 mm4 Aug 1979 | 283 mm1955 · driest 18 mm in 1984 | 78 |
| September | 37.8°C11 Sep 1983 | 0.0°C30 Sep 1951 | 120 mm21 Sep 1961 | 279 mm2008 · driest 19 mm in 2014 | 78 |
| October | 31.1°C10 Oct 1949 | -6.7°C27 Oct 1976 | 137 mm5 Oct 1962 | 391 mm2005 · driest 10 mm in 1994 | 78 |
| November | 27.2°C2 Nov 1950 | -14.4°C24 Nov 1989 | 89 mm25 Nov 1983 | 280 mm1983 · driest 10 mm in 2001 | 78 |
| December | 25.0°C7 Dec 1998 | -23.3°C25 Dec 1980 | 117 mm11 Dec 2024 | 273 mm1969 · driest 15 mm in 1955 | 78 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 3 | 6 |
| February | 0 | 0 | 24 | 3 | 5 |
| March | <1 | 0 | 19 | 4 | 4 |
| April | 1 | <1 | 4 | 4 | <1 |
| May | 6 | 2 | 0 | 3 | 0 |
| June | 17 | 5 | 0 | 3 | 0 |
| July | 27 | 11 | 0 | 2 | 0 |
| August | 25 | 9 | 0 | 3 | 0 |
| September | 12 | 2 | 0 | 3 | 0 |
| October | 2 | 0 | 1 | 3 | <1 |
| November | <1 | 0 | 11 | 3 | <1 |
| December | 0 | 0 | 23 | 4 | 3 |
The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 88); on 2011–2025 it is September (88). 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% | 29% | 11% | 34% | -0.3–6.1°C |
| February | <1% | 28% | 10% | 33% | 1.5–7.1°C |
| March | 3% | 29% | 12% | 36% | 5.9–11.1°C |
| April | 14% | 30% | 11% | 36% | 12.5–16.4°C |
| May | 42% | 29% | 9% | 34% | 17.8–22.2°C |
| June | 69% | 27% | 9% | 28% | 23.1–26.8°C |
| July | 77% | 23% | 8% | 20% | 26.4–30.1°C |
| August | 76% | 23% | 10% | 22% | 25.8–29.1°C |
| September | 64% | 23% | 10% | 24% | 21.8–25.0°C |
| October | 26% | 24% | 10% | 25% | 16.0–19.5°C |
| November | 4% | 28% | 11% | 31% | 9.3–13.8°C |
| December | <1% | 31% | 12% | 39% | 2.5–8.4°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