September
September · October · May
United States · 1991–2020
September leads for comfortable weather in Manchester: typically 29.1°C by day, 15.2°C at night, with 65 mm of rain. Based on measured 1991–2020 NOAA station history.
September · October · May
September · June · August
October · April · November
The weakest month is January, scoring 5 against September’s 76 — days reach only 6.4°C, 18° below the 24°C the score treats as ideal, and nights drop to -5.6°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 | 6.4°C | -5.6°C | 22 mm | 3.5 | 9 h 42 | 5 | Strong coverage |
| February | 9.3°C | -3.7°C | 36 mm | 3.7 | 10 h 40 | 17 | Strong coverage |
| March | 15.6°C | 1.6°C | 58 mm | 6.1 | 11 h 50 | 42 | Strong coverage |
| April | 21.1°C | 7.1°C | 83 mm | 7.1 | 13 h 10 | 66 | Strong coverage |
| May | 26°C | 12.9°C | 132 mm | 9.2 | 14 h 17 | 70 | Strong coverage |
| June | 32°C | 18.5°C | 109 mm | 7.7 | 14 h 54 | 53 | Strong coverage |
| July | 34.7°C | 21.1°C | 121 mm | 8 | 14 h 39 | 37 | Strong coverage |
| August | 33.5°C | 19.9°C | 108 mm | 7.4 | 13 h 42 | 46 | Strong coverage |
| September | 29.1°C | 15.2°C | 65 mm | 5.7 | 12 h 24 | 76 | Strong coverage |
| October | 22.1°C | 8.1°C | 63 mm | 5.9 | 11 h 06 | 75 | Strong coverage |
| November | 14°C | 1.4°C | 40 mm | 4 | 9 h 59 | 41 | Strong coverage |
| December | 7.5°C | -3.9°C | 38 mm | 3.8 | 9 h 26 | 10 | 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 | 25.6°C13 Jan 1928 | -28.9°C3 Jan 1919 | 52 mm16 Jan 1915 | 100 mm1949 · driest 0 mm in 1961 | 104 |
| February | 28.9°C28 Feb 2006 | -33.9°C12 Feb 1899 | 52 mm21 Feb 1997 | 113 mm1915 · driest 0 mm in 1991 | 102 |
| March | 36.1°C22 Mar 2026 | -22.8°C4 Mar 1978 | 61 mm29 Mar 2017 | 173 mm1973 · driest 0 mm in 1966 | 100 |
| April | 37.8°C6 Apr 1893 | -12.8°C5 Apr 1920 | 99 mm27 Apr 2009 | 227 mm1999 · driest 8 mm in 1989 | 101 |
| May | 39.4°C8 May 1895 | -2.8°C3 May 1976 | 122 mm17 May 1995 | 456 mm1995 · driest 10 mm in 1966 | 100 |
| June | 43.9°C27 Jun 1980 | 1.1°C20 Jun 1902 | 146 mm5 Jun 1896 | 387 mm1965 · driest 10 mm in 1922 | 98 |
| July | 45.0°C13 Jul 1954 | 6.7°C5 Jul 1972 | 184 mm18 Jul 1896 | 329 mm1993 · driest 0 mm in 1975 | 100 |
| August | 44.4°C19 Aug 2023 | 5.0°C31 Aug 1949 | 149 mm31 Aug 1981 | 246 mm2019 · driest 7 mm in 1971 | 100 |
| September | 45.0°C3 Sep 1947 | -5.0°C30 Sep 1984 | 125 mm4 Sep 1967 | 280 mm1967 · driest 5 mm in 1950 | 100 |
| October | 36.7°C5 Oct 1947 | -8.9°C31 Oct 2019 | 111 mm31 Oct 1979 | 247 mm1979 · driest 0 mm in 1952 | 100 |
| November | 31.1°C8 Nov 2006 | -21.1°C27 Nov 1975 | 79 mm8 Nov 2011 | 178 mm1998 · driest 0 mm in 1894 | 100 |
| December | 23.3°C15 Dec 2021 | -31.1°C22 Dec 1989 | 61 mm14 Dec 2015 | 109 mm2015 · driest 0 mm in 1976 | 101 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | <1 | 2 |
| February | <1 | 0 | 21 | 1 | 2 |
| March | 3 | <1 | 13 | 2 | 1 |
| April | 8 | 2 | 3 | 3 | <1 |
| May | 18 | 7 | <1 | 4 | 0 |
| June | 27 | 21 | 0 | 4 | 0 |
| July | 29 | 26 | 0 | 4 | 0 |
| August | 29 | 24 | 0 | 3 | 0 |
| September | 22 | 13 | 0 | 2 | 0 |
| October | 10 | 3 | 3 | 2 | <1 |
| November | 1 | 0 | 13 | 1 | <1 |
| December | 0 | 0 | 24 | 1 | 2 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 82); on 2011–2025 it is October (79). 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% | 10% | 2% | 5% | 1.1–8.9°C |
| February | 7% | 12% | 3% | 6% | 2.8–13.3°C |
| March | 24% | 17% | 5% | 16% | 9.4–18.2°C |
| April | 47% | 22% | 8% | 21% | 17.3–23.6°C |
| May | 64% | 28% | 12% | 33% | 22.8–27.7°C |
| June | 74% | 26% | 12% | 28% | 28.6–33.7°C |
| July | 79% | 21% | 9% | 20% | 31.4–36.6°C |
| August | 80% | 21% | 8% | 19% | 30.3–35.6°C |
| September | 78% | 19% | 8% | 17% | 25.7–31.8°C |
| October | 59% | 16% | 6% | 14% | 18.3–24.6°C |
| November | 18% | 11% | 4% | 6% | 10.1–16.7°C |
| December | 2% | 11% | 3% | 6% | 3.0–10.0°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