September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Manchester: typically 28.8°C by day, 15.6°C at night, with 65 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
September · August · July
October · April · November
The weakest month is January, scoring 10 against September’s 77 — days reach only 7.5°C, 16° below the 24°C the score treats as ideal, and nights drop to -4.9°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 | 7.5°C | -4.9°C | 25 mm | 2.8 | 9 h 53 | 10 | Strong coverage |
| February | 9.9°C | -3.1°C | 31 mm | 3.6 | 10 h 46 | 20 | Strong coverage |
| March | 15.5°C | 1.9°C | 63 mm | 5.6 | 11 h 51 | 42 | Strong coverage |
| April | 20.7°C | 6.7°C | 83 mm | 5.8 | 13 h 05 | 65 | Strong coverage |
| May | 25.7°C | 13°C | 122 mm | 8.5 | 14 h 07 | 74 | Strong coverage |
| June | 31.4°C | 18.4°C | 126 mm | 7.4 | 14 h 41 | 53 | Strong coverage |
| July | 34.1°C | 21.1°C | 93 mm | 6.4 | 14 h 28 | 45 | Strong coverage |
| August | 33.1°C | 20.2°C | 82 mm | 6.5 | 13 h 34 | 51 | Strong coverage |
| September | 28.8°C | 15.6°C | 65 mm | 4.4 | 12 h 22 | 77 | Strong coverage |
| October | 21.9°C | 8.5°C | 73 mm | 5.2 | 11 h 11 | 74 | Strong coverage |
| November | 14.4°C | 1.6°C | 42 mm | 3.5 | 10 h 08 | 43 | Strong coverage |
| December | 8.1°C | -3.4°C | 36 mm | 3.8 | 9 h 38 | 14 | 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 | 26.7°C22 Jan 1967 | -26.1°C4 Jan 1947 | 60 mm5 Jan 2005 | 109 mm1949 · driest 0 mm in 1967 | 118 |
| February | 32.2°C22 Feb 1996 | -28.9°C12 Feb 1899 | 71 mm26 Feb 1948 | 117 mm1911 · driest 0 mm in 1930 | 119 |
| March | 36.7°C19 Mar 1907 | -19.4°C4 Mar 2014 | 79 mm12 Mar 1947 | 274 mm1973 · driest 0 mm in 1911 | 117 |
| April | 37.2°C14 Apr 2006 | -10.6°C3 Apr 1936 | 166 mm27 Apr 2009 | 252 mm2009 · driest 2 mm in 1996 | 119 |
| May | 41.1°C29 May 1913 | -3.3°C1 May 1909 | 190 mm5 May 1987 | 352 mm2019 · driest 5 mm in 1966 | 118 |
| June | 45.0°C25 Jun 1911 | 6.1°C4 Jun 1954 | 116 mm11 Jun 1983 | 343 mm1951 · driest 4 mm in 1911 | 118 |
| July | 46.1°C18 Jul 1936 | 9.4°C5 Jul 1924 | 120 mm14 Jul 1959 | 290 mm2015 · driest 0 mm in 1935 | 120 |
| August | 46.1°C12 Aug 1936 | 6.1°C31 Aug 1915 | 177 mm20 Aug 1920 | 275 mm1920 · driest 0 mm in 2000 | 119 |
| September | 43.9°C2 Sep 1939 | -1.1°C29 Sep 1916 | 114 mm12 Sep 2008 | 266 mm2008 · driest 0 mm in 1939 | 119 |
| October | 37.8°C4 Oct 1954 | -11.1°C30 Oct 1917 | 111 mm3 Oct 2002 | 212 mm2000 · driest 0 mm in 1977 | 118 |
| November | 31.1°C9 Nov 2006 | -13.9°C24 Nov 1950 | 160 mm3 Nov 1938 | 206 mm1998 · driest 0 mm in 1949 | 117 |
| December | 29.4°C24 Dec 1955 | -26.1°C22 Dec 1989 | 66 mm13 Dec 2015 | 120 mm2015 · driest 0 mm in 1977 | 116 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | <1 | 2 |
| February | <1 | 0 | 21 | <1 | 2 |
| March | 3 | <1 | 12 | 2 | <1 |
| April | 8 | 1 | 3 | 3 | <1 |
| May | 18 | 7 | 0 | 3 | 0 |
| June | 28 | 21 | 0 | 4 | 0 |
| July | 31 | 27 | 0 | 3 | 0 |
| August | 30 | 24 | 0 | 2 | 0 |
| September | 24 | 13 | 0 | 2 | 0 |
| October | 11 | 3 | 1 | 2 | <1 |
| November | 1 | 0 | 12 | 1 | <1 |
| December | 0 | 0 | 25 | 1 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 3% | 9% | 2% | 5% | 3.5–11.0°C |
| February | 12% | 12% | 3% | 6% | 5.4–14.8°C |
| March | 32% | 15% | 5% | 11% | 11.7–19.9°C |
| April | 53% | 19% | 8% | 18% | 18.2–23.8°C |
| May | 68% | 25% | 11% | 28% | 23.1–28.3°C |
| June | 75% | 24% | 12% | 24% | 29.2–34.3°C |
| July | 81% | 19% | 8% | 17% | 32.4–37.3°C |
| August | 82% | 18% | 7% | 16% | 31.0–36.9°C |
| September | 81% | 17% | 7% | 15% | 26.8–32.4°C |
| October | 64% | 14% | 6% | 11% | 20.2–26.1°C |
| November | 23% | 11% | 4% | 7% | 11.2–17.6°C |
| December | 3% | 10% | 3% | 5% | 5.2–11.3°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