June
June · September · August
United States · 1991–2020
June leads for comfortable weather in Plymouth: typically 25.6°C by day, 14.6°C at night, with 116 mm of rain. Based on measured 1991–2020 NOAA station history.
June · September · August
July · August · June
September · May · October
The weakest month is January, scoring 5 against June’s 76 — days reach only -4.6°C, 29° 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 | -4.6°C | -13.8°C | 24 mm | 5.1 | 9 h 07 | 5 | Strong coverage |
| February | -1.7°C | -11.8°C | 26 mm | 4.8 | 10 h 20 | 5 | Strong coverage |
| March | 5.5°C | -5.1°C | 47 mm | 7 | 11 h 46 | 5 | Strong coverage |
| April | 13.6°C | 1.7°C | 84 mm | 8.5 | 13 h 25 | 30 | Strong coverage |
| May | 20.6°C | 8.7°C | 113 mm | 10.2 | 14 h 49 | 60 | Strong coverage |
| June | 25.6°C | 14.6°C | 116 mm | 10.1 | 15 h 36 | 76 | Strong coverage |
| July | 28°C | 17.3°C | 117 mm | 8.7 | 15 h 17 | 66 | Strong coverage |
| August | 26.5°C | 16°C | 108 mm | 7.7 | 14 h 04 | 75 | Strong coverage |
| September | 22.1°C | 11.3°C | 87 mm | 7.6 | 12 h 28 | 76 | Strong coverage |
| October | 14.1°C | 3.9°C | 75 mm | 7.3 | 10 h 53 | 38 | Strong coverage |
| November | 5.3°C | -3.4°C | 47 mm | 6.1 | 9 h 29 | 5 | Strong coverage |
| December | -2.1°C | -10.4°C | 36 mm | 6.2 | 8 h 47 | 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 | 12.8°C24 Jan 1981 | -34.4°C30 Jan 2019 | 36 mm10 Jan 1975 | 88 mm1975 · driest 3 mm in 2024 | 57 |
| February | 17.2°C26 Feb 2024 | -36.1°C2 Feb 1996 | 27 mm29 Feb 2012 | 65 mm2023 · driest 1 mm in 1987 | 57 |
| March | 27.8°C29 Mar 1986 | -27.8°C2 Mar 2014 | 58 mm31 Mar 2023 | 118 mm1977 · driest 13 mm in 1994 | 58 |
| April | 34.4°C21 Apr 1980 | -15.6°C4 Apr 1995 | 77 mm27 Apr 1975 | 203 mm2001 · driest 4 mm in 1987 | 56 |
| May | 36.7°C28 May 2018 | -4.4°C6 May 1989 | 89 mm8 May 2006 | 248 mm1991 · driest 12 mm in 2009 | 58 |
| June | 38.9°C24 Jun 1988 | 2.2°C13 Jun 1969 | 99 mm14 Jun 1992 | 277 mm2025 · driest 3 mm in 1988 | 56 |
| July | 40.6°C31 Jul 1988 | 5.6°C1 Jul 1969 | 163 mm23 Jul 1987 | 348 mm1997 · driest 32 mm in 1974 | 58 |
| August | 37.8°C1 Aug 1988 | 3.9°C21 Aug 2004 | 69 mm30 Aug 1977 | 232 mm2016 · driest 8 mm in 2003 | 56 |
| September | 36.7°C3 Sep 2023 | -3.9°C22 Sep 1974 | 115 mm20 Sep 2018 | 239 mm1991 · driest 8 mm in 2011 | 57 |
| October | 32.2°C4 Oct 2025 | -10.6°C27 Oct 2020 | 68 mm4 Oct 2005 | 174 mm1968 · driest 9 mm in 2022 | 58 |
| November | 24.4°C2 Nov 2022 | -23.9°C26 Nov 1977 | 59 mm20 Nov 1973 | 142 mm1996 · driest 2 mm in 2002 | 57 |
| December | 19.4°C1 Dec 1998 | -33.3°C19 Dec 1983 | 32 mm11 Dec 2010 | 86 mm2010 · driest 5 mm in 1980 | 57 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 | 10 |
| February | 0 | 0 | 27 | <1 | 7 |
| March | <1 | 0 | 25 | 2 | 6 |
| April | 1 | <1 | 12 | 3 | 3 |
| May | 7 | 2 | 1 | 4 | 0 |
| June | 18 | 5 | 0 | 4 | 0 |
| July | 26 | 9 | 0 | 3 | 0 |
| August | 22 | 5 | 0 | 4 | 0 |
| September | 10 | 2 | <1 | 3 | 0 |
| October | 2 | 0 | 8 | 2 | <1 |
| November | 0 | 0 | 23 | 1 | 5 |
| December | 0 | 0 | 30 | 1 | 10 |
The best month has moved. On the 1961–1990 numbers the strongest month here was August (scoring 81); on 2011–2025 it is September (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 | 0% | 16% | 1% | 12% | -9.2–-1.6°C |
| February | 0% | 16% | 2% | 12% | -6.1–2.3°C |
| March | 2% | 22% | 6% | 22% | 1.4–9.4°C |
| April | 16% | 29% | 9% | 34% | 10.8–17.2°C |
| May | 43% | 32% | 11% | 40% | 18.5–23.6°C |
| June | 63% | 33% | 13% | 42% | 24.1–27.8°C |
| July | 73% | 27% | 11% | 27% | 26.3–30.2°C |
| August | 72% | 26% | 11% | 29% | 24.8–28.4°C |
| September | 51% | 25% | 8% | 29% | 19.5–24.4°C |
| October | 17% | 23% | 7% | 23% | 11.7–17.1°C |
| November | 2% | 20% | 4% | 22% | 1.2–8.1°C |
| December | 0% | 20% | 3% | 16% | -6.2–0.9°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