October
October · April · May
United States · 1991–2020
October leads for comfortable weather in Cambridge: typically 24.1°C by day, 9.9°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.
October · April · May
September · June · August
October · April · November
The weakest month is January, scoring 19 against October’s 81 — days reach only 12.4°C, 12° below the 24°C the score treats as ideal, and nights drop to -0.2°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 | 12.4°C | -0.2°C | 105 mm | 9.3 | 10 h 07 | 19 | Strong coverage |
| February | 14.9°C | 1.3°C | 97 mm | 7.9 | 10 h 54 | 32 | Strong coverage |
| March | 19.3°C | 4.6°C | 116 mm | 8.5 | 11 h 52 | 49 | Strong coverage |
| April | 24.3°C | 9.1°C | 78 mm | 7.3 | 12 h 59 | 79 | Strong coverage |
| May | 28.4°C | 14.3°C | 89 mm | 6.6 | 13 h 55 | 74 | Strong coverage |
| June | 32°C | 19.2°C | 108 mm | 7.9 | 14 h 25 | 52 | Strong coverage |
| July | 33.8°C | 21.2°C | 107 mm | 9 | 14 h 13 | 41 | Strong coverage |
| August | 32.8°C | 20.6°C | 113 mm | 8.1 | 13 h 25 | 45 | Strong coverage |
| September | 29.7°C | 16.9°C | 100 mm | 6.3 | 12 h 21 | 66 | Strong coverage |
| October | 24.1°C | 9.9°C | 82 mm | 5.6 | 11 h 16 | 81 | Strong coverage |
| November | 18°C | 3.9°C | 85 mm | 6.6 | 10 h 20 | 50 | Strong coverage |
| December | 13.6°C | 1°C | 108 mm | 8.7 | 9 h 54 | 25 | 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 | 28.3°C28 Jan 1944 | -18.9°C22 Jan 1985 | 90 mm19 Jan 1936 | 272 mm1960 · driest 17 mm in 1928 | 119 |
| February | 28.9°C21 Feb 2026 | -13.9°C18 Feb 1958 | 80 mm28 Feb 1929 | 268 mm1929 · driest 17 mm in 1930 | 121 |
| March | 33.3°C18 Mar 1945 | -15.0°C3 Mar 1980 | 97 mm15 Mar 1964 | 290 mm1980 · driest 17 mm in 1910 | 120 |
| April | 36.7°C29 Apr 1953 | -6.1°C4 Apr 1915 | 140 mm13 Apr 1923 | 309 mm1923 · driest 9 mm in 1950 | 122 |
| May | 39.4°C15 May 1944 | 0.0°C11 May 1977 | 83 mm23 May 2003 | 231 mm2026 · driest 0 mm in 1936 | 119 |
| June | 42.8°C30 Jun 2012 | 6.1°C6 Jun 1976 | 87 mm5 Jun 1903 | 286 mm2021 · driest 12 mm in 2008 | 122 |
| July | 42.8°C1 Jul 2012 | 10.0°C8 Jul 1947 | 76 mm31 Jul 1997 | 428 mm1919 · driest 11 mm in 1980 | 123 |
| August | 42.2°C20 Aug 1925 | 10.0°C23 Aug 1930 | 154 mm30 Aug 1964 | 363 mm1937 · driest 15 mm in 1953 | 121 |
| September | 42.8°C1 Sep 1912 | 1.7°C30 Sep 1967 | 178 mm28 Sep 2016 | 380 mm1959 · driest 4 mm in 1978 | 121 |
| October | 38.3°C5 Oct 1954 | -6.1°C30 Oct 1952 | 197 mm4 Oct 2015 | 359 mm2015 · driest 0 mm in 1943 | 120 |
| November | 33.3°C2 Nov 1961 | -11.1°C26 Nov 1950 | 101 mm11 Nov 2009 | 223 mm1948 · driest 5 mm in 1931 | 120 |
| December | 27.2°C20 Dec 1931 | -17.2°C13 Dec 1962 | 96 mm8 Dec 1919 | 227 mm2019 · driest 11 mm in 1988 | 121 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | <1 | 0 | 18 | 4 |
| February | <1 | 0 | 14 | 3 |
| March | 6 | <1 | 8 | 4 |
| April | 15 | 4 | 1 | 3 |
| May | 25 | 13 | 0 | 3 |
| June | 29 | 24 | 0 | 3 |
| July | 31 | 28 | 0 | 3 |
| August | 30 | 27 | 0 | 3 |
| September | 26 | 17 | 0 | 3 |
| October | 15 | 2 | 1 | 2 |
| November | 3 | 0 | 9 | 3 |
| December | <1 | 0 | 16 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 11% | 29% | 12% | 32% | 9.8–16.1°C |
| February | 17% | 29% | 14% | 32% | 12.3–18.3°C |
| March | 40% | 27% | 13% | 28% | 16.4–22.6°C |
| April | 66% | 24% | 10% | 23% | 22.2–26.8°C |
| May | 76% | 23% | 10% | 23% | 26.7–30.9°C |
| June | 72% | 27% | 12% | 30% | 30.0–34.1°C |
| July | 69% | 31% | 13% | 36% | 31.4–35.4°C |
| August | 73% | 27% | 12% | 27% | 31.0–34.2°C |
| September | 78% | 21% | 9% | 18% | 28.0–32.0°C |
| October | 74% | 16% | 7% | 13% | 22.7–26.4°C |
| November | 38% | 19% | 8% | 17% | 16.4–21.1°C |
| December | 12% | 27% | 11% | 31% | 11.3–16.5°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