June
June · August · September
United States · 1991–2020
June leads for comfortable weather in Cambridge: typically 24.4°C by day, 11.6°C at night, with 106 mm of rain. Based on measured 1991–2020 NOAA station history.
June · August · September
July · August · June
May · September · June
The weakest month is January, scoring 5 against June’s 76 — days reach only -0.2°C, 24° 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 | -0.2°C | -10.3°C | 55 mm | 7.8 | 9 h 20 | 5 | Good coverage |
| February | 1.6°C | -9.1°C | 53 mm | 7.8 | 10 h 27 | 5 | Good coverage |
| March | 6.4°C | -4.7°C | 61 mm | 8.3 | 11 h 47 | 5 | Good coverage |
| April | 13.9°C | 1.3°C | 62 mm | 9.6 | 13 h 20 | 32 | Good coverage |
| May | 20.3°C | 7.1°C | 91 mm | 10.5 | 14 h 38 | 59 | Good coverage |
| June | 24.4°C | 11.6°C | 106 mm | 10.4 | 15 h 20 | 76 | Good coverage |
| July | 27°C | 14.2°C | 116 mm | 10.1 | 15 h 04 | 71 | Good coverage |
| August | 26.1°C | 13.3°C | 103 mm | 9.2 | 13 h 56 | 75 | Good coverage |
| September | 22.5°C | 9.3°C | 96 mm | 7.3 | 12 h 26 | 73 | Good coverage |
| October | 15.4°C | 3.8°C | 96 mm | 9.7 | 10 h 57 | 37 | Good coverage |
| November | 9.4°C | -1.1°C | 68 mm | 8.7 | 9 h 39 | 13 | Good coverage |
| December | 2.9°C | -6.2°C | 73 mm | 9.5 | 9 h 01 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 19.4°C6 Jan 2007 | -30.5°C7 Jan 2018 | 34 mm25 Jan 2010 | 106 mm1999 · driest 16 mm in 2004 | 28 |
| February | 25.0°C21 Feb 2018 | -28.2°C4 Feb 2023 | 30 mm6 Feb 2008 | 122 mm2008 · driest 12 mm in 2023 | 28 |
| March | 26.1°C20 Mar 2012 | -23.8°C6 Mar 2015 | 53 mm23 Mar 2024 | 161 mm2024 · driest 3 mm in 2023 | 28 |
| April | 31.7°C28 Apr 2009 | -16.6°C5 Apr 2016 | 31 mm26 Apr 2025 | 127 mm2022 · driest 4 mm in 2023 | 28 |
| May | 32.8°C21 May 2022 | -4.9°C1 May 2008 | 52 mm21 May 2013 | 191 mm2025 · driest 21 mm in 2023 | 28 |
| June | 33.9°C19 Jun 2024 | -1.0°C1 Jun 2009 | 47 mm7 Jun 2025 | 185 mm2013 · driest 35 mm in 2022 | 28 |
| July | 35.0°C20 Jul 2022 | 5.0°C27 Jul 2001 | 88 mm1 Jul 2017 | 241 mm2021 · driest 51 mm in 2015 | 28 |
| August | 35.0°C4 Aug 2022 | 3.9°C28 Aug 2025 | 78 mm28 Aug 2011 | 230 mm2011 · driest 16 mm in 2025 | 27 |
| September | 33.3°C11 Sep 2013 | -4.4°C29 Sep 2000 | 84 mm30 Sep 2015 | 189 mm2015 · driest 26 mm in 2014 | 27 |
| October | 30.0°C4 Oct 2023 | -8.2°C31 Oct 2020 | 89 mm8 Oct 2005 | 189 mm2005 · driest 28 mm in 2000 | 27 |
| November | 23.9°C5 Nov 2022 | -17.7°C23 Nov 2018 | 41 mm30 Nov 2005 | 146 mm2018 · driest 17 mm in 2000 | 27 |
| December | 21.1°C24 Dec 2015 | -23.9°C21 Dec 2004 | 56 mm18 Dec 2023 | 143 mm2023 · driest 16 mm in 1999 | 28 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 28 | 2 |
| February | 0 | 0 | 26 | 2 |
| March | <1 | 0 | 25 | 2 |
| April | 2 | <1 | 14 | 2 |
| May | 7 | 1 | 3 | 3 |
| June | 15 | 3 | <1 | 4 |
| July | 24 | 6 | 0 | 4 |
| August | 21 | 4 | 0 | 3 |
| September | 9 | 1 | <1 | 3 |
| October | 1 | 0 | 8 | 3 |
| November | 0 | 0 | 19 | 2 |
| December | 0 | 0 | 26 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 25% | 5% | 24% | -3.2–3.2°C |
| February | <1% | 27% | 5% | 31% | -1.7–4.9°C |
| March | 3% | 27% | 7% | 35% | 3.4–10.2°C |
| April | 14% | 33% | 7% | 44% | 11.6–16.3°C |
| May | 41% | 33% | 10% | 39% | 18.3–22.7°C |
| June | 60% | 35% | 12% | 50% | 23.2–26.4°C |
| July | 66% | 33% | 14% | 39% | 25.1–28.9°C |
| August | 69% | 30% | 10% | 32% | 24.9–27.7°C |
| September | 58% | 25% | 11% | 29% | 21.1–24.0°C |
| October | 18% | 30% | 10% | 38% | 13.9–17.6°C |
| November | 4% | 29% | 8% | 33% | 7.0–12.0°C |
| December | <1% | 31% | 8% | 41% | 0.2–5.7°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