May
May · September · August
United States · 1991–2020
May leads for comfortable weather in Time: typically 23.8°C by day, 12.1°C at night, with 117 mm of rain. Based on measured 1991–2020 NOAA station history.
May · September · August
August · July · June
October · April · May
The weakest month is January, scoring 5 against May’s 76 — days reach only 2.4°C, 22° 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 | 2.4°C | -7.5°C | 55 mm | 4.9 | 9 h 39 | 5 | Good coverage |
| February | 4.9°C | -5.6°C | 53 mm | 5.4 | 10 h 38 | 5 | Good coverage |
| March | 11.3°C | -0.3°C | 76 mm | 7.7 | 11 h 49 | 20 | Good coverage |
| April | 18.3°C | 5.7°C | 105 mm | 9 | 13 h 11 | 49 | Good coverage |
| May | 23.8°C | 12.1°C | 117 mm | 10 | 14 h 20 | 76 | Good coverage |
| June | 28.4°C | 17.2°C | 130 mm | 8.7 | 14 h 57 | 63 | Good coverage |
| July | 30.5°C | 19.1°C | 106 mm | 7.5 | 14 h 42 | 57 | Good coverage |
| August | 29.6°C | 17.5°C | 92 mm | 6.4 | 13 h 43 | 66 | Good coverage |
| September | 26.8°C | 13°C | 88 mm | 6.7 | 12 h 24 | 76 | Good coverage |
| October | 19.6°C | 6.8°C | 72 mm | 6.8 | 11 h 05 | 62 | Good coverage |
| November | 12°C | 0.7°C | 72 mm | 6.6 | 9 h 57 | 26 | Good coverage |
| December | 4.7°C | -5°C | 52 mm | 5.6 | 9 h 23 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.7°C8 Jan 2008 | -31.7°C5 Jan 1999 | 82 mm8 Jan 2008 | 198 mm2005 · driest 2 mm in 2009 | 27 |
| February | 26.1°C28 Feb 2024 | -27.8°C4 Feb 1996 | 49 mm21 Feb 2018 | 129 mm1998 · driest 6 mm in 2016 | 28 |
| March | 28.3°C15 Mar 2012 | -21.7°C3 Mar 2014 | 62 mm18 Mar 2021 | 166 mm2003 · driest 25 mm in 2005 | 29 |
| April | 32.2°C4 Apr 2011 | -7.8°C3 Apr 2018 | 110 mm30 Apr 2017 | 202 mm2017 · driest 32 mm in 2018 | 30 |
| May | 35.6°C28 May 2018 | -1.7°C4 May 2005 | 83 mm25 May 2024 | 240 mm2002 · driest 12 mm in 2005 | 29 |
| June | 39.4°C29 Jun 2012 | 6.7°C1 Jun 1996 | 85 mm30 Jun 2020 | 348 mm2015 · driest 3 mm in 2016 | 31 |
| July | 40.0°C8 Jul 2012 | 10.0°C28 Jul 2013 | 115 mm20 Jul 2010 | 238 mm2010 · driest 8 mm in 2026 | 29 |
| August | 40.0°C16 Aug 2007 | 7.2°C15 Aug 2004 | 70 mm8 Aug 2014 | 222 mm2014 · driest 8 mm in 2013 | 29 |
| September | 36.1°C19 Sep 2018 | 0.6°C24 Sep 2012 | 92 mm14 Sep 2008 | 275 mm2008 · driest 0 mm in 2017 | 26 |
| October | 33.9°C4 Oct 2018 | -4.4°C31 Oct 2023 | 88 mm31 Oct 2004 | 173 mm2004 · driest 11 mm in 2016 | 24 |
| November | 28.9°C3 Nov 2016 | -14.4°C12 Nov 2019 | 52 mm5 Nov 2024 | 159 mm2015 · driest 11 mm in 1999 | 26 |
| December | 22.8°C4 Dec 2012 | -23.3°C23 Dec 2022 | 53 mm27 Dec 2015 | 199 mm2015 · driest 11 mm in 2017 | 28 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | 2 | 2 |
| February | 0 | 0 | 23 | 2 | 2 |
| March | 2 | 0 | 17 | 3 | <1 |
| April | 6 | <1 | 5 | 4 | <1 |
| May | 14 | 4 | <1 | 4 | 0 |
| June | 24 | 12 | 0 | 4 | 0 |
| July | 27 | 17 | 0 | 3 | 0 |
| August | 28 | 14 | 0 | 3 | 0 |
| September | 19 | 8 | 0 | 3 | 0 |
| October | 8 | 1 | 4 | 2 | <1 |
| November | <1 | 0 | 15 | 2 | <1 |
| December | 0 | 0 | 25 | 2 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 17% | 6% | 11% | -0.4–5.5°C |
| February | 2% | 19% | 6% | 17% | 0.0–8.6°C |
| March | 10% | 25% | 10% | 27% | 8.4–14.7°C |
| April | 30% | 31% | 13% | 41% | 15.7–21.1°C |
| May | 53% | 32% | 12% | 41% | 20.9–26.1°C |
| June | 70% | 29% | 13% | 32% | 26.4–29.9°C |
| July | 77% | 25% | 12% | 25% | 28.2–32.6°C |
| August | 80% | 20% | 9% | 16% | 27.8–31.1°C |
| September | 77% | 21% | 9% | 19% | 24.5–28.9°C |
| October | 41% | 22% | 8% | 22% | 17.0–22.0°C |
| November | 11% | 21% | 8% | 21% | 7.7–15.0°C |
| December | <1% | 19% | 6% | 16% | 2.6–8.1°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