July
July · August · June
United States · 1991–2020
July leads for comfortable weather in McChord Air Force Base: typically 24.9°C by day, 13.9°C at night, with 15 mm of rain. Based on measured 1991–2020 NOAA station history.
July · August · June
July · August · June
May · September · June
The weakest month is January, scoring 5 against July’s 95 — days reach only 9.1°C, 15° 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 | 9.1°C | 3°C | 154 mm | 15.7 | 8 h 53 | 5 | Strong coverage |
| February | 10.3°C | 3.1°C | 102 mm | 12.5 | 10 h 12 | 15 | Strong coverage |
| March | 12.8°C | 4.6°C | 113 mm | 14.6 | 11 h 45 | 23 | Strong coverage |
| April | 15.7°C | 6.6°C | 85 mm | 12.2 | 13 h 32 | 42 | Strong coverage |
| May | 19.3°C | 9.5°C | 48 mm | 7.7 | 15 h 03 | 69 | Strong coverage |
| June | 21.8°C | 11.9°C | 37 mm | 6.4 | 15 h 53 | 84 | Strong coverage |
| July | 24.9°C | 13.9°C | 15 mm | 2.3 | 15 h 33 | 95 | Strong coverage |
| August | 25°C | 14°C | 20 mm | 2.8 | 14 h 14 | 95 | Strong coverage |
| September | 21.6°C | 11.7°C | 41 mm | 5.2 | 12 h 30 | 83 | Strong coverage |
| October | 16.1°C | 8.3°C | 105 mm | 11.2 | 10 h 47 | 45 | Strong coverage |
| November | 11.5°C | 4.8°C | 162 mm | 15 | 9 h 16 | 12 | Strong coverage |
| December | 8.6°C | 2.8°C | 156 mm | 16.8 | 8 h 31 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.9°C19 Jan 2005 | -8.9°C13 Jan 2024 | 93 mm9 Jan 1990 | 303 mm2006 · driest 14 mm in 1985 | 43 |
| February | 20.0°C27 Feb 1986 | -11.7°C3 Feb 1989 | 75 mm8 Feb 1996 | 235 mm2017 · driest 6 mm in 1993 | 44 |
| March | 25.0°C29 Mar 2004 | -9.4°C3 Mar 1989 | 54 mm13 Mar 2026 | 224 mm2014 · driest 33 mm in 1992 | 44 |
| April | 28.3°C18 Apr 2016 | -1.7°C11 Apr 1991 | 63 mm4 Apr 1991 | 195 mm1996 · driest 22 mm in 2021 | 44 |
| May | 33.3°C28 May 1983 | 1.1°C8 May 1982 | 49 mm15 May 2011 | 112 mm1984 · driest 1 mm in 1992 | 43 |
| June | 40.6°C27 Jun 2021 | 2.8°C12 Jun 1982 | 38 mm11 Jun 2001 | 106 mm1984 · driest 6 mm in 2015 | 43 |
| July | 34.4°C19 Jul 2015 | 8.3°C8 Jul 1999 | 22 mm9 Jul 1995 | 70 mm1983 · driest 0 mm in 2004 | 41 |
| August | 35.6°C16 Aug 2020 | 5.0°C30 Aug 1984 | 38 mm30 Aug 1983 | 73 mm1991 · driest 0 mm in 2017 | 42 |
| September | 31.7°C1 Sep 1987 | 1.1°C29 Sep 1983 | 48 mm28 Sep 2013 | 211 mm2013 · driest 0 mm in 1990 | 43 |
| October | 27.8°C12 Oct 1991 | -3.3°C31 Oct 2002 | 86 mm21 Oct 2003 | 269 mm2016 · driest 10 mm in 1987 | 42 |
| November | 21.1°C6 Nov 1999 | -15.0°C24 Nov 1985 | 120 mm22 Nov 2011 | 292 mm1990 · driest 29 mm in 1993 | 44 |
| December | 20.0°C10 Dec 1993 | -14.4°C23 Dec 1983 | 97 mm29 Dec 2011 | 311 mm2015 · driest 43 mm in 1985 | 43 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 7 | 5 |
| February | 0 | 0 | 6 | 3 |
| March | 0 | 0 | 2 | 4 |
| April | <1 | 0 | <1 | 2 |
| May | 3 | <1 | 0 | 2 |
| June | 6 | <1 | 0 | <1 |
| July | 16 | 2 | 0 | <1 |
| August | 15 | 2 | 0 | <1 |
| September | 5 | 0 | 0 | 1 |
| October | <1 | 0 | <1 | 3 |
| November | 0 | 0 | 4 | 5 |
| December | 0 | 0 | 7 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 50% | 16% | 64% | 7.7–10.8°C |
| February | <1% | 44% | 10% | 61% | 8.4–11.9°C |
| March | 2% | 47% | 12% | 62% | 10.8–14.6°C |
| April | 12% | 38% | 7% | 50% | 14.5–17.4°C |
| May | 37% | 25% | 5% | 29% | 16.8–20.9°C |
| June | 62% | 21% | 4% | 22% | 20.2–24.0°C |
| July | 89% | 8% | 1% | 4% | 23.5–27.0°C |
| August | 90% | 9% | 2% | 7% | 23.9–25.9°C |
| September | 65% | 18% | 4% | 21% | 20.4–23.0°C |
| October | 11% | 35% | 10% | 49% | 15.1–17.7°C |
| November | 0% | 52% | 18% | 70% | 9.9–13.1°C |
| December | 0% | 52% | 17% | 70% | 6.4–9.7°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