August
August · July · September
United States · 1991–2020
August leads for comfortable weather in Mill Creek East: typically 23°C by day, 13.1°C at night, with 25 mm of rain. Based on measured 1991–2020 NOAA station history.
August · July · September
August · July · September
September · June · July
The weakest month is January, scoring 5 against August’s 92 — days reach only 7.7°C, 16° 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 | 7.7°C | 2.7°C | 98 mm | 14.8 | 8 h 48 | 5 | Good coverage |
| February | 8.4°C | 2.5°C | 74 mm | 12.8 | 10 h 09 | 12 | Good coverage |
| March | 10.7°C | 3.9°C | 94 mm | 14.7 | 11 h 44 | 17 | Good coverage |
| April | 13.3°C | 5.7°C | 67 mm | 11.8 | 13 h 34 | 36 | Good coverage |
| May | 16.7°C | 8.5°C | 55 mm | 10 | 15 h 07 | 55 | Good coverage |
| June | 19.3°C | 10.8°C | 43 mm | 8.5 | 15 h 59 | 71 | Good coverage |
| July | 22.5°C | 12.6°C | 18 mm | 3.9 | 15 h 39 | 90 | Good coverage |
| August | 23°C | 13.1°C | 25 mm | 3.8 | 14 h 17 | 92 | Good coverage |
| September | 19.7°C | 11.3°C | 44 mm | 7.3 | 12 h 30 | 74 | Good coverage |
| October | 14.3°C | 7.8°C | 85 mm | 12 | 10 h 45 | 40 | Good coverage |
| November | 9.9°C | 4.5°C | 129 mm | 14.5 | 9 h 12 | 11 | Good coverage |
| December | 7°C | 2.2°C | 116 mm | 15.1 | 8 h 25 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.3°C29 Jan 2024 | -16.1°C25 Jan 1950 | 43 mm21 Jan 2016 | 191 mm2006 · driest 9 mm in 2017 | 33 |
| February | 17.8°C9 Feb 2016 | -12.8°C1 Feb 1950 | 52 mm21 Feb 1949 | 176 mm1999 · driest 27 mm in 2009 | 33 |
| March | 25.6°C29 Mar 2004 | -6.0°C10 Mar 2009 | 44 mm15 Mar 2015 | 183 mm2026 · driest 29 mm in 2022 | 33 |
| April | 28.3°C18 Apr 2016 | -0.6°C3 Apr 1948 | 33 mm2 Apr 2026 | 129 mm2026 · driest 13 mm in 2004 | 33 |
| May | 31.1°C17 May 2008 | 1.1°C7 May 2002 | 45 mm28 May 1948 | 154 mm1948 · driest 9 mm in 2018 | 33 |
| June | 37.8°C28 Jun 2021 | 4.4°C12 Jun 1952 | 82 mm13 Jun 1948 | 138 mm1948 · driest 1 mm in 2025 | 33 |
| July | 37.8°C29 Jul 2009 | 5.0°C2 Jul 1950 | 24 mm23 Jul 2014 | 50 mm1999 · driest 0 mm in 2017 | 32 |
| August | 37.8°C16 Aug 2020 | 7.8°C23 Aug 1951 | 37 mm29 Aug 2013 | 70 mm2024 · driest 0 mm in 2011 | 31 |
| September | 31.7°C16 Sep 2025 | 2.8°C24 Sep 1948 | 41 mm26 Sep 1948 | 101 mm2021 · driest 2 mm in 2022 | 31 |
| October | 30.6°C16 Oct 2022 | -1.7°C30 Oct 2002 | 46 mm20 Oct 2003 | 191 mm2016 · driest 23 mm in 2002 | 32 |
| November | 22.8°C2 Nov 1949 | -9.9°C23 Nov 2010 | 47 mm19 Nov 2012 | 233 mm2006 · driest 46 mm in 2019 | 32 |
| December | 16.7°C29 Dec 2023 | -12.1°C20 Dec 2008 | 73 mm3 Dec 2007 | 210 mm2007 · driest 28 mm in 2011 | 31 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 7 | 3 |
| February | 0 | 0 | 7 | 2 |
| March | <1 | 0 | 3 | 3 |
| April | <1 | 0 | <1 | 2 |
| May | 1 | 0 | 0 | 1 |
| June | 3 | <1 | 0 | 1 |
| July | 8 | 1 | 0 | <1 |
| August | 9 | 1 | 0 | <1 |
| September | 3 | <1 | 0 | 1 |
| October | 0 | 0 | <1 | 3 |
| November | 0 | 0 | 3 | 4 |
| December | 0 | 0 | 8 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 46% | 10% | 63% | 5.3–9.3°C |
| February | 0% | 45% | 7% | 63% | 6.3–9.9°C |
| March | 1% | 45% | 8% | 64% | 8.4–12.2°C |
| April | 7% | 36% | 5% | 49% | 12.2–14.9°C |
| May | 20% | 29% | 5% | 34% | 14.8–18.3°C |
| June | 42% | 25% | 4% | 29% | 17.0–21.1°C |
| July | 75% | 12% | 1% | 7% | 20.3–24.9°C |
| August | 76% | 13% | 2% | 11% | 21.2–24.4°C |
| September | 43% | 22% | 5% | 27% | 18.5–21.4°C |
| October | 6% | 39% | 9% | 57% | 12.9–16.1°C |
| November | 1% | 49% | 15% | 69% | 8.2–11.4°C |
| December | 0% | 50% | 12% | 70% | 4.4–9.2°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