September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Huntley: typically 26.2°C by day, 7.6°C at night, with 28 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
August · July · June
May · September · October
The weakest month is January, scoring 5 against September’s 79 — days reach only 5.7°C, 18° below the 24°C the score treats as ideal, and nights drop to -9°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 | 5.7°C | -9°C | 4 mm | 1.8 | 9 h 26 | 5 | Good coverage |
| February | 6.5°C | -8.3°C | 7 mm | 1.8 | 10 h 31 | 5 | Good coverage |
| March | 12.2°C | -3.9°C | 18 mm | 3.3 | 11 h 48 | 27 | Good coverage |
| April | 16°C | 0°C | 43 mm | 6.6 | 13 h 17 | 42 | Good coverage |
| May | 21.1°C | 5.3°C | 62 mm | 8.4 | 14 h 32 | 64 | Good coverage |
| June | 28.3°C | 10.6°C | 48 mm | 6.7 | 15 h 13 | 73 | Good coverage |
| July | 33°C | 14.9°C | 45 mm | 6 | 14 h 57 | 66 | Good coverage |
| August | 31.5°C | 13.1°C | 23 mm | 4.1 | 13 h 52 | 71 | Good coverage |
| September | 26.2°C | 7.6°C | 28 mm | 3.7 | 12 h 26 | 79 | Good coverage |
| October | 17.4°C | 0.4°C | 29 mm | 4.1 | 11 h | 51 | Good coverage |
| November | 11.2°C | -5°C | 6 mm | 2 | 9 h 45 | 22 | Good coverage |
| December | 5°C | -9.5°C | 5 mm | 1.7 | 9 h 08 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.9°C27 Jan 2015 | -32.7°C16 Jan 2024 | 8 mm4 Jan 2017 | 13 mm2017 · driest 0 mm in 2022 | 27 |
| February | 22.8°C28 Feb 2006 | -34.3°C18 Feb 2006 | 23 mm23 Feb 2017 | 29 mm2017 · driest 0 mm in 2022 | 27 |
| March | 32.2°C21 Mar 2026 | -27.1°C4 Mar 2019 | 25 mm18 Mar 2003 | 49 mm2003 · driest 0 mm in 2023 | 27 |
| April | 32.2°C24 Apr 2012 | -17.1°C3 Apr 2020 | 34 mm18 Apr 2000 | 81 mm2015 · driest 9 mm in 2025 | 27 |
| May | 37.8°C29 May 2003 | -6.7°C2 May 2005 | 63 mm19 May 2018 | 175 mm2015 · driest 12 mm in 2002 | 27 |
| June | 40.6°C26 Jun 2012 | -2.7°C8 Jun 2007 | 40 mm12 Jun 2005 | 121 mm2010 · driest 2 mm in 2016 | 28 |
| July | 41.7°C18 Jul 2022 | 5.6°C30 Jul 2009 | 43 mm9 Jul 2001 | 99 mm2009 · driest 10 mm in 2026 | 27 |
| August | 40.6°C4 Aug 2024 | 2.2°C28 Aug 2004 | 34 mm3 Aug 1998 | 87 mm2008 · driest 0 mm in 2020 | 26 |
| September | 38.9°C5 Sep 2020 | -6.7°C29 Sep 1999 | 37 mm5 Sep 2004 | 103 mm2004 · driest 0 mm in 2022 | 27 |
| October | 33.3°C3 Oct 2025 | -23.8°C27 Oct 2020 | 42 mm11 Oct 2013 | 132 mm1998 · driest 1 mm in 2022 | 27 |
| November | 26.7°C2 Nov 2008 | -23.9°C29 Nov 2004 | 20 mm4 Nov 2015 | 22 mm2015 · driest 0 mm in 2006 | 27 |
| December | 23.3°C22 Dec 2025 | -32.8°C21 Dec 1998 | 9 mm15 Dec 2015 | 18 mm2007 · driest 0 mm in 2018 | 27 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 29 | 0 |
| February | 0 | 0 | 27 | <1 |
| March | 1 | 0 | 26 | <1 |
| April | 4 | <1 | 15 | 1 |
| May | 10 | 3 | 4 | 2 |
| June | 23 | 13 | <1 | 1 |
| July | 29 | 24 | 0 | 1 |
| August | 29 | 21 | 0 | <1 |
| September | 19 | 10 | 1 | <1 |
| October | 6 | 1 | 15 | <1 |
| November | <1 | 0 | 26 | 0 |
| December | 0 | 0 | 29 | 0 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 5% | 0% | <1% | 2.2–8.0°C |
| February | 2% | 6% | <1% | 2% | 3.6–9.6°C |
| March | 16% | 10% | 2% | 8% | 8.2–15.9°C |
| April | 32% | 20% | 3% | 19% | 14.0–17.7°C |
| May | 50% | 28% | 6% | 31% | 17.9–23.5°C |
| June | 75% | 23% | 5% | 22% | 25.3–31.9°C |
| July | 81% | 18% | 4% | 16% | 30.9–35.0°C |
| August | 86% | 13% | 2% | 9% | 29.7–33.4°C |
| September | 79% | 12% | 3% | 7% | 24.3–28.8°C |
| October | 42% | 13% | 2% | 7% | 13.9–21.1°C |
| November | 14% | 6% | <1% | <1% | 8.4–14.5°C |
| December | 1% | 5% | 0% | <1% | 2.4–9.3°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