October
October · April · May
United States · 1991–2020
October leads for comfortable weather in De Kalb: typically 25.6°C by day, 11.7°C at night, with 87 mm of rain. Based on measured 1991–2020 NOAA station history.
October · April · May
September · May · June
November · March · October
The weakest month is January, scoring 25 against October’s 79 — days reach only 13.9°C, 10° below the 24°C the score treats as ideal, and nights drop to 1.8°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 | 13.9°C | 1.8°C | 128 mm | 8.3 | 10 h 12 | 25 | Strong coverage |
| February | 16.6°C | 3.9°C | 139 mm | 8.8 | 10 h 58 | 36 | Strong coverage |
| March | 21°C | 7.4°C | 140 mm | 8.5 | 11 h 53 | 57 | Strong coverage |
| April | 24.9°C | 10.9°C | 154 mm | 7 | 12 h 57 | 69 | Strong coverage |
| May | 29°C | 15.8°C | 108 mm | 7.8 | 13 h 49 | 68 | Strong coverage |
| June | 32.3°C | 20.1°C | 120 mm | 8.2 | 14 h 18 | 47 | Strong coverage |
| July | 33.4°C | 21.7°C | 143 mm | 10.3 | 14 h 07 | 35 | Strong coverage |
| August | 33°C | 21.2°C | 117 mm | 8.5 | 13 h 21 | 43 | Strong coverage |
| September | 30.9°C | 18.2°C | 75 mm | 5.4 | 12 h 20 | 64 | Strong coverage |
| October | 25.6°C | 11.7°C | 87 mm | 5.4 | 11 h 19 | 79 | Strong coverage |
| November | 19.6°C | 5.8°C | 102 mm | 7.2 | 10 h 26 | 56 | Strong coverage |
| December | 15.5°C | 3.8°C | 130 mm | 8.9 | 10 h 00 | 33 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 27.8°C28 Jan 2023 | -17.2°C21 Jan 1985 | 125 mm20 Jan 1979 | 308 mm1998 · driest 1 mm in 2001 | 62 |
| February | 32.2°C7 Feb 2023 | -14.4°C5 Feb 1996 | 149 mm19 Feb 1991 | 286 mm1990 · driest 36 mm in 1976 | 61 |
| March | 31.7°C28 Mar 1989 | -11.1°C3 Mar 1980 | 117 mm3 Mar 1979 | 382 mm1976 · driest 9 mm in 2007 | 61 |
| April | 36.1°C21 Apr 1987 | -2.2°C3 Apr 1962 | 335 mm24 Apr 2003 | 552 mm2003 · driest 16 mm in 1987 | 61 |
| May | 36.1°C29 May 1985 | 2.2°C4 May 1976 | 109 mm15 May 2008 | 346 mm2026 · driest 12 mm in 1965 | 61 |
| June | 41.1°C29 Jun 1988 | 5.6°C1 Jun 1984 | 120 mm30 Jun 2015 | 367 mm2004 · driest 5 mm in 2009 | 61 |
| July | 41.7°C30 Jul 1986 | 11.7°C16 Jul 1967 | 137 mm31 Jul 2005 | 427 mm2005 · driest 23 mm in 2016 | 61 |
| August | 39.4°C18 Aug 1990 | 9.4°C22 Aug 2012 | 139 mm29 Aug 2005 | 249 mm2008 · driest 9 mm in 1980 | 61 |
| September | 38.3°C5 Sep 2002 | 2.8°C30 Sep 1967 | 132 mm25 Sep 2002 | 260 mm2002 · driest 0 mm in 2019 | 61 |
| October | 37.8°C2 Oct 2019 | -2.8°C25 Oct 1965 | 110 mm25 Oct 2019 | 250 mm2019 · driest 0 mm in 2005 | 61 |
| November | 32.8°C3 Nov 1990 | -8.3°C30 Nov 1976 | 162 mm27 Nov 2001 | 288 mm1986 · driest 17 mm in 1985 | 61 |
| December | 31.1°C1 Dec 1991 | -16.7°C13 Dec 1962 | 156 mm25 Dec 1973 | 308 mm1961 · driest 29 mm in 1980 | 63 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | <1 | 0 | 14 | 4 |
| February | 2 | <1 | 9 | 4 |
| March | 9 | <1 | 4 | 4 |
| April | 17 | 3 | <1 | 3 |
| May | 26 | 15 | 0 | 3 |
| June | 29 | 24 | 0 | 3 |
| July | 30 | 27 | 0 | 4 |
| August | 30 | 27 | 0 | 4 |
| September | 27 | 20 | 0 | 2 |
| October | 18 | 6 | <1 | 2 |
| November | 4 | <1 | 6 | 3 |
| December | 1 | 0 | 10 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 12% | 29% | 13% | 34% | 11.0–16.7°C |
| February | 24% | 28% | 15% | 33% | 12.7–20.3°C |
| March | 45% | 28% | 15% | 29% | 17.8–23.4°C |
| April | 67% | 24% | 12% | 27% | 23.2–27.0°C |
| May | 74% | 26% | 12% | 28% | 26.8–30.3°C |
| June | 74% | 26% | 12% | 28% | 30.4–34.1°C |
| July | 67% | 33% | 14% | 39% | 31.6–34.9°C |
| August | 75% | 25% | 11% | 28% | 31.4–34.8°C |
| September | 80% | 20% | 7% | 17% | 28.9–32.9°C |
| October | 76% | 16% | 7% | 15% | 23.7–27.4°C |
| November | 41% | 24% | 10% | 23% | 17.2–22.1°C |
| December | 18% | 28% | 14% | 36% | 12.6–18.6°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