September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Cumminsville: typically 24.1°C by day, 11.6°C at night, with 68 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · June
May · September · October
The weakest month is January, scoring 5 against September’s 84 — days reach only 1.4°C, 23° 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 | 1.4°C | -7.6°C | 31 mm | 6.6 | 9 h 22 | 5 | Good coverage |
| February | 2.6°C | -7.2°C | 27 mm | 5.8 | 10 h 29 | 5 | Good coverage |
| March | 7.7°C | -3.2°C | 44 mm | 8 | 11 h 48 | 8 | Good coverage |
| April | 14.9°C | 2.1°C | 61 mm | 9.5 | 13 h 19 | 37 | Good coverage |
| May | 21.9°C | 8.5°C | 74 mm | 10.5 | 14 h 35 | 69 | Good coverage |
| June | 26.1°C | 13.5°C | 79 mm | 10.6 | 15 h 17 | 78 | Good coverage |
| July | 28.4°C | 16°C | 90 mm | 9.8 | 15 h 01 | 70 | Good coverage |
| August | 27.5°C | 15.4°C | 90 mm | 9 | 13 h 54 | 75 | Good coverage |
| September | 24.1°C | 11.6°C | 68 mm | 8.2 | 12 h 26 | 84 | Good coverage |
| October | 16.8°C | 5.9°C | 81 mm | 10.5 | 10 h 59 | 47 | Good coverage |
| November | 10.4°C | 0.5°C | 48 mm | 8.2 | 9 h 42 | 22 | Good coverage |
| December | 4.1°C | -3.9°C | 48 mm | 8 | 9 h 04 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.9°C25 Jan 1950 | -23.9°C31 Jan 1948 | 36 mm5 Jan 2007 | 86 mm2007 · driest 5 mm in 1946 | 33 |
| February | 25.0°C24 Feb 2017 | -24.9°C24 Feb 2015 | 45 mm13 Feb 1948 | 63 mm1948 · driest 2 mm in 2015 | 33 |
| March | 27.2°C29 Mar 1946 | -21.0°C6 Mar 2015 | 29 mm30 Mar 1951 | 87 mm2001 · driest 9 mm in 2013 | 34 |
| April | 32.8°C27 Apr 2009 | -13.2°C5 Apr 2016 | 56 mm11 Apr 1948 | 172 mm1948 · driest 24 mm in 2009 | 34 |
| May | 35.6°C30 May 2006 | -4.4°C11 May 1949 | 39 mm16 May 2014 | 162 mm2004 · driest 17 mm in 2005 | 34 |
| June | 36.1°C21 Jun 1953 | 0.6°C8 Jun 1949 | 45 mm29 Jun 2005 | 148 mm2005 · driest 2 mm in 2025 | 33 |
| July | 38.9°C21 Jul 2011 | 6.7°C2 Jul 2001 | 52 mm22 Jul 2006 | 164 mm2006 · driest 23 mm in 1952 | 33 |
| August | 37.8°C9 Aug 2001 | 3.9°C30 Aug 1946 | 62 mm18 Aug 2021 | 135 mm2018 · driest 27 mm in 2025 | 33 |
| September | 36.7°C3 Sep 1953 | -1.7°C28 Sep 1947 | 51 mm17 Sep 2004 | 124 mm2004 · driest 18 mm in 2009 | 34 |
| October | 32.8°C5 Oct 1951 | -5.0°C30 Oct 2000 | 51 mm29 Oct 2017 | 153 mm2021 · driest 11 mm in 1947 | 34 |
| November | 28.3°C1 Nov 1950 | -15.5°C23 Nov 2018 | 60 mm4 Nov 1950 | 99 mm1950 · driest 11 mm in 2019 | 35 |
| December | 22.8°C4 Dec 2012 | -21.7°C24 Dec 1945 | 40 mm1 Dec 2010 | 87 mm2012 · driest 19 mm in 2005 | 34 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 27 | <1 |
| February | <1 | 0 | 25 | <1 |
| March | <1 | 0 | 23 | 1 |
| April | 3 | <1 | 12 | 2 |
| May | 11 | 3 | 1 | 2 |
| June | 19 | 7 | 0 | 3 |
| July | 26 | 11 | 0 | 3 |
| August | 24 | 8 | 0 | 3 |
| September | 13 | 3 | <1 | 2 |
| October | 3 | <1 | 4 | 3 |
| November | <1 | 0 | 15 | 1 |
| December | 0 | 0 | 25 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 22% | 3% | 21% | -2.0–4.7°C |
| February | <1% | 20% | 2% | 17% | 0.4–7.1°C |
| March | 6% | 27% | 4% | 32% | 4.5–11.8°C |
| April | 18% | 33% | 7% | 43% | 12.2–18.1°C |
| May | 43% | 33% | 8% | 41% | 18.9–24.3°C |
| June | 64% | 32% | 9% | 41% | 24.8–28.3°C |
| July | 69% | 30% | 8% | 34% | 26.2–31.0°C |
| August | 71% | 27% | 9% | 31% | 25.6–29.6°C |
| September | 61% | 26% | 6% | 29% | 22.6–25.8°C |
| October | 31% | 29% | 7% | 35% | 15.3–20.8°C |
| November | 6% | 28% | 5% | 32% | 7.5–13.3°C |
| December | <1% | 26% | 4% | 28% | 0.8–7.4°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