September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Newtonia: typically 27.4°C by day, 14.2°C at night, with 127 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
August · July · June
October · April · November
The weakest month is January, scoring 5 against September’s 72 — days reach only 7.5°C, 16° below the 24°C the score treats as ideal, and nights drop to -4.9°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 | 7.5°C | -4.9°C | 66 mm | 4.8 | 9 h 53 | 5 | Strong coverage |
| February | 10°C | -2.9°C | 57 mm | 4.9 | 10 h 47 | 17 | Strong coverage |
| March | 15.1°C | 2.1°C | 95 mm | 7.1 | 11 h 51 | 35 | Strong coverage |
| April | 20.5°C | 7.2°C | 131 mm | 8 | 13 h 05 | 56 | Strong coverage |
| May | 24.6°C | 12.7°C | 165 mm | 9.4 | 14 h 07 | 70 | Strong coverage |
| June | 29°C | 17.9°C | 139 mm | 8 | 14 h 40 | 59 | Strong coverage |
| July | 31.6°C | 20.2°C | 108 mm | 6.6 | 14 h 27 | 52 | Strong coverage |
| August | 31.4°C | 19°C | 90 mm | 5.7 | 13 h 34 | 58 | Strong coverage |
| September | 27.4°C | 14.2°C | 127 mm | 6.3 | 12 h 22 | 72 | Strong coverage |
| October | 21.5°C | 7.6°C | 105 mm | 6.6 | 11 h 11 | 65 | Strong coverage |
| November | 14.8°C | 2°C | 89 mm | 6 | 10 h 09 | 36 | Strong coverage |
| December | 9.2°C | -2.8°C | 69 mm | 4.9 | 9 h 39 | 13 | 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 | 25.6°C1 Jan 1965 | -35.0°C22 Jan 1930 | 96 mm5 Jan 2005 | 300 mm1916 · driest 0 mm in 1961 | 134 |
| February | 30.6°C23 Feb 1996 | -34.4°C12 Feb 1899 | 78 mm21 Feb 1997 | 220 mm2018 · driest 1 mm in 1918 | 134 |
| March | 33.9°C20 Mar 1907 | -23.9°C12 Mar 1948 | 123 mm20 Mar 2012 | 241 mm1973 · driest 5 mm in 2001 | 134 |
| April | 35.0°C19 Apr 1987 | -14.4°C13 Apr 1957 | 146 mm30 Apr 2017 | 433 mm2017 · driest 6 mm in 2018 | 134 |
| May | 36.1°C31 May 2018 | -3.9°C1 May 1903 | 146 mm24 May 2011 | 548 mm1943 · driest 25 mm in 1940 | 134 |
| June | 40.6°C30 Jun 1894 | 3.3°C10 Jun 1988 | 139 mm11 Jun 2003 | 362 mm1935 · driest 12 mm in 1933 | 134 |
| July | 44.4°C14 Jul 1954 | 6.7°C22 Jul 1970 | 123 mm3 Jul 1976 | 269 mm1905 · driest 2 mm in 1935 | 132 |
| August | 42.8°C9 Aug 1936 | 4.4°C30 Aug 1988 | 131 mm4 Aug 1911 | 318 mm1950 · driest 6 mm in 1923 | 131 |
| September | 40.6°C3 Sep 1939 | -2.8°C30 Sep 1984 | 157 mm24 Sep 1945 | 410 mm1945 · driest 0 mm in 1897 | 131 |
| October | 35.0°C7 Oct 1939 | -10.0°C30 Oct 1917 | 181 mm9 Oct 2009 | 385 mm1941 · driest 1 mm in 1963 | 132 |
| November | 30.0°C8 Nov 2023 | -15.6°C29 Nov 1976 | 149 mm12 Nov 1909 | 318 mm1909 · driest 2 mm in 1950 | 132 |
| December | 26.7°C27 Dec 2025 | -30.6°C9 Dec 1917 | 178 mm16 Dec 1895 | 310 mm1895 · driest 2 mm in 1950 | 132 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 25 | 2 | 1 |
| February | <1 | 0 | 20 | 2 | 1 |
| March | 2 | <1 | 12 | 3 | <1 |
| April | 8 | <1 | 3 | 4 | 0 |
| May | 16 | 3 | <1 | 5 | 0 |
| June | 27 | 14 | 0 | 4 | 0 |
| July | 30 | 23 | 0 | 3 | 0 |
| August | 30 | 21 | 0 | 3 | 0 |
| September | 22 | 10 | <1 | 3 | 0 |
| October | 10 | 1 | 3 | 3 | 0 |
| November | 1 | 0 | 12 | 3 | <1 |
| December | 0 | 0 | 21 | 2 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 77); on 2011–2025 it is September (76). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 3% | 17% | 6% | 15% | 5.1–11.6°C |
| February | 10% | 20% | 6% | 17% | 6.5–14.1°C |
| March | 28% | 24% | 10% | 24% | 12.1–19.6°C |
| April | 48% | 28% | 13% | 32% | 19.2–23.9°C |
| May | 63% | 31% | 15% | 38% | 23.5–27.5°C |
| June | 71% | 28% | 14% | 31% | 27.8–32.3°C |
| July | 80% | 20% | 9% | 17% | 30.4–34.5°C |
| August | 80% | 20% | 9% | 18% | 30.0–34.8°C |
| September | 76% | 22% | 11% | 21% | 26.0–31.0°C |
| October | 59% | 21% | 9% | 22% | 20.3–25.4°C |
| November | 23% | 20% | 9% | 18% | 12.1–18.0°C |
| December | 5% | 18% | 7% | 15% | 6.8–12.4°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