September
September · June · August
United States · 1991–2020
September leads for comfortable weather in White River City: typically 24.1°C by day, 3.4°C at night, with 43 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · June
May · June · September
The weakest month is January, scoring 5 against September’s 75 — days reach only 1.1°C, 23° below the 24°C the score treats as ideal, and nights drop to -14°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 | 1.1°C | -14°C | 28 mm | 6.2 | 9 h 37 | 5 | Strong coverage |
| February | 3.8°C | -10.9°C | 25 mm | 5.7 | 10 h 37 | 5 | Strong coverage |
| March | 10.2°C | -5.8°C | 33 mm | 6.3 | 11 h 49 | 14 | Strong coverage |
| April | 14.3°C | -2.5°C | 46 mm | 7.6 | 13 h 12 | 31 | Strong coverage |
| May | 19.9°C | 1.3°C | 43 mm | 7.6 | 14 h 22 | 57 | Strong coverage |
| June | 26.3°C | 4.8°C | 25 mm | 3.9 | 15 h 00 | 73 | Strong coverage |
| July | 30.3°C | 8.6°C | 26 mm | 5 | 14 h 45 | 66 | Strong coverage |
| August | 28.7°C | 7.8°C | 34 mm | 6.4 | 13 h 45 | 68 | Strong coverage |
| September | 24.1°C | 3.4°C | 43 mm | 5.6 | 12 h 24 | 75 | Strong coverage |
| October | 16.9°C | -2.7°C | 41 mm | 5.5 | 11 h 04 | 42 | Strong coverage |
| November | 9.1°C | -7.5°C | 30 mm | 5.3 | 9 h 54 | 8 | Strong coverage |
| December | 1.8°C | -12.9°C | 25 mm | 5.5 | 9 h 20 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 16.1°C15 Jan 1900 | -41.7°C12 Jan 1963 | 27 mm6 Jan 2008 | 59 mm1916 · driest 0 mm in 2026 | 98 |
| February | 18.3°C11 Feb 1962 | -38.9°C18 Feb 1942 | 20 mm23 Feb 1943 | 80 mm1962 · driest 0 mm in 2026 | 98 |
| March | 28.3°C26 Mar 2026 | -31.1°C1 Mar 1903 | 38 mm25 Mar 1899 | 108 mm1893 · driest 2 mm in 2026 | 99 |
| April | 30.0°C26 Apr 1894 | -20.6°C4 Apr 1945 | 29 mm10 Apr 1997 | 105 mm1906 · driest 6 mm in 2020 | 98 |
| May | 33.9°C27 May 1900 | -11.1°C20 May 1896 | 56 mm21 May 1916 | 142 mm1995 · driest 2 mm in 2002 | 98 |
| June | 38.9°C27 Jun 1900 | -8.3°C10 Jun 2007 | 33 mm2 Jun 1943 | 106 mm1969 · driest 0 mm in 1919 | 97 |
| July | 39.4°C11 Jul 1900 | -5.0°C2 Jul 2007 | 45 mm24 Jul 1997 | 103 mm1953 · driest 3 mm in 1915 | 95 |
| August | 37.2°C1 Aug 1900 | -1.7°C31 Aug 1908 | 82 mm10 Aug 1925 | 164 mm1925 · driest 1 mm in 1894 | 94 |
| September | 34.4°C1 Sep 1954 | -10.0°C25 Sep 1926 | 51 mm15 Sep 1906 | 152 mm1961 · driest 0 mm in 1942 | 94 |
| October | 30.0°C4 Oct 1947 | -27.2°C27 Oct 2020 | 48 mm5 Oct 1911 | 117 mm1899 · driest 0 mm in 1952 | 93 |
| November | 23.3°C8 Nov 1999 | -31.7°C13 Nov 1916 | 25 mm28 Nov 1919 | 67 mm1996 · driest 0 mm in 1904 | 94 |
| December | 17.2°C2 Dec 1995 | -37.8°C24 Dec 1924 | 33 mm8 Dec 1926 | 79 mm2007 · driest 3 mm in 1917 | 93 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 7 |
| February | 0 | 0 | 27 | <1 | 5 |
| March | 0 | 0 | 29 | <1 | 4 |
| April | <1 | 0 | 23 | 1 | 2 |
| May | 6 | <1 | 12 | 1 | <1 |
| June | 21 | 7 | 2 | <1 | 0 |
| July | 29 | 19 | <1 | <1 | 0 |
| August | 28 | 12 | <1 | <1 | 0 |
| September | 16 | 2 | 7 | 1 | <1 |
| October | 3 | 0 | 23 | 1 | 1 |
| November | 0 | 0 | 28 | <1 | 5 |
| December | 0 | 0 | 29 | <1 | 6 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 20% | 2% | 19% | -0.9–4.9°C |
| February | 0% | 21% | 2% | 20% | 1.6–7.5°C |
| March | 2% | 23% | 2% | 23% | 6.1–12.0°C |
| April | 21% | 24% | 4% | 26% | 11.5–17.7°C |
| May | 55% | 21% | 3% | 21% | 17.3–23.2°C |
| June | 82% | 15% | 3% | 13% | 23.6–29.0°C |
| July | 81% | 19% | 3% | 17% | 27.6–31.8°C |
| August | 76% | 24% | 4% | 23% | 26.4–30.3°C |
| September | 74% | 17% | 4% | 16% | 21.7–26.4°C |
| October | 37% | 16% | 4% | 14% | 14.1–20.4°C |
| November | 2% | 18% | 2% | 15% | 6.2–12.6°C |
| December | 0% | 20% | 2% | 17% | -0.5–5.8°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