August
August · September · June
United States · 1991–2020
August leads for comfortable weather in Sanborn: typically 26.6°C by day, 15.3°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.
August · September · June
July · August · June
September · May · October
The weakest month is January, scoring 5 against August’s 79 — days reach only -4.6°C, 29° 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 | -4.6°C | -14.5°C | 23 mm | 4.9 | 9 h 19 | 5 | Strong coverage |
| February | -2.1°C | -12.2°C | 28 mm | 4.7 | 10 h 27 | 5 | Strong coverage |
| March | 5.2°C | -5.6°C | 47 mm | 6.1 | 11 h 47 | 5 | Strong coverage |
| April | 13.5°C | 1°C | 86 mm | 8.3 | 13 h 20 | 28 | Strong coverage |
| May | 20.3°C | 8.3°C | 114 mm | 11.7 | 14 h 39 | 57 | Strong coverage |
| June | 25.9°C | 14.4°C | 123 mm | 9.9 | 15 h 22 | 74 | Strong coverage |
| July | 28°C | 16.6°C | 86 mm | 7 | 15 h 05 | 73 | Strong coverage |
| August | 26.6°C | 15.3°C | 89 mm | 7.6 | 13 h 57 | 79 | Strong coverage |
| September | 23°C | 10.1°C | 84 mm | 7.2 | 12 h 27 | 77 | Strong coverage |
| October | 15.3°C | 2.8°C | 63 mm | 6.4 | 10 h 57 | 42 | Strong coverage |
| November | 6.1°C | -4.8°C | 40 mm | 4.5 | 9 h 39 | 5 | Strong coverage |
| December | -1.8°C | -11°C | 29 mm | 5 | 9 h | 5 | 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 | 18.3°C27 Jan 2002 | -36.1°C15 Jan 1972 | 34 mm31 Jan 1926 | 68 mm1926 · driest 0 mm in 1928 | 110 |
| February | 20.6°C27 Feb 2024 | -37.2°C2 Feb 1917 | 34 mm1 Feb 1922 | 80 mm1919 · driest 0 mm in 2026 | 111 |
| March | 31.1°C22 Mar 2026 | -28.9°C11 Mar 1948 | 64 mm16 Mar 1917 | 112 mm1965 · driest 1 mm in 1994 | 110 |
| April | 33.3°C30 Apr 1926 | -16.1°C3 Apr 1936 | 66 mm29 Apr 1947 | 176 mm1927 · driest 9 mm in 1926 | 111 |
| May | 41.7°C30 May 1934 | -8.9°C3 May 1967 | 128 mm26 May 2013 | 276 mm2013 · driest 5 mm in 1934 | 112 |
| June | 38.9°C10 Jun 1933 | 1.1°C9 Jun 1915 | 150 mm14 Jun 2018 | 380 mm2018 · driest 14 mm in 2012 | 112 |
| July | 43.3°C17 Jul 1936 | 3.3°C30 Jul 1971 | 168 mm22 Jul 2010 | 279 mm2010 · driest 9 mm in 2006 | 112 |
| August | 42.2°C3 Aug 1930 | 1.1°C24 Aug 1934 | 104 mm6 Aug 1995 | 263 mm1974 · driest 16 mm in 1999 | 112 |
| September | 39.4°C3 Sep 1925 | -5.6°C30 Sep 1939 | 164 mm20 Sep 2018 | 281 mm2004 · driest 6 mm in 1940 | 112 |
| October | 33.3°C5 Oct 1963 | -16.7°C28 Oct 1925 | 78 mm7 Oct 2017 | 169 mm2019 · driest 0 mm in 1952 | 112 |
| November | 25.0°C9 Nov 1999 | -26.7°C14 Nov 1959 | 72 mm12 Nov 2015 | 156 mm2015 · driest 0 mm in 1939 | 112 |
| December | 18.3°C6 Dec 1939 | -33.9°C22 Dec 1989 | 48 mm25 Dec 1945 | 92 mm1945 · driest 1 mm in 1943 | 112 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 | 5 |
| February | 0 | 0 | 28 | <1 | 5 |
| March | <1 | 0 | 26 | 2 | 3 |
| April | 2 | <1 | 13 | 3 | 2 |
| May | 8 | 2 | 1 | 4 | <1 |
| June | 19 | 7 | 0 | 4 | 0 |
| July | 25 | 10 | 0 | 3 | 0 |
| August | 22 | 5 | 0 | 3 | 0 |
| September | 13 | 2 | <1 | 2 | 0 |
| October | 3 | <1 | 11 | 2 | <1 |
| November | <1 | 0 | 25 | 1 | 3 |
| December | 0 | 0 | 31 | 1 | 5 |
The best month has moved. On the 1961–1990 numbers the strongest month here was August (scoring 80); on 2011–2025 it is September (88). 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 | 0% | 13% | 1% | 6% | -8.7–0.7°C |
| February | 0% | 14% | 2% | 8% | -6.3–3.2°C |
| March | 4% | 18% | 5% | 15% | 0.8–10.0°C |
| April | 20% | 26% | 9% | 29% | 10.8–17.8°C |
| May | 45% | 32% | 11% | 41% | 18.7–24.4°C |
| June | 65% | 32% | 12% | 38% | 24.4–28.9°C |
| July | 76% | 24% | 9% | 24% | 27.1–31.5°C |
| August | 75% | 24% | 9% | 24% | 25.6–30.1°C |
| September | 60% | 24% | 9% | 25% | 20.7–25.7°C |
| October | 30% | 18% | 5% | 15% | 13.5–19.5°C |
| November | 3% | 14% | 4% | 9% | 2.5–9.7°C |
| December | 0% | 13% | 3% | 8% | -5.6–2.3°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