September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Anderson: typically 25.6°C by day, 15.1°C at night, with 122 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · April · May
The weakest month is January, scoring 5 against September’s 78 — days reach only 6.2°C, 18° 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 | 6.2°C | -2.9°C | 147 mm | 11.5 | 9 h 57 | 5 | Strong coverage |
| February | 8.5°C | -1°C | 145 mm | 10.4 | 10 h 49 | 5 | Strong coverage |
| March | 13.8°C | 3.2°C | 153 mm | 11.5 | 11 h 51 | 21 | Good coverage |
| April | 19.1°C | 7.8°C | 148 mm | 10.2 | 13 h 04 | 49 | Strong coverage |
| May | 23.7°C | 12.9°C | 138 mm | 10.8 | 14 h 04 | 74 | Strong coverage |
| June | 27.3°C | 17.1°C | 140 mm | 10.3 | 14 h 36 | 64 | Strong coverage |
| July | 28.9°C | 18.9°C | 142 mm | 9.9 | 14 h 24 | 56 | Strong coverage |
| August | 28.6°C | 18.6°C | 114 mm | 8.6 | 13 h 32 | 62 | Strong coverage |
| September | 25.6°C | 15.1°C | 122 mm | 7.4 | 12 h 22 | 78 | Strong coverage |
| October | 19.9°C | 8.7°C | 94 mm | 7.7 | 11 h 12 | 63 | Strong coverage |
| November | 13.3°C | 3.2°C | 120 mm | 8.6 | 10 h 12 | 26 | Strong coverage |
| December | 8.1°C | -0.6°C | 172 mm | 11.1 | 9 h 42 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.9°C11 Jan 1949 | -21.1°C7 Jan 2014 | 115 mm5 Jan 1949 | 410 mm1950 · driest 13 mm in 1905 | 40 |
| February | 25.6°C24 Feb 2023 | -23.9°C2 Feb 1951 | 119 mm6 Feb 2004 | 373 mm2019 · driest 32 mm in 1906 | 41 |
| March | 28.9°C22 Mar 2026 | -16.7°C6 Mar 2015 | 144 mm28 Mar 2021 | 421 mm1975 · driest 41 mm in 2007 | 43 |
| April | 30.0°C12 Apr 1906 | -7.8°C8 Apr 2007 | 99 mm25 Apr 2002 | 329 mm2011 · driest 39 mm in 1948 | 44 |
| May | 32.2°C31 May 2011 | -0.6°C9 May 2020 | 107 mm6 May 2003 | 331 mm2003 · driest 60 mm in 1951 | 43 |
| June | 39.4°C30 Jun 2012 | 5.6°C2 Jun 2001 | 88 mm16 Jun 2011 | 326 mm1998 · driest 36 mm in 2012 | 42 |
| July | 38.9°C1 Jul 2012 | 10.6°C6 Jul 1972 | 110 mm14 Jul 2019 | 321 mm2009 · driest 22 mm in 1997 | 44 |
| August | 37.2°C24 Aug 2007 | 9.4°C13 Aug 2004 | 83 mm19 Aug 2021 | 192 mm2018 · driest 12 mm in 1953 | 44 |
| September | 37.2°C6 Sep 1954 | 1.7°C14 Sep 2015 | 151 mm6 Sep 2011 | 301 mm2018 · driest 14 mm in 2008 | 46 |
| October | 33.9°C2 Oct 2019 | -5.6°C11 Oct 1906 | 133 mm7 Oct 2021 | 277 mm2014 · driest 2 mm in 2000 | 45 |
| November | 27.8°C2 Nov 2016 | -21.7°C25 Nov 1950 | 84 mm28 Nov 2011 | 269 mm1948 · driest 37 mm in 2025 | 40 |
| December | 22.8°C28 Dec 2015 | -21.1°C24 Dec 2022 | 90 mm29 Dec 1954 | 266 mm2018 · driest 24 mm in 2025 | 41 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 21 | 5 | 3 |
| February | 0 | 0 | 17 | 5 | 3 |
| March | 1 | 0 | 11 | 5 | 1 |
| April | 6 | <1 | 3 | 5 | <1 |
| May | 15 | 1 | <1 | 5 | 0 |
| June | 24 | 7 | 0 | 5 | 0 |
| July | 29 | 13 | 0 | 5 | 0 |
| August | 29 | 11 | 0 | 4 | 0 |
| September | 19 | 5 | 0 | 4 | 0 |
| October | 6 | <1 | 2 | 4 | 0 |
| November | <1 | 0 | 10 | 4 | <1 |
| December | 0 | 0 | 18 | 5 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 36% | 16% | 47% | 3.5–10.4°C |
| February | 3% | 36% | 16% | 49% | 6.2–11.9°C |
| March | 13% | 35% | 16% | 45% | 10.8–17.0°C |
| April | 36% | 32% | 15% | 41% | 16.9–21.8°C |
| May | 55% | 32% | 14% | 43% | 22.1–25.4°C |
| June | 67% | 31% | 14% | 38% | 25.7–28.8°C |
| July | 68% | 31% | 14% | 38% | 27.0–30.8°C |
| August | 73% | 27% | 12% | 29% | 27.2–30.3°C |
| September | 71% | 24% | 12% | 23% | 23.7–28.4°C |
| October | 48% | 22% | 9% | 24% | 18.4–22.3°C |
| November | 12% | 28% | 13% | 34% | 9.8–16.6°C |
| December | 1% | 33% | 15% | 43% | 5.7–11.7°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