September
September · May · August
United States · 1991–2020
September leads for comfortable weather in Arthur: typically 27.1°C by day, 15.2°C at night, with 104 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · August
August · July · June
October · April · September
The weakest month is January, scoring 5 against September’s 77 — days reach only 4.9°C, 19° 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 | 4.9°C | -4.8°C | 88 mm | 7.8 | 9 h 46 | 5 | Good coverage |
| February | 6.6°C | -3.7°C | 79 mm | 7.3 | 10 h 42 | 5 | Good coverage |
| March | 13.3°C | 1.8°C | 148 mm | 9.8 | 11 h 50 | 19 | Good coverage |
| April | 19.8°C | 8°C | 161 mm | 9.3 | 13 h 08 | 50 | Good coverage |
| May | 24.1°C | 13.2°C | 160 mm | 9.9 | 14 h 14 | 73 | Good coverage |
| June | 28.7°C | 18°C | 129 mm | 8.2 | 14 h 49 | 61 | Good coverage |
| July | 30.3°C | 19.7°C | 135 mm | 7.8 | 14 h 35 | 53 | Good coverage |
| August | 30°C | 18.9°C | 82 mm | 5.5 | 13 h 39 | 64 | Good coverage |
| September | 27.1°C | 15.2°C | 104 mm | 5.6 | 12 h 23 | 77 | Good coverage |
| October | 20.3°C | 8.4°C | 99 mm | 7 | 11 h 08 | 63 | Good coverage |
| November | 13°C | 2.6°C | 117 mm | 7.2 | 10 h 02 | 26 | Good coverage |
| December | 7.4°C | -1.6°C | 117 mm | 9.3 | 9 h 30 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C30 Jan 2002 | -21.7°C22 Jan 2025 | 83 mm13 Jan 2013 | 179 mm2013 · driest 41 mm in 1996 | 23 |
| February | 24.4°C27 Feb 2024 | -23.3°C4 Feb 1996 | 62 mm16 Feb 2023 | 205 mm2022 · driest 14 mm in 2017 | 23 |
| March | 28.9°C26 Mar 2007 | -14.4°C6 Mar 2015 | 138 mm19 Mar 2008 | 348 mm2008 · driest 44 mm in 2024 | 23 |
| April | 30.6°C15 Apr 2010 | -6.7°C7 Apr 1996 | 185 mm29 Apr 2017 | 354 mm2011 · driest 36 mm in 2012 | 23 |
| May | 33.9°C29 May 2006 | 1.7°C9 May 2020 | 117 mm2 May 2011 | 291 mm2004 · driest 40 mm in 2007 | 23 |
| June | 40.0°C29 Jun 2012 | 5.6°C1 Jun 2003 | 138 mm30 Jun 2023 | 300 mm2019 · driest 19 mm in 2012 | 23 |
| July | 40.0°C8 Jul 2012 | 10.6°C5 Jul 1997 | 132 mm4 Jul 2016 | 278 mm2016 · driest 24 mm in 2002 | 23 |
| August | 39.4°C16 Aug 2007 | 8.3°C27 Aug 2025 | 81 mm10 Aug 2012 | 236 mm2014 · driest 11 mm in 2013 | 25 |
| September | 37.2°C5 Sep 2007 | 1.7°C28 Sep 2022 | 155 mm9 Sep 2018 | 261 mm2012 · driest 0 mm in 2019 | 25 |
| October | 36.7°C5 Oct 2005 | -5.0°C20 Oct 2022 | 99 mm6 Oct 2013 | 218 mm2004 · driest 1 mm in 2024 | 23 |
| November | 27.8°C2 Nov 2016 | -12.8°C14 Nov 2019 | 70 mm30 Nov 2019 | 229 mm2010 · driest 21 mm in 2023 | 24 |
| December | 22.8°C25 Dec 2021 | -23.9°C23 Dec 2022 | 79 mm17 Dec 2001 | 184 mm2024 · driest 42 mm in 2010 | 22 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 3 | 2 |
| February | 0 | 0 | 21 | 3 | 2 |
| March | 2 | 0 | 13 | 4 | <1 |
| April | 7 | <1 | 2 | 5 | 0 |
| May | 15 | 4 | 0 | 5 | 0 |
| June | 26 | 13 | 0 | 4 | 0 |
| July | 28 | 18 | 0 | 4 | 0 |
| August | 28 | 16 | 0 | 3 | 0 |
| September | 21 | 9 | 0 | 3 | 0 |
| October | 7 | 1 | <1 | 3 | 0 |
| November | <1 | 0 | 10 | 4 | <1 |
| December | 0 | 0 | 19 | 4 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 27% | 10% | 29% | 1.7–8.0°C |
| February | 2% | 25% | 10% | 26% | 3.1–11.5°C |
| March | 14% | 31% | 14% | 37% | 10.0–17.1°C |
| April | 34% | 32% | 15% | 41% | 18.0–21.4°C |
| May | 54% | 33% | 15% | 37% | 21.9–26.3°C |
| June | 73% | 27% | 13% | 31% | 27.0–30.3°C |
| July | 73% | 28% | 14% | 31% | 28.0–32.1°C |
| August | 81% | 19% | 9% | 18% | 28.0–32.0°C |
| September | 78% | 19% | 11% | 19% | 24.9–29.5°C |
| October | 46% | 23% | 11% | 21% | 18.2–23.2°C |
| November | 14% | 24% | 11% | 28% | 8.5–16.1°C |
| December | 1% | 30% | 14% | 35% | 5.4–10.8°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