September
September · August · May
United States · 1991–2020
September leads for comfortable weather in Atalissa: typically 25.2°C by day, 13°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.
September · August · May
July · August · June
October · May · September
The weakest month is January, scoring 5 against September’s 82 — days reach only -0.4°C, 24° 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 | -0.4°C | -9.2°C | 35 mm | 5.7 | 9 h 28 | 5 | Good coverage |
| February | 1.5°C | -7.8°C | 43 mm | 6.4 | 10 h 32 | 5 | Good coverage |
| March | 8.9°C | -1.4°C | 59 mm | 7.1 | 11 h 48 | 14 | Good coverage |
| April | 16.5°C | 4.8°C | 95 mm | 9 | 13 h 16 | 43 | Good coverage |
| May | 22.4°C | 11°C | 128 mm | 10 | 14 h 30 | 68 | Good coverage |
| June | 27.4°C | 16.6°C | 143 mm | 10.3 | 15 h 10 | 64 | Good coverage |
| July | 29.3°C | 18.6°C | 112 mm | 7.1 | 14 h 54 | 61 | Good coverage |
| August | 28.2°C | 17.2°C | 97 mm | 6.9 | 13 h 51 | 70 | Good coverage |
| September | 25.2°C | 13°C | 89 mm | 6.6 | 12 h 25 | 82 | Good coverage |
| October | 17.6°C | 6.3°C | 77 mm | 7.1 | 11 h 01 | 54 | Good coverage |
| November | 10.1°C | 0.1°C | 47 mm | 5.5 | 9 h 47 | 24 | Good coverage |
| December | 2.1°C | -6.3°C | 55 mm | 6.2 | 9 h 11 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 17.8°C9 Jan 2003 | -31.7°C31 Jan 2019 | 54 mm29 Jan 2006 | 78 mm2019 · driest 8 mm in 2003 | 27 |
| February | 24.4°C28 Feb 2024 | -31.7°C1 Feb 2019 | 45 mm9 Feb 2001 | 120 mm2001 · driest 2 mm in 2026 | 28 |
| March | 30.6°C22 Mar 2026 | -23.3°C4 Mar 2014 | 42 mm5 Mar 2004 | 138 mm2009 · driest 12 mm in 2001 | 28 |
| April | 31.1°C30 Apr 2007 | -9.4°C8 Apr 2018 | 101 mm18 Apr 2013 | 214 mm2013 · driest 25 mm in 2018 | 28 |
| May | 36.1°C29 May 2018 | -1.1°C4 May 2005 | 65 mm11 May 2008 | 227 mm2019 · driest 50 mm in 2026 | 28 |
| June | 37.2°C28 Jun 2009 | 6.7°C12 Jun 2023 | 112 mm22 Jun 2018 | 271 mm2010 · driest 50 mm in 2005 | 28 |
| July | 39.4°C8 Jul 2012 | 10.6°C30 Jul 2013 | 135 mm1 Jul 2014 | 334 mm2025 · driest 18 mm in 2012 | 28 |
| August | 37.2°C31 Aug 2013 | 8.3°C15 Aug 2004 | 82 mm10 Aug 2025 | 206 mm2016 · driest 0 mm in 2013 | 27 |
| September | 37.2°C2 Sep 2011 | 1.7°C30 Sep 2003 | 82 mm19 Sep 2001 | 191 mm2020 · driest 8 mm in 2024 | 27 |
| October | 34.4°C4 Oct 2006 | -5.6°C19 Oct 2022 | 69 mm18 Oct 2007 | 191 mm2009 · driest 20 mm in 2005 | 27 |
| November | 26.7°C2 Nov 2000 | -17.2°C12 Nov 2019 | 50 mm27 Nov 2015 | 153 mm2015 · driest 5 mm in 1999 | 27 |
| December | 22.8°C16 Dec 2021 | -26.1°C25 Dec 2000 | 44 mm21 Dec 2006 | 127 mm2015 · driest 16 mm in 2017 | 27 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 1 | 6 |
| February | 0 | 0 | 25 | 1 | 5 |
| March | <1 | 0 | 20 | 2 | 2 |
| April | 4 | <1 | 5 | 3 | <1 |
| May | 12 | 3 | <1 | 4 | 0 |
| June | 23 | 9 | 0 | 5 | 0 |
| July | 28 | 14 | 0 | 3 | 0 |
| August | 27 | 10 | 0 | 3 | 0 |
| September | 17 | 6 | 0 | 3 | 0 |
| October | 5 | <1 | 4 | 2 | <1 |
| November | <1 | 0 | 15 | 2 | <1 |
| December | 0 | 0 | 26 | 2 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 18% | 3% | 16% | -3.3–2.6°C |
| February | 1% | 21% | 4% | 19% | -3.8–6.6°C |
| March | 7% | 23% | 7% | 24% | 6.0–13.3°C |
| April | 25% | 30% | 11% | 35% | 14.3–19.5°C |
| May | 51% | 31% | 13% | 38% | 20.1–25.0°C |
| June | 65% | 33% | 15% | 41% | 26.2–29.3°C |
| July | 76% | 24% | 11% | 23% | 27.6–31.3°C |
| August | 77% | 22% | 10% | 22% | 26.8–29.7°C |
| September | 71% | 21% | 9% | 20% | 23.3–27.4°C |
| October | 33% | 22% | 7% | 22% | 15.1–20.7°C |
| November | 8% | 18% | 5% | 16% | 6.1–13.6°C |
| December | <1% | 20% | 6% | 17% | -1.5–6.1°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