September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Leola: typically 25°C by day, 13.4°C at night, with 122 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · May · April
The weakest month is January, scoring 5 against September’s 77 — days reach only 3.8°C, 20° 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 | 3.8°C | -5.2°C | 76 mm | 8.3 | 9 h 37 | 5 | Strong coverage |
| February | 5.4°C | -4.5°C | 64 mm | 7.2 | 10 h 37 | 5 | Strong coverage |
| March | 10.6°C | -0.5°C | 90 mm | 8.6 | 11 h 49 | 15 | Strong coverage |
| April | 17.6°C | 4.9°C | 90 mm | 8.6 | 13 h 12 | 48 | Strong coverage |
| May | 23.1°C | 10.4°C | 93 mm | 9.7 | 14 h 22 | 74 | Strong coverage |
| June | 27.6°C | 15.6°C | 105 mm | 8.8 | 15 h 00 | 72 | Strong coverage |
| July | 30°C | 18.5°C | 121 mm | 8.7 | 14 h 45 | 57 | Strong coverage |
| August | 29°C | 17.4°C | 91 mm | 7.1 | 13 h 45 | 68 | Strong coverage |
| September | 25°C | 13.4°C | 122 mm | 7.6 | 12 h 24 | 77 | Strong coverage |
| October | 18.6°C | 6.8°C | 108 mm | 7.3 | 11 h 04 | 53 | Strong coverage |
| November | 12.1°C | 1.3°C | 83 mm | 6.6 | 9 h 54 | 26 | Strong coverage |
| December | 6.3°C | -2.5°C | 89 mm | 8.3 | 9 h 20 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.1°C29 Jan 2002 | -26.7°C21 Jan 1994 | 52 mm9 Jan 2024 | 168 mm1979 · driest 7 mm in 1981 | 50 |
| February | 27.8°C21 Feb 2018 | -22.8°C18 Feb 1979 | 48 mm6 Feb 2004 | 134 mm2018 · driest 7 mm in 2002 | 50 |
| March | 31.1°C30 Mar 1998 | -18.9°C10 Mar 1984 | 82 mm21 Mar 2000 | 176 mm1993 · driest 21 mm in 2006 | 50 |
| April | 33.9°C17 Apr 2002 | -8.9°C7 Apr 1982 | 62 mm22 Apr 2006 | 216 mm1983 · driest 18 mm in 1985 | 48 |
| May | 37.2°C24 May 1995 | -6.1°C9 May 2020 | 71 mm5 May 1989 | 241 mm1989 · driest 7 mm in 2023 | 50 |
| June | 37.2°C22 Jun 2024 | 0.6°C4 Jun 2019 | 78 mm1 Jun 2012 | 234 mm1982 · driest 21 mm in 1988 | 49 |
| July | 39.4°C22 Jul 2011 | 7.8°C1 Jul 1986 | 115 mm7 Jul 1984 | 279 mm2014 · driest 26 mm in 2002 | 49 |
| August | 38.3°C2 Aug 2002 | 2.8°C30 Aug 1986 | 117 mm28 Aug 1978 | 307 mm1978 · driest 13 mm in 1995 | 49 |
| September | 37.2°C2 Sep 1980 | 1.1°C18 Sep 1986 | 155 mm16 Sep 1999 | 323 mm1999 · driest 20 mm in 2007 | 48 |
| October | 33.9°C2 Oct 2019 | -5.0°C31 Oct 1988 | 142 mm8 Oct 2005 | 273 mm2005 · driest 1 mm in 2024 | 48 |
| November | 30.0°C3 Nov 2003 | -11.7°C23 Nov 2018 | 70 mm16 Nov 2006 | 201 mm2018 · driest 15 mm in 1976 | 49 |
| December | 24.4°C7 Dec 1998 | -19.4°C26 Dec 1980 | 66 mm12 Dec 1983 | 225 mm1983 · driest 15 mm in 1998 | 50 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 3 | 3 |
| February | 0 | 0 | 23 | 2 | 3 |
| March | <1 | 0 | 18 | 3 | 1 |
| April | 4 | <1 | 4 | 3 | <1 |
| May | 12 | 4 | <1 | 3 | 0 |
| June | 24 | 9 | 0 | 4 | 0 |
| July | 29 | 17 | 0 | 4 | 0 |
| August | 28 | 13 | 0 | 3 | 0 |
| September | 16 | 4 | 0 | 4 | 0 |
| October | 4 | <1 | 2 | 3 | 0 |
| November | <1 | 0 | 13 | 3 | <1 |
| December | 0 | 0 | 23 | 3 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 27% | 8% | 30% | 0.6–6.9°C |
| February | 1% | 26% | 8% | 29% | 2.3–8.8°C |
| March | 9% | 27% | 9% | 32% | 7.9–14.4°C |
| April | 27% | 29% | 10% | 35% | 15.7–19.8°C |
| May | 53% | 33% | 12% | 42% | 20.6–25.3°C |
| June | 70% | 29% | 11% | 34% | 26.1–29.2°C |
| July | 72% | 28% | 12% | 29% | 27.9–32.0°C |
| August | 76% | 24% | 10% | 22% | 27.4–30.5°C |
| September | 69% | 24% | 10% | 25% | 23.3–27.0°C |
| October | 35% | 24% | 9% | 24% | 16.8–20.9°C |
| November | 8% | 24% | 9% | 25% | 9.9–14.7°C |
| December | 1% | 26% | 10% | 28% | 3.3–9.8°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