September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Cloverdale: typically 26.5°C by day, 14.4°C at night, with 116 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
August · July · June
October · April · November
The weakest month is January, scoring 5 against September’s 75 — days reach only 8°C, 16° below the 24°C the score treats as ideal, and nights drop to -3.4°C.
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 | 8°C | -3.4°C | 76 mm | 7.7 | 9 h 51 | 5 | Good coverage |
| February | 10°C | -2.3°C | 70 mm | 6.7 | 10 h 45 | 14 | Good coverage |
| March | 14.4°C | 1.2°C | 87 mm | 8.4 | 11 h 51 | 31 | Good coverage |
| April | 20.4°C | 6.2°C | 104 mm | 9.9 | 13 h 06 | 56 | Good coverage |
| May | 24.6°C | 11.5°C | 122 mm | 11.3 | 14 h 09 | 72 | Good coverage |
| June | 28.7°C | 16°C | 128 mm | 10.8 | 14 h 43 | 63 | Good coverage |
| July | 30.5°C | 18.2°C | 119 mm | 9.8 | 14 h 30 | 55 | Good coverage |
| August | 29.9°C | 17.8°C | 102 mm | 9.8 | 13 h 36 | 60 | Good coverage |
| September | 26.5°C | 14.4°C | 116 mm | 7.7 | 12 h 23 | 75 | Good coverage |
| October | 20.8°C | 7.9°C | 90 mm | 7.4 | 11 h 10 | 65 | Good coverage |
| November | 15.1°C | 1.8°C | 75 mm | 6.5 | 10 h 07 | 38 | Good coverage |
| December | 9.8°C | -1.4°C | 85 mm | 8.5 | 9 h 36 | 12 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.7°C31 Jan 2002 | -18.3°C25 Jan 2026 | 66 mm8 Jan 1998 | 219 mm1998 · driest 8 mm in 2008 | 28 |
| February | 27.8°C23 Feb 2018 | -17.2°C20 Feb 2015 | 74 mm16 Feb 2025 | 185 mm1998 · driest 17 mm in 2017 | 29 |
| March | 31.1°C30 Mar 1998 | -11.7°C6 Mar 2015 | 77 mm21 Mar 1998 | 144 mm2001 · driest 7 mm in 2006 | 29 |
| April | 32.8°C16 Apr 2026 | -3.3°C8 Apr 2007 | 80 mm18 Apr 2000 | 190 mm2020 · driest 31 mm in 2001 | 29 |
| May | 34.4°C20 May 2026 | -0.6°C10 May 2020 | 87 mm21 May 2020 | 297 mm2020 · driest 46 mm in 2007 | 29 |
| June | 38.3°C30 Jun 2012 | 3.9°C27 Jun 2017 | 102 mm27 Jun 2006 | 236 mm2006 · driest 22 mm in 1999 | 29 |
| July | 38.3°C9 Jul 2012 | 10.0°C23 Jul 2004 | 95 mm13 Jul 2015 | 268 mm2013 · driest 19 mm in 2006 | 29 |
| August | 38.3°C17 Aug 2007 | 5.6°C8 Aug 2004 | 84 mm9 Aug 2024 | 233 mm2022 · driest 37 mm in 2011 | 28 |
| September | 36.7°C14 Sep 1998 | 4.4°C22 Sep 2020 | 76 mm6 Sep 2011 | 283 mm2004 · driest 5 mm in 2005 | 28 |
| October | 35.0°C4 Oct 2019 | -4.4°C26 Oct 1998 | 84 mm8 Oct 2016 | 175 mm2006 · driest 1 mm in 2000 | 28 |
| November | 28.3°C1 Nov 2024 | -8.3°C19 Nov 2014 | 81 mm12 Nov 2020 | 163 mm2020 · driest 11 mm in 2007 | 28 |
| December | 27.2°C8 Dec 1998 | -17.2°C24 Dec 2022 | 67 mm1 Dec 2010 | 172 mm2009 · driest 15 mm in 2017 | 28 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 3 | 2 |
| February | <1 | 0 | 20 | 2 | 2 |
| March | 2 | 0 | 14 | 3 | <1 |
| April | 8 | 1 | 2 | 3 | 0 |
| May | 17 | 5 | <1 | 4 | 0 |
| June | 26 | 13 | 0 | 4 | 0 |
| July | 29 | 19 | 0 | 4 | 0 |
| August | 29 | 17 | 0 | 3 | 0 |
| September | 20 | 7 | 0 | 3 | 0 |
| October | 8 | <1 | 2 | 3 | 0 |
| November | 1 | 0 | 12 | 3 | <1 |
| December | <1 | 0 | 21 | 3 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 3% | 25% | 8% | 26% | 5.4–10.4°C |
| February | 6% | 26% | 9% | 29% | 5.7–13.1°C |
| March | 23% | 27% | 9% | 28% | 11.0–18.3°C |
| April | 43% | 32% | 11% | 40% | 18.8–23.0°C |
| May | 54% | 38% | 13% | 49% | 22.4–26.8°C |
| June | 67% | 33% | 13% | 41% | 27.1–30.2°C |
| July | 67% | 33% | 13% | 45% | 29.0–32.2°C |
| August | 68% | 32% | 11% | 37% | 28.0–31.3°C |
| September | 71% | 26% | 11% | 28% | 24.8–29.0°C |
| October | 51% | 23% | 9% | 25% | 19.1–22.9°C |
| November | 20% | 21% | 8% | 22% | 12.3–17.5°C |
| December | 4% | 27% | 10% | 29% | 7.0–13.5°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