September
September · June · May
United States · 1991–2020
September leads for comfortable weather in Sunset: typically 25.7°C by day, 11.8°C at night, with 28 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · May
August · July · June
May · October · September
The weakest month is January, scoring 5 against September’s 88 — days reach only 2.1°C, 22° 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 | 2.1°C | -6°C | 36 mm | 6.5 | 9 h 31 | 5 | Good coverage |
| February | 5.4°C | -3.8°C | 33 mm | 6.1 | 10 h 33 | 5 | Good coverage |
| March | 11.7°C | 0.7°C | 41 mm | 6.8 | 11 h 48 | 29 | Good coverage |
| April | 15.6°C | 3.8°C | 51 mm | 7.7 | 13 h 15 | 46 | Good coverage |
| May | 21.2°C | 8.4°C | 54 mm | 6.6 | 14 h 28 | 73 | Good coverage |
| June | 27.8°C | 13.1°C | 27 mm | 3.7 | 15 h 07 | 83 | Good coverage |
| July | 33.5°C | 18.5°C | 8 mm | 2 | 14 h 52 | 62 | Good coverage |
| August | 31.7°C | 17.3°C | 19 mm | 2.6 | 13 h 49 | 71 | Good coverage |
| September | 25.7°C | 11.8°C | 28 mm | 4.2 | 12 h 25 | 88 | Good coverage |
| October | 17.3°C | 5.1°C | 38 mm | 5 | 11 h 02 | 58 | Good coverage |
| November | 9.6°C | -0.5°C | 29 mm | 5.1 | 9 h 49 | 23 | Good coverage |
| December | 2.7°C | -5.3°C | 36 mm | 6.2 | 9 h 13 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 16.7°C31 Jan 2024 | -25.0°C25 Jan 1949 | 37 mm21 Jan 2012 | 92 mm2023 · driest 8 mm in 2007 | 33 |
| February | 20.0°C4 Feb 2025 | -21.1°C2 Feb 1950 | 27 mm26 Feb 2004 | 89 mm2024 · driest 2 mm in 2022 | 33 |
| March | 27.2°C25 Mar 2026 | -13.9°C22 Mar 1952 | 45 mm23 Mar 1949 | 114 mm2023 · driest 12 mm in 2013 | 33 |
| April | 30.6°C23 Apr 2012 | -6.7°C7 Apr 1948 | 39 mm7 Apr 2011 | 101 mm1951 · driest 9 mm in 2020 | 33 |
| May | 36.7°C30 May 2020 | -2.1°C7 May 2010 | 44 mm16 May 2015 | 142 mm2011 · driest 3 mm in 2001 | 33 |
| June | 41.1°C15 Jun 2021 | 0.6°C7 Jun 2005 | 32 mm6 Jun 2007 | 109 mm1998 · driest 0 mm in 2013 | 33 |
| July | 41.1°C12 Jul 2024 | 7.8°C30 Jul 1950 | 22 mm8 Jul 2015 | 37 mm2015 · driest 0 mm in 2020 | 33 |
| August | 40.0°C2 Aug 2024 | 6.7°C27 Aug 2004 | 85 mm4 Aug 1951 | 110 mm1951 · driest 0 mm in 2002 | 32 |
| September | 40.0°C7 Sep 2022 | 0.0°C28 Sep 1999 | 34 mm1 Sep 2012 | 90 mm2016 · driest 0 mm in 2018 | 32 |
| October | 31.1°C4 Oct 2024 | -13.2°C30 Oct 2019 | 42 mm20 Oct 2004 | 138 mm2004 · driest 0 mm in 1999 | 32 |
| November | 23.3°C5 Nov 2020 | -16.0°C24 Nov 2010 | 28 mm20 Nov 1951 | 83 mm1950 · driest 3 mm in 2009 | 32 |
| December | 16.7°C17 Dec 2025 | -21.6°C9 Dec 2013 | 30 mm10 Dec 2016 | 76 mm2016 · driest 3 mm in 2011 | 32 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 |
| February | 0 | 0 | 24 | <1 |
| March | <1 | 0 | 14 | 1 |
| April | 1 | <1 | 6 | 2 |
| May | 9 | 2 | <1 | 2 |
| June | 22 | 13 | 0 | <1 |
| July | 31 | 28 | 0 | <1 |
| August | 30 | 24 | 0 | <1 |
| September | 19 | 7 | <1 | <1 |
| October | 3 | <1 | 3 | 1 |
| November | 0 | 0 | 17 | <1 |
| December | 0 | 0 | 28 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 22% | 4% | 22% | -1.3–5.4°C |
| February | <1% | 22% | 3% | 22% | 2.8–8.4°C |
| March | 7% | 24% | 4% | 26% | 8.2–13.9°C |
| April | 25% | 23% | 6% | 25% | 14.0–17.8°C |
| May | 57% | 21% | 7% | 20% | 18.9–23.5°C |
| June | 85% | 11% | 2% | 7% | 25.3–31.0°C |
| July | 94% | 6% | <1% | 5% | 32.1–35.8°C |
| August | 91% | 9% | 3% | 2% | 30.5–33.0°C |
| September | 81% | 13% | 2% | 12% | 23.9–28.3°C |
| October | 34% | 16% | 4% | 14% | 15.1–20.5°C |
| November | 3% | 18% | 3% | 19% | 6.9–12.6°C |
| December | 0% | 22% | 2% | 25% | 0.9–6.4°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