May
May · October · June
United States · 1991–2020
May leads for comfortable weather in Corte Madera: typically 23.4°C by day, 9.8°C at night, with 35 mm of rain. Based on measured 1991–2020 NOAA station history.
May · October · June
August · July · September
May · April · October
The weakest month is December, scoring 13 against May’s 89 — days reach only 14°C, 10° below the 24°C the score treats as ideal, and 252 mm of rain falls.
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 | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 14.1°C | 5.5°C | 218 mm | 10.3 | 11.6°C | 9 h 48 | 18 | Strong coverage |
| February | 16.6°C | 6.3°C | 221 mm | 9.8 | 11.9°C | 10 h 43 | 28 | Strong coverage |
| March | 18.8°C | 6.9°C | 153 mm | 9 | 12.0°C | 11 h 50 | 46 | Strong coverage |
| April | 20.8°C | 8°C | 65 mm | 5 | 11.5°C | 13 h 07 | 71 | Strong coverage |
| May | 23.4°C | 9.8°C | 35 mm | 3.1 | 11.7°C | 14 h 12 | 89 | Strong coverage |
| June | 26.8°C | 11.2°C | 9 mm | 0.8 | 12.1°C | 14 h 47 | 84 | Strong coverage |
| July | 28.5°C | 11.9°C | 0 mm | 0 | 13.4°C | 14 h 33 | 80 | Strong coverage |
| August | 28.6°C | 12.1°C | 1 mm | 0.1 | 14.2°C | 13 h 38 | 80 | Strong coverage |
| September | 28.2°C | 11.6°C | 2 mm | 0.4 | 14.4°C | 12 h 23 | 80 | Strong coverage |
| October | 24.6°C | 10°C | 53 mm | 2.8 | 13.7°C | 11 h 09 | 87 | Strong coverage |
| November | 18°C | 7.5°C | 119 mm | 6.4 | 12.9°C | 10 h 04 | 52 | Strong coverage |
| December | 14°C | 5.4°C | 252 mm | 10 | 12.0°C | 9 h 33 | 13 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.1°C9 Jan 1962 | -7.8°C9 Jan 1937 | 294 mm21 Jan 1967 | 798 mm1909 · driest 0 mm in 2015 | 124 |
| February | 28.9°C14 Feb 1930 | -6.1°C1 Feb 1917 | 220 mm12 Feb 1904 | 720 mm1902 · driest 0 mm in 2020 | 125 |
| March | 32.8°C28 Mar 1923 | -3.9°C2 Mar 1917 | 123 mm23 Mar 1928 | 577 mm1983 · driest 1 mm in 1923 | 124 |
| April | 36.1°C28 Apr 1921 | -1.7°C6 Apr 1929 | 126 mm7 Apr 1935 | 233 mm1958 · driest 0 mm in 1949 | 125 |
| May | 38.9°C31 May 2001 | 0.6°C5 May 1952 | 106 mm25 May 1906 | 246 mm1915 · driest 0 mm in 2021 | 123 |
| June | 43.3°C14 Jun 2000 | 2.8°C10 Jun 1932 | 49 mm2 Jun 1967 | 87 mm1967 · driest 0 mm in 1926 | 125 |
| July | 44.4°C11 Jul 1913 | 3.9°C31 Jul 1919 | 62 mm8 Jul 1974 | 84 mm1974 · driest 0 mm in 1972 | 121 |
| August | 41.1°C1 Aug 1993 | 2.8°C22 Aug 1917 | 31 mm20 Aug 1997 | 44 mm1976 · driest 0 mm in 1904 | 121 |
| September | 43.3°C6 Sep 2022 | 1.1°C27 Sep 1926 | 98 mm18 Sep 1959 | 142 mm1904 · driest 0 mm in 2021 | 124 |
| October | 38.9°C6 Oct 2024 | -2.2°C31 Oct 1935 | 282 mm24 Oct 2021 | 517 mm2021 · driest 0 mm in 1913 | 122 |
| November | 31.7°C17 Nov 1932 | -3.9°C23 Nov 1931 | 202 mm5 Nov 1994 | 661 mm1973 · driest 0 mm in 1929 | 123 |
| December | 26.1°C3 Dec 1927 | -8.3°C31 Dec 1915 | 204 mm10 Dec 1937 | 825 mm1955 · driest 0 mm in 1989 | 122 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 2 | 6 |
| February | <1 | 0 | <1 | 6 |
| March | 3 | 0 | 0 | 5 |
| April | 6 | 1 | 0 | 2 |
| May | 10 | 4 | 0 | 1 |
| June | 17 | 7 | 0 | <1 |
| July | 25 | 9 | 0 | 0 |
| August | 24 | 10 | 0 | 0 |
| September | 21 | 10 | 0 | <1 |
| October | 14 | 4 | 0 | 1 |
| November | 1 | 0 | <1 | 3 |
| December | 0 | 0 | 2 | 7 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 2% | 37% | 22% | 45% | 11.2–15.3°C |
| February | 13% | 34% | 20% | 41% | 13.9–18.3°C |
| March | 33% | 30% | 15% | 36% | 15.8–21.4°C |
| April | 54% | 19% | 8% | 17% | 18.3–23.3°C |
| May | 75% | 10% | 3% | 7% | 20.6–25.8°C |
| June | 93% | 3% | <1% | <1% | 23.9–28.5°C |
| July | 99% | <1% | <1% | 0% | 26.8–30.4°C |
| August | 99% | <1% | <1% | <1% | 26.1–30.0°C |
| September | 94% | 4% | 1% | 3% | 25.5–29.7°C |
| October | 77% | 11% | 5% | 11% | 21.6–26.5°C |
| November | 27% | 24% | 14% | 29% | 15.7–20.3°C |
| December | 3% | 32% | 19% | 40% | 11.6–15.6°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