September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Yerba: typically 25.1°C by day, 13.3°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · April · September
The weakest month is January, scoring 5 against September’s 82 — days reach only 5.4°C, 19° 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 | 5.4°C | -4.5°C | 100 mm | 11.3 | 9 h 50 | 5 | Strong coverage |
| February | 7.7°C | -3.4°C | 78 mm | 10.4 | 10 h 45 | 5 | Strong coverage |
| March | 13.1°C | -0.1°C | 108 mm | 11.7 | 11 h 50 | 19 | Strong coverage |
| April | 20°C | 4.9°C | 112 mm | 11.2 | 13 h 06 | 50 | Strong coverage |
| May | 23.7°C | 10.4°C | 128 mm | 11.1 | 14 h 10 | 70 | Strong coverage |
| June | 27.3°C | 15.5°C | 120 mm | 11 | 14 h 44 | 69 | Strong coverage |
| July | 28.7°C | 17.8°C | 140 mm | 11.7 | 14 h 31 | 57 | Strong coverage |
| August | 28.3°C | 17.4°C | 105 mm | 9.3 | 13 h 36 | 66 | Strong coverage |
| September | 25.1°C | 13.3°C | 84 mm | 7.3 | 12 h 23 | 82 | Strong coverage |
| October | 19.3°C | 6.3°C | 67 mm | 7.4 | 11 h 10 | 60 | Strong coverage |
| November | 12.9°C | 0.5°C | 72 mm | 8.6 | 10 h 06 | 27 | Strong coverage |
| December | 7.1°C | -2.4°C | 98 mm | 10.8 | 9 h 35 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.1°C26 Jan 1950 | -27.2°C21 Jan 1985 | 70 mm28 Jan 1998 | 198 mm1979 · driest 8 mm in 2014 | 70 |
| February | 28.9°C22 Feb 1997 | -26.7°C5 Feb 1996 | 59 mm16 Feb 2003 | 186 mm2003 · driest 0 mm in 2014 | 70 |
| March | 30.6°C26 Mar 1954 | -21.1°C3 Mar 1980 | 89 mm12 Mar 1963 | 245 mm1975 · driest 37 mm in 1986 | 70 |
| April | 33.3°C18 Apr 1976 | -10.0°C1 Apr 1964 | 70 mm5 Apr 1977 | 213 mm1987 · driest 16 mm in 1976 | 69 |
| May | 34.4°C6 May 1950 | -3.9°C2 May 1909 | 100 mm9 May 2009 | 259 mm2009 · driest 34 mm in 1965 | 69 |
| June | 37.2°C29 Jun 1952 | -0.6°C2 Jun 1966 | 108 mm13 Jun 2010 | 253 mm2003 · driest 8 mm in 1908 | 70 |
| July | 38.3°C3 Jul 1954 | 5.6°C2 Jul 1988 | 121 mm9 Jul 2001 | 282 mm1980 · driest 1 mm in 1908 | 69 |
| August | 38.3°C5 Aug 1955 | 6.1°C30 Aug 1965 | 97 mm16 Aug 1949 | 210 mm1952 · driest 13 mm in 2007 | 72 |
| September | 38.9°C2 Sep 1953 | 0.0°C25 Sep 1963 | 71 mm30 Sep 1964 | 197 mm1966 · driest 13 mm in 1910 | 73 |
| October | 35.6°C1 Oct 1953 | -9.4°C27 Oct 1962 | 59 mm17 Oct 1989 | 192 mm1976 · driest 1 mm in 1963 | 71 |
| November | 28.9°C2 Nov 1950 | -15.6°C25 Nov 1950 | 66 mm26 Nov 1999 | 179 mm2003 · driest 7 mm in 2001 | 74 |
| December | 26.7°C5 Dec 1982 | -25.0°C24 Dec 1989 | 52 mm5 Dec 1993 | 188 mm1991 · driest 10 mm in 1965 | 71 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 3 | 3 |
| February | <1 | 0 | 21 | 2 | 2 |
| March | 2 | 0 | 17 | 4 | 1 |
| April | 8 | <1 | 5 | 4 | 0 |
| May | 15 | 2 | <1 | 5 | 0 |
| June | 23 | 7 | 0 | 4 | 0 |
| July | 27 | 11 | 0 | 5 | 0 |
| August | 26 | 9 | 0 | 4 | 0 |
| September | 16 | 4 | 0 | 3 | 0 |
| October | 5 | <1 | 3 | 2 | <1 |
| November | <1 | 0 | 15 | 2 | <1 |
| December | 0 | 0 | 21 | 3 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 1% | 36% | 10% | 49% | 2.3–9.5°C |
| February | 3% | 36% | 11% | 47% | 4.0–11.3°C |
| March | 14% | 36% | 12% | 51% | 9.8–15.8°C |
| April | 35% | 37% | 12% | 52% | 17.4–22.3°C |
| May | 54% | 36% | 14% | 49% | 21.7–27.0°C |
| June | 64% | 35% | 13% | 44% | 26.1–29.4°C |
| July | 64% | 36% | 15% | 44% | 27.7–31.6°C |
| August | 71% | 29% | 12% | 32% | 27.2–31.1°C |
| September | 70% | 25% | 10% | 27% | 23.9–28.2°C |
| October | 45% | 25% | 9% | 28% | 17.4–22.9°C |
| November | 14% | 30% | 9% | 37% | 10.5–16.4°C |
| December | 2% | 34% | 10% | 47% | 4.6–10.4°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