May
May · September · October
United States · 1991–2020
May leads for comfortable weather in Pleasant Hill: typically 25.4°C by day, 13.4°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.
May · September · October
June · August · July
October · April · November
The weakest month is January, scoring 10 against May’s 79 — days reach only 10.1°C, 14° below the 24°C the score treats as ideal, and nights drop to -1.2°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 | 10.1°C | -1.2°C | 100 mm | 9 | 9 h 58 | 10 | Strong coverage |
| February | 12.4°C | 0.1°C | 83 mm | 7.7 | 10 h 49 | 24 | Strong coverage |
| March | 16.7°C | 3.8°C | 109 mm | 8.8 | 11 h 51 | 40 | Strong coverage |
| April | 21.8°C | 8.1°C | 102 mm | 8.2 | 13 h 03 | 66 | Strong coverage |
| May | 25.4°C | 13.4°C | 97 mm | 7.7 | 14 h 02 | 79 | Strong coverage |
| June | 29.4°C | 18°C | 90 mm | 8.2 | 14 h 35 | 65 | Strong coverage |
| July | 31.4°C | 20.3°C | 106 mm | 9.1 | 14 h 22 | 51 | Strong coverage |
| August | 30.5°C | 19.4°C | 108 mm | 8.6 | 13 h 31 | 55 | Strong coverage |
| September | 27°C | 15.9°C | 134 mm | 6.9 | 12 h 22 | 71 | Strong coverage |
| October | 21.8°C | 9°C | 86 mm | 6.6 | 11 h 13 | 71 | Strong coverage |
| November | 16.3°C | 3.6°C | 92 mm | 6.7 | 10 h 13 | 43 | Strong coverage |
| December | 11.8°C | 0.6°C | 96 mm | 8 | 9 h 44 | 21 | 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 | 26.7°C28 Jan 1944 | -23.9°C21 Jan 1985 | 78 mm11 Jan 1984 | 253 mm1978 · driest 26 mm in 1981 | 96 |
| February | 28.3°C29 Feb 1948 | -19.4°C11 Feb 1979 | 72 mm17 Feb 1998 | 202 mm1939 · driest 5 mm in 2022 | 95 |
| March | 32.8°C17 Mar 1945 | -17.8°C3 Mar 1980 | 118 mm19 Mar 1998 | 220 mm1984 · driest 22 mm in 1982 | 95 |
| April | 33.3°C21 Apr 1985 | -7.2°C9 Apr 1972 | 76 mm25 Apr 2017 | 174 mm2008 · driest 12 mm in 1976 | 95 |
| May | 37.2°C21 May 1941 | -2.2°C11 May 1966 | 91 mm30 May 1948 | 248 mm1990 · driest 1 mm in 1936 | 96 |
| June | 40.0°C27 Jun 1954 | 2.2°C12 Jun 1972 | 86 mm5 Jun 1919 | 272 mm1982 · driest 14 mm in 1990 | 95 |
| July | 41.7°C29 Jul 1952 | 7.2°C24 Jul 1947 | 113 mm10 Jul 1959 | 324 mm1975 · driest 16 mm in 2021 | 96 |
| August | 40.6°C19 Aug 1988 | 5.6°C31 Aug 1968 | 156 mm28 Aug 2008 | 336 mm1952 · driest 32 mm in 1943 | 95 |
| September | 39.4°C1 Sep 1932 | -0.6°C28 Sep 1947 | 155 mm17 Sep 2018 | 394 mm1945 · driest 1 mm in 1985 | 94 |
| October | 35.6°C6 Oct 1954 | -8.3°C27 Oct 1962 | 187 mm15 Oct 1954 | 285 mm1990 · driest 1 mm in 2000 | 92 |
| November | 30.6°C1 Nov 1950 | -13.3°C25 Nov 1970 | 78 mm29 Nov 1934 | 304 mm1985 · driest 9 mm in 1960 | 93 |
| December | 26.1°C12 Dec 1931 | -22.2°C12 Dec 1958 | 76 mm28 Dec 1958 | 206 mm2015 · driest 7 mm in 1965 | 96 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | <1 | 0 | 19 | 3 |
| February | <1 | 0 | 15 | 3 |
| March | 3 | <1 | 9 | 4 |
| April | 10 | 1 | 1 | 3 |
| May | 19 | 5 | 0 | 3 |
| June | 26 | 15 | 0 | 3 |
| July | 29 | 22 | 0 | 3 |
| August | 28 | 18 | 0 | 3 |
| September | 21 | 8 | 0 | 4 |
| October | 9 | <1 | <1 | 2 |
| November | 1 | 0 | 9 | 3 |
| December | <1 | 0 | 16 | 3 |
The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 78); on 2011–2025 it is May (83). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 6% | 28% | 11% | 31% | 7.5–13.8°C |
| February | 11% | 28% | 12% | 31% | 9.5–15.5°C |
| March | 27% | 29% | 12% | 32% | 13.9–20.0°C |
| April | 53% | 26% | 10% | 28% | 20.2–24.3°C |
| May | 69% | 27% | 11% | 28% | 24.1–28.5°C |
| June | 72% | 27% | 11% | 32% | 27.6–31.9°C |
| July | 68% | 32% | 13% | 38% | 29.8–32.9°C |
| August | 73% | 26% | 11% | 27% | 28.9–32.6°C |
| September | 77% | 21% | 11% | 20% | 25.6–29.8°C |
| October | 61% | 19% | 8% | 17% | 20.1–24.6°C |
| November | 27% | 22% | 9% | 19% | 14.5–19.5°C |
| December | 8% | 25% | 10% | 27% | 9.3–14.6°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