April
April · October · May
United States · 1991–2020
April leads for comfortable weather in Biola: typically 23.2°C by day, 8.4°C at night, with 21 mm of rain. Based on measured 1991–2020 NOAA station history.
April · October · May
June · September · May
March · April · November
The weakest month is January, scoring 36 against April’s 85 — days reach only 13°C, 11° 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 | 13°C | 3.1°C | 54 mm | 6.3 | 9 h 54 | 36 | Strong coverage |
| February | 16.4°C | 4.4°C | 53 mm | 6.5 | 10 h 47 | 50 | Strong coverage |
| March | 19.8°C | 6.4°C | 45 mm | 5 | 11 h 51 | 67 | Strong coverage |
| April | 23.2°C | 8.4°C | 21 mm | 2.6 | 13 h 05 | 85 | Strong coverage |
| May | 28°C | 11.9°C | 11 mm | 1.4 | 14 h 07 | 81 | Strong coverage |
| June | 32.6°C | 15.2°C | 3 mm | 0.5 | 14 h 40 | 71 | Strong coverage |
| July | 36°C | 17.9°C | 0 mm | 0 | 14 h 27 | 55 | Strong coverage |
| August | 35.2°C | 17.2°C | 0 mm | 0.1 | 13 h 34 | 59 | Strong coverage |
| September | 32.2°C | 14.5°C | 2 mm | 0.3 | 12 h 22 | 72 | Strong coverage |
| October | 26°C | 9.7°C | 14 mm | 1.5 | 11 h 11 | 84 | Strong coverage |
| November | 18.3°C | 5°C | 26 mm | 3.1 | 10 h 09 | 63 | Strong coverage |
| December | 12.9°C | 2.1°C | 50 mm | 5.4 | 9 h 39 | 36 | 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 | 23.9°C16 Jan 1974 | -9.4°C10 Jan 1949 | 56 mm2 Jan 2006 | 145 mm1969 · driest 0 mm in 2015 | 92 |
| February | 28.3°C18 Feb 1930 | -6.1°C13 Feb 1949 | 40 mm10 Feb 1978 | 156 mm2000 · driest 0 mm in 2018 | 91 |
| March | 32.2°C22 Mar 1960 | -4.4°C3 Mar 1951 | 58 mm7 Mar 2016 | 181 mm1991 · driest 0 mm in 2018 | 91 |
| April | 37.2°C20 Apr 1934 | -1.7°C21 Apr 1963 | 70 mm11 Apr 2016 | 139 mm1967 · driest 0 mm in 2018 | 91 |
| May | 41.7°C31 May 1950 | 0.0°C9 May 2013 | 66 mm6 May 2005 | 84 mm2005 · driest 0 mm in 1937 | 91 |
| June | 46.1°C25 Jun 1957 | 3.3°C26 Jun 1933 | 22 mm7 Jun 1931 | 22 mm1931 · driest 0 mm in 1951 | 89 |
| July | 46.7°C13 Jul 1961 | 5.6°C1 Jul 1963 | 10 mm29 Jul 1958 | 10 mm1958 · driest 0 mm in 2017 | 91 |
| August | 45.0°C14 Aug 1933 | 5.0°C23 Aug 1960 | 5 mm19 Aug 1945 | 7 mm1976 · driest 0 mm in 1956 | 90 |
| September | 46.1°C3 Sep 1955 | 1.1°C30 Sep 1950 | 41 mm19 Sep 1959 | 43 mm1959 · driest 0 mm in 1957 | 93 |
| October | 38.3°C16 Oct 1961 | -4.4°C19 Oct 1949 | 40 mm28 Oct 1987 | 99 mm2004 · driest 0 mm in 1949 | 92 |
| November | 33.3°C1 Nov 1949 | -5.6°C25 Nov 1931 | 50 mm21 Nov 1978 | 108 mm1965 · driest 0 mm in 1995 | 92 |
| December | 23.9°C16 Dec 1958 | -8.9°C12 Dec 1932 | 60 mm20 Dec 2010 | 148 mm1955 · driest 0 mm in 1958 | 91 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 7 | 2 |
| February | <1 | 0 | 3 | 2 |
| March | 3 | <1 | <1 | 2 |
| April | 11 | 3 | <1 | <1 |
| May | 22 | 11 | 0 | <1 |
| June | 26 | 20 | 0 | 0 |
| July | 29 | 28 | 0 | 0 |
| August | 30 | 29 | 0 | 0 |
| September | 27 | 21 | 0 | 0 |
| October | 18 | 6 | 0 | <1 |
| November | 1 | 0 | 3 | <1 |
| December | 0 | 0 | 11 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 3% | 21% | 6% | 24% | 10.1–14.9°C |
| February | 15% | 22% | 6% | 26% | 14.6–18.4°C |
| March | 47% | 19% | 5% | 17% | 17.6–21.9°C |
| April | 75% | 11% | 3% | 8% | 21.1–26.9°C |
| May | 93% | 5% | <1% | 2% | 26.0–31.6°C |
| June | 98% | 2% | <1% | 0% | 30.7–35.6°C |
| July | 100% | <1% | 0% | 0% | 34.8–38.6°C |
| August | 100% | <1% | 0% | 0% | 33.9–37.9°C |
| September | 98% | 2% | <1% | <1% | 30.6–34.9°C |
| October | 91% | 5% | 2% | 3% | 24.5–29.1°C |
| November | 41% | 12% | 4% | 10% | 16.7–21.2°C |
| December | 3% | 18% | 5% | 18% | 10.7–15.2°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