April
April · May · October
United States · 1991–2020
April leads for comfortable weather in Bern: typically 23.3°C by day, 5.4°C at night, with 15 mm of rain. Based on measured 1991–2020 NOAA station history.
April · May · October
June · July · September
November · March · April
The weakest month is January, scoring 44 against April’s 81 — days reach only 16.4°C, 8° below the 24°C the score treats as ideal, and nights drop to 2.1°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 | 16.4°C | 2.1°C | 70 mm | 6.1 | 9 h 59 | 44 | Strong coverage |
| February | 17.5°C | 3.3°C | 63 mm | 6.7 | 10 h 50 | 50 | Strong coverage |
| March | 20°C | 4.6°C | 61 mm | 5.5 | 11 h 51 | 62 | Strong coverage |
| April | 23.3°C | 5.4°C | 15 mm | 2.5 | 13 h 03 | 81 | Strong coverage |
| May | 27.5°C | 8.1°C | 8 mm | 1.1 | 14 h 02 | 76 | Strong coverage |
| June | 31.7°C | 10.4°C | 1 mm | 0.2 | 14 h 34 | 66 | Strong coverage |
| July | 34.3°C | 12.5°C | 2 mm | 0.1 | 14 h 21 | 62 | Strong coverage |
| August | 34.7°C | 12.3°C | 0 mm | 0.1 | 13 h 30 | 60 | Strong coverage |
| September | 32.6°C | 10.5°C | 2 mm | 0.3 | 12 h 22 | 64 | Strong coverage |
| October | 27.3°C | 6.9°C | 14 mm | 1.4 | 11 h 13 | 75 | Strong coverage |
| November | 20.6°C | 3.3°C | 22 mm | 2.9 | 10 h 14 | 68 | Strong coverage |
| December | 16°C | 1.2°C | 50 mm | 5.4 | 9 h 45 | 44 | 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 | 28.3°C31 Jan 1976 | -11.1°C13 Jan 2007 | 79 mm19 Jan 1969 | 310 mm1969 · driest 0 mm in 1976 | 78 |
| February | 28.9°C12 Feb 2022 | -7.8°C27 Feb 1971 | 79 mm16 Feb 1980 | 224 mm1969 · driest 0 mm in 1953 | 78 |
| March | 35.0°C18 Mar 2026 | -6.7°C2 Mar 1971 | 139 mm10 Mar 1995 | 293 mm1995 · driest 0 mm in 2026 | 78 |
| April | 37.2°C21 Apr 2009 | -2.8°C11 Apr 1953 | 42 mm6 Apr 1958 | 124 mm1958 · driest 0 mm in 1966 | 78 |
| May | 42.2°C31 May 2001 | -1.1°C18 May 1974 | 28 mm7 May 1955 | 55 mm1998 · driest 0 mm in 2022 | 78 |
| June | 46.1°C14 Jun 2000 | 2.2°C8 Jun 1988 | 7 mm9 Jun 1957 | 8 mm1995 · driest 0 mm in 2003 | 78 |
| July | 46.1°C11 Jul 1961 | 5.0°C5 Jul 1948 | 53 mm19 Jul 2015 | 55 mm2015 · driest 0 mm in 1996 | 79 |
| August | 45.6°C16 Aug 2020 | 4.4°C26 Aug 1968 | 23 mm19 Aug 1976 | 23 mm1976 · driest 0 mm in 2003 | 78 |
| September | 47.2°C6 Sep 2020 | 1.1°C25 Sep 1948 | 41 mm28 Sep 1976 | 82 mm1976 · driest 0 mm in 1957 | 78 |
| October | 42.2°C2 Oct 2024 | -6.7°C29 Oct 1971 | 47 mm19 Oct 2004 | 99 mm2004 · driest 0 mm in 1955 | 78 |
| November | 36.7°C1 Nov 1966 | -7.8°C17 Nov 1958 | 54 mm14 Nov 1953 | 133 mm1965 · driest 0 mm in 1959 | 78 |
| December | 28.3°C4 Dec 1958 | -13.3°C22 Dec 1990 | 78 mm6 Dec 1966 | 173 mm1966 · driest 0 mm in 1989 | 78 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | <1 | 0 | 11 | 2 |
| February | 2 | 0 | 7 | 2 |
| March | 5 | <1 | 3 | 2 |
| April | 12 | 4 | 2 | <1 |
| May | 21 | 11 | <1 | <1 |
| June | 26 | 19 | 0 | 0 |
| July | 30 | 25 | 0 | 0 |
| August | 30 | 26 | 0 | 0 |
| September | 28 | 22 | 0 | 0 |
| October | 21 | 11 | <1 | <1 |
| November | 6 | 1 | 7 | <1 |
| December | <1 | 0 | 15 | 2 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 78); on 2011–2025 it is April (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 | 15% | 20% | 8% | 23% | 13.3–17.9°C |
| February | 27% | 21% | 7% | 27% | 14.9–20.2°C |
| March | 44% | 17% | 6% | 18% | 16.1–22.9°C |
| April | 68% | 10% | 2% | 7% | 20.1–25.8°C |
| May | 89% | 3% | <1% | 1% | 24.2–29.5°C |
| June | 98% | <1% | 0% | 0% | 28.5–34.0°C |
| July | 100% | <1% | <1% | 0% | 32.1–37.2°C |
| August | 100% | <1% | <1% | 0% | 32.2–36.6°C |
| September | 98% | 2% | <1% | <1% | 29.2–33.7°C |
| October | 89% | 4% | 1% | 2% | 24.2–29.8°C |
| November | 50% | 12% | 3% | 11% | 17.3–22.6°C |
| December | 15% | 17% | 6% | 17% | 13.3–18.2°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