September
September · May · August
United States · 1991–2020
September leads for comfortable weather in Norway: typically 25.8°C by day, 11.6°C at night, with 71 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · August
August · July · June
October · September · April
The weakest month is January, scoring 5 against September’s 81 — days reach only 1.3°C, 23° 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 | 1.3°C | -7°C | 61 mm | 7.2 | 9 h 33 | 5 | Good coverage |
| February | 4.2°C | -5.1°C | 48 mm | 5.5 | 10 h 35 | 5 | Good coverage |
| March | 10.6°C | -0.5°C | 74 mm | 6.8 | 11 h 49 | 19 | Good coverage |
| April | 18.1°C | 5.1°C | 94 mm | 8.7 | 13 h 14 | 49 | Good coverage |
| May | 23.4°C | 10.5°C | 108 mm | 9.6 | 14 h 26 | 74 | Good coverage |
| June | 28°C | 15.7°C | 117 mm | 8.2 | 15 h 05 | 69 | Good coverage |
| July | 29.3°C | 17.1°C | 131 mm | 8.2 | 14 h 49 | 61 | Good coverage |
| August | 28.7°C | 16.3°C | 86 mm | 6.6 | 13 h 48 | 72 | Good coverage |
| September | 25.8°C | 11.6°C | 71 mm | 5.4 | 12 h 25 | 81 | Good coverage |
| October | 19°C | 6°C | 72 mm | 6.4 | 11 h 03 | 59 | Good coverage |
| November | 11.3°C | 1.3°C | 75 mm | 7.3 | 9 h 51 | 24 | Good coverage |
| December | 3.5°C | -4.6°C | 61 mm | 6.8 | 9 h 16 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.7°C26 Jan 1950 | -31.7°C28 Jan 1963 | 71 mm21 Jan 1959 | 201 mm1950 · driest 2 mm in 1986 | 116 |
| February | 22.8°C11 Feb 1999 | -31.1°C26 Feb 1963 | 62 mm22 Feb 1990 | 161 mm1990 · driest 3 mm in 1947 | 117 |
| March | 31.1°C24 Mar 1910 | -21.7°C8 Mar 1943 | 80 mm24 Mar 1913 | 202 mm1913 · driest 9 mm in 1910 | 117 |
| April | 33.9°C29 Apr 1899 | -12.2°C7 Apr 1982 | 102 mm27 Apr 1959 | 229 mm1994 · driest 20 mm in 1899 | 119 |
| May | 37.8°C31 May 1937 | -3.9°C10 May 1966 | 177 mm16 May 1968 | 282 mm1943 · driest 5 mm in 1925 | 119 |
| June | 42.2°C28 Jun 1934 | 1.1°C1 Jun 1931 | 115 mm13 Jun 1942 | 334 mm1902 · driest 5 mm in 1988 | 118 |
| July | 44.4°C24 Jul 1934 | 4.4°C27 Jul 1920 | 95 mm20 Jul 1963 | 345 mm2003 · driest 0 mm in 1936 | 117 |
| August | 41.7°C5 Aug 1918 | 2.2°C29 Aug 1965 | 96 mm10 Aug 1977 | 289 mm1977 · driest 14 mm in 1996 | 117 |
| September | 40.0°C14 Sep 1939 | -3.9°C30 Sep 1899 | 121 mm1 Sep 1989 | 267 mm1926 · driest 1 mm in 1979 | 118 |
| October | 33.9°C2 Oct 1922 | -9.4°C30 Oct 1925 | 100 mm12 Oct 1901 | 203 mm1949 · driest 4 mm in 2005 | 116 |
| November | 28.3°C1 Nov 1950 | -22.2°C28 Nov 1930 | 90 mm2 Nov 1936 | 192 mm1985 · driest 3 mm in 1904 | 115 |
| December | 21.7°C6 Dec 1998 | -29.4°C22 Dec 1989 | 71 mm18 Dec 1924 | 191 mm1924 · driest 2 mm in 1962 | 115 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 2 | 4 |
| February | 0 | 0 | 22 | 2 | 2 |
| March | <1 | 0 | 17 | 2 | 1 |
| April | 4 | <1 | 6 | 4 | <1 |
| May | 12 | 4 | <1 | 4 | 0 |
| June | 24 | 10 | 0 | 4 | 0 |
| July | 28 | 13 | 0 | 4 | 0 |
| August | 27 | 11 | 0 | 3 | 0 |
| September | 18 | 6 | <1 | 2 | 0 |
| October | 6 | <1 | 4 | 3 | 0 |
| November | <1 | 0 | 13 | 2 | <1 |
| December | 0 | 0 | 23 | 2 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 24% | 6% | 25% | -2.2–5.6°C |
| February | <1% | 22% | 6% | 19% | -0.3–7.3°C |
| March | 8% | 27% | 9% | 31% | 6.5–13.9°C |
| April | 27% | 31% | 11% | 38% | 15.0–20.2°C |
| May | 54% | 30% | 12% | 37% | 20.7–26.5°C |
| June | 72% | 27% | 11% | 30% | 26.2–30.9°C |
| July | 76% | 24% | 11% | 24% | 28.3–33.0°C |
| August | 78% | 22% | 9% | 19% | 27.4–31.6°C |
| September | 72% | 21% | 9% | 20% | 23.8–28.7°C |
| October | 40% | 21% | 8% | 22% | 16.8–22.4°C |
| November | 8% | 25% | 8% | 24% | 8.1–13.8°C |
| December | <1% | 24% | 7% | 24% | 0.3–7.2°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