September
September · June · August
84climate match
United States · 1991–2020
Best time to visit
Vroman.
September leads for comfortable weather in Vroman: typically 25.6°C by day, 10.5°C at night, with 44 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high25.6°C
Typical low10.5°C
Rain in September44 mm
August
August · July · June
72climate match
September
September · October · May
78climate match
The weakest month is January, scoring 5 against September’s 84 — days reach only 3.7°C, 20° below the 24°C the score treats as ideal, and nights drop to -9.5°C.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
53.7° / -9.5°
Feb
55.6° / -8.1°
Mar
2812.3° / -3°
Apr
4717.2° / 2°
May
6822.4° / 8.5°
Jun
7228.3° / 14.3°
Jul
6331° / 17°
Aug
7029.6° / 16°
Sep
8425.6° / 10.5°
Oct
5618.1° / 3.2°
Nov
2210.7° / -3.7°
Dec
54.6° / -8.6°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 3.7°C | -9.5°C | 9 mm | 2.1 | 9 h 32 | 5 | Strong coverage |
| February | 5.6°C | -8.1°C | 16 mm | 3 | 10 h 34 | 5 | Strong coverage |
| March | 12.3°C | -3°C | 28 mm | 4.3 | 11 h 49 | 28 | Strong coverage |
| April | 17.2°C | 2°C | 69 mm | 6.2 | 13 h 15 | 47 | Strong coverage |
| May | 22.4°C | 8.5°C | 104 mm | 8.7 | 14 h 27 | 68 | Strong coverage |
| June | 28.3°C | 14.3°C | 93 mm | 8.2 | 15 h 06 | 72 | Strong coverage |
| July | 31°C | 17°C | 84 mm | 7.3 | 14 h 51 | 63 | Strong coverage |
| August | 29.6°C | 16°C | 84 mm | 6.6 | 13 h 48 | 70 | Strong coverage |
| September | 25.6°C | 10.5°C | 44 mm | 4.6 | 12 h 25 | 84 | Strong coverage |
| October | 18.1°C | 3.2°C | 47 mm | 4.9 | 11 h 02 | 56 | Strong coverage |
| November | 10.7°C | -3.7°C | 18 mm | 2.8 | 9 h 50 | 22 | Strong coverage |
| December | 4.6°C | -8.6°C | 14 mm | 2.2 | 9 h 15 | 5 | Strong coverage |
What has changed
Vroman runs +0.5°C
on the 1961–1990 baseline.
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.
Jan
+1.1
Feb
-0.9
Mar
+2.1
Apr
-0.4
May
-0.8
Jun
+0.3
Jul
-1.0
Aug
-1.1
Sep
+1.9
Oct
-0.2
Nov
+2.3
Dec
+2.1
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.0°C15 Jan 1943 | -33.9°C17 Jan 1930 | 30 mm27 Jan 1944 | 52 mm2023 · driest 0 mm in 1943 | 130 |
| February | 26.1°C19 Feb 1930 | -36.1°C11 Feb 1899 | 27 mm27 Feb 1987 | 56 mm1903 · driest 0 mm in 1910 | 131 |
| March | 34.4°C21 Mar 2026 | -29.4°C6 Mar 1943 | 49 mm30 Mar 1949 | 105 mm2021 · driest 0 mm in 1994 | 131 |
| April | 38.3°C28 Apr 1910 | -19.4°C2 Apr 1936 | 93 mm17 Apr 1896 | 187 mm2016 · driest 0 mm in 1928 | 131 |
| May | 39.4°C29 May 1934 | -7.8°C1 May 1909 | 135 mm23 May 2008 | 302 mm2008 · driest 5 mm in 1934 | 130 |
| June | 43.3°C15 Jun 1946 | 0.6°C7 Jun 1935 | 159 mm29 Jun 1988 | 316 mm2010 · driest 12 mm in 2021 | 130 |
| July | 46.7°C11 Jul 1954 | 4.4°C16 Jul 1900 | 76 mm17 Jul 1993 | 191 mm1994 · driest 5 mm in 1935 | 130 |
| August | 42.8°C10 Aug 1907 | 2.2°C24 Aug 1928 | 104 mm6 Aug 1900 | 188 mm1915 · driest 8 mm in 2000 | 130 |
| September | 41.7°C5 Sep 1931 | -6.7°C30 Sep 1984 | 75 mm2 Sep 1942 | 168 mm1917 · driest 0 mm in 1953 | 131 |
| October | 40.0°C5 Oct 1947 | -16.7°C28 Oct 1925 | 74 mm19 Oct 1908 | 155 mm1946 · driest 0 mm in 1933 | 131 |
| November | 29.4°C5 Nov 1915 | -25.6°C28 Nov 1976 | 40 mm9 Nov 2024 | 72 mm1919 · driest 0 mm in 1989 | 131 |
| December | 24.4°C6 Dec 1939 | -34.4°C22 Dec 1989 | 36 mm5 Dec 1913 | 99 mm1913 · driest 0 mm in 2004 | 131 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 |
| February | 0 | 0 | 26 | <1 |
| March | 2 | <1 | 23 | <1 |
| April | 4 | <1 | 11 | 2 |
| May | 12 | 3 | 1 | 4 |
| June | 24 | 12 | 0 | 3 |
| July | 29 | 19 | 0 | 3 |
| August | 27 | 15 | 0 | 3 |
| September | 18 | 7 | <1 | 1 |
| October | 6 | <1 | 8 | 2 |
| November | <1 | 0 | 23 | <1 |
| December | 0 | 0 | 30 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 8% | <1% | 3% | -1.4–7.7°C |
| February | 3% | 11% | 1% | 6% | 0.5–10.5°C |
| March | 17% | 14% | 2% | 9% | 7.1–15.8°C |
| April | 39% | 19% | 7% | 19% | 14.9–21.1°C |
| May | 58% | 27% | 10% | 32% | 20.7–26.1°C |
| June | 71% | 27% | 11% | 30% | 25.9–31.6°C |
| July | 77% | 22% | 8% | 20% | 29.2–34.5°C |
| August | 80% | 20% | 8% | 17% | 28.3–33.1°C |
| September | 76% | 16% | 5% | 13% | 23.4–29.1°C |
| October | 50% | 12% | 4% | 7% | 16.8–22.8°C |
| November | 12% | 9% | 2% | 4% | 7.8–14.2°C |
| December | 1% | 8% | 1% | 3% | 0.9–8.5°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
Nearby, measured,
and named.
- Place identity
- GeoNames 5700425
- NOAA station
- USC00253365 · GOTHENBURG
- Station distance
- 9.4 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 40.97°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.