September
September · June · August
82climate match
United States · 1991–2020
Best time to visit
Stony Prairie.
September leads for comfortable weather in Stony Prairie: typically 24.9°C by day, 12°C at night, with 81 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.9°C
Typical low12°C
Rain in September81 mm
July
July · August · June
72climate match
May
May · October · September
73climate match
The weakest month is January, scoring 5 against September’s 82 — days reach only 0.8°C, 23° below the 24°C the score treats as ideal.
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
50.8° / -7.6°
Feb
52.6° / -6.6°
Mar
68.1° / -2.2°
Apr
3515.3° / 3.4°
May
6922.1° / 10°
Jun
7427.1° / 15.3°
Jul
6429.6° / 17.4°
Aug
7328.2° / 16.1°
Sep
8224.9° / 12°
Oct
5317.8° / 5.8°
Nov
1710° / 0.5°
Dec
54.2° / -3.7°
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 0.8°C | -7.6°C | 70 mm | 9.8 | 1.1°C | 9 h 30 | 5 | Strong coverage |
| February | 2.6°C | -6.6°C | 62 mm | 8.1 | 0.7°C | 10 h 33 | 5 | Good coverage |
| March | 8.1°C | -2.2°C | 71 mm | 8.9 | 1.9°C | 11 h 48 | 6 | Good coverage |
| April | 15.3°C | 3.4°C | 98 mm | 10.6 | 6.3°C | 13 h 16 | 35 | Good coverage |
| May | 22.1°C | 10°C | 96 mm | 11.1 | 13.0°C | 14 h 29 | 69 | Good coverage |
| June | 27.1°C | 15.3°C | 104 mm | 9.2 | 19.7°C | 15 h 09 | 74 | Good coverage |
| July | 29.6°C | 17.4°C | 93 mm | 8.5 | 23.9°C | 14 h 53 | 64 | Good coverage |
| August | 28.2°C | 16.1°C | 85 mm | 7.6 | 24.1°C | 13 h 50 | 73 | Good coverage |
| September | 24.9°C | 12°C | 81 mm | 7.1 | 21.3°C | 12 h 25 | 82 | Good coverage |
| October | 17.8°C | 5.8°C | 74 mm | 8.3 | 14.8°C | 11 h 01 | 53 | Good coverage |
| November | 10°C | 0.5°C | 72 mm | 8.6 | 8.0°C | 9 h 48 | 17 | Good coverage |
| December | 4.2°C | -3.7°C | 66 mm | 8.9 | 3.3°C | 9 h 12 | 5 | Good coverage |
What has changed
Stony Prairie runs +1.6°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
+1.5
Feb
+1.7
Mar
+2.1
Apr
+1.4
May
+1.6
Jun
+1.5
Jul
+1.4
Aug
+1.2
Sep
+1.8
Oct
+1.5
Nov
+0.6
Dec
+2.6
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 22.8°C21 Jan 1906 | -28.9°C19 Jan 1994 | 48 mm15 Jan 2007 | 184 mm1937 · driest 2 mm in 1961 | 109 |
| February | 23.9°C27 Feb 2000 | -27.2°C5 Feb 1918 | 65 mm16 Feb 1909 | 172 mm2008 · driest 2 mm in 1987 | 109 |
| March | 30.0°C22 Mar 2012 | -20.6°C2 Mar 1978 | 71 mm25 Mar 1913 | 220 mm1913 · driest 5 mm in 1910 | 109 |
| April | 33.9°C25 Apr 1925 | -14.4°C1 Apr 1923 | 92 mm20 Apr 1920 | 213 mm2026 · driest 18 mm in 1915 | 107 |
| May | 35.6°C31 May 1929 | -2.8°C10 May 1966 | 99 mm30 May 1921 | 198 mm1921 · driest 13 mm in 1939 | 108 |
| June | 41.7°C6 Jun 1925 | 3.3°C11 Jun 1972 | 107 mm17 Jun 1920 | 268 mm1902 · driest 14 mm in 1988 | 108 |
| July | 43.3°C24 Jul 1934 | 6.7°C3 Jul 1907 | 202 mm5 Jul 1969 | 297 mm1969 · driest 16 mm in 1974 | 109 |
| August | 40.6°C7 Aug 1918 | 1.1°C25 Aug 1934 | 82 mm24 Aug 2023 | 242 mm1906 · driest 12 mm in 1993 | 109 |
| September | 40.6°C2 Sep 1953 | -1.1°C30 Sep 1934 | 104 mm24 Sep 1926 | 225 mm1926 · driest 14 mm in 1908 | 107 |
| October | 33.9°C3 Oct 1953 | -7.2°C31 Oct 1988 | 78 mm6 Oct 1910 | 168 mm2001 · driest 0 mm in 1963 | 107 |
| November | 26.7°C2 Nov 2016 | -17.8°C30 Nov 1958 | 69 mm6 Nov 2017 | 159 mm2017 · driest 5 mm in 1904 | 107 |
| December | 22.2°C3 Dec 1982 | -27.2°C22 Dec 1989 | 71 mm22 Dec 2013 | 187 mm1990 · driest 9 mm in 1958 | 107 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 2 | 6 |
| February | 0 | 0 | 25 | 2 | 5 |
| March | <1 | 0 | 22 | 3 | 2 |
| April | 3 | <1 | 8 | 3 | <1 |
| May | 11 | 4 | <1 | 3 | 0 |
| June | 21 | 9 | 0 | 4 | 0 |
| July | 28 | 15 | 0 | 3 | 0 |
| August | 26 | 10 | 0 | 3 | 0 |
| September | 15 | 5 | 0 | 3 | 0 |
| October | 5 | <1 | 4 | 2 | 0 |
| November | <1 | 0 | 15 | 2 | <1 |
| December | 0 | 0 | 24 | 2 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 30% | 7% | 30% | -3.2–4.3°C |
| February | <1% | 27% | 6% | 29% | -1.3–6.1°C |
| March | 5% | 30% | 8% | 36% | 4.6–12.2°C |
| April | 17% | 35% | 11% | 44% | 12.9–18.5°C |
| May | 41% | 35% | 10% | 43% | 18.8–24.7°C |
| June | 64% | 33% | 12% | 34% | 24.9–29.2°C |
| July | 72% | 28% | 10% | 26% | 27.8–31.5°C |
| August | 72% | 27% | 11% | 25% | 26.4–30.2°C |
| September | 62% | 26% | 9% | 24% | 22.9–27.1°C |
| October | 29% | 27% | 8% | 28% | 15.4–20.7°C |
| November | 5% | 30% | 7% | 34% | 7.3–13.0°C |
| December | <1% | 30% | 7% | 32% | -0.1–6.8°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 5173158
- NOAA station
- USC00332974 · FREMONT
- Station distance
- 2.2 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 22 usable years
- Daylight
- Calculated from latitude 41.34°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 31 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.