September
September · August · June
81climate match
United States · 1991–2020
Best time to visit
Coon Rapids.
September leads for comfortable weather in Coon Rapids: typically 24.6°C by day, 10.7°C at night, with 75 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.6°C
Typical low10.7°C
Rain in September75 mm
July
July · August · June
72climate match
September
September · October · May
73climate match
The weakest month is January, scoring 5 against September’s 81 — days reach only -2.2°C, 26° 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
5-2.2° / -12.2°
Feb
50.5° / -10°
Mar
87.9° / -3.8°
Apr
3715.5° / 2.2°
May
6421.8° / 9.2°
Jun
6927.4° / 15.3°
Jul
6429.1° / 17.3°
Aug
7127.9° / 15.8°
Sep
8124.6° / 10.7°
Oct
5017.2° / 4°
Nov
148° / -3.2°
Dec
50.6° / -9°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -2.2°C | -12.2°C | 20 mm | 3.9 | 9 h 27 | 5 | Strong coverage |
| February | 0.5°C | -10°C | 28 mm | 4.7 | 10 h 31 | 5 | Strong coverage |
| March | 7.9°C | -3.8°C | 49 mm | 6.1 | 11 h 48 | 8 | Strong coverage |
| April | 15.5°C | 2.2°C | 87 mm | 8.7 | 13 h 17 | 37 | Strong coverage |
| May | 21.8°C | 9.2°C | 115 mm | 10.6 | 14 h 31 | 64 | Strong coverage |
| June | 27.4°C | 15.3°C | 129 mm | 9.9 | 15 h 12 | 69 | Strong coverage |
| July | 29.1°C | 17.3°C | 108 mm | 7.7 | 14 h 56 | 64 | Strong coverage |
| August | 27.9°C | 15.8°C | 107 mm | 7.7 | 13 h 52 | 71 | Strong coverage |
| September | 24.6°C | 10.7°C | 75 mm | 7.1 | 12 h 26 | 81 | Strong coverage |
| October | 17.2°C | 4°C | 65 mm | 6.6 | 11 h 00 | 50 | Strong coverage |
| November | 8°C | -3.2°C | 35 mm | 4.2 | 9 h 45 | 14 | Strong coverage |
| December | 0.6°C | -9°C | 36 mm | 5 | 9 h 09 | 5 | Strong coverage |
What has changed
Coon Rapids runs +0.4°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
+0.8
Feb
-0.3
Mar
+1.6
Apr
-0.9
May
-1.0
Jun
+0.3
Jul
-0.7
Aug
-0.6
Sep
+1.8
Oct
+0.5
Nov
+1.2
Dec
+2.5
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.0°C25 Jan 1944 | -40.0°C12 Jan 1912 | 52 mm22 Jan 1933 | 62 mm1982 · driest 0 mm in 1903 | 133 |
| February | 24.4°C27 Feb 2024 | -36.1°C2 Feb 1905 | 46 mm15 Feb 2003 | 76 mm1893 · driest 1 mm in 1970 | 134 |
| March | 32.8°C22 Mar 2026 | -33.3°C1 Mar 1962 | 55 mm7 Mar 2026 | 140 mm1991 · driest 1 mm in 1910 | 134 |
| April | 34.4°C28 Apr 1910 | -16.1°C3 Apr 2002 | 71 mm25 Apr 1973 | 294 mm1984 · driest 5 mm in 1910 | 133 |
| May | 41.7°C30 May 1934 | -7.8°C4 May 1907 | 107 mm23 May 1976 | 251 mm1896 · driest 16 mm in 1934 | 133 |
| June | 40.6°C30 Jun 1933 | 0.6°C3 Jun 1969 | 120 mm23 Jun 1947 | 405 mm1967 · driest 2 mm in 1933 | 133 |
| July | 44.4°C4 Jul 1936 | 3.9°C5 Jul 1972 | 175 mm10 Jul 1993 | 380 mm1993 · driest 5 mm in 2013 | 132 |
| August | 44.4°C5 Aug 1934 | 1.1°C28 Aug 1935 | 122 mm17 Aug 1928 | 302 mm2002 · driest 8 mm in 1909 | 132 |
| September | 39.4°C7 Sep 1939 | -7.2°C29 Sep 1899 | 125 mm19 Sep 1926 | 366 mm1926 · driest 5 mm in 2024 | 133 |
| October | 34.4°C6 Oct 2024 | -17.2°C28 Oct 1925 | 73 mm11 Oct 1986 | 147 mm2009 · driest 0 mm in 1952 | 133 |
| November | 26.1°C3 Nov 2005 | -24.4°C23 Nov 1898 | 71 mm12 Nov 1909 | 184 mm1909 · driest 0 mm in 1976 | 132 |
| December | 21.7°C16 Dec 2021 | -32.2°C30 Dec 1917 | 89 mm6 Dec 1992 | 155 mm2015 · driest 0 mm in 1908 | 133 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 4 |
| February | 0 | 0 | 26 | <1 | 4 |
| March | <1 | 0 | 23 | 1 | 2 |
| April | 3 | <1 | 10 | 3 | <1 |
| May | 10 | 3 | <1 | 4 | 0 |
| June | 23 | 10 | 0 | 4 | 0 |
| July | 28 | 13 | 0 | 3 | 0 |
| August | 25 | 9 | 0 | 3 | 0 |
| September | 16 | 5 | <1 | 2 | 0 |
| October | 5 | <1 | 8 | 2 | <1 |
| November | <1 | 0 | 22 | 1 | 1 |
| December | 0 | 0 | 29 | 1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 12% | 2% | 7% | -6.3–2.6°C |
| February | <1% | 15% | 3% | 8% | -3.9–4.9°C |
| March | 7% | 19% | 5% | 18% | 3.0–12.0°C |
| April | 26% | 26% | 9% | 30% | 12.6–18.8°C |
| May | 50% | 31% | 12% | 38% | 19.9–25.4°C |
| June | 67% | 31% | 14% | 36% | 25.0–30.2°C |
| July | 76% | 24% | 10% | 24% | 27.8–32.7°C |
| August | 75% | 25% | 10% | 25% | 26.6–31.0°C |
| September | 66% | 22% | 9% | 22% | 22.2–27.4°C |
| October | 37% | 17% | 6% | 15% | 14.8–21.1°C |
| November | 5% | 14% | 4% | 10% | 4.8–11.5°C |
| December | <1% | 13% | 3% | 7% | -3.5–4.6°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 4852589
- NOAA station
- USC00131233 · CARROLL
- Station distance
- 25.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 41.87°, 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.