September
September · June · August
81climate match
United States · 1991–2020
Best time to visit
Cedar Rapids.
September leads for comfortable weather in Cedar Rapids: typically 24.8°C by day, 10.4°C at night, with 74 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.8°C
Typical low10.4°C
Rain in September74 mm
July
July · August · June
74climate match
September
September · October · May
75climate match
The weakest month is January, scoring 5 against September’s 81 — days reach only 0.8°C, 23° below the 24°C the score treats as ideal, and nights drop to -11.2°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
50.8° / -11.2°
Feb
53.2° / -9.5°
Mar
159.6° / -4.4°
Apr
4116° / 1.4°
May
6621.8° / 8.4°
Jun
7527.5° / 14.4°
Jul
6829.4° / 16.8°
Aug
7328.2° / 15.6°
Sep
8124.8° / 10.4°
Oct
5317.7° / 2.9°
Nov
158.9° / -4.3°
Dec
53° / -8.9°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 0.8°C | -11.2°C | 14 mm | 2.8 | 9 h 28 | 5 | Good coverage |
| February | 3.2°C | -9.5°C | 17 mm | 3.2 | 10 h 32 | 5 | Strong coverage |
| March | 9.6°C | -4.4°C | 44 mm | 5 | 11 h 48 | 15 | Strong coverage |
| April | 16°C | 1.4°C | 67 mm | 6.9 | 13 h 16 | 41 | Strong coverage |
| May | 21.8°C | 8.4°C | 104 mm | 8.9 | 14 h 30 | 66 | Strong coverage |
| June | 27.5°C | 14.4°C | 90 mm | 8.1 | 15 h 10 | 75 | Strong coverage |
| July | 29.4°C | 16.8°C | 84 mm | 7.4 | 14 h 54 | 68 | Strong coverage |
| August | 28.2°C | 15.6°C | 93 mm | 7 | 13 h 51 | 73 | Strong coverage |
| September | 24.8°C | 10.4°C | 74 mm | 5.6 | 12 h 25 | 81 | Good coverage |
| October | 17.7°C | 2.9°C | 54 mm | 5.3 | 11 h 01 | 53 | Good coverage |
| November | 8.9°C | -4.3°C | 33 mm | 3.7 | 9 h 47 | 15 | Good coverage |
| December | 3°C | -8.9°C | 18 mm | 2.8 | 9 h 11 | 5 | Good coverage |
What has changed
Cedar Rapids runs +0.1°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
+0.6
Feb
-0.5
Mar
+2.2
Apr
-0.4
May
-0.5
Jun
+0.4
Jul
-2.1
Aug
-1.8
Sep
+1.0
Oct
-0.5
Nov
+1.4
Dec
+1.9
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 22.2°C25 Jan 1981 | -38.3°C12 Jan 1912 | 24 mm27 Jan 1944 | 67 mm1932 · driest 0 mm in 1981 | 124 |
| February | 25.6°C29 Feb 1972 | -37.2°C16 Feb 2021 | 67 mm19 Feb 1971 | 86 mm1971 · driest 0 mm in 1922 | 120 |
| March | 35.0°C22 Mar 2026 | -31.1°C1 Mar 1962 | 61 mm14 Mar 2019 | 191 mm1973 · driest 0 mm in 1994 | 125 |
| April | 37.8°C28 Apr 1910 | -18.9°C3 Apr 1936 | 77 mm12 Apr 1896 | 257 mm1984 · driest 0 mm in 1924 | 123 |
| May | 40.6°C29 May 1934 | -6.1°C17 May 1973 | 103 mm30 May 2007 | 235 mm1982 · driest 10 mm in 1994 | 121 |
| June | 42.2°C25 Jun 1936 | 0.6°C15 Jun 1917 | 157 mm18 Jun 1929 | 259 mm2025 · driest 11 mm in 2017 | 123 |
| July | 46.1°C24 Jul 1936 | -0.6°C9 Jul 1895 | 83 mm4 Jul 2022 | 262 mm2025 · driest 0 mm in 1895 | 123 |
| August | 44.4°C5 Aug 1934 | 0.0°C30 Aug 1915 | 261 mm13 Aug 1966 | 320 mm1966 · driest 3 mm in 1941 | 123 |
| September | 41.1°C6 Sep 1931 | -6.7°C29 Sep 1899 | 112 mm11 Sep 2003 | 218 mm1965 · driest 5 mm in 1940 | 120 |
| October | 36.1°C5 Oct 1947 | -17.2°C28 Oct 1925 | 69 mm16 Oct 1968 | 127 mm2007 · driest 0 mm in 1933 | 120 |
| November | 28.9°C6 Nov 1914 | -27.8°C30 Nov 1964 | 76 mm16 Nov 1996 | 109 mm1996 · driest 0 mm in 1900 | 121 |
| December | 25.6°C6 Dec 1939 | -33.9°C10 Dec 1919 | 45 mm5 Dec 1913 | 96 mm1913 · driest 0 mm in 1931 | 121 |
| 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 | 3 |
| March | <1 | 0 | 25 | 2 | 3 |
| April | 3 | <1 | 12 | 2 | 1 |
| May | 11 | 3 | 1 | 4 | 0 |
| June | 23 | 10 | 0 | 3 | 0 |
| July | 27 | 14 | 0 | 3 | 0 |
| August | 25 | 11 | 0 | 3 | 0 |
| September | 17 | 6 | <1 | 2 | 0 |
| October | 5 | 1 | 10 | 2 | <1 |
| November | <1 | 0 | 24 | 1 | 2 |
| December | 0 | 0 | 30 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 8% | 1% | 3% | -4.4–5.3°C |
| February | 2% | 11% | 2% | 6% | -2.0–7.8°C |
| March | 11% | 14% | 4% | 11% | 4.1–13.4°C |
| April | 31% | 21% | 7% | 21% | 13.6–19.8°C |
| May | 54% | 27% | 11% | 32% | 19.8–25.5°C |
| June | 70% | 27% | 12% | 30% | 24.9–30.4°C |
| July | 78% | 22% | 9% | 20% | 28.0–34.4°C |
| August | 78% | 21% | 9% | 18% | 27.1–33.0°C |
| September | 71% | 18% | 7% | 16% | 23.0–28.2°C |
| October | 45% | 13% | 5% | 10% | 15.4–22.2°C |
| November | 9% | 9% | 3% | 5% | 6.3–13.1°C |
| December | <1% | 9% | 2% | 4% | -1.5–6.4°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 5065353
- NOAA station
- USC00250070 · ALBION
- Station distance
- 18 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 24 usable years
- Daylight
- Calculated from latitude 41.56°, 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.