September
September · August · June
83climate match
United States · 1991–2020
Best time to visit
Deer Grove.
September leads for comfortable weather in Deer Grove: typically 24.5°C by day, 11.6°C at night, with 83 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.5°C
Typical low11.6°C
Rain in September83 mm
July
July · August · June
75climate match
May
May · September · October
72climate match
The weakest month is January, scoring 5 against September’s 83 — days reach only -1.4°C, 25° 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
5-1.4° / -10.6°
Feb
51.3° / -8.2°
Mar
108° / -2.6°
Apr
4216° / 3.7°
May
6922.1° / 10.3°
Jun
7127.1° / 15.7°
Jul
6928.6° / 17.5°
Aug
7327.6° / 16.2°
Sep
8324.5° / 11.6°
Oct
5117.4° / 5°
Nov
168.8° / -1.2°
Dec
51.7° / -7.2°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -1.4°C | -10.6°C | 39 mm | 5.9 | 9 h 28 | 5 | Strong coverage |
| February | 1.3°C | -8.2°C | 40 mm | 4.8 | 10 h 32 | 5 | Strong coverage |
| March | 8°C | -2.6°C | 53 mm | 6.3 | 11 h 48 | 10 | Strong coverage |
| April | 16°C | 3.7°C | 85 mm | 7.7 | 13 h 16 | 42 | Strong coverage |
| May | 22.1°C | 10.3°C | 116 mm | 9 | 14 h 30 | 69 | Strong coverage |
| June | 27.1°C | 15.7°C | 128 mm | 8 | 15 h 10 | 71 | Strong coverage |
| July | 28.6°C | 17.5°C | 94 mm | 6.6 | 14 h 55 | 69 | Strong coverage |
| August | 27.6°C | 16.2°C | 105 mm | 6.7 | 13 h 51 | 73 | Strong coverage |
| September | 24.5°C | 11.6°C | 83 mm | 5.8 | 12 h 25 | 83 | Strong coverage |
| October | 17.4°C | 5°C | 79 mm | 6.1 | 11 h 01 | 51 | Strong coverage |
| November | 8.8°C | -1.2°C | 55 mm | 5.4 | 9 h 47 | 16 | Strong coverage |
| December | 1.7°C | -7.2°C | 42 mm | 5.4 | 9 h 10 | 5 | Good coverage |
What has changed
Deer Grove runs +0.0°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
+0.5
Feb
-0.1
Mar
+0.3
Apr
-0.9
May
-0.4
Jun
-0.4
Jul
-1.0
Aug
-0.7
Sep
+0.8
Oct
-0.1
Nov
0.0
Dec
+2.2
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.3°C24 Jan 1967 | -32.8°C20 Jan 1985 | 64 mm24 Jan 1938 | 133 mm1916 · driest 2 mm in 1961 | 133 |
| February | 25.0°C28 Feb 2024 | -32.2°C1 Feb 2019 | 62 mm21 Feb 1997 | 101 mm2013 · driest 0 mm in 2010 | 133 |
| March | 30.6°C29 Mar 1986 | -25.0°C3 Mar 2002 | 59 mm25 Mar 1954 | 155 mm1973 · driest 7 mm in 1958 | 131 |
| April | 34.4°C30 Apr 1895 | -14.4°C5 Apr 1982 | 122 mm18 Apr 2013 | 214 mm2013 · driest 13 mm in 1901 | 134 |
| May | 40.6°C31 May 1934 | -4.4°C2 May 2005 | 135 mm10 May 1951 | 283 mm1974 · driest 16 mm in 1992 | 134 |
| June | 41.1°C1 Jun 1934 | 2.8°C8 Jun 1913 | 162 mm24 Jun 1994 | 322 mm1990 · driest 8 mm in 1988 | 133 |
| July | 43.9°C14 Jul 1936 | 6.7°C2 Jul 1904 | 119 mm22 Jul 2017 | 280 mm1902 · driest 7 mm in 1894 | 133 |
| August | 40.6°C18 Aug 1936 | 2.8°C26 Aug 1896 | 116 mm20 Aug 1979 | 344 mm1987 · driest 11 mm in 2013 | 132 |
| September | 39.4°C13 Sep 1897 | -5.6°C30 Sep 1899 | 104 mm1 Sep 1926 | 326 mm1926 · driest 0 mm in 1979 | 132 |
| October | 36.7°C1 Oct 1897 | -12.2°C28 Oct 1925 | 132 mm3 Oct 1941 | 260 mm1941 · driest 0 mm in 1953 | 132 |
| November | 27.2°C1 Nov 1950 | -22.2°C29 Nov 1976 | 70 mm17 Nov 1928 | 194 mm1985 · driest 2 mm in 1904 | 131 |
| December | 21.1°C4 Dec 2012 | -30.6°C28 Dec 1924 | 84 mm9 Dec 2003 | 146 mm1971 · driest 0 mm in 1939 | 132 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | 1 | 4 |
| February | 0 | 0 | 25 | 1 | 3 |
| March | <1 | 0 | 22 | 2 | 2 |
| April | 3 | <1 | 7 | 3 | <1 |
| May | 11 | 3 | <1 | 4 | 0 |
| June | 22 | 9 | 0 | 4 | 0 |
| July | 26 | 11 | 0 | 4 | 0 |
| August | 24 | 8 | 0 | 3 | 0 |
| September | 15 | 4 | <1 | 3 | 0 |
| October | 4 | <1 | 6 | 2 | <1 |
| November | <1 | 0 | 18 | 2 | <1 |
| December | 0 | 0 | 27 | 1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 18% | 4% | 14% | -5.0–2.9°C |
| February | <1% | 18% | 4% | 13% | -2.6–5.2°C |
| March | 5% | 23% | 8% | 24% | 4.6–12.2°C |
| April | 24% | 27% | 10% | 30% | 13.5–19.5°C |
| May | 52% | 30% | 12% | 36% | 19.9–25.8°C |
| June | 71% | 27% | 12% | 29% | 25.6–30.3°C |
| July | 78% | 22% | 10% | 21% | 27.7–32.8°C |
| August | 78% | 22% | 10% | 20% | 27.0–31.6°C |
| September | 66% | 23% | 11% | 23% | 22.8–27.4°C |
| October | 35% | 19% | 7% | 17% | 15.5–21.0°C |
| November | 5% | 19% | 7% | 15% | 6.0–11.8°C |
| December | <1% | 18% | 5% | 13% | -2.2–5.3°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 4889637
- NOAA station
- USC00118916 · WALNUT
- Station distance
- 9.8 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 24 usable years
- Daylight
- Calculated from latitude 41.61°, 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.