September
September · August · June
77climate match
United States · 1991–2020
Best time to visit
Claremont.
September leads for comfortable weather in Claremont: typically 22.9°C by day, 10.9°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high22.9°C
Typical low10.9°C
Rain in September97 mm
July
July · August · June
64climate match
May
May · September · October
74climate match
The weakest month is January, scoring 5 against September’s 77 — days reach only -5.2°C, 29° 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
5-5.2° / -14.6°
Feb
5-2.7° / -12.3°
Mar
54.4° / -5.5°
Apr
2813.2° / 1.3°
May
5720.1° / 8.2°
Jun
7225.9° / 14.5°
Jul
6827.7° / 16.7°
Aug
7326.5° / 15.4°
Sep
7722.9° / 10.9°
Oct
4215° / 3.4°
Nov
55.5° / -3.6°
Dec
5-2.1° / -10.4°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -5.2°C | -14.6°C | 27 mm | 4.8 | 9 h 13 | 5 | Strong coverage |
| February | -2.7°C | -12.3°C | 22 mm | 3.8 | 10 h 23 | 5 | Strong coverage |
| March | 4.4°C | -5.5°C | 49 mm | 6.1 | 11 h 47 | 5 | Strong coverage |
| April | 13.2°C | 1.3°C | 81 mm | 8.9 | 13 h 23 | 28 | Strong coverage |
| May | 20.1°C | 8.2°C | 117 mm | 10.4 | 14 h 43 | 57 | Strong coverage |
| June | 25.9°C | 14.5°C | 134 mm | 10.5 | 15 h 28 | 72 | Strong coverage |
| July | 27.7°C | 16.7°C | 119 mm | 8.4 | 15 h 10 | 68 | Strong coverage |
| August | 26.5°C | 15.4°C | 127 mm | 8.6 | 14 h 00 | 73 | Strong coverage |
| September | 22.9°C | 10.9°C | 97 mm | 7.2 | 12 h 27 | 77 | Strong coverage |
| October | 15°C | 3.4°C | 63 mm | 7.1 | 10 h 55 | 42 | Strong coverage |
| November | 5.5°C | -3.6°C | 43 mm | 5 | 9 h 34 | 5 | Strong coverage |
| December | -2.1°C | -10.4°C | 29 mm | 5.5 | 8 h 54 | 5 | Strong coverage |
What has changed
Claremont runs -0.7°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
+0.4
Feb
-1.3
Mar
-0.3
Apr
-2.8
May
-1.7
Jun
-0.8
Jul
-1.4
Aug
-1.4
Sep
+0.5
Oct
-1.3
Nov
+0.2
Dec
+1.6
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 14.4°C24 Jan 1981 | -37.2°C9 Jan 1977 | 45 mm13 Jan 1999 | 137 mm1999 · driest 1 mm in 1981 | 64 |
| February | 20.6°C27 Feb 2024 | -36.7°C2 Feb 1996 | 45 mm29 Feb 2012 | 73 mm2023 · driest 0 mm in 1987 | 64 |
| March | 27.2°C30 Mar 1968 | -35.6°C1 Mar 1962 | 47 mm14 Mar 1990 | 106 mm1990 · driest 3 mm in 1994 | 65 |
| April | 33.3°C21 Apr 1980 | -17.8°C6 Apr 1982 | 55 mm14 Apr 1983 | 163 mm1999 · driest 12 mm in 1987 | 66 |
| May | 36.7°C29 May 2018 | -11.1°C3 May 2005 | 60 mm1 May 1973 | 205 mm2012 · driest 27 mm in 1994 | 66 |
| June | 38.9°C9 Jun 1985 | 0.6°C1 Jun 1964 | 112 mm10 Jun 2006 | 339 mm2024 · driest 20 mm in 1961 | 66 |
| July | 38.9°C4 Jul 1990 | 5.6°C5 Jul 1967 | 123 mm1 Jul 1983 | 245 mm2004 · driest 11 mm in 1975 | 65 |
| August | 38.9°C1 Aug 1988 | 2.2°C18 Aug 1985 | 164 mm19 Aug 2007 | 296 mm2007 · driest 13 mm in 1970 | 63 |
| September | 36.7°C7 Sep 1978 | -5.0°C24 Sep 2012 | 161 mm23 Sep 2010 | 319 mm2010 · driest 15 mm in 1990 | 65 |
| October | 33.9°C4 Oct 1997 | -10.6°C19 Oct 1972 | 83 mm7 Oct 1992 | 156 mm2009 · driest 7 mm in 2022 | 64 |
| November | 25.6°C9 Nov 1999 | -26.1°C26 Nov 1977 | 57 mm12 Nov 2015 | 124 mm1991 · driest 0 mm in 1967 | 64 |
| December | 19.4°C2 Dec 1998 | -35.6°C19 Dec 1983 | 42 mm28 Dec 1982 | 79 mm1982 · driest 4 mm in 1962 | 64 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 | 5 |
| February | 0 | 0 | 27 | <1 | 4 |
| March | <1 | 0 | 25 | 2 | 2 |
| April | 2 | <1 | 12 | 3 | <1 |
| May | 7 | 2 | 2 | 4 | 0 |
| June | 19 | 5 | 0 | 4 | 0 |
| July | 25 | 9 | 0 | 4 | 0 |
| August | 22 | 5 | 0 | 3 | 0 |
| September | 12 | 2 | <1 | 3 | 0 |
| October | 3 | <1 | 9 | 2 | <1 |
| November | <1 | 0 | 22 | 1 | 2 |
| December | 0 | 0 | 30 | <1 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 15% | 2% | 10% | -9.5–-0.6°C |
| February | <1% | 13% | 2% | 8% | -6.8–2.5°C |
| March | 3% | 20% | 5% | 20% | 0.5–9.1°C |
| April | 16% | 30% | 9% | 36% | 10.6–17.4°C |
| May | 43% | 33% | 11% | 43% | 18.7–24.2°C |
| June | 64% | 33% | 13% | 41% | 24.4–28.5°C |
| July | 73% | 26% | 11% | 28% | 26.3–31.2°C |
| August | 72% | 27% | 10% | 30% | 25.7–29.0°C |
| September | 57% | 24% | 9% | 26% | 21.0–24.9°C |
| October | 23% | 22% | 6% | 20% | 13.5–18.1°C |
| November | 3% | 17% | 4% | 14% | 1.6–9.2°C |
| December | 0% | 17% | 2% | 12% | -6.2–1.3°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 5021372
- NOAA station
- USC00216287 · OWATONNA
- Station distance
- 19.6 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 44.04°, 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.