September
September · August · June
82climate match
United States · 1991–2020
Best time to visit
Calumet.
September leads for comfortable weather in Calumet: typically 24.1°C by day, 11.4°C at night, with 96 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.1°C
Typical low11.4°C
Rain in September96 mm
July
July · August · June
75climate match
May
May · October · September
73climate match
The weakest month is January, scoring 5 against September’s 82 — days reach only -3.3°C, 27° 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
5-3.3° / -12.8°
Feb
5-0.7° / -10.6°
Mar
77° / -3.9°
Apr
3715.2° / 2.3°
May
6621.7° / 9.2°
Jun
7227.1° / 15.2°
Jul
6828.9° / 17.4°
Aug
7627.4° / 16.2°
Sep
8224.1° / 11.4°
Oct
5016.4° / 4.2°
Nov
107° / -3.4°
Dec
5-0.8° / -9.7°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -3.3°C | -12.8°C | 19 mm | 3.1 | 9 h 20 | 5 | Strong coverage |
| February | -0.7°C | -10.6°C | 21 mm | 3.6 | 10 h 27 | 5 | Strong coverage |
| March | 7°C | -3.9°C | 44 mm | 4.6 | 11 h 47 | 7 | Strong coverage |
| April | 15.2°C | 2.3°C | 85 mm | 7.2 | 13 h 20 | 37 | Strong coverage |
| May | 21.7°C | 9.2°C | 104 mm | 9.9 | 14 h 37 | 66 | Strong coverage |
| June | 27.1°C | 15.2°C | 125 mm | 8.8 | 15 h 20 | 72 | Strong coverage |
| July | 28.9°C | 17.4°C | 96 mm | 6.6 | 15 h 03 | 68 | Strong coverage |
| August | 27.4°C | 16.2°C | 90 mm | 6.6 | 13 h 56 | 76 | Strong coverage |
| September | 24.1°C | 11.4°C | 96 mm | 6.2 | 12 h 26 | 82 | Strong coverage |
| October | 16.4°C | 4.2°C | 59 mm | 5.6 | 10 h 58 | 50 | Strong coverage |
| November | 7°C | -3.4°C | 37 mm | 3.7 | 9 h 40 | 10 | Strong coverage |
| December | -0.8°C | -9.7°C | 26 mm | 3.5 | 9 h 02 | 5 | Strong coverage |
What has changed
Calumet runs +0.6°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
+1.6
Feb
-0.3
Mar
+1.8
Apr
-0.5
May
-0.5
Jun
+0.4
Jul
-0.6
Aug
-0.8
Sep
+1.7
Oct
-0.1
Nov
+1.4
Dec
+2.8
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 17.8°C24 Jan 1981 | -34.4°C15 Jan 1972 | 25 mm26 Jan 1904 | 60 mm2023 · driest 0 mm in 1962 | 93 |
| February | 21.1°C26 Feb 1896 | -38.9°C9 Feb 1899 | 51 mm1 Feb 1904 | 211 mm1904 · driest 0 mm in 1949 | 94 |
| March | 31.1°C21 Mar 2026 | -28.9°C11 Mar 1948 | 76 mm29 Mar 1900 | 118 mm1987 · driest 0 mm in 1994 | 96 |
| April | 33.9°C21 Apr 1980 | -16.7°C4 Apr 2018 | 126 mm29 Apr 1947 | 196 mm1947 · driest 9 mm in 1942 | 95 |
| May | 37.8°C26 May 1967 | -5.6°C3 May 1967 | 121 mm26 May 2013 | 277 mm2013 · driest 17 mm in 1955 | 98 |
| June | 39.4°C20 Jun 1988 | 1.1°C4 Jun 2004 | 122 mm30 Jun 2017 | 322 mm2014 · driest 24 mm in 2012 | 95 |
| July | 43.3°C22 Jul 1901 | 4.4°C9 Jul 1895 | 178 mm14 Jul 1900 | 469 mm1900 · driest 2 mm in 1959 | 98 |
| August | 38.3°C9 Aug 1947 | 3.3°C20 Aug 1950 | 196 mm23 Aug 1973 | 311 mm1975 · driest 14 mm in 1947 | 96 |
| September | 37.8°C6 Sep 1976 | -8.3°C29 Sep 1899 | 170 mm15 Sep 2004 | 322 mm2004 · driest 0 mm in 2011 | 95 |
| October | 33.9°C5 Oct 1963 | -13.3°C29 Oct 1895 | 69 mm17 Oct 1968 | 165 mm2023 · driest 0 mm in 1952 | 94 |
| November | 25.6°C16 Nov 1899 | -25.6°C29 Nov 1897 | 58 mm26 Nov 1896 | 149 mm2015 · driest 0 mm in 1900 | 93 |
| December | 18.9°C6 Dec 1939 | -33.3°C22 Dec 1989 | 34 mm27 Dec 2018 | 69 mm2009 · driest 0 mm in 1979 | 92 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 3 |
| February | 0 | 0 | 27 | <1 | 3 |
| March | <1 | 0 | 23 | 2 | 2 |
| April | 2 | <1 | 10 | 3 | <1 |
| May | 10 | 3 | 1 | 3 | 0 |
| June | 21 | 9 | 0 | 4 | 0 |
| July | 27 | 12 | 0 | 3 | 0 |
| August | 24 | 7 | 0 | 3 | 0 |
| September | 15 | 4 | <1 | 3 | 0 |
| October | 3 | <1 | 8 | 2 | <1 |
| November | 0 | 0 | 21 | 1 | 2 |
| December | 0 | 0 | 29 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 10% | 2% | 3% | -7.7–1.1°C |
| February | <1% | 11% | 2% | 5% | -5.0–4.2°C |
| March | 6% | 16% | 5% | 13% | 1.8–11.6°C |
| April | 26% | 23% | 9% | 26% | 11.8–19.1°C |
| May | 52% | 29% | 11% | 35% | 19.8–25.3°C |
| June | 69% | 29% | 13% | 34% | 24.9–29.5°C |
| July | 77% | 23% | 10% | 21% | 27.3–31.8°C |
| August | 77% | 22% | 9% | 19% | 26.3–31.1°C |
| September | 67% | 21% | 9% | 20% | 21.5–27.0°C |
| October | 34% | 16% | 6% | 13% | 14.7–20.6°C |
| November | 4% | 12% | 4% | 7% | 3.2–11.2°C |
| December | 0% | 11% | 2% | 4% | -4.3–3.4°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 4850079
- NOAA station
- USC00136800 · PRIMGHAR
- Station distance
- 16.8 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 42.95°, 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.