September
September · August · June
82climate match
United States · 1991–2020
Best time to visit
Dumont.
September leads for comfortable weather in Dumont: typically 23.8°C by day, 11.1°C at night, with 86 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high23.8°C
Typical low11.1°C
Rain in September86 mm
July
July · August · June
70climate match
September
September · October · May
73climate match
The weakest month is January, scoring 5 against September’s 82 — days reach only -3.5°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
5-3.5° / -12.8°
Feb
5-1° / -10.5°
Mar
56.7° / -3.8°
Apr
3415° / 2.4°
May
6321.6° / 9.4°
Jun
6926.9° / 15.4°
Jul
6728.4° / 17.2°
Aug
7627° / 15.7°
Sep
8223.8° / 11.1°
Oct
4916.3° / 4.3°
Nov
97.1° / -3°
Dec
5-0.5° / -9.1°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -3.5°C | -12.8°C | 25 mm | 4 | 9 h 21 | 5 | Strong coverage |
| February | -1°C | -10.5°C | 26 mm | 3.9 | 10 h 28 | 5 | Strong coverage |
| March | 6.7°C | -3.8°C | 45 mm | 5.9 | 11 h 47 | 5 | Strong coverage |
| April | 15°C | 2.4°C | 97 mm | 8.4 | 13 h 19 | 34 | Strong coverage |
| May | 21.6°C | 9.4°C | 126 mm | 10.5 | 14 h 36 | 63 | Strong coverage |
| June | 26.9°C | 15.4°C | 139 mm | 9.5 | 15 h 18 | 69 | Strong coverage |
| July | 28.4°C | 17.2°C | 108 mm | 7.3 | 15 h 02 | 67 | Strong coverage |
| August | 27°C | 15.7°C | 103 mm | 6.8 | 13 h 55 | 76 | Strong coverage |
| September | 23.8°C | 11.1°C | 86 mm | 6.5 | 12 h 26 | 82 | Strong coverage |
| October | 16.3°C | 4.3°C | 63 mm | 6.2 | 10 h 58 | 49 | Strong coverage |
| November | 7.1°C | -3°C | 43 mm | 4.4 | 9 h 41 | 9 | Strong coverage |
| December | -0.5°C | -9.1°C | 36 mm | 4.7 | 9 h 03 | 5 | Strong coverage |
What has changed
Dumont runs -0.3°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
+0.3
Feb
-1.2
Mar
+0.6
Apr
-1.7
May
-1.2
Jun
-0.5
Jul
-1.1
Aug
-0.9
Sep
+1.0
Oct
-0.5
Nov
0.0
Dec
+2.0
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 17.8°C26 Jan 2002 | -34.4°C5 Jan 1924 | 45 mm22 Jan 2018 | 77 mm1929 · driest 0 mm in 1985 | 108 |
| February | 23.9°C27 Feb 2024 | -35.0°C2 Feb 1996 | 43 mm27 Feb 1948 | 87 mm1915 · driest 0 mm in 1968 | 112 |
| March | 29.4°C22 Mar 2026 | -31.7°C11 Mar 1948 | 50 mm30 Mar 1993 | 126 mm1961 · driest 0 mm in 1931 | 109 |
| April | 35.6°C22 Apr 1980 | -15.0°C6 Apr 1982 | 102 mm25 Apr 2008 | 240 mm2008 · driest 11 mm in 1934 | 111 |
| May | 41.1°C31 May 1934 | -3.9°C1 May 1966 | 98 mm17 May 1999 | 287 mm1999 · driest 23 mm in 1934 | 111 |
| June | 40.6°C28 Jun 1934 | 2.2°C4 Jun 1945 | 178 mm26 Jun 1951 | 322 mm1951 · driest 24 mm in 1955 | 112 |
| July | 42.8°C13 Jul 1936 | 5.6°C3 Jul 1917 | 182 mm17 Jul 1968 | 336 mm1968 · driest 8 mm in 1936 | 112 |
| August | 41.7°C18 Aug 1936 | 0.0°C30 Aug 1915 | 133 mm20 Aug 2007 | 337 mm1980 · driest 10 mm in 1950 | 109 |
| September | 38.3°C3 Sep 1939 | -3.9°C28 Sep 1942 | 120 mm8 Sep 1941 | 277 mm2018 · driest 6 mm in 1950 | 110 |
| October | 35.6°C5 Oct 1963 | -17.8°C29 Oct 1925 | 79 mm9 Oct 1970 | 175 mm2009 · driest 0 mm in 1952 | 110 |
| November | 26.7°C8 Nov 1999 | -26.7°C26 Nov 1977 | 66 mm1 Nov 1992 | 171 mm1992 · driest 1 mm in 2007 | 110 |
| December | 21.1°C16 Dec 2021 | -32.8°C10 Dec 1919 | 61 mm29 Dec 2007 | 125 mm2015 · driest 0 mm in 1980 | 111 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 4 |
| February | 0 | 0 | 27 | <1 | 4 |
| March | <1 | 0 | 23 | 2 | 2 |
| April | 3 | <1 | 10 | 4 | <1 |
| May | 10 | 2 | <1 | 4 | 0 |
| June | 21 | 8 | 0 | 5 | 0 |
| July | 27 | 11 | 0 | 4 | 0 |
| August | 24 | 6 | 0 | 3 | 0 |
| September | 14 | 3 | <1 | 3 | 0 |
| October | 3 | <1 | 8 | 2 | <1 |
| November | <1 | 0 | 21 | 2 | 1 |
| December | 0 | 0 | 29 | 1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 14% | 2% | 7% | -7.2–0.7°C |
| February | 0% | 14% | 3% | 8% | -4.9–3.6°C |
| March | 5% | 19% | 6% | 15% | 2.3–10.3°C |
| April | 22% | 26% | 10% | 30% | 11.5–18.2°C |
| May | 48% | 31% | 13% | 37% | 19.6–24.9°C |
| June | 67% | 30% | 14% | 34% | 24.4–29.1°C |
| July | 76% | 24% | 11% | 23% | 27.1–31.7°C |
| August | 77% | 22% | 10% | 21% | 26.2–29.7°C |
| September | 64% | 22% | 10% | 23% | 22.0–26.3°C |
| October | 31% | 18% | 7% | 15% | 14.5–20.3°C |
| November | 3% | 16% | 5% | 11% | 3.7–10.3°C |
| December | 0% | 15% | 3% | 9% | -4.6–3.2°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 4854596
- NOAA station
- USC00130157 · ALLISON
- Station distance
- 14.1 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 42.75°, 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.