September
September · June · August
81climate match
United States · 1991–2020
Best time to visit
Middleton.
September leads for comfortable weather in Middleton: typically 24.5°C by day, 12.3°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.5°C
Typical low12.3°C
Rain in September97 mm
July
July · August · June
72climate match
May
May · September · October
76climate match
The weakest month is January, scoring 5 against September’s 81 — days reach only 3.6°C, 20° 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
53.6° / -7.4°
Feb
55.1° / -6.8°
Mar
58.7° / -2.7°
Apr
3315.2° / 3°
May
6521.2° / 8.7°
Jun
7526° / 13.9°
Jul
6529° / 17.2°
Aug
7228.3° / 16.4°
Sep
8124.5° / 12.3°
Oct
4718.3° / 6°
Nov
2012° / 0.9°
Dec
56.3° / -4°
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 3.6°C | -7.4°C | 89 mm | 8.1 | 4.9°C | 9 h 22 | 5 | Strong coverage |
| February | 5.1°C | -6.8°C | 83 mm | 7.6 | 3.3°C | 10 h 29 | 5 | Strong coverage |
| March | 8.7°C | -2.7°C | 115 mm | 8.4 | 3.5°C | 11 h 48 | 5 | Strong coverage |
| April | 15.2°C | 3°C | 110 mm | 9.7 | 5.8°C | 13 h 19 | 33 | Strong coverage |
| May | 21.2°C | 8.7°C | 95 mm | 10 | 10.1°C | 14 h 35 | 65 | Strong coverage |
| June | 26°C | 13.9°C | 108 mm | 9.5 | 14.7°C | 15 h 17 | 75 | Strong coverage |
| July | 29°C | 17.2°C | 100 mm | 8.7 | 18.2°C | 15 h 01 | 65 | Strong coverage |
| August | 28.3°C | 16.4°C | 84 mm | 7.6 | 18.8°C | 13 h 54 | 72 | Strong coverage |
| September | 24.5°C | 12.3°C | 97 mm | 7.7 | 17.0°C | 12 h 26 | 81 | Strong coverage |
| October | 18.3°C | 6°C | 122 mm | 9 | 13.5°C | 10 h 58 | 47 | Strong coverage |
| November | 12°C | 0.9°C | 101 mm | 9.3 | 10.2°C | 9 h 42 | 20 | Strong coverage |
| December | 6.3°C | -4°C | 123 mm | 9 | 7.5°C | 9 h 04 | 5 | Strong coverage |
What has changed
Middleton runs +0.9°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
+0.9
Feb
+1.1
Mar
+0.5
Apr
+0.8
May
+1.0
Jun
+0.4
Jul
+1.5
Aug
+1.1
Sep
+1.2
Oct
+0.5
Nov
+0.4
Dec
+1.3
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C6 Jan 2007 | -30.0°C22 Jan 1984 | 75 mm25 Jan 1979 | 282 mm1979 · driest 12 mm in 1980 | 91 |
| February | 25.6°C21 Feb 2018 | -26.7°C16 Feb 1943 | 70 mm7 Feb 1978 | 189 mm1981 · driest 8 mm in 1987 | 91 |
| March | 30.0°C31 Mar 1998 | -21.1°C19 Mar 1967 | 123 mm14 Mar 2010 | 488 mm2010 · driest 18 mm in 1990 | 92 |
| April | 33.9°C17 Apr 2002 | -13.3°C7 Apr 1982 | 105 mm5 Apr 1987 | 311 mm2004 · driest 16 mm in 1999 | 91 |
| May | 36.1°C28 May 2007 | -2.8°C13 May 1994 | 164 mm14 May 2006 | 438 mm2006 · driest 14 mm in 1944 | 92 |
| June | 40.6°C28 Jun 1991 | 1.7°C6 Jun 1964 | 119 mm13 Jun 1998 | 315 mm1982 · driest 5 mm in 1999 | 91 |
| July | 38.3°C4 Jul 2018 | 5.6°C4 Jul 1962 | 99 mm30 Jul 1976 | 321 mm2021 · driest 9 mm in 1939 | 92 |
| August | 38.9°C3 Aug 1975 | 0.6°C31 Aug 1965 | 110 mm20 Aug 1955 | 265 mm1955 · driest 22 mm in 1948 | 91 |
| September | 35.6°C8 Sep 2015 | -2.8°C22 Sep 1962 | 148 mm12 Sep 1954 | 277 mm1954 · driest 5 mm in 1948 | 91 |
| October | 31.1°C7 Oct 1963 | -9.4°C31 Oct 2020 | 220 mm6 Oct 1962 | 357 mm1996 · driest 10 mm in 1947 | 91 |
| November | 26.7°C5 Nov 1994 | -19.4°C24 Nov 1989 | 83 mm14 Nov 2009 | 297 mm1983 · driest 17 mm in 1976 | 91 |
| December | 23.3°C6 Dec 2001 | -26.7°C31 Dec 1963 | 87 mm19 Dec 1986 | 243 mm1969 · driest 16 mm in 1982 | 90 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 3 | 5 |
| February | <1 | 0 | 25 | 3 | 5 |
| March | <1 | 0 | 22 | 4 | 3 |
| April | 2 | <1 | 9 | 4 | <1 |
| May | 8 | 2 | <1 | 3 | 0 |
| June | 18 | 7 | 0 | 3 | 0 |
| July | 27 | 13 | 0 | 3 | 0 |
| August | 26 | 10 | 0 | 3 | 0 |
| September | 14 | 3 | <1 | 3 | 0 |
| October | 3 | 0 | 4 | 3 | <1 |
| November | <1 | 0 | 15 | 3 | <1 |
| December | 0 | 0 | 25 | 5 | 3 |
The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 85); on 2011–2025 it is September (86). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 27% | 10% | 30% | -0.2–5.8°C |
| February | <1% | 27% | 11% | 30% | 1.5–7.2°C |
| March | 2% | 27% | 11% | 30% | 5.8–10.3°C |
| April | 13% | 31% | 11% | 37% | 12.1–16.8°C |
| May | 42% | 31% | 9% | 36% | 18.2–22.7°C |
| June | 67% | 29% | 9% | 35% | 22.9–27.1°C |
| July | 74% | 26% | 9% | 29% | 26.1–30.1°C |
| August | 75% | 25% | 9% | 25% | 24.9–29.1°C |
| September | 62% | 24% | 9% | 25% | 21.2–25.5°C |
| October | 27% | 25% | 10% | 26% | 15.7–20.1°C |
| November | 5% | 29% | 11% | 31% | 9.1–13.9°C |
| December | <1% | 27% | 12% | 31% | 2.5–8.1°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 4943926
- NOAA station
- USC00194744 · MIDDLETON
- Station distance
- 0.3 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 42.60°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 27 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.