September
September · June · August
83climate match
United States · 1991–2020
Best time to visit
Avon.
September leads for comfortable weather in Avon: typically 24.8°C by day, 11°C at night, with 69 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.8°C
Typical low11°C
Rain in September69 mm
July
July · August · June
75climate match
May
May · September · October
75climate 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° / -12.3°
Feb
51.4° / -10.2°
Mar
118° / -4.3°
Apr
3714.9° / 1.9°
May
6521.4° / 8.9°
Jun
7727.3° / 15.2°
Jul
6530.2° / 17.8°
Aug
7128.8° / 16.3°
Sep
8324.8° / 11°
Oct
5016.8° / 3.2°
Nov
127.9° / -4°
Dec
50.7° / -9.7°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -1.4°C | -12.3°C | 14 mm | 3 | 9 h 20 | 5 | Strong coverage |
| February | 1.4°C | -10.2°C | 21 mm | 3.6 | 10 h 27 | 5 | Strong coverage |
| March | 8°C | -4.3°C | 34 mm | 4.9 | 11 h 47 | 11 | Strong coverage |
| April | 14.9°C | 1.9°C | 73 mm | 7.4 | 13 h 20 | 37 | Strong coverage |
| May | 21.4°C | 8.9°C | 99 mm | 9.5 | 14 h 38 | 65 | Strong coverage |
| June | 27.3°C | 15.2°C | 86 mm | 8.7 | 15 h 20 | 77 | Strong coverage |
| July | 30.2°C | 17.8°C | 85 mm | 6.4 | 15 h 03 | 65 | Strong coverage |
| August | 28.8°C | 16.3°C | 87 mm | 7.2 | 13 h 56 | 71 | Strong coverage |
| September | 24.8°C | 11°C | 69 mm | 5.7 | 12 h 26 | 83 | Strong coverage |
| October | 16.8°C | 3.2°C | 55 mm | 5.6 | 10 h 57 | 50 | Strong coverage |
| November | 7.9°C | -4°C | 26 mm | 3.6 | 9 h 40 | 12 | Strong coverage |
| December | 0.7°C | -9.7°C | 20 mm | 3.3 | 9 h 01 | 5 | Strong coverage |
What has changed
Avon 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
+0.4
Feb
-1.1
Mar
+0.8
Apr
-2.1
May
-1.6
Jun
-0.2
Jul
-1.1
Aug
-1.5
Sep
+1.0
Oct
-0.8
Nov
+1.0
Dec
+1.3
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.7°C6 Jan 2012 | -38.9°C12 Jan 1912 | 50 mm3 Jan 1949 | 56 mm1949 · driest 0 mm in 1900 | 129 |
| February | 24.4°C28 Feb 2016 | -40.6°C2 Feb 1905 | 35 mm19 Feb 1971 | 67 mm1915 · driest 0 mm in 1923 | 129 |
| March | 35.6°C30 Mar 1943 | -28.3°C4 Mar 1960 | 104 mm18 Mar 1905 | 159 mm1987 · driest 0 mm in 1900 | 129 |
| April | 37.2°C28 Apr 1894 | -19.4°C3 Apr 1936 | 83 mm30 Apr 1911 | 204 mm1927 · driest 1 mm in 1926 | 129 |
| May | 41.7°C30 May 1934 | -6.7°C3 May 1967 | 155 mm21 May 1903 | 291 mm1903 · driest 4 mm in 1940 | 126 |
| June | 42.2°C21 Jun 1988 | 0.6°C6 Jun 1901 | 106 mm11 Jun 1944 | 265 mm2005 · driest 19 mm in 1900 | 128 |
| July | 46.1°C17 Jul 1936 | 4.4°C10 Jul 1902 | 89 mm4 Jul 2004 | 260 mm1962 · driest 6 mm in 1930 | 127 |
| August | 45.0°C24 Aug 1936 | 2.2°C30 Aug 1915 | 117 mm6 Aug 2023 | 248 mm1906 · driest 8 mm in 1983 | 127 |
| September | 41.1°C5 Sep 1922 | -6.1°C20 Sep 1918 | 123 mm16 Sep 2016 | 196 mm1973 · driest 0 mm in 1899 | 126 |
| October | 36.7°C20 Oct 1947 | -15.6°C29 Oct 1913 | 75 mm29 Oct 1896 | 181 mm1911 · driest 0 mm in 1952 | 127 |
| November | 28.9°C7 Nov 2009 | -28.3°C14 Nov 1959 | 44 mm21 Nov 1979 | 108 mm1983 · driest 0 mm in 1939 | 127 |
| December | 21.1°C6 Dec 1939 | -37.8°C29 Dec 1917 | 31 mm21 Dec 2006 | 73 mm2006 · driest 0 mm in 1895 | 127 |
| 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 | 24 | <1 | 3 |
| April | 3 | <1 | 11 | 3 | 1 |
| May | 10 | 3 | 1 | 4 | <1 |
| June | 22 | 10 | 0 | 3 | 0 |
| July | 28 | 17 | 0 | 3 | 0 |
| August | 27 | 13 | 0 | 3 | 0 |
| September | 16 | 6 | <1 | 2 | 0 |
| October | 4 | 1 | 9 | 2 | <1 |
| November | <1 | 0 | 23 | 1 | 2 |
| December | 0 | 0 | 31 | <1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 9% | <1% | 4% | -6.1–4.0°C |
| February | <1% | 12% | 1% | 6% | -3.8–6.7°C |
| March | 9% | 16% | 3% | 13% | 2.3–12.6°C |
| April | 28% | 23% | 7% | 25% | 12.7–19.3°C |
| May | 53% | 28% | 10% | 33% | 19.8–25.4°C |
| June | 69% | 29% | 10% | 31% | 25.3–30.4°C |
| July | 77% | 23% | 8% | 21% | 28.6–33.8°C |
| August | 77% | 23% | 8% | 19% | 27.6–32.4°C |
| September | 70% | 19% | 7% | 18% | 22.2–28.2°C |
| October | 41% | 15% | 5% | 10% | 15.4–21.8°C |
| November | 7% | 11% | 3% | 6% | 4.6–12.5°C |
| December | <1% | 10% | 1% | 5% | -3.2–4.9°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 5226101
- NOAA station
- USC00398472 · TYNDALL
- Station distance
- 15.5 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 30 usable years
- Daylight
- Calculated from latitude 43.01°, 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.