September
September · June · August
76climate match
United States · 1991–2020
Best time to visit
Bristol.
September leads for comfortable weather in Bristol: typically 24°C by day, 11.1°C at night, with 126 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24°C
Typical low11.1°C
Rain in September126 mm
July
July · August · June
65climate match
May
May · September · October
72climate match
The weakest month is January, scoring 5 against September’s 76 — days reach only 2.3°C, 22° 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
52.3° / -8.5°
Feb
54° / -7.8°
Mar
58.3° / -3.6°
Apr
3215.3° / 2°
May
6321.4° / 8°
Jun
7325.9° / 13.1°
Jul
6628.7° / 16.1°
Aug
6927.7° / 15.1°
Sep
7624° / 11.1°
Oct
3917.3° / 4.6°
Nov
1711.1° / -0.4°
Dec
55.3° / -5°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 2.3°C | -8.5°C | 93 mm | 8.5 | 9 h 28 | 5 | Strong coverage |
| February | 4°C | -7.8°C | 86 mm | 7.6 | 10 h 32 | 5 | Strong coverage |
| March | 8.3°C | -3.6°C | 106 mm | 8.6 | 11 h 48 | 5 | Strong coverage |
| April | 15.3°C | 2°C | 110 mm | 9.1 | 13 h 16 | 32 | Strong coverage |
| May | 21.4°C | 8°C | 104 mm | 10.1 | 14 h 30 | 63 | Strong coverage |
| June | 25.9°C | 13.1°C | 123 mm | 9.2 | 15 h 11 | 73 | Strong coverage |
| July | 28.7°C | 16.1°C | 113 mm | 9.2 | 14 h 55 | 66 | Strong coverage |
| August | 27.7°C | 15.1°C | 132 mm | 8.6 | 13 h 51 | 69 | Strong coverage |
| September | 24°C | 11.1°C | 126 mm | 7.6 | 12 h 25 | 76 | Strong coverage |
| October | 17.3°C | 4.6°C | 144 mm | 8.1 | 11 h 01 | 39 | Strong coverage |
| November | 11.1°C | -0.4°C | 99 mm | 7.4 | 9 h 46 | 17 | Strong coverage |
| December | 5.3°C | -5°C | 125 mm | 9.1 | 9 h 10 | 5 | Strong coverage |
What has changed
Bristol runs +1.7°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
+2.0
Feb
+2.4
Mar
+1.6
Apr
+1.1
May
+1.2
Jun
+1.3
Jul
+1.9
Aug
+1.5
Sep
+2.1
Oct
+1.6
Nov
+1.0
Dec
+2.7
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 22.2°C7 Jan 2007 | -27.8°C22 Jan 1984 | 95 mm10 Jan 2024 | 308 mm1979 · driest 14 mm in 1970 | 64 |
| February | 26.7°C22 Feb 2018 | -31.7°C14 Feb 2016 | 76 mm3 Feb 2007 | 260 mm1981 · driest 10 mm in 1987 | 64 |
| March | 28.3°C29 Mar 1998 | -21.1°C19 Mar 1967 | 122 mm22 Mar 1980 | 276 mm1983 · driest 13 mm in 1981 | 64 |
| April | 34.4°C18 Apr 2002 | -10.6°C1 Apr 1969 | 134 mm16 Apr 2007 | 292 mm1983 · driest 17 mm in 1999 | 63 |
| May | 35.0°C21 May 1996 | -5.6°C1 May 1992 | 160 mm13 May 2006 | 320 mm1984 · driest 18 mm in 1993 | 64 |
| June | 37.8°C24 Jun 2025 | -2.8°C11 Jun 1972 | 156 mm6 Jun 1982 | 358 mm2013 · driest 5 mm in 1999 | 64 |
| July | 37.8°C21 Jul 1991 | 2.8°C3 Jul 2001 | 98 mm1 Jul 1998 | 370 mm2023 · driest 36 mm in 2001 | 62 |
| August | 36.7°C3 Aug 1975 | 1.7°C30 Aug 1965 | 189 mm28 Aug 2011 | 425 mm2011 · driest 19 mm in 1981 | 65 |
| September | 36.1°C9 Sep 2015 | -4.4°C22 Sep 1991 | 197 mm17 Sep 1999 | 379 mm1999 · driest 20 mm in 1986 | 65 |
| October | 31.7°C7 Oct 2007 | -8.9°C31 Oct 2020 | 183 mm15 Oct 2005 | 510 mm2005 · driest 8 mm in 1963 | 65 |
| November | 28.3°C15 Nov 1993 | -17.2°C22 Nov 1987 | 71 mm12 Nov 1995 | 259 mm1988 · driest 9 mm in 1976 | 62 |
| December | 23.9°C8 Dec 1998 | -25.0°C26 Dec 1980 | 109 mm18 Dec 2023 | 264 mm2023 · driest 21 mm in 1980 | 61 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 3 | 3 |
| February | 0 | 0 | 25 | 3 | 3 |
| March | <1 | 0 | 23 | 3 | 2 |
| April | 2 | <1 | 10 | 3 | <1 |
| May | 9 | 3 | <1 | 3 | 0 |
| June | 18 | 6 | 0 | 4 | 0 |
| July | 26 | 12 | 0 | 4 | 0 |
| August | 25 | 9 | 0 | 4 | 0 |
| September | 14 | 3 | <1 | 4 | 0 |
| October | 2 | <1 | 6 | 4 | <1 |
| November | <1 | 0 | 18 | 3 | <1 |
| December | 0 | 0 | 26 | 4 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 28% | 10% | 31% | -1.2–4.5°C |
| February | <1% | 27% | 10% | 31% | 0.3–6.3°C |
| March | 3% | 29% | 11% | 35% | 5.4–10.9°C |
| April | 16% | 32% | 11% | 40% | 12.6–17.0°C |
| May | 46% | 32% | 11% | 43% | 19.0–23.4°C |
| June | 66% | 30% | 11% | 34% | 24.0–27.5°C |
| July | 72% | 28% | 12% | 30% | 26.5–30.2°C |
| August | 73% | 26% | 12% | 28% | 25.5–29.0°C |
| September | 61% | 24% | 11% | 26% | 21.4–25.4°C |
| October | 26% | 23% | 10% | 23% | 15.3–19.3°C |
| November | 4% | 28% | 12% | 31% | 8.3–13.9°C |
| December | <1% | 27% | 12% | 32% | 1.5–7.5°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 5282835
- NOAA station
- USC00060973 · BURLINGTON
- Station distance
- 13.7 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 41.67°, 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.