SeasonMapBristol weather in September
United Kingdom
September in Bristol: nice, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Bristol · #630 of 1383 destinations to visit in September · comfort 81/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Bristol in September
Other months in Bristol
The UK forum's consistent line on early July: expect roughly 17°C on average with a real chance of rain, and treat any specific forecast as unreliable more than a few days out. Regulars across the south-west give the same standing advice for a trip to Bristol as anywhere else in Britain in summer — pack for both sun and rain, because a single day can bring either.
Add your own note from Bristol's card on the map.
Bristol climate normals — September
| Daytime high | 19°C / 66°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Feels like (high) | 17°C / 63°F | |
| Sea temperature | 19°C / 66°F | 🌊 fresh |
| Rainfall | 76 mm / 3 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 7.4 h/day | |
| Daylight | 12.6 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Bristol in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Bristol's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherBristol's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Bristol — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Bristol?
Bristol in September — FAQ
- Is September a good time to visit Bristol?
- September in Bristol: nice, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Bristol on SeasonMap's comfort score (81/100).
- What is the weather like in Bristol in September?
- In September, Bristol averages a daily high of 18.7°C and a low of 12°C, with about 76.1 mm of rain over roughly 11.3 rainy days.
- What is the air quality in Bristol in September?
- Bristol has a mean US Air Quality Index of about 38 in September.
Other months in Bristol
Compare Bristol in September
Warmer or cooler than Bristol in September
Similar destinations in Northern Europe — September
Within 300 km: Bath's Jane Austen Festival on 11–20 Sep, and Bournemouth's New Forest heather around 1 Aug – 10 Sep.