Cool
Average highs are around 18°C, so pack for cooler days.
September verdict
Poor for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 4h per day, so this is not one of the brighter months. Rainfall averages 63mm, which is relatively low for holiday planning.

Monthly averages
Temp
18°C
Rain
63mm
Sun
4h
Weather score
37
Poor
Cool
Average highs are around 18°C, so pack for cooler days.
Drier
Rainfall averages 63mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4h per day, so this is not one of the brighter months.
Map
Compare Chester, United Kingdom with nearby places by weather score, rain, sun, temperature, and swim conditions.
September18°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
September63mm average rain
September is close to Chester's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
September4 hours average sun
September sits close to Chester's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
September37 weather score
September sits close to Chester's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.