Cool
Average highs are around 18°C, so pack for cooler days.
September verdict
Grimsby, United Kingdom in September
Weather score35Poor
Poor for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 4.5h per day, so this is not one of the brighter months. Rainfall averages 53mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
18°C
Rain
53mm
Sun
4.5h
Sea
14°C
Weather score
35
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 53mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.5h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 14°C, so the water can feel cool.
Map
Weather map
Compare Grimsby, United Kingdom with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
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.
Rain
September53mm average rain
September is close to Grimsby's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
September4.5 hours average sun
September sits close to Grimsby'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.
Sea temperature
September14°C average sea
September is one of Grimsby's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
September35 weather score
September scores above Grimsby's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
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