Warm
Average highs sit around 26°C, giving warm days by monthly-average standards.
September verdict
Dover, Delaware, United States in September
Weather score65Good
Good for holiday weather
Average highs sit around 26°C, giving warm days by monthly-average standards. Sunshine averages 7.4h per day, enough for a balanced month. Rainfall averages 103mm, so some wet days are possible.
September weather
Monthly averages
Temp
26°C
Rain
103mm
Sun
7.4h
Sea
23°C
Weather score
65
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 103mm, so some wet days are possible.
Some sun
Sunshine averages 7.4h per day, enough for a balanced month.
Swimmable
Sea temperatures average 23°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Dover, Delaware, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September26°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
September103mm average rain
September is one of Dover's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to July and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September7.4 hours average sun
September sits close to Dover'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
September23°C average sea
September is one of Dover's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJune to September
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
September65 weather score
September scores above Dover'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.
