Mild
Average highs are around 25°C, so days are mild rather than hot.
September verdict
New Castle, Delaware, United States in September
Weather score65Good
Good for holiday weather
Average highs are around 25°C, so days are mild rather than hot. Sunshine averages 7.2h per day, enough for a balanced month. Rainfall averages 97mm, so some wet days are possible.
September weather
Monthly averages
Temp
25°C
Rain
97mm
Sun
7.2h
Weather score
65
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 97mm, so some wet days are possible.
Some sun
Sunshine averages 7.2h per day, enough for a balanced month.
Map
Weather map
Compare New Castle, Delaware, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September25°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
September97mm average rain
September sits near New Castle's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to June and August to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September7.2 hours average sun
September sits close to New Castle'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.
Weather score
September65 weather score
September scores above New Castle's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
