Mild
Average highs are around 23°C, so days are mild rather than hot.
September verdict
Riverhead, New York, United States in September
Weather score59Good
Good for holiday weather
Average highs are around 23°C, so days are mild rather than hot. Sunshine averages 7.3h per day, enough for a balanced month. Rainfall averages 88mm, so some wet days are possible.
September weather
Monthly averages
Temp
23°C
Rain
88mm
Sun
7.3h
Sea
22°C
Weather score
59
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 88mm, so some wet days are possible.
Some sun
Sunshine averages 7.3h per day, enough for a balanced month.
Cool sea
Sea temperatures average 22°C, so the water can feel cool.
Map
Weather map
Compare Riverhead, New York, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September23°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
September88mm average rain
September sits near Riverhead's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to February, April to July, and September to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September7.3 hours average sun
September sits close to Riverhead's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September22°C average sea
September is one of Riverhead's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 22°C in this stretch, so swimming comfort is at its strongest.
Weather score
September59 weather score
September scores above Riverhead's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
