Warm
Average highs sit around 27°C, giving warm days by monthly-average standards.
Weather Guide
Riverhead, New York, United States Average Monthly Weather
Weather score42Mixed annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 15°C, sunshine averages 7.1h per day, and rainfall totals about 1124mm. Sea temperatures average 13°C across the year.
Annual weather
Annual averages
Temp
15°C
Rain
1124mm
Annual total
Sun
7.1h
Sea
13°C
Weather score
42
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 108mm, so some wet days are possible.
Bright
Sunshine averages 8.3h per day, so bright days are a strong part of the month.
Swimmable
Sea temperatures average 23°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Riverhead, New York, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August27°C average high
August is one of Riverhead's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August108mm average rain
August is one of Riverhead's wettest months, so rain is likely to be a major planning factor.
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
August8.3 hours average sun
August is brighter than Riverhead's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August23°C average sea
August 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
August70 weather score
August is one of Riverhead's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
