Cool
Average highs are around 6°C, so pack for cooler days.
December verdict
Central Islip, New York, United States in December
Weather score23Poor
Poor for holiday weather
Average highs are around 6°C, so pack for cooler days. Sunshine averages 4.5h per day, so this is not one of the brighter months. Rainfall averages 107mm, so some wet days are possible.
December weather
Monthly averages
Temp
6°C
Rain
107mm
Sun
4.5h
Sea
9°C
Weather score
23
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 107mm, so some wet days are possible.
Limited sun
Sunshine averages 4.5h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 9°C, so the water can feel cool.
Map
Weather map
Compare Central Islip, New York, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December6°C average high
December is on the cooler side of Central Islip's year, useful if you prefer less intense daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
December107mm average rain
December is close to Central Islip's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
December4.5 hours average sun
December is one of Central Islip's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December9°C average sea
December is below Central Islip's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 22°C in this stretch, so swimming comfort is at its strongest.
Weather score
December23 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
