Monthly Historical AveragesIslandia, NY
Average Temperature
High
20°
Feels 20
Low
11°
Feels 10
Average Precipitation
11 Days
75.9mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastMonday, May 18, 2026
Day
27°Feels 28
Wind
17 km/h S
Gust
34 km/h
Humidity
55%
P.O.P
20%
Night
17°Feels 16
Wind
21 km/h SW
Gust
36 km/h
Humidity
88%
P.O.P
30%
Historical AveragesMay 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity