Monthly weather forecast and climate
Islip, NY

What is the coldest month in Islip?

The coldest month in Islip, New York, is January, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 23.4°F (-4.8°C).

How many days does it rain in Islip?

Throughout the year, there are 118.9 rainfall days, and 46.2" (1174.5mm) of precipitation is accumulated.

When does it snow in Islip?

Months with snowfall are January through April, November and December.

How many days does it snow in Islip?

In Islip, New York, during the entire year, snow falls for 12.3 days, and aggregates up to 24.8" (629.9mm) of snow.

What is the driest month in Islip?

February is the month with the least rainfall. Rain falls for 9.1 days and accumulates 3.3" (82.8mm) of precipitation.

What is the snowiest month in Islip?

February is the month with the most snowfall. Snow falls for 3.4 days and accumulates 7.1" (180.3mm) of snow.

What is the wettest month in Islip?

March is the month with the most rainfall in Islip, New York. Rain falls for 10.5 days and accumulates 4.4" (112.8mm) of precipitation.

What is the warmest month in Islip?

With an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 66°F (18.9°C), July is the warmest month.
Average rainfall - Islip, NY
Average rainfall days - Islip, NY

The month with the highest number of rainy days is April (11.3 days).
Months with the lowest number of rainy days are August and October (8.5 days).

Average snowfall - Islip, NY
Average snowfall days - Islip, NY

The month with the highest number of snowfall days is January (3.7 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature - Islip, NY

The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

Average daylight - Islip, NY

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

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