THINGS TO DO · YOUTUBE SHORT
Heckscher State Park, East Islip, NY, US - Part 1
A local activity video shared by OurTrip Videos.
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Weather · December
Islip weather in December
Average highs of 44°F, lows of 30°F and 4.7 in of rain, from 30 years of weather records.
December is Islip’s 10th warmest month, with average highs of 44°F and lows of 30°F. That is 9° cooler than November, and 17° below the yearly average high.
- Average high
- 44°F
- Average low
- 30°F
- Precipitation
- 4.7 in
- Wet days
- 12
- Snow
- 4.5 in
- Sunrise · sunset
- 7:09 AM · 4:26 PM
December across the year
High and low Rain
What to wear in December
- Cold days: a winter coat, hat and gloves.
- Freezing nights: expect frost on cars in the morning.
- Pack an umbrella or rain jacket: rain or snow falls on about 12 days this month.
- Snow is likely (about 5 inches on average): waterproof boots help.
December is good for
What’s on in Islip in December
- Annual Holiday Tree Lighting at Bayard Cutting ArboretumFriday, December 4 · 5:00-8:00 p.m. · Bayard Cutting Arboretum, Great River
- Movies on Main: Santa Claus: The MovieFriday, December 4 · 6:00 p.m. · Town Hall West, Islip
- Sayville Chamber Menorah LightingFriday, December 4 · 5:30 p.m. · Sayville Chamber House, Sayville
- Holiday Lights Drive-Thru at Brookwood HallSaturday, December 5 · 5:00-8:00 p.m. · Brookwood Hall, East Islip
- Holiday Manor House Tours at Bayard Cutting ArboretumDecember 5 – December 31 · Day tours 10:30 a.m., 11:30 a.m. and 12:30 p.m. · Bayard Cutting Arboretum, Great River
- Islip Town Hall Christmas Tree LightingSaturday, December 5 · 6:00 p.m. · Islip Town Hall, Islip
- Santa Comes to Town ParadeSaturday, December 5 · 5:00 p.m. · Main Street to Islip Town Hall, Islip
- Town of Islip Holiday MarketSaturday, December 5 · 1:00-7:00 p.m. · Islip Town Hall, Islip
- Noon Year's Eve Celebration at Sayville LibraryThursday, December 31 · 11:30 a.m.-12:15 p.m. · Sayville Library, Sayville
See all upcoming events and school days off.
Around Islip
See Islip
A look around town before you go.
THINGS TO DO · YOUTUBE SHORT
Living Large: Islip
A local activity video shared by CBS New York.
Watch on YouTube ↗December compared with the months around it
Planning a trip? See the best time to visit Islip and today’s forecast.
Questions
How hot does it get in Islip in December?
Average highs are 44°F and average lows 30°F, for a daily mean of 37°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in Islip in December?
December averages 4.7 in of precipitation over about 12 days with at least 0.01 in. It is the wettest month of the year.
Does it snow in Islip in December?
Yes, about 4.5 in of snow on average.
What time is sunset in Islip in December?
Around mid-December the sun rises about 7:09 AM and sets about 4:26 PM, for roughly 9.3 hours of daylight.
Is December a good time to visit Islip?
The mildest months for visiting are May, July, September. December is cold, with Christmas lights and New Year’s Eve events.
NOAA U.S. Climate Normals 1991–2020, Islip Li Macarthur Ap station (9.7 mi from downtown). Sunrise and sunset are calculated for December 15 at the city’s coordinates.