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West Islip weather

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West Islip weather alerts and warnings

active National Weather Service watches, warnings and advisories

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West Islip weather in numbers

from 30 years of measured normals

West Islip swings 52°F across the year, from 82°F highs in July to 30°F lows in February, and March is usually the wettest month in a year that brings about 55 in of precipitation.

Warmest month
July
82°F average high
Coldest month
February
30°F average low
Wettest month
March
55 in a year
Below freezing
1 month
February
Comfortable
4 months
May, June, September and October
Residents
28,000
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The weather map: all three models at once

NWS, American, European side by side around West Islip and nearby towns.Live rain radar →
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West Islip hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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West Islip 10-day forecast, out to 14 days

where the models agree, and where they split

West Islip, New York (NY) is at its warmest in Jul (average highs near 82°F) and coldest in Feb (lows around 30°F), with roughly 55 in of precipitation across the year. Below, compare what NWS, American, European forecast for West Islip right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

West Islip climate by month

average daytime high and overnight low across a typical year
Jan
44°
32°
Feb
44°
30°
Mar
51°
36°
Apr
58°
44°
May
67°
52°
Jun
76°
62°
Jul
82°
70°
Aug
80°
67°
Sep
74°
61°
Oct
66°
52°
Nov
54°
41°
Dec
46°
34°

Which forecast is most accurate in West Islip?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
91
/100rank #1
95±0.5°F98±0.7 mph8290% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
71
/100rank #2
85±1.5°F90±3.2 mph4268% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Common questions

What's the weather in West Islip today?
On this page we show what NWS, American, European each forecast for West Islip today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in West Islip today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for West Islip and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for West Islip?
Over the last 30 days, the European model has been the most accurate for West Islip (CheckWeather Score 91/100), ahead of the American at 71. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in West Islip?
July is typically the warmest month in West Islip, with average highs around 82°F.
How cold does West Islip get?
The coldest month in West Islip is February, when overnight lows average about 30°F.
How much rain does West Islip get?
West Islip sees roughly 55 in of precipitation a year, with March usually the wettest month.

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