West Islip Climate by Month
West Islip, New York, United States
Warm summers and cold winters, with rain spread through the year.
Warm summers and cold winters, with rain spread through the year: that's West Islip's climate in short. Afternoon highs range from 39°F (4°C) in January to 83°F (28°C) in July, and January nights average 26°F (-4°C). It gets 42 in (1070 mm) of rain a year, spread across the months.
- Warmest month
- 83°F(28°C)
- Average high, July
- Coldest nights
- 26°F(-4°C)
- Average low, January
- Rain per year
- 42 in(1070 mm)
- No clear rainy season
- Humidity
- 69%
- Sunniest: July
Best and worst months in West Islip
Best for weatherJune and September are the best time for weather in West Islip: highs near 76°F (25°C) and about 3.2 in (82 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 39°F (4°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
West Islip weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 39°F(4°C) | 26°F(-4°C) | 3.2 in(81 mm) | 65% | 1.8 |
| FebFebruary | 41°F(5°C) | 26°F(-3°C) | 3.1 in(78 mm) | 61% | 2.7 |
| MarMarch | 49°F(9°C) | 33°F(1°C) | 4.2 in(107 mm) | 69% | 3.6 |
| AprApril | 59°F(15°C) | 42°F(6°C) | 3.5 in(90 mm) | 64% | 4.6 |
| MayMay | 68°F(20°C) | 52°F(11°C) | 3.1 in(78 mm) | 68% | 5.4 |
| JunJuneBest | 78°F(25°C) | 62°F(16°C) | 3.3 in(84 mm) | 73% | 5.8 |
| JulJuly | 83°F(28°C) | 68°F(20°C) | 3.4 in(86 mm) | 70% | 5.8 |
| AugAugust | 82°F(28°C) | 67°F(19°C) | 4.1 in(103 mm) | 73% | 5.2 |
| SepSeptemberBest | 75°F(24°C) | 60°F(15°C) | 3.1 in(80 mm) | 74% | 4.1 |
| OctOctober | 64°F(18°C) | 48°F(9°C) | 3.9 in(99 mm) | 71% | 2.9 |
| NovNovember | 54°F(12°C) | 39°F(4°C) | 3.3 in(84 mm) | 74% | 2.0 |
| DecDecember | 44°F(7°C) | 31°F(-1°C) | 3.9 in(100 mm) | 66% | 1.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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