Central Islip Climate by Month
Central Islip, New York, United States
Warm summers and cold winters, with rain spread through the year.
The climate in Central Islip is one of warm summers and cold winters, with rain spread through the year. July is the warmest month, with highs around 83°F (28°C); January is the coolest at 39°F (4°C), and nights dip to 25°F (-4°C). It gets 42 in (1069 mm) of rain a year, spread across the months.
- Warmest month
- 83°F(28°C)
- Average high, July
- Coldest nights
- 25°F(-4°C)
- Average low, January
- Rain per year
- 42 in(1069 mm)
- No clear rainy season
- Humidity
- 68%
- Sunniest: July
Best and worst months in Central Islip
Best for weatherJune and September are the best time for weather in Central Islip: highs near 76°F (25°C) and about 3.3 in (84 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)
Central Islip weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 39°F(4°C) | 25°F(-4°C) | 3.3 in(83 mm) | 65% | 1.8 |
| FebFebruary | 41°F(5°C) | 26°F(-3°C) | 3.0 in(77 mm) | 62% | 2.7 |
| MarMarch | 49°F(9°C) | 33°F(1°C) | 4.2 in(107 mm) | 58% | 3.6 |
| AprApril | 59°F(15°C) | 42°F(5°C) | 3.7 in(93 mm) | 65% | 4.6 |
| MayMay | 69°F(20°C) | 51°F(11°C) | 3.1 in(78 mm) | 68% | 5.4 |
| JunJuneBest | 77°F(25°C) | 61°F(16°C) | 3.4 in(87 mm) | 70% | 5.8 |
| JulJuly | 83°F(28°C) | 67°F(20°C) | 3.3 in(83 mm) | 71% | 5.8 |
| AugAugust | 81°F(27°C) | 66°F(19°C) | 3.8 in(97 mm) | 74% | 5.2 |
| SepSeptemberBest | 75°F(24°C) | 59°F(15°C) | 3.2 in(81 mm) | 75% | 4.1 |
| OctOctober | 64°F(18°C) | 48°F(9°C) | 3.9 in(98 mm) | 72% | 2.9 |
| NovNovember | 54°F(12°C) | 39°F(4°C) | 3.4 in(86 mm) | 65% | 2.0 |
| DecDecember | 44°F(7°C) | 31°F(-1°C) | 3.9 in(99 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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