Islandia, NY
Climate overview — based on NOAA 1991-2020 normals from ISLIP LI MACARTHUR AP, NY US.
Year-round temperatures (°F)
Climate summary
Islandia has an annual average temperature of 53.1°F with about 46 inches of precipitation per year and 31.8 inches of snow. The warmest month is July (average high 82.8°F), and the coldest is January (average low 24.6°F). December is typically the wettest month (4.71 in) and July the driest (3.26 in). Snow typically falls from November through April.
Best time to visit Islandia
Full guide →Climate change signal
All-time records →96 of 366 (26.2%) of Islandia's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1960s | 26 | |
| 1970s | 47 | |
| 1980s | 35 | |
| 1990s | 79 | |
| 2000s | 51 | |
| 2010s | 72 | |
| 2020s | 56 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 39.2°F | 24.6°F | 31.9°F | 3.66 in | 10.3 in | 11 |
| February | 41.0°F | 25.5°F | 33.3°F | 3.29 in | 9.4 in | 10 |
| March | 47.7°F | 32.0°F | 39.9°F | 4.51 in | 6.5 in | 11 |
| April | 58.3°F | 41.2°F | 49.7°F | 4.06 in | 0.6 in | 11 |
| May | 68.3°F | 50.8°F | 59.5°F | 3.28 in | — | 12 |
| June | 77.2°F | 60.9°F | 69.0°F | 4.00 in | — | 10 |
| July | 82.8°F | 67.3°F | 75.0°F | 3.26 in | — | 9 |
| August | 81.4°F | 66.0°F | 73.7°F | 4.24 in | — | 9 |
| September | 74.8°F | 58.9°F | 66.9°F | 3.60 in | — | 9 |
| October | 64.1°F | 47.3°F | 55.7°F | 3.97 in | — | 9 |
| November | 53.6°F | 37.6°F | 45.6°F | 3.41 in | 0.5 in | 10 |
| December | 44.4°F | 29.8°F | 37.1°F | 4.71 in | 4.5 in | 12 |
Climate twins of Islandia
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).