WeatherWX.com
Shelter Island Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 38°F Lo 32°F | Hi 39°F Lo 32°F | Hi 43°F Lo 36°F | Hi 50°F Lo 44°F | Hi 59°F Lo 53°F | Hi 68°F Lo 63°F | Hi 76°F Lo 71°F | Hi 77°F Lo 71°F | Hi 71°F Lo 66°F | Hi 62°F Lo 57°F | Hi 53°F Lo 46°F | Hi 45°F Lo 38°F |
| 16 mph | 15 mph | 15 mph | 14 mph | 12 mph | 11 mph | 10 mph | 11 mph | 12 mph | 15 mph | 16 mph | 16 mph |
| 5.2 in | 5.6 in | 6.3 in | 5.3 in | 5.8 in | 5.2 in | 6.5 in | 6.1 in | 4.7 in | 6.8 in | 4.6 in | 6.3 in |
| 73% | 74% | 73% | 76% | 80% | 80% | 79% | 76% | 75% | 73% | 71% | 73% |
| 48% | 50% | 47% | 45% | 43% | 34% | 29% | 27% | 32% | 41% | 39% | 51% |
| 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 19 | 15 | 20 | 22 | 24 | 23 | 25 | 25 | 25 | 25 | 23 | 21 |
| 6 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 5 | 6 | 6 | 8 |
| 6 | 7 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 2 | 2 | 3 | 5 | 6 | 6 | 6 | 5 | 4 | 2 | 2 |
| 168 | 145 | 171 | 175 | 202 | 230 | 264 | 269 | 234 | 198 | 195 | 153 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 3°C Lo -0°C | Hi 4°C Lo -0°C | Hi 6°C Lo 3°C | Hi 10°C Lo 7°C | Hi 15°C Lo 12°C | Hi 20°C Lo 17°C | Hi 24°C Lo 21°C | Hi 25°C Lo 22°C | Hi 22°C Lo 19°C | Hi 17°C Lo 14°C | Hi 12°C Lo 8°C | Hi 7°C Lo 4°C |
| 25 km/h | 24 km/h | 24 km/h | 22 km/h | 19 km/h | 18 km/h | 17 km/h | 17 km/h | 20 km/h | 24 km/h | 25 km/h | 26 km/h |
| 131 mm | 143 mm | 161 mm | 135 mm | 148 mm | 132 mm | 166 mm | 154 mm | 118 mm | 172 mm | 116 mm | 160 mm |
| 73% | 74% | 73% | 76% | 80% | 80% | 79% | 76% | 75% | 73% | 71% | 73% |
| 48% | 50% | 47% | 45% | 43% | 34% | 29% | 27% | 32% | 41% | 39% | 51% |
| 1017 mb | 1017 mb | 1017 mb | 1015 mb | 1017 mb | 1014 mb | 1014 mb | 1015 mb | 1017 mb | 1017 mb | 1019 mb | 1018 mb |
| 19 | 15 | 20 | 22 | 24 | 23 | 25 | 25 | 25 | 25 | 23 | 21 |
| 6 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 5 | 6 | 6 | 8 |
| 6 | 7 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 2 | 2 | 3 | 5 | 6 | 6 | 6 | 5 | 4 | 2 | 2 |
| 168 | 145 | 171 | 175 | 202 | 230 | 264 | 269 | 234 | 198 | 195 | 153 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.
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