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Hourly Forecast
Daylight Hours
06:40
Sunrise
18:56
Sunset
Moon
Waxing Crescent
11:29
Moonrise
20:28
Moonset
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Weather in Syosset today, September 15, 2026
Sunshine leads the day in Syosset on September 15, 2026, with a patch of cloud building near 18:00. The broader outlook stays fair despite that temporary thickening. Expect a brighter morning, with limited cloud around 8% by 10:00. Conditions start on a settled note.
The temperature range runs from about 13°C up to 23°C. Relative humidity sits between 41% and 84%, reaching its peak around 23:00. Winds stay light, near 3.8 km/h by 06:00, so the day feels still more than breezy.
Expect a more open afternoon, with limited cloud around 34% by 18:00. Residual damp risk should be lower than earlier. Expect visibility around 16.1 km. Sunrise is at 06:40 and sunset at 18:56, giving 12 hours 15 minutes of sunlight today.
Taken together, settled sunshine in Syosset on September 15, 2026 makes outdoor timing easier, with highs near 23°C.
Frequently asked questions about weather in Syosset
How warm does it get in Syosset?
The warmest month in Syosset is July, with average high temperatures of 27°C. The average temperature during this period is around 25°C.
How cold does it get in Syosset?
The coldest month in Syosset is January, with average low temperatures of 0°C. The average temperature during this period is around 2°C.
What is the wettest time of year in Syosset?
The wettest month in Syosset is December, with an average of 128mm of precipitation.
What is the driest time of year in Syosset?
The driest month in Syosset is June, with an average of 78mm of precipitation.
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