Ronkonkoma (NY) Weather & Climate: Best Time to Visit

In Ronkonkoma, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a comfortable 28°C (82°F) in July, the warmest time of the year, to a chilly 4°C (39°F) during cooler months like February.

At night, you can expect temperatures ranging from 20°C (68°F) in July to around -5°C (23°F) during February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Ronkonkoma experiences significant rain/snowfall throughout the year, averaging 1180 mm (46 in) of precipitation annually. While rainfall varies throughout the year, each season offers its own charm. December brings wetter days averaging 133 mm (5.2 in) of precipitation, spread over 12 rainy days.

In contrast, the driest month November experiences a drier climate, with about 79 mm (3.1 in) of rainfall spread across 10 rainy days. For more details, please visit our Ronkonkoma Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Ronkonkoma. While July receives considerable daily sunshine with up to 9.0 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.7 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Ronkonkoma.

The city experiences its highest humidity in September, reaching 68%. In April, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year