Point Forecast: Stony Brook NY
 40.92N 73.12W (Elev. 112 ft)
Last Update: 3:34 pm EDT Jul 21, 2026
Tabular Forecast
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Weather ElementsFire WeatherAviation Weather
Temperature (°F)
Dewpoint (°F)
Heat Index (°F)

Surface Wind  
Sky Cover (%)
Precipitation Potential (%)
Relative Humidity (%)

Rain
Thunder
Fog
Mixing Height  
Trans. Wind  
Vent Rate (x1000 mph-ft)
Atmospheric Dispersion Index
Ceiling Height
Visibility

48-Hour Period Starting:         

Date07/2307/24
Hour (EDT)161718192021222300010203040506070809101112131415
Temperature (°F)797979777573717069686867666667687072737577787979
Dewpoint (°F)545555565657575858585858585859596060605958585757
Heat Index (°F)79797977757577787979
Surface Wind (mph)786311122222333555556677
Wind DirSESSEEEEEEENENENENENENENENENENENEEEEE
Gust
Sky Cover (%)7323333332223346788911141616
Precipitation Potential (%)000000000000000000000000
Relative Humidity (%)424444485257616668707073757575737166645852504747
Rain------------------------------------------------
Thunder------------------------------------------------
Snow------------------------------------------------
Freezing Rain------------------------------------------------
Sleet------------------------------------------------
Fog------------------------------------------------

Date07/25
Hour (EDT)161718192021222300010203040506070809101112131415
Temperature (°F)797978777371696766666665656565666871747677787878
Dewpoint (°F)575758585959606060606060595960606161606060606060
Heat Index (°F)797978777677787878
Surface Wind (mph)777776532111123356789999
Wind DirEESESESESESESEEEEENENENENENENEEEEEEE
Gust
Sky Cover (%)151522283434343434344343434343433333333333333131
Precipitation Potential (%)000011111166666677777799
Relative Humidity (%)474750526266737881818184818184817871625856545454
Rain------------------------------------------------
Thunder------------------------------------------------
Snow------------------------------------------------
Freezing Rain------------------------------------------------
Sleet------------------------------------------------
Fog------------------------------------------------

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