Weatheo

Smithtown Weather by Month

Average temperatures, rainfall and humidity for Smithtown, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Smithtown month looks like before you travel — then check the live Smithtown forecast for the days ahead.

Warmest month

July

28°C average high

Coolest month

January

-4°C average low

Wettest month

July

97 mm of rain

Driest month

February

48 mm of rain

Average temperature and rainfall in Smithtown by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January4°C-4°C-19°C / 18°C
58 mm
68%14 km/h
February5°C-3°C-20°C / 19°C
48 mm
69%14 km/h
March9°C1°C-15°C / 24°C
70 mm
64%15 km/h
April15°C6°C-6°C / 31°C
80 mm
66%15 km/h
May20°C11°C0°C / 34°C
92 mm
70%12 km/h
June25°C16°C6°C / 37°C
88 mm
72%11 km/h
July28°C20°C13°C / 37°C
97 mm
75%11 km/h
August27°C19°C10°C / 35°C
74 mm
74%11 km/h
September24°C15°C4°C / 33°C
79 mm
75%11 km/h
October18°C10°C-3°C / 30°C
95 mm
75%12 km/h
November12°C3°C-12°C / 26°C
62 mm
68%13 km/h
December7°C0°C-14°C / 19°C
88 mm
71%13 km/h

Best time to visit Smithtown

The most comfortable time to visit Smithtown is generally June and August to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around July, totalling about 930 mm a year.

Travellers who prefer heat should aim for July, when highs average 28°C. July is the month to avoid if rain would spoil your plans — it averages 97 mm, roughly 2× the rainfall of the driest month (February).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Smithtown forecast for what is happening now.

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