Smithtown
New York, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Smithtown, NY

January, the same as December, is a wintry winter month in Smithtown, New York, with average temperature fluctuating between 37.6°F (3.1°C) and 28.9°F (-1.7°C). The coldest month is January, with an average high-temperature of 37.6°F (3.1°C) and an average low-temperature of 28.9°F (-1.7°C). Weather in January »

February, the last month of the winter, in Smithtown, is also a wintry month, with average temperature varying between 39°F (3.9°C) and 30.2°F (-1°C). In Smithtown, the average high-temperature in February is essentially the same as in January - a still cold 39°F (3.9°C). Weather in February »

March, the first month of the spring, in Smithtown, is a frosty month, with temperature in the range of an average high of 44.2°F (6.8°C) and an average low of 36.1°F (2.3°C). In March, the average high-temperature is practically the same as in February - a chilly 44.2°F (6.8°C). Weather in March »

April is a fresh spring month in Smithtown, New York, with average temperature ranging between min 45°F (7.2°C) and max 53.1°F (11.7°C). In Smithtown, the average high-temperature in April marginally rises, from a chilly 44.2°F (6.8°C) in March, to a fresh 53.1°F (11.7°C). Weather in April »

The last month of the spring, May, is a comfortable month in Smithtown, New York, with average temperature varying between 54°F (12.2°C) and 62.6°F (17°C). In May, the average high-temperature increases, from a cool 53.1°F (11.7°C) in April, to a comfortable 62.6°F (17°C). Weather in May »

June, the first month of the summer, in Smithtown, is an agreeable month, with average temperature fluctuating between 63.5°F (17.5°C) and 71.8°F (22.1°C). In Smithtown, the average high-temperature in June increases, from a comfortable 62.6°F (17°C) in May, to a pleasant 71.8°F (22.1°C). Weather in June »

July is a moderately hot summer month in Smithtown, New York, with average temperature varying between 79.3°F (26.3°C) and 71.2°F (21.8°C). With an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 71.2°F (21.8°C), July is the warmest month. Weather in July »

The last month of the summer, August, is also a moderately hot month in Smithtown, New York, with average temperature varying between 78.6°F (25.9°C) and 71.6°F (22°C). In August, the average high-temperature is relatively the same as in July - a still moderately hot 78.6°F (25.9°C). Weather in August »

The first month of the autumn, September, is still a pleasant month in Smithtown, New York, with average temperature ranging between min 64.8°F (18.2°C) and max 72.3°F (22.4°C). In Smithtown, the average high-temperature in September slightly decreases, from a moderately hot 78.6°F (25.9°C) in August, to a pleasant 72.3°F (22.4°C). Weather in September »

October, like September, in Smithtown, New York, is another enjoyable autumn month, with average temperature varying between 54.7°F (12.6°C) and 62.2°F (16.8°C). In Smithtown, New York, the average high-temperature drops, from a pleasant 72.3°F (22.4°C) in September, to a comfortable 62.2°F (16.8°C). Weather in October »

The last month of the autumn, November, is also a fresh month in Smithtown, New York, with average temperature ranging between max 51.4°F (10.8°C) and min 43.7°F (6.5°C). In November, the average high-temperature drops, from an enjoyable 62.2°F (16.8°C) in October, to a fresh 51.4°F (10.8°C). Weather in November »

The first month of the winter, December, is also a frosty month in Smithtown, New York, with average temperature fluctuating between 36°F (2.2°C) and 43.3°F (6.3°C). In Smithtown, the average high-temperature in December slightly decreases, from a cool 51.4°F (10.8°C) in November, to a frosty 43.3°F (6.3°C). Weather in December »

What is the coldest month in Smithtown?

January is the coldest month in Smithtown, New York, with an average high-temperature of 37.6°F (3.1°C) and an average low-temperature of 28.9°F (-1.7°C).

How many days does it rain in Smithtown?

In Smithtown, during the entire year, the rain falls for 155.9 days and collects up to 35.94" (913mm) of precipitation.

What is the driest month in Smithtown?

January is the month with the least rainfall. Rain falls for 7.8 days and accumulates 2.2" (56mm) of precipitation.

When does it snow in Smithtown?

January through March, November and December are months with snowfall in Smithtown.

How many days does it snow in Smithtown?

Throughout the year, in Smithtown, New York, there are 15.4 snowfall days, and 5.71" (145mm) of snow is accumulated.

What are the months with the lowest UV index in Smithtown?

Months with the lowest UV index are January through March and December, with an average maximum UV index of 2.

What is the month with the least sunshine in Smithtown?

With an average of 4.8h of sunshine, February has the least sunshine of the year in Smithtown, New York.

When does it snow the most in Smithtown?

March is the month with the most snowfall. Snow falls for 3.2 days and accumulates 1.85" (47mm) of snow.

When it does not snow in Smithtown?

April through October are months without snowfall.

What is the most humid month in Smithtown?

May is the most humid month, with an average relative humidity of 77%.

When are the longest days in Smithtown?

June has the longest days of the year, with an average of 15.1h of daylight.

What is the month with the highest UV index in Smithtown?

Months with the highest UV index in Smithtown, New York, are June through August, with an average maximum UV index of 6.

What is the warmest month in Smithtown?

With an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 71.2°F (21.8°C), July is the warmest month in Smithtown, New York.

What is the rainiest month in Smithtown?

The month with the most rainfall is July when the rain falls for 17.4 days and typically aggregates up to 3.94" (100mm) of precipitation.

What month has the most sunshine in Smithtown?

July has the most sunshine of the year in Smithtown, New York, with an average of 10.8h of sunshine.

What is the least humid month in Smithtown?

The least humid month in Smithtown is November, with an average relative humidity of 71%.

What is the month with the shortest days in Smithtown?

With an average of 9.3h of daylight, December has the shortest days of the year.
Average rainfall - Smithtown, NY
Average rainfall days - Smithtown, NY

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (7.8 days).

Average snowfall - Smithtown, NY

The month with the highest snowfall is March (47mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days - Smithtown, NY

The month with the highest number of snowfall days is February (4.8 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine - Smithtown, NY

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average UV index - Smithtown, NY