Monthly weather forecast and climate
Central Islip, NY

January, the same as December, is a wintry winter month in Central Islip, New York, with temperature in the range of an average high of 37.9°F (3.3°C) and an average low of 30°F (-1.1°C). The coldest month is January, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 30°F (-1.1°C). Weather in January »

February, the last month of the winter, in Central Islip, is also a wintry month, with average temperature ranging between max 39.7°F (4.3°C) and min 31.1°F (-0.5°C). In Central Islip, the average high-temperature is almost the same as in January - a still cold 39.7°F (4.3°C). Weather in February »

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

April in Central Islip, New York, is a fresh spring month, with average temperature fluctuating between 45.1°F (7.3°C) and 52.9°F (11.6°C). In Central Islip, the average high-temperature slightly increases, from a frosty 44.2°F (6.8°C) in March, to a cool 52.9°F (11.6°C). Weather in April »

The last month of the spring, May, is a comfortable month in Central Islip, New York, with temperature in the range of an average high of 62.2°F (16.8°C) and an average low of 54.5°F (12.5°C). In May, the average high-temperature increases, from a cool 52.9°F (11.6°C) in April, to a comfortable 62.2°F (16.8°C). Weather in May »

The first month of the summer, June, is an agreeable month in Central Islip, New York, with average temperature fluctuating between 63.9°F (17.7°C) and 71.4°F (21.9°C). In June, the average high-temperature increases, from a comfortable 62.2°F (16.8°C) in May, to an agreeable 71.4°F (21.9°C). Weather in June »

July is a warm summer month in Central Islip, New York, with average temperature ranging between min 71.8°F (22.1°C) and max 79°F (26.1°C). The warmest month is July, with an average high-temperature of 79°F (26.1°C) and an average low-temperature of 71.8°F (22.1°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in Central Islip, New York, with average temperature ranging between min 72°F (22.2°C) and max 78.4°F (25.8°C). In August, the average high-temperature is almost the same as in July - a still moderately hot 78.4°F (25.8°C). Weather in August »

September, the first month of the autumn, in Central Islip, is also an agreeable month, with average temperature ranging between max 72.1°F (22.3°C) and min 65.3°F (18.5°C). In Central Islip, the average high-temperature slightly decreases, from a warm 78.4°F (25.8°C) in August, to a pleasant 72.1°F (22.3°C). Weather in September »

October, like September, in Central Islip, New York, is another enjoyable autumn month, with temperature in the range of an average low of 55.8°F (13.2°C) and an average high of 62.4°F (16.9°C). In October, the average high-temperature decreases, from an agreeable 72.1°F (22.3°C) in September, to an enjoyable 62.4°F (16.9°C). Weather in October »

The last month of the autumn, November, is another cool month in Central Islip, New York, with temperature in the range of an average low of 44.2°F (6.8°C) and an average high of 52°F (11.1°C). In Central Islip, the average high-temperature drops, from a comfortable 62.4°F (16.9°C) in October, to a fresh 52°F (11.1°C). Weather in November »

The first month of the winter, December, is still a chilly month in Central Islip, New York, with average temperature fluctuating between 36.9°F (2.7°C) and 43.9°F (6.6°C). In Central Islip, the average high-temperature slightly decreases, from a cool 52°F (11.1°C) in November, to a chilly 43.9°F (6.6°C). Weather in December »

What is the coldest month in Central Islip?

The coldest month is January, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 30°F (-1.1°C).

How much does it rain in Central Islip?

In Central Islip, New York, during the entire year, the rain falls for 153.2 days and collects up to 34.45" (875mm) of precipitation.

What is the driest month in Central Islip?

January is the month with the least rainfall in Central Islip, New York. Rain falls for 7.6 days and accumulates 2.05" (52mm) of precipitation.

When does it snow in Central Islip?

Months with snowfall in Central Islip, New York, are January through March, October through December.

How much does it snow in Central Islip?

Throughout the year, in Central Islip, there are 13 snowfall days, and 5.87" (149mm) of snow is accumulated.

When is the lowest UV index in Central Islip?

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Central Islip.

What is the month with the least sunshine in Central Islip?

The month with the least sunshine in Central Islip is February, with an average of 4.8h of sunshine.

When does it snow the most in Central Islip?

March is the month with the most snowfall. Snow falls for 2.6 days and accumulates 1.97" (50mm) of snow.

When it does not snow in Central Islip?

April through September are months without snowfall.

What is the most humid month in Central Islip?

Months with the highest humidity in Central Islip, New York, are May and June, with an average relative humidity of 77%.

When are the longest days in Central Islip?

The month with the longest days in Central Islip is June, with an average of 15.1h of daylight.

What are the months with the highest UV index in Central Islip?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Central Islip.

What is the warmest month in Central Islip?

The warmest month is July, with an average high-temperature of 79°F (26.1°C) and an average low-temperature of 71.8°F (22.1°C).

What is the rainiest month in Central Islip?

July is the month with the most rainfall. Rain falls for 17.9 days and accumulates 3.86" (98mm) of precipitation.

What month has the most sunshine in Central Islip?

The month with the most sunshine in Central Islip, New York, is July, with an average of 10.8h of sunshine.

What is the least humid month in Central Islip?

November is the least humid month, with an average relative humidity of 71%.

What is the month with the shortest days in Central Islip?

With an average of 9.3h of daylight, December has the shortest days of the year in Central Islip, New York.
Average temperature - Central Islip, NY
Average pressure - Central Islip, NY

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

Average wind speed - Central Islip, NY

The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).

Average humidity - Central Islip, NY
Average rainfall - Central Islip, NY
Average rainfall days - Central Islip, NY

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.6 days).

Average snowfall - Central Islip, NY
Average snowfall days - Central Islip, NY

The month with the highest number of snowfall days is February (4.2 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine - Central Islip, 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 sunshine days - Central Islip, NY

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.2 days).

Average UV index - Central Islip, NY
Average visibility - Central Islip, NY

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).