Monthly weather forecast and climate
West Islip, NY

January, like December, in West Islip, New York, is a wintry winter month, with temperature in the range of an average high of 37.9°F (3.3°C) and an average low of 30.4°F (-0.9°C). With an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 30.4°F (-0.9°C), January is the coldest month. Weather in January »

February, the last month of the winter, in West Islip, is another cold month, with average temperature fluctuating between 39.7°F (4.3°C) and 31.1°F (-0.5°C). In West 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 West Islip, is a chilly month, with average temperature varying between 44.2°F (6.8°C) and 36.9°F (2.7°C). In March, the average high-temperature is almost the same as in February - a chilly 44.2°F (6.8°C). Weather in March »

April in West Islip, New York, is a fresh spring month, with average temperature varying between 45.1°F (7.3°C) and 52.9°F (11.6°C). In April, the average high-temperature marginally rises, 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 an enjoyable month in West Islip, New York, with average temperature varying between 62.2°F (16.8°C) and 54.7°F (12.6°C). In West Islip, the average high-temperature in May rises, 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 West Islip, New York, with average temperature ranging between max 71.2°F (21.8°C) and min 64°F (17.8°C). In West Islip, the average high-temperature in June rises, from an enjoyable 62.2°F (16.8°C) in May, to a pleasant 71.2°F (21.8°C). Weather in June »

July is a warm summer month in West Islip, New York, with temperature in the range of an average high of 79°F (26.1°C) and an average low of 72°F (22.2°C). July is the warmest month, with an average high-temperature of 79°F (26.1°C) and an average low-temperature of 72°F (22.2°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in West Islip, New York, with average temperature fluctuating between 72°F (22.2°C) and 78.4°F (25.8°C). In West Islip, 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 West Islip, is still a pleasant month, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 72.3°F (22.4°C). In September, the average high-temperature slightly decreases, from a moderately hot 78.4°F (25.8°C) in August, to an agreeable 72.3°F (22.4°C). Weather in September »

October, like September, in West Islip, New York, is another enjoyable autumn month, with average temperature varying between 55.8°F (13.2°C) and 62.4°F (16.9°C). In West Islip, the average high-temperature decreases, from an agreeable 72.3°F (22.4°C) in September, to a comfortable 62.4°F (16.9°C). Weather in October »

November, the last month of the autumn, in West Islip, is another cool month, with average temperature ranging between min 44.4°F (6.9°C) and max 52.2°F (11.2°C). In November, the average high-temperature decreases, from a comfortable 62.4°F (16.9°C) in October, to a cool 52.2°F (11.2°C). Weather in November »

The first month of the winter, December, is also a frosty month in West Islip, New York, with average temperature fluctuating between 44.1°F (6.7°C) and 36.9°F (2.7°C). In West Islip, the average high-temperature marginally drops, from a cool 52.2°F (11.2°C) in November, to a frosty 44.1°F (6.7°C). Weather in December »

What is the coldest month in West Islip?

January is the coldest month, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 30.4°F (-0.9°C).

How many days does it rain in West Islip?

Throughout the year, there are 157 rainfall days, and 35.98" (914mm) of precipitation is accumulated.

What is the driest month in West Islip?

The month with the least rainfall in West Islip is January when the rain falls for 8.1 days and typically collects 2.2" (56mm) of precipitation.

When does it snow in West Islip?

Months with snowfall are January through April, October through December.

How much does it snow in West Islip?

In West Islip, during the entire year, snow falls for 14.4 days, and aggregates up to 6.06" (154mm) of snow.

What are the months with the lowest UV index in West Islip?

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 West Islip?

With an average of 4.8h of sunshine, February has the least sunshine of the year.

What is the snowiest month in West Islip?

March is the month with the most snowfall in West Islip, New York. Snow falls for 3.1 days and accumulates 2.17" (55mm) of snow.

What is the most humid month in West Islip?

The most humid month in West Islip, New York, is May, with an average relative humidity of 78%.

When it does not snow in West Islip?

May through September are months without snowfall.

When are the longest days in West Islip?

June has the longest days of the year in West Islip, New York, with an average of 15.1h of daylight.

When is the highest UV index in West Islip?

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

What is the warmest month in West Islip?

With an average high-temperature of 79°F (26.1°C) and an average low-temperature of 72°F (22.2°C), July is the warmest month in West Islip, New York.

What is the rainiest month in West Islip?

The month with the most rainfall in West Islip, New York, is July when the rain falls for 17.3 days and typically aggregates up to 3.98" (101mm) of precipitation.

What month has the most sunshine in West Islip?

With an average of 10.8h of sunshine, July has the most sunshine of the year in West Islip.

What is the least humid month in West Islip?

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

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

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

The windiest month (with the highest average wind speed) is January (13.6mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).

Average rainfall - West Islip, NY
Average rainfall days - West Islip, NY

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.1 days).

Average snowfall - West Islip, NY
Average snowfall days - West 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 - West 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 - West Islip, NY

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is July (11.4 days).

Average UV index - West Islip, NY
Average visibility - West 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).