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

Monthly weather forecast and climate
Islip, NY

January, the same as December, is a wintry winter month in Islip, New York, with average temperature ranging between min 23.4°F (-4.8°C) and max 37.9°F (3.3°C). January is the coldest month, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 23.4°F (-4.8°C). Weather in January »
February, the last month of the winter, in Islip, is another cold month, with average temperature varying between 25.2°F (-3.8°C) and 40.3°F (4.6°C). In Islip, the average high-temperature is almost the same as in January - a still wintry 40.3°F (4.6°C). Weather in February »

The first month of the spring, March, is a chilly month in Islip, New York, with average temperature ranging between min 31.3°F (-0.4°C) and max 47.3°F (8.5°C). In March, the average high-temperature slightly increases, from a wintry 40.3°F (4.6°C) in February, to a frosty 47.3°F (8.5°C). Weather in March »

April is a mild spring month in Islip, New York, with average temperature varying between 40.6°F (4.8°C) and 57.6°F (14.2°C). In Islip, the average high-temperature in April rises, from a frosty 47.3°F (8.5°C) in March, to a moderate 57.6°F (14.2°C). Weather in April »

The last month of the spring, May, is a comfortable month in Islip, New York, with average temperature fluctuating between 67.5°F (19.7°C) and 49.8°F (9.9°C). In May, the average high-temperature rises, from a mild 57.6°F (14.2°C) in April, to an enjoyable 67.5°F (19.7°C). Weather in May »

The first month of the summer, June, is a warm month in Islip, New York, with average temperature ranging between min 60.3°F (15.7°C) and max 76.6°F (24.8°C). In June, the average high-temperature increases, from a comfortable 67.5°F (19.7°C) in May, to a moderately hot 76.6°F (24.8°C). Weather in June »

July, the same as June, is another warm summer month in Islip, New York, with average temperature ranging between max 81.7°F (27.6°C) and min 66°F (18.9°C). July is the warmest month, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 66°F (18.9°C). Weather in July »

August, the last month of the summer, in Islip, is another warm month, with average temperature fluctuating between 65.3°F (18.5°C) and 80.4°F (26.9°C). In August, the average high-temperature is almost the same as in July - a still moderately hot 80.4°F (26.9°C). Weather in August »

The first month of the autumn, September, is also a moderately hot month in Islip, New York, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 73.8°F (23.2°C). In Islip, the average high-temperature marginally drops, from a moderately hot 80.4°F (26.9°C) in August, to a still warm 73.8°F (23.2°C). Weather in September »

October, the same as September, is another comfortable autumn month in Islip, New York, with average temperature varying between 63°F (17.2°C) and 45.5°F (7.5°C). In Islip, the average high-temperature drops, from a moderately hot 73.8°F (23.2°C) in September, to a comfortable 63°F (17.2°C). Weather in October »

The last month of the autumn, November, is another cool month in Islip, New York, with average temperature ranging between max 53.2°F (11.8°C) and min 37°F (2.8°C). In November, the average high-temperature drops, from an enjoyable 63°F (17.2°C) in October, to a fresh 53.2°F (11.8°C). Weather in November »

The first month of the winter, December, is also a frosty month in Islip, New York, with temperature in the range of an average low of 28.2°F (-2.1°C) and an average high of 43°F (6.1°C). In Islip, the average high-temperature in December drops, from a fresh 53.2°F (11.8°C) in November, to a frosty 43°F (6.1°C). Weather in December »

What is the coldest month in Islip?

The coldest month is January, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 23.4°F (-4.8°C).

How much does it rain in Islip?

In Islip, New York, during the entire year, the rain falls for 118.9 days and collects up to 46.2" (1174.5mm) of precipitation.

When does it snow in Islip?

January through April, November and December are months with snowfall.

How many days does it snow in Islip?

Throughout the year, there are 12.3 snowfall days, and 24.8" (629.9mm) of snow is accumulated.

What is the driest month in Islip?

The month with the least rainfall is February when the rain falls for 9.1 days and typically collects 3.3" (82.8mm) of precipitation.

When does it snow the most in Islip?

The month with the most snowfall in Islip, New York, is February when snow falls for 3.4 days and typically aggregates up to 7.1" (180.3mm) of snow.

When is the ocean coldest in Islip?

With an average ocean temperature of 39.7°F (4.3°C), February is the month with the coldest seawater in Islip, New York. For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

What is the rainiest month in Islip?

The month with the most rainfall in Islip is March when the rain falls for 10.5 days and typically aggregates up to 4.4" (112.8mm) of precipitation.

When are the longest days in Islip?

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

What is the warmest month in Islip?

The warmest month in Islip is July, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 66°F (18.9°C).

What month is the ocean warmest in Islip?

August is the month with the warmest seawater in Islip, New York, with an average ocean temperature of 73.9°F (23.3°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 73.9°F (23.3°C).

What is the month with the shortest days in Islip?

The month with the shortest days is December, with an average of 9.3h of daylight.
Average rainfall - Islip, NY
Average rainfall days - Islip, NY

The month with the highest number of rainy days is April (11.3 days).
Months with the lowest number of rainy days are August and October (8.5 days).

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

The month with the highest number of snowfall days is January (3.7 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature - Islip, NY

The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

Average daylight - Islip, NY

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