Monthly weather forecast and climate
South Valley Stream, NY

January, like December, in South Valley Stream, New York, is another cold winter month, with average temperature varying between 37°F (2.8°C) and 28.2°F (-2.1°C). January is the coldest month, with an average high-temperature of 37°F (2.8°C) and an average low-temperature of 28.2°F (-2.1°C). Weather in January »

February, the last month of the winter, in South Valley Stream, is another cold month, with average temperature varying between 29.8°F (-1.2°C) and 39.4°F (4.1°C). In February, the average high-temperature is essentially the same as in January - a still wintry 39.4°F (4.1°C). Weather in February »

The first month of the spring, March, is a chilly month in South Valley Stream, New York, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 36°F (2.2°C). In March, the average high-temperature slightly increases, from a cold 39.4°F (4.1°C) in February, to a chilly 45.1°F (7.3°C). Weather in March »

April in South Valley Stream, New York, is a cool spring month, with average temperature ranging between min 45.1°F (7.3°C) and max 54.7°F (12.6°C). In April, the average high-temperature increases, from a chilly 45.1°F (7.3°C) in March, to a cool 54.7°F (12.6°C). Weather in April »

May, the last month of the spring, in South Valley Stream, is a comfortable month, with temperature in the range of an average low of 54.1°F (12.3°C) and an average high of 64.6°F (18.1°C). In South Valley Stream, the average high-temperature in May rises, from a cool 54.7°F (12.6°C) in April, to an enjoyable 64.6°F (18.1°C). Weather in May »

The first month of the summer, June, is a pleasant month in South Valley Stream, New York, with temperature in the range of an average high of 73.2°F (22.9°C) and an average low of 63.9°F (17.7°C). In South Valley Stream, the average high-temperature marginally rises, from a comfortable 64.6°F (18.1°C) in May, to a pleasant 73.2°F (22.9°C). Weather in June »

July is a moderately hot summer month in South Valley Stream, New York, with average temperature varying between 70.9°F (21.6°C) and 80.6°F (27°C). The warmest month is July, with an average high-temperature of 80.6°F (27°C) and an average low-temperature of 70.9°F (21.6°C). In July, the average heat index is evaluated at 84.7°F (29.3°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in South Valley Stream, New York, with average temperature varying between 79.9°F (26.6°C) and 71.1°F (21.7°C). In South Valley Stream, the average high-temperature in August is essentially the same as in July - a still warm 79.9°F (26.6°C). Weather in August »

September, the first month of the autumn, in South Valley Stream, is still a pleasant month, with average temperature varying between 73.2°F (22.9°C) and 64.2°F (17.9°C). In September, the average high-temperature marginally drops, from a moderately hot 79.9°F (26.6°C) in August, to a pleasant 73.2°F (22.9°C). Weather in September »

October, the same as September, is another comfortable autumn month in South Valley Stream, New York, with temperature in the range of an average high of 63°F (17.2°C) and an average low of 54.1°F (12.3°C). In South Valley Stream, the average high-temperature drops, from a pleasant 73.2°F (22.9°C) in September, to an enjoyable 63°F (17.2°C). Weather in October »

The last month of the autumn, November, is another cool month in South Valley Stream, New York, with average temperature varying between 42.6°F (5.9°C) and 51.6°F (10.9°C). In South Valley Stream, New York, the average high-temperature in November decreases, from an enjoyable 63°F (17.2°C) in October, to a fresh 51.6°F (10.9°C). Weather in November »

December, the first month of the winter, in South Valley Stream, is also a frosty month, with temperature in the range of an average low of 36°F (2.2°C) and an average high of 43.5°F (6.4°C). In South Valley Stream, the average high-temperature marginally drops, from a fresh 51.6°F (10.9°C) in November, to a frosty 43.5°F (6.4°C). Weather in December »

What is the coldest month in South Valley Stream?

The coldest month in South Valley Stream is January, with an average high-temperature of 37°F (2.8°C) and an average low-temperature of 28.2°F (-2.1°C).

How many days does it rain in South Valley Stream?

In South Valley Stream, New York, during the entire year, the rain falls for 135.3 days and collects up to 18.62" (473mm) of precipitation.

What is the driest month in South Valley Stream?

January is the month with the least rainfall in South Valley Stream. Rain falls for 7.3 days and accumulates 0.91" (23mm) of precipitation.

When does it snow in South Valley Stream?

January through March, October through December are months with snowfall.

How much does it snow in South Valley Stream?

In South Valley Stream, during the entire year, snow falls for 15.8 days, and aggregates up to 2.95" (75mm) of snow.

What is the month with the lowest UV index in South Valley Stream?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in South Valley Stream.

What is the month with the least sunshine in South Valley Stream?

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

When does it snow the most in South Valley Stream?

March is the month with the most snowfall. Snow falls for 3.3 days and accumulates 1.02" (26mm) of snow.

When it does not snow in South Valley Stream?

April through September are months without snowfall in South Valley Stream.

What is the most humid month in South Valley Stream?

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

When are the longest days in South Valley Stream?

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

When is the highest UV index in South Valley Stream?

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

What is the warmest month in South Valley Stream?

With an average high-temperature of 80.6°F (27°C) and an average low-temperature of 70.9°F (21.6°C), July is the warmest month.

What is the rainiest month in South Valley Stream?

The wettest months are July and August, with an average 2.32" (59mm) of rainfall.

What month has the most sunshine in South Valley Stream?

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

What is the least humid month in South Valley Stream?

The least humid month in South Valley Stream, New York, is November, with an average relative humidity of 72%.

What is the month with the shortest days in South Valley Stream?

The month with the shortest days is December, with an average of 9.3h of daylight.
Average temperature - South Valley Stream, NY
Average pressure - South Valley Stream, NY

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

Average wind speed - South Valley Stream, NY

The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8mph).

Average humidity - South Valley Stream, NY
Average rainfall - South Valley Stream, NY

The wettest months (with the highest rainfall) are July and August (2.32").
The driest month (with the least rainfall) is January (0.91").

Average rainfall days - South Valley Stream, NY

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (7.3 days).

Average snowfall - South Valley Stream, NY
Average snowfall days - South Valley Stream, NY

The month with the highest number of snowfall days is January (4.6 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine - South Valley Stream, 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 - South Valley Stream, NY

The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is July (13.6 days).

Average UV index - South Valley Stream, NY
Average visibility - South Valley Stream, 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).