Monthly weather forecast and climate
Summit, NJ

January, like December, in Summit, New Jersey, is a wintry winter month, with average temperature fluctuating between 35.1°F (1.7°C) and 22.5°F (-5.3°C). The coldest month is January, with an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 22.5°F (-5.3°C). Weather in January »

February, the last month of the winter, in Summit, is also a wintry month, with temperature in the range of an average low of 24.3°F (-4.3°C) and an average high of 38.3°F (3.5°C). In February, the average high-temperature is essentially the same as in January - a still wintry 38.3°F (3.5°C). Weather in February »

The first month of the spring, March, is a frosty month in Summit, New Jersey, with average temperature fluctuating between 46.4°F (8°C) and 31.6°F (-0.2°C). In March, the average high-temperature marginally rises, from a cold 38.3°F (3.5°C) in February, to a frosty 46.4°F (8°C). Weather in March »

April is a mild spring month in Summit, New Jersey, with average temperature fluctuating between 58.5°F (14.7°C) and 41.9°F (5.5°C). In Summit, the average high-temperature increases, from a chilly 46.4°F (8°C) in March, to a moderate 58.5°F (14.7°C). Weather in April »

The last month of the spring, May, is an agreeable month in Summit, New Jersey, with average temperature fluctuating between 69.1°F (20.6°C) and 51.4°F (10.8°C). In May, the average high-temperature increases, from a moderate 58.5°F (14.7°C) in April, to a pleasant 69.1°F (20.6°C). Weather in May »

June, the first month of the summer, in Summit, is a moderately hot month, with average temperature fluctuating between 59°F (15°C) and 77.5°F (25.3°C). In Summit, the average high-temperature marginally rises, from an agreeable 69.1°F (20.6°C) in May, to a warm 77.5°F (25.3°C). Weather in June »

July, like June, in Summit, New Jersey, is another warm summer month, with temperature in the range of an average high of 83.7°F (28.7°C) and an average low of 65.7°F (18.7°C). The warmest month is July, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 65.7°F (18.7°C). The average heat index is appraised at a tropical 91.4°F (33°C). Weather in July »

The last month of the summer, August, is another warm month in Summit, New Jersey, with average temperature varying between 64.2°F (17.9°C) and 81.9°F (27.7°C). In August, the average high-temperature is almost the same as in July - a still moderately hot 81.9°F (27.7°C). Weather in August »

September, the first month of the autumn, in Summit, is still a warm month, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 74.5°F (23.6°C). In September, the average high-temperature slightly decreases, from a moderately hot 81.9°F (27.7°C) in August, to a still warm 74.5°F (23.6°C). Weather in September »

October, the same as September, is another comfortable autumn month in Summit, New Jersey, with average temperature varying between 47.5°F (8.6°C) and 62.2°F (16.8°C). In Summit, the average high-temperature in October decreases, from a moderately hot 74.5°F (23.6°C) in September, to an enjoyable 62.2°F (16.8°C). Weather in October »

The last month of the autumn, November, is also a fresh month in Summit, New Jersey, with temperature in the range of an average high of 50.5°F (10.3°C) and an average low of 36.5°F (2.5°C). In Summit, the average high-temperature in November drops, from an enjoyable 62.2°F (16.8°C) in October, to a fresh 50.5°F (10.3°C). Weather in November »

The first month of the winter, December, is still a cold month in Summit, New Jersey, with average temperature varying between 40.8°F (4.9°C) and 29.7°F (-1.3°C). In December, the average high-temperature drops, from a fresh 50.5°F (10.3°C) in November, to a wintry 40.8°F (4.9°C). Weather in December »

What is the coldest month in Summit?

With an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 22.5°F (-5.3°C), January is the coldest month.

How many days does it rain in Summit?

In Summit, New Jersey, during the entire year, the rain falls for 164.2 days and collects up to 30.67" (779mm) of precipitation.

When does it snow in Summit?

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

How much does it snow in Summit?

Throughout the year, in Summit, New Jersey, there are 26 snowfall days, and 11.61" (295mm) of snow is accumulated.

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

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

What are the most humid months in Summit?

Months with the highest humidity in Summit are February and December, with an average relative humidity of 80%.

What is the month with the least sunshine in Summit?

February has the least sunshine of the year in Summit, New Jersey, with an average of 4.6h of sunshine.

What is the snowiest month in Summit?

March is the month with the most snowfall in Summit, New Jersey. Snow falls for 5.5 days and accumulates 3.5" (89mm) of snow.

What is the least humid month in Summit?

Months with the lowest humidity in Summit, New Jersey, are April and August, with an average relative humidity of 74%.

When it does not snow in Summit?

June through September are months without snowfall in Summit.

When are the longest days in Summit?

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

When is the highest UV index in Summit?

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

What is the warmest month in Summit?

With an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 65.7°F (18.7°C), July is the warmest month.

What is the wettest month in Summit?

The month with the most rainfall in Summit is July when the rain falls for 17.4 days and typically aggregates up to 3.27" (83mm) of precipitation.

What month has the most sunshine in Summit?

With an average of 10.3h of sunshine, July has the most sunshine of the year.

What is the driest month in Summit?

September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 1.69" (43mm) of precipitation.

What is the month with the shortest days in Summit?

With an average of 9.3h of daylight, December has the shortest days of the year in Summit, New Jersey.
Average temperature - Summit, NJ
Average pressure - Summit, NJ

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.93").

Average wind speed - Summit, NJ

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity - Summit, NJ
Average rainfall - Summit, NJ

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days - Summit, NJ

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (8.8 days).

Average snowfall - Summit, NJ
Average snowfall days - Summit, NJ

The month with the highest number of snowfall days is January (7.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Summit, NJ

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: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days - Summit, NJ

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.5 days).

Average UV index - Summit, NJ
Average visibility - Summit, NJ

Months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).