Climate and monthly weather forecastSummit, NJ
Climate and monthly weather forecast
Weather in January
January, like December, in Summit, New Jersey, is a wintry winter month, with temperature in the range of an average high of 35.1°F (1.7°C) and an average low of 22.5°F (-5.3°C). Temperature readings reach their annual highs in January, averaging 35.1°F (1.7°C) and a minimum average of 22.5°F (-5.3°C). Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Summit, New Jersey, with an average temperature varying between 24.3°F (-4.3°C) and 38.3°F (3.5°C). The advent of February observes an average high-temperature of a still icy 38.3°F (3.5°C), nearly identical to January's 35.1°F (1.7°C). Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Summit, New Jersey, with an average temperature varying between 31.6°F (-0.2°C) and 46.4°F (8°C). March introduces a minor temperature shift, with average high-temperatures adjusting from February's wintry 38.3°F (3.5°C) to a frosty 46.4°F (8°C). Weather in March »Weather in April
April is a refreshing spring month in Summit, New Jersey, with temperature in the range of an average low of 41.9°F (5.5°C) and an average high of 58.5°F (14.7°C). The arrival of April brings a change in Summit's weather, with average high-temperatures moving from March's frosty 46.4°F (8°C) to a mild 58.5°F (14.7°C). Weather in April »Weather in May
May, the last month of the spring in Summit, is an agreeable month, with an average temperature varying between 51.4°F (10.8°C) and 69.1°F (20.6°C). May's onset brings a temperature rise, moving from a mild 58.5°F (14.7°C) in April to an agreeable 69.1°F (20.6°C). Weather in May »Weather in June
June, the first month of the summer in Summit, is a moderately hot month, with an average temperature ranging between min 59°F (15°C) and max 77.5°F (25.3°C). June introduces a marginal temperature uplift, with average high-temperatures adjusting from May's pleasant 69.1°F (20.6°C) to a moderately hot 77.5°F (25.3°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Summit, New Jersey, with an average temperature ranging between max 83.7°F (28.7°C) and min 65.7°F (18.7°C). July, with average temperatures reaching a high of 83.7°F (28.7°C) and a low of 65.7°F (18.7°C), is the warmest month. In July, the heat index is computed to be a tropical 91.4°F (33°C). Weather in July »Weather in August
August, the last month of the summer in Summit, is another warm month, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 64.2°F (17.9°C). August's presence records an average high-temperature of a still warm 81.9°F (27.7°C), closely mirroring July's climate. Weather in August »Weather in September
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). September brings a slight decrease in temperature, down from 81.9°F (27.7°C) in August to a still moderately hot 74.5°F (23.6°C). Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Summit, New Jersey, with an average temperature ranging between max 62.2°F (16.8°C) and min 47.5°F (8.6°C). The start of October involves a temperature drop, moving from a moderately hot 74.5°F (23.6°C) in September to a refreshing 62.2°F (16.8°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Summit, New Jersey, with an average temperature varying between 36.5°F (2.5°C) and 50.5°F (10.3°C). The move into November indicates a reduction in the average high-temperature, down from October's enjoyable 62.2°F (16.8°C) to a fresh 50.5°F (10.3°C). Weather in November »Weather in December
December, the first month of the winter in Summit, is also an icy month, with temperature in the range of an average high of 40.8°F (4.9°C) and an average low of 29.7°F (-1.3°C). Summit's progression into December includes a drop in the average high-temperature, from a cool 50.5°F (10.3°C) in November to a wintry 40.8°F (4.9°C). Weather in December »Updated: Jun 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The coldest temperatures occur during January, when averages reach a peak of 35.1°F (1.7°C) and a low of 22.5°F (-5.3°C).
In Summit, New Jersey, during the entire year, the rain falls for 164.2 days and collects up to 30.67" (779mm) of precipitation.
January through May, October through December are months with snowfall.
In Summit, during the entire year, snow falls for 26 days and aggregates up to 11.61" (295mm) of snow.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February and December, with an average relative humidity of 80%, are most humid months.
With an average of 4.6h of sunshine, February has the least sunshine of the year.
March is the month with the most snowfall. Snow falls for 5.5 days and accumulates 3.5" (89mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
April and August, with an average relative humidity of 74%, are the least humid months.
June through September are months without snowfall.
June has the longest days of the year in Summit, New Jersey, with an average of 15h and 0min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
Summit's warmest temperatures are experienced in July, with average high temperatures of 83.7°F (28.7°C) and lows of 65.7°F (18.7°C).
The month with the most rainfall is July, when the rain falls for 17.4 days and typically aggregates up to 3.27" (83mm) of precipitation.
July has the most sunshine of the year, with an average of 10.3h of sunshine.
The month with the least rainfall is September, when the rain falls for 13.5 days and typically collects 1.69" (43mm) of precipitation.
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Summit, NJ
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.1°F).
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure
Summit, NJ
- Average pressure in January:
30.07"Hg - Average pressure in February:
30.04"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Summit, NJ
- Average wind speed in January:
8.3mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.1mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.8mph - Average wind speed in October:
7mph - Average wind speed in November:
7.3mph - Average wind speed in December:
7.6mph
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
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are April and August (74%).
Average rainfall
Summit, NJ
- Average rainfall in January:
1.93" - Average rainfall in February:
2.17" - Average rainfall in March:
2.6" - Average rainfall in April:
2.4" - Average rainfall in May:
2.91" - Average rainfall in June:
2.64"
- Average rainfall in July:
3.27" - Average rainfall in August:
2.72" - Average rainfall in September:
1.69" - Average rainfall in October:
2.99" - Average rainfall in November:
2.32" - Average rainfall in December:
3.03"
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
- Average rainfall days in January:
8.8 days - Average rainfall days in February:
9.8 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
14.1 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
11.6 days
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
The month with the highest snowfall is March (3.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Summit, NJ
- Average snowfall days in January:
7.6 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
5.5 days - Average snowfall days in April:
0.6 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
4 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Summit, NJ
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 54min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 30min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days
Summit, NJ
- Average sunshine days in January:
16.9 days - Average sunshine days in February:
13.5 days - Average sunshine days in March:
13.1 days - Average sunshine days in April:
11.4 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
12.5 days - Average sunshine days in September:
14.2 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
18.3 days - Average sunshine days in December:
15.6 days
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
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Summit, NJ
The months with the most cloud cover are February and March (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility
Summit, NJ
The 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).
