Climate and monthly weather forecastDelaware, NJ
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Delaware, New Jersey, with an average temperature fluctuating between 19.8°F (-6.8°C) and 32.5°F (0.3°C). The month of January, characterized by an average high of 32.5°F (0.3°C) and a low of 19.8°F (-6.8°C), is recognized as the coldest. Weather in January »Weather in February
The last month of the winter, February, is also an icy month in Delaware, New Jersey, with an average temperature ranging between min 21.6°F (-5.8°C) and max 36.3°F (2.4°C). At the start of February, Delaware's average high-temperature reaches a still cold 36.3°F (2.4°C), subtly different from the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Delaware, New Jersey, with an average temperature varying between 28.2°F (-2.1°C) and 44.1°F (6.7°C). The shift into March brings a slight increase in the average high-temperature, moving from an icy 36.3°F (2.4°C) in February to a frosty 44.1°F (6.7°C). Weather in March »Weather in April
April is a moderate spring month in Delaware, New Jersey, with temperature in the range of an average low of 38.5°F (3.6°C) and an average high of 56.1°F (13.4°C). April sees a rise in the average high-temperature, climbing from a frosty 44.1°F (6.7°C) in March to a refreshing 56.1°F (13.4°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Delaware, New Jersey, with an average temperature ranging between max 68.2°F (20.1°C) and min 48.7°F (9.3°C). May brings a temperature increase, with average high-temperatures moving from April's mild 56.1°F (13.4°C) to a pleasant 68.2°F (20.1°C). Weather in May »Weather in June
June, the first month of the summer in Delaware, is a moderately hot month, with an average temperature fluctuating between 76.5°F (24.7°C) and 55.6°F (13.1°C). Delaware in June observes a minor temperature shift, with average high-temperatures adjusting from a pleasant 68.2°F (20.1°C) in May to a warm 76.5°F (24.7°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Delaware, New Jersey, with an average temperature ranging between max 82.2°F (27.9°C) and min 61.2°F (16.2°C). Temperature records mark July as the warmest month, with highs averaging 82.2°F (27.9°C) and lows at 61.2°F (16.2°C). The heat index value during July is evaluated at a hot 87.8°F (31°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Delaware, New Jersey, with an average temperature varying between 80.2°F (26.8°C) and 59.4°F (15.2°C). August's average high-temperature is a still warm 80.2°F (26.8°C), maintaining a close comparison with July's 82.2°F (27.9°C). Weather in August »Weather in September
September, the first month of the autumn in Delaware, is still a warm month, with an average temperature ranging between min 53.2°F (11.8°C) and max 73.4°F (23°C). Delaware's progression into September involves a minor drop in the average high-temperature, slightly receding from 80.2°F (26.8°C) in August to a still moderately hot 73.4°F (23°C). Weather in September »Weather in October
October, the same as September, in Delaware, New Jersey, is another refreshing autumn month, with an average temperature varying between 44.2°F (6.8°C) and 60.3°F (15.7°C). Delaware's weather in October involves a decrease in the average high-temperature, moving down from September's warm 73.4°F (23°C) to a moderate 60.3°F (15.7°C). Weather in October »Weather in November
November, the last month of the autumn in Delaware, is another chilly month, with an average temperature varying between 33.4°F (0.8°C) and 47.8°F (8.8°C). The average high-temperature drops in November, from October's refreshing 60.3°F (15.7°C) to a frosty 47.8°F (8.8°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Delaware, New Jersey, with an average temperature ranging between min 26.8°F (-2.9°C) and max 38.3°F (3.5°C). Delaware's progression into December includes a drop in the average high-temperature, from a frosty 47.8°F (8.8°C) in November to a cold 38.3°F (3.5°C). Weather in December »Updated: Feb 13, 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
Delaware, New Jersey, witnesses the coldest weather in January, with temperatures averaging a high of 32.5°F (0.3°C) and a low of 19.8°F (-6.8°C).
Throughout the year, in Delaware, New Jersey, there are 165.9 rainfall days, and 31.61" (803mm) of precipitation is accumulated.
January through May, October through December are months with snowfall in Delaware, New Jersey.
In Delaware, during the entire year, snow falls for 42.7 days and aggregates up to 21.26" (540mm) of snow.
February, October and December, with an average relative humidity of 82%, are most humid months in Delaware, New Jersey.
The month with the most snowfall in Delaware is February, when snow falls for 11.1 days and typically aggregates up to 5.67" (144mm) of snow.
The month with the least sunshine is February, with an average of 4.3h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Delaware, 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 is the least humid month in Delaware, with an average relative humidity of 76%.
In Delaware, snow does not fall in June through September.
June has the longest days of the year in Delaware, New Jersey, with an average of 15h and 6min of daylight.
The month with the highest UV index in Delaware is June, with an average maximum UV index of 6.
Delaware experiences its highest temperatures in July, with an average peak of 82.2°F (27.9°C) and a low of 61.2°F (16.2°C).
July is the month with the most rainfall. Rain falls for 17.4 days and accumulates 3.11" (79mm) of precipitation.
With an average of 10.2h of sunshine, July has the most sunshine of the year.
September is the month with the least rainfall in Delaware. Rain falls for 11.5 days and accumulates 1.81" (46mm) of precipitation.
December has the shortest days of the year in Delaware, with an average of 9h and 18min of daylight.
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Delaware, NJ
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure
Delaware, 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:
30.03"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
Delaware, NJ
- Average wind speed in January:
7.8mph - Average wind speed in February:
7.8mph - Average wind speed in March:
7.8mph - Average wind speed in April:
7.5mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.9mph - Average wind speed in September:
5.4mph - Average wind speed in October:
6.4mph - Average wind speed in November:
6.8mph - Average wind speed in December:
7.1mph
The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity
Delaware, NJ
The months with the highest relative humidity are February, October and December (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Delaware, NJ
- Average rainfall in January:
2.24" - Average rainfall in February:
2.17" - Average rainfall in March:
2.68" - Average rainfall in April:
2.99" - Average rainfall in May:
3.03" - Average rainfall in June:
2.68"
- Average rainfall in July:
3.11" - Average rainfall in August:
2.6" - Average rainfall in September:
1.81" - Average rainfall in October:
2.99" - Average rainfall in November:
2.28" - Average rainfall in December:
3.03"
The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days
Delaware, NJ
- Average rainfall days in January:
9.6 days - Average rainfall days in February:
9.5 days - Average rainfall days in March:
13.8 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
15.6 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
11.4 days - Average rainfall days in December:
12.6 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (9.5 days).
Average snowfall
Delaware, NJ
- Average snowfall in January:
5.28" - Average snowfall in February:
5.67" - Average snowfall in March:
4.53" - Average snowfall in April:
0.39" - Average snowfall in May:
0.51" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.67").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Delaware, NJ
- Average snowfall days in January:
11.4 days - Average snowfall days in February:
11.1 days - Average snowfall days in March:
7.9 days - Average snowfall days in April:
1.9 days - Average snowfall days in May:
0.3 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:
0.4 days - Average snowfall days in November:
2.2 days - Average snowfall days in December:
7.5 days
The month with the highest number of snowfall days is January (11.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Delaware, NJ
- Average daylight in January:
9h and 36min - 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 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - 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 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 42min - Average sunshine in February:
4h and 18min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
9h and 54min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days
Delaware, NJ
- Average sunshine days in January:
15 days - Average sunshine days in February:
11.6 days - Average sunshine days in March:
12.3 days - Average sunshine days in April:
11.3 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
12.1 days - Average sunshine days in August:
13.3 days - Average sunshine days in September:
15.6 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
16.4 days - Average sunshine days in December:
14.5 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index
Delaware, NJ
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Delaware, NJ
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility
Delaware, NJ
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
