Climate and monthly weather forecastAllentown, NJ
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Allentown, New Jersey, with an average temperature varying between 37.4°F (3°C) and 25°F (-3.9°C). January is the coldest month, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 25°F (-3.9°C). Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Allentown, New Jersey, with an average temperature ranging between min 27°F (-2.8°C) and max 41.2°F (5.1°C). Stepping into February, Allentown records an average high-temperature of a still cold 41.2°F (5.1°C), almost consistent with January. Weather in February »Weather in March
March, the first month of the spring in Allentown, is a chilly month, with temperature in the range of an average low of 34.2°F (1.2°C) and an average high of 48.7°F (9.3°C). A soft shift in the average high-temperature is noticeable in March, transitioning from an icy 41.2°F (5.1°C) in February to a chilly 48.7°F (9.3°C). Weather in March »Weather in April
April is a moderate spring month in Allentown, New Jersey, with an average temperature ranging between max 60.4°F (15.8°C) and min 43.9°F (6.6°C). April's arrival signals an increase in average high-temperatures, moving from March's frosty 48.7°F (9.3°C) to a moderate 60.4°F (15.8°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Allentown, New Jersey, with an average temperature varying between 53.4°F (11.9°C) and 70.3°F (21.3°C). Allentown's transition into May is marked by a temperature shift, moving from a mild 60.4°F (15.8°C) in April to an agreeable 70.3°F (21.3°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Allentown, New Jersey, with an average temperature ranging between min 61.3°F (16.3°C) and max 78.4°F (25.8°C). June's onset witnesses a minor shift in the average high-temperature, moving from a pleasant 70.3°F (21.3°C) in May to a warm 78.4°F (25.8°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Allentown, New Jersey, with an average temperature fluctuating between 67.6°F (19.8°C) and 84.4°F (29.1°C). The warmest month is July, with an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 67.6°F (19.8°C). In July, the average heat index is evaluated at a hot 93.2°F (34°C). Weather in July »Weather in August
August, the last month of the summer in Allentown, is also a moderately hot month, with an average temperature varying between 82.6°F (28.1°C) and 66.2°F (19°C). On the advent of August, Allentown's average high-temperature exhibits a minor adjustment to a still moderately hot 82.6°F (28.1°C) from July's 84.4°F (29.1°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Allentown, New Jersey, with an average temperature ranging between max 75.9°F (24.4°C) and min 59.9°F (15.5°C). A mild shift in the average high-temperature occurs in September, reducing from 82.6°F (28.1°C) in August to a still warm 75.9°F (24.4°C). Weather in September »Weather in October
October, like September, in Allentown, New Jersey, is another enjoyable autumn month, with an average temperature varying between 64.4°F (18°C) and 50°F (10°C). In October, the average high-temperature goes from a warm 75.9°F (24.4°C) in September to a comfortable 64.4°F (18°C). Weather in October »Weather in November
November, the last month of the autumn in Allentown, is also a fresh month, with an average temperature varying between 38.8°F (3.8°C) and 52.7°F (11.5°C). Allentown's November weather features a mild decline in high-temperatures, reducing from a comfortable 64.4°F (18°C) in October to a cool 52.7°F (11.5°C). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in Allentown, New Jersey, with an average temperature fluctuating between 43.7°F (6.5°C) and 32.2°F (0.1°C). December involves a decrease in temperature, down from a cool 52.7°F (11.5°C) in November to a chilly 43.7°F (6.5°C). Weather in December »Updated: Aug 1, 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 period is January, when temperatures fluctuate between an average high of 37.4°F (3°C) and a low of 25°F (-3.9°C).
Throughout the year, there are 152.9 rainfall days, and 28.78" (731mm) of precipitation is accumulated.
January through May, November and December are months with snowfall.
Throughout the year, there are 17.7 snowfall days, and 8.43" (214mm) of snow is accumulated.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February has the least sunshine of the year, with an average of 4.8h of sunshine.
The month with the most snowfall is March, when snow falls for 3.6 days and typically aggregates up to 3.11" (79mm) 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.
The least humid month in Allentown is April, with an average relative humidity of 73%.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
In Allentown, snow does not fall in June through October.
The month with the longest days is June, with an average of 15h and 0min of daylight.
July, with its average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 67.6°F (19.8°C), holds the record as the warmest month.
July is the month with the most rainfall. Rain falls for 17.8 days and accumulates 3.39" (86mm) of precipitation.
With an average of 10.5h of sunshine, July has the most sunshine of the year.
September is the month with the least rainfall. Rain falls for 12.7 days and accumulates 1.65" (42mm) of precipitation.
October is the most humid month, with an average relative humidity of 79%.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Allentown, NJ
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (37.4°F).
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure
Allentown, NJ
- Average pressure in January:
30.07"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.99"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:
29.98"Hg - Average pressure in September:
30.05"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
Allentown, NJ
- Average wind speed in January:
8.5mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.8mph - Average wind speed in April:
8.6mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6.1mph - Average wind speed in October:
7.3mph - Average wind speed in November:
7.6mph - Average wind speed in December:
7.9mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity
Allentown, NJ
The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall
Allentown, NJ
- Average rainfall in January:
1.73" - Average rainfall in February:
2.01" - Average rainfall in March:
2.6" - Average rainfall in April:
2.2" - Average rainfall in May:
2.68" - Average rainfall in June:
2.24"
- Average rainfall in July:
3.39" - Average rainfall in August:
3.15" - Average rainfall in September:
1.65" - Average rainfall in October:
2.17" - Average rainfall in November:
2.05" - Average rainfall in December:
2.91"
The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days
Allentown, NJ
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
9.2 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
15.6 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
11.3 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.3 days).
Average snowfall
Allentown, NJ
- Average snowfall in January:
1.89" - Average snowfall in February:
1.73" - Average snowfall in March:
3.11" - Average snowfall in April:
0.08" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is March (3.11").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Allentown, NJ
- Average snowfall days in January:
5.3 days - Average snowfall days in February:
4.9 days - Average snowfall days in March:
3.6 days - Average snowfall days in April:
0.3 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 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
3 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Allentown, 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 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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 24min).
- Average sunshine in January:
5h and 6min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 48min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 30min - Average sunshine in December:
5h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days
Allentown, NJ
- Average sunshine days in January:
19.1 days - Average sunshine days in February:
15 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
12 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
11 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
17.9 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
19.1 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11 days).
Average UV index
Allentown, NJ
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Allentown, NJ
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Allentown, NJ
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
