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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Hackettstown, New Jersey, is an icy winter month, with an average temperature ranging between min 21°F (-6.1°C) and max 33.8°F (1°C). The month of January sees the lowest average temperatures, reaching 33.8°F (1°C) at the peak and 21°F (-6.1°C) at the low. Weather in January »
Weather in February
February, the last month of the winter in Hackettstown, is also an icy month, with an average temperature ranging between max 37.4°F (3°C) and min 22.5°F (-5.3°C). Hackettstown experiences an average high-temperature of a still cold 37.4°F (3°C) in February, subtly different from January's 33.8°F (1°C). Weather in February »
Weather in March
March, the first month of the spring in Hackettstown, is a chilly month, with an average temperature fluctuating between 45.5°F (7.5°C) and 30°F (-1.1°C). A slight uplift of average high-temperatures is noted in March, with temperatures adjusting from an icy 37.4°F (3°C) in February to a chilly 45.5°F (7.5°C). Weather in March »
Weather in April
April is a mild spring month in Hackettstown, New Jersey, with an average temperature varying between 40.1°F (4.5°C) and 57.9°F (14.4°C). April's onset brings a rise in the average high-temperature, moving from a frosty 45.5°F (7.5°C) in March to a mild 57.9°F (14.4°C). Weather in April »
Weather in May
May, the last month of the spring in Hackettstown, is a pleasant month, with an average temperature ranging between max 69.1°F (20.6°C) and min 50°F (10°C). The start of May brings a rise in the average high-temperature, moving from a moderate 57.9°F (14.4°C) in April to a pleasant 69.1°F (20.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Hackettstown, New Jersey, with temperature in the range of an average low of 56.8°F (13.8°C) and an average high of 77°F (25°C). As May gives way to June, the average high-temperature displays a slight ascent, adjusting from an agreeable 69.1°F (20.6°C) to a moderately hot 77°F (25°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Hackettstown, New Jersey, with an average temperature varying between 63°F (17.2°C) and 82.9°F (28.3°C). July, with its average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 63°F (17.2°C), holds the record as the warmest month. For July, the heat index is appraised at a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Hackettstown, is another warm month, with an average temperature varying between 61.3°F (16.3°C) and 81°F (27.2°C). August reports an average high-temperature of a still warm 81°F (27.2°C), slightly varied from July's 82.9°F (28.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Hackettstown, is also a moderately hot month, with an average temperature fluctuating between 55°F (12.8°C) and 74.3°F (23.5°C). A minor decrease in the average high-temperature is observed during September, shifting from 81°F (27.2°C) in August to a still warm 74.3°F (23.5°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Hackettstown, New Jersey, with temperature in the range of an average low of 45.7°F (7.6°C) and an average high of 61.7°F (16.5°C). Transition from September to October is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 74.3°F (23.5°C) to a comfortable 61.7°F (16.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Hackettstown, New Jersey, with an average temperature fluctuating between 49.1°F (9.5°C) and 34.9°F (1.6°C). As October transitions into November, Hackettstown sees a drop in the average high-temperature, transitioning from a comfortable 61.7°F (16.5°C) to a frosty 49.1°F (9.5°C). Weather in November »
Weather in December
December, the first month of the winter in Hackettstown, is also an icy month, with an average temperature fluctuating between 28.4°F (-2°C) and 40.1°F (4.5°C). During Hackettstown's transition into December, the average high-temperature lessens, moving from a frosty 49.1°F (9.5°C) in November to an icy 40.1°F (4.5°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Hackettstown?
Hackettstown's coldest month, January, generally records average temperatures ranging from a high of 33.8°F (1°C) to a low of 21°F (-6.1°C).
How much does it rain in Hackettstown?
Throughout the year, there are 106.9 rainfall days, and 9.84" (250mm) of precipitation is accumulated.
When does it snow in Hackettstown?
January through May, October through December are months with snowfall in Hackettstown, New Jersey.
How many days does it snow in Hackettstown?
In Hackettstown, New Jersey, during the entire year, snow falls for 21.7 days and aggregates up to 3.94" (100mm) of snow.
What is the most humid month in Hackettstown?
February, October and December, with an average relative humidity of 81%, are most humid months in Hackettstown.
When does it snow the most in Hackettstown?
February is the month with the most snowfall in Hackettstown, New Jersey. Snow falls for 6.5 days and accumulates 0.98" (25mm) of snow.
What is the month with the least sunshine in Hackettstown?
With an average of 4.5h of sunshine, February has the least sunshine of the year in Hackettstown.
When is Daylight Saving Time (DST) in Hackettstown?
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.
What is the least humid month in Hackettstown?
With an average relative humidity of 76%, April is the least humid month in Hackettstown.
When it does not snow in Hackettstown?
In Hackettstown, snow does not fall in June through September.
When are the longest days in Hackettstown?
The month with the longest days in Hackettstown, New Jersey, is June, with an average of 15h and 6min of daylight.
What is the month with the highest UV index in Hackettstown?
The months with the highest UV index in Hackettstown are June and July, with an average maximum UV index of 6.
What are the warmest months in Hackettstown?
Hackettstown's warmest temperatures are experienced in July, with average high temperatures of 82.9°F (28.3°C) and lows of 63°F (17.2°C).
What is the rainiest month in Hackettstown?
July is the month with the most rainfall. Rain falls for 11.8 days and accumulates 1.18" (30mm) of precipitation.
What month has the most sunshine in Hackettstown?
July has the most sunshine of the year, with an average of 10.3h of sunshine.
What is the driest month in Hackettstown?
September is the month with the least rainfall in Hackettstown. Rain falls for 7.7 days and accumulates 0.35" (9mm) of precipitation.
What is the month with the shortest days in Hackettstown?
The month with the shortest days in Hackettstown is December, with an average of 9h and 18min of daylight.
When is the lowest UV index in Hackettstown?
December is the month with the lowest UV index in Hackettstown, New Jersey, with an average maximum UV index of 1.
Average temperature
Hackettstown, NJ
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.8°F).
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure
Hackettstown, 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
Hackettstown, NJ
- Average wind speed in January:
7.8mph - Average wind speed in February:
7.8mph - Average wind speed in March:
8mph - Average wind speed in April:
7.7mph - Average wind speed in May:
6.2mph - 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:
5.5mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.8mph - Average wind speed in December:
7.3mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity
Hackettstown, NJ
The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Hackettstown, NJ
- Average rainfall in January:
0.63" - Average rainfall in February:
0.59" - Average rainfall in March:
0.71" - Average rainfall in April:
0.94" - Average rainfall in May:
1.02" - Average rainfall in June:
0.94"
- Average rainfall in July:
1.18" - Average rainfall in August:
0.94" - Average rainfall in September:
0.35" - Average rainfall in October:
0.98" - Average rainfall in November:
0.67" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is July (1.18").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days
Hackettstown, NJ
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
6.4 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
11 days - Average rainfall days in May:
12.2 days - Average rainfall days in June:
10.3 days
- Average rainfall days in July:
11.8 days - Average rainfall days in August:
10.3 days - Average rainfall days in September:
7.7 days - Average rainfall days in October:
9.1 days - Average rainfall days in November:
6.3 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is May (12.2 days).
The month with the least rainy days is January (5.9 days).
Average snowfall
Hackettstown, NJ
- Average snowfall in January:
0.91" - Average snowfall in February:
0.98" - Average snowfall in March:
0.83" - Average snowfall in April:
0.04" - Average snowfall in May:
0.28" - Average snowfall in June:
0"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Hackettstown, NJ
- Average snowfall days in January:
6.4 days - Average snowfall days in February:
6.5 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.7 days - Average snowfall days in May:
0.2 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:
3.2 days
The month with the highest number of snowfall days is February (6.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Hackettstown, NJ
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
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 5min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
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 30min).
Average sunshine days
Hackettstown, NJ
- Average sunshine days in January:
21.5 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
18.6 days - Average sunshine days in April:
16.8 days - Average sunshine days in May:
15.4 days - Average sunshine days in June:
17.2 days
- Average sunshine days in July:
15.8 days - Average sunshine days in August:
17.6 days - Average sunshine days in September:
20.5 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
21.2 days - Average sunshine days in December:
21.3 days
The month with the most sunshine days is January (21.5 days).
The month with the least sunshine days is May (15.4 days).
Average UV index
Hackettstown, NJ
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Hackettstown, NJ
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility
Hackettstown, NJ
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Hackettstown, New Jersey, USA
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