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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, the same as December, is an icy winter month in Hackettstown, New Jersey, with temperature in the range of an average high of 33.8°F (1°C) and an average low of 21°F (-6.1°C). January, having an average high-temperature of 33.8°F (1°C) and an average low-temperature of 21°F (-6.1°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Hackettstown, New Jersey, with an average temperature fluctuating between 37.4°F (3°C) and 22.5°F (-5.3°C). In Hackettstown, February's average high-temperature stands at a still icy 37.4°F (3°C), closely related to the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Hackettstown, is a chilly month, with an average temperature ranging between min 30°F (-1.1°C) and max 45.5°F (7.5°C). As March arrives, a slight rise in the average high-temperature is observed, moving from a cold 37.4°F (3°C) in February to a frosty 45.5°F (7.5°C). Weather in March »
Weather in April
April in Hackettstown, New Jersey, is a mild spring month, with an average temperature varying between 57.9°F (14.4°C) and 40.1°F (4.5°C). April indicates a change in the average high-temperature, moving up from a chilly 45.5°F (7.5°C) in March to a refreshing 57.9°F (14.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Hackettstown, New Jersey, with an average temperature varying between 50°F (10°C) and 69.1°F (20.6°C). With the onset of May, Hackettstown's average high-temperature sees a rise, moving from April's refreshing 57.9°F (14.4°C) to an agreeable 69.1°F (20.6°C). Weather in May »
Weather in June
June, the first month of the summer in Hackettstown, is a warm month, with an average temperature ranging between max 77°F (25°C) and min 56.8°F (13.8°C). June sees a marginal temperature increase, moving from an agreeable 69.1°F (20.6°C) in May to a moderately hot 77°F (25°C). Weather in June »
Weather in July
July, like June, in Hackettstown, New Jersey, is a moderately hot summer month, with temperature in the range of an average high of 82.9°F (28.3°C) and an average low of 63°F (17.2°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. The heat index value during July is calculated to be a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Hackettstown, is also a moderately hot month, with an average temperature fluctuating between 81°F (27.2°C) and 61.3°F (16.3°C). Hackettstown's weather in August displays an average high-temperature of a still warm 81°F (27.2°C), showing minor disparity from July's 82.9°F (28.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Hackettstown, New Jersey, with an average temperature ranging between min 55°F (12.8°C) and max 74.3°F (23.5°C). Hackettstown observes a small decrease in the average high-temperature with the arrival of September, falling from August's moderately hot 81°F (27.2°C) to a still warm 74.3°F (23.5°C). Weather in September »
Weather in October
October, like September, in Hackettstown, New Jersey, is another refreshing autumn month, with temperature in the range of an average high of 61.7°F (16.5°C) and an average low of 45.7°F (7.6°C). With October's onset, the average high-temperature recedes from September's moderately hot 74.3°F (23.5°C) to an enjoyable 61.7°F (16.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Hackettstown, New Jersey, with an average temperature varying between 34.9°F (1.6°C) and 49.1°F (9.5°C). November shows a mild decline in the average high-temperature, falling from October's 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 still a cold month, with an average temperature varying between 28.4°F (-2°C) and 40.1°F (4.5°C). A shift in the average high-temperature occurs in December, reducing from a chilly 49.1°F (9.5°C) in November to a cold 40.1°F (4.5°C). Weather in December »
Updated: Jul 22, 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
What part of the year is the coldest?
Hackettstown's coldest temperatures are experienced in January, with average high temperatures of 33.8°F (1°C) and lows of 21°F (-6.1°C).
How many days does it rain?
Throughout the year, in Hackettstown, New Jersey, there are 106.9 rainfall days, and 9.84" (250mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How much does it snow?
Throughout the year, there are 21.7 snowfall days, and 3.94" (100mm) of snow is accumulated.
What is the most humid month?
February, October and December, with an average relative humidity of 81%, are most humid months.
What is the snowiest month?
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?
With an average of 4.5h of sunshine, February has the least sunshine of the year in Hackettstown.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What are the months with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What part of the year is the hottest?
Hackettstown's temperatures peak on average in July, reaching 82.9°F (28.3°C) at their highest and 63°F (17.2°C) at their lowest.
What is the wettest month?
The month with the most rainfall in Hackettstown is July, when the rain falls for 11.8 days and typically aggregates up to 1.18" (30mm) of precipitation.
What month has the most sunshine?
With an average of 10.3h of sunshine, July has the most sunshine of the year.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 7.7 days and typically collects 0.35" (9mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
When is the lowest UV index?
With an average maximum UV index of 1, December is the month with the lowest UV index.
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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