Climate and monthly weather forecastHillsdale, NJ
Climate and monthly weather forecast
Weather in January
January, like December, in Hillsdale, New Jersey, is a wintry winter month, with an average temperature varying between 22.8°F (-5.1°C) and 35.2°F (1.8°C). The month of January, characterized by an average high of 35.2°F (1.8°C) and a low of 22.8°F (-5.1°C), is recognized as the coldest. Weather in January »Weather in February
February, the last month of the winter in Hillsdale, is also an icy month, with an average temperature varying between 24.3°F (-4.3°C) and 38.3°F (3.5°C). The arrival of February brings an average high-temperature of a still wintry 38.3°F (3.5°C), nearly identical to January's 35.2°F (1.8°C). Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Hillsdale, New Jersey, with an average temperature ranging between min 32.2°F (0.1°C) and max 46.6°F (8.1°C). The transition from February to March brings a subtle temperature rise, with average high-temperatures increasing from a wintry 38.3°F (3.5°C) to a frosty 46.6°F (8.1°C). Weather in March »Weather in April
April in Hillsdale, New Jersey, is a refreshing spring month, with an average temperature fluctuating between 42.3°F (5.7°C) and 58.6°F (14.8°C). The shift into April is marked by a rise in the average high-temperature, moving from March's frosty 46.6°F (8.1°C) to a mild 58.6°F (14.8°C). Weather in April »Weather in May
May, the last month of the spring in Hillsdale, is an agreeable month, with an average temperature varying between 51.8°F (11°C) and 69.8°F (21°C). The arrival of May signals an increase in the average high-temperature, moving from a moderate 58.6°F (14.8°C) in April to a pleasant 69.8°F (21°C). Weather in May »Weather in June
June, the first month of the summer in Hillsdale, is a warm month, with an average temperature varying between 60.1°F (15.6°C) and 78.4°F (25.8°C). In Hillsdale, the average high-temperature in June slightly rises, from an agreeable 69.8°F (21°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 Hillsdale, New Jersey, with an average temperature ranging between min 66.6°F (19.2°C) and max 84.7°F (29.3°C). Hillsdale's temperatures peak on average in July, reaching 84.7°F (29.3°C) at their highest and 66.6°F (19.2°C) at their lowest. July's average heat index is appraised at a tropical 93.2°F (34°C). Weather in July »Weather in August
August, the last month of the summer in Hillsdale, is also a moderately hot month, with an average temperature fluctuating between 82.9°F (28.3°C) and 65.7°F (18.7°C). The onset of August marks an average high-temperature of a still warm 82.9°F (28.3°C), hardly differing from July's 84.7°F (29.3°C). Weather in August »Weather in September
September, the first month of the autumn in Hillsdale, is also a moderately hot month, with an average temperature ranging between max 75.2°F (24°C) and min 58.3°F (14.6°C). Hillsdale's weather subtly changes with the onset of September, barely falling from 82.9°F (28.3°C) in August to a still moderately hot 75.2°F (24°C). Weather in September »Weather in October
October, like September, in Hillsdale, New Jersey, is another enjoyable autumn month, with an average temperature ranging between min 48.4°F (9.1°C) and max 62.8°F (17.1°C). Observing a mild shift, the average high-temperature during October reduces from September's moderately hot 75.2°F (24°C) to a refreshing 62.8°F (17.1°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Hillsdale, New Jersey, with temperature in the range of an average high of 50.7°F (10.4°C) and an average low of 37°F (2.8°C). November's arrival corresponds with a decrease in average high-temperatures, from October's refreshing 62.8°F (17.1°C) to a fresh 50.7°F (10.4°C). Weather in November »Weather in December
December, the first month of the winter in Hillsdale, is still a cold month, with an average temperature varying between 30.4°F (-0.9°C) and 40.8°F (4.9°C). As December commences, the average high-temperature shows a reduction, transitioning from a fresh 50.7°F (10.4°C) in November to a cold 40.8°F (4.9°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
In Hillsdale, the lowest temperatures are generally noted in January, averaging a high of 35.2°F (1.8°C) and a low of 22.8°F (-5.1°C).
Throughout the year, in Hillsdale, New Jersey, there are 157.3 rainfall days, and 32.72" (831mm) of precipitation is accumulated.
January through April, October through December are months with snowfall in Hillsdale, New Jersey.
Throughout the year, in Hillsdale, New Jersey, there are 28 snowfall days, and 13.82" (351mm) of snow is accumulated.
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 78%, are most humid months.
The month with the most snowfall in Hillsdale is February, when snow falls for 7.9 days and typically aggregates up to 4.09" (104mm) of snow.
The month with the least sunshine in Hillsdale is February, with an average of 4.5h of sunshine.
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.
May through September are months without snowfall in Hillsdale, New Jersey.
June has the longest days of the year in Hillsdale, with an average of 15h and 6min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Hillsdale, New Jersey.
Hillsdale's warmest month, July, registers temperatures that range from a high of 84.7°F (29.3°C) to a low of 66.6°F (19.2°C).
With an average of 10.2h of sunshine, July has the most sunshine of the year in Hillsdale.
With an average relative humidity of 70%, August is the least humid month.
September is the month with the least rainfall in Hillsdale. Rain falls for 12.9 days and accumulates 1.89" (48mm) of precipitation.
December is the month with the most rainfall. Rain falls for 10.6 days and accumulates 3.58" (91mm) of precipitation.
December has the shortest days of the year in Hillsdale, New Jersey, with an average of 9h and 18min of daylight.
Average temperature
Hillsdale, NJ
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.2°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure
Hillsdale, NJ
- Average pressure in January:
30.06"Hg - Average pressure in February:
30.03"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:
29.98"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Hillsdale, NJ
- Average wind speed in January:
7.9mph - Average wind speed in February:
7.8mph - Average wind speed in March:
8mph - Average wind speed in April:
7.8mph - Average wind speed in May:
6.4mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.4mph - Average wind speed in September:
5.8mph - Average wind speed in October:
6.8mph - Average wind speed in November:
7.1mph - 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 (5.4mph).
Average humidity
Hillsdale, NJ
The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is August (70%).
Average rainfall
Hillsdale, NJ
- Average rainfall in January:
2.28" - Average rainfall in February:
2.2" - Average rainfall in March:
2.72" - Average rainfall in April:
2.8" - Average rainfall in May:
2.87" - Average rainfall in June:
2.83"
- Average rainfall in July:
3.15" - Average rainfall in August:
2.64" - Average rainfall in September:
1.89" - Average rainfall in October:
3.15" - Average rainfall in November:
2.6" - Average rainfall in December:
3.58"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days
Hillsdale, NJ
- Average rainfall days in January:
8.4 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
16.4 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
12.9 days - Average rainfall days in October:
13.1 days - Average rainfall days in November:
9.6 days - Average rainfall days in December:
10.6 days
The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is January (8.4 days).
Average snowfall
Hillsdale, NJ
The month with the highest snowfall is February (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Hillsdale, NJ
- Average snowfall days in January:
7.3 days - Average snowfall days in February:
7.9 days - Average snowfall days in March:
6.3 days - Average snowfall days in April:
0.8 days - Average snowfall days in May:
0 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:
1.1 days - Average snowfall days in December:
4.5 days
The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Hillsdale, 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 54min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 0min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 30min - 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 30min).
Average sunshine days
Hillsdale, NJ
- Average sunshine days in January:
17.6 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
12.6 days - Average sunshine days in June:
11.5 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
13.6 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
16.7 days - Average sunshine days in November:
18.7 days - Average sunshine days in December:
16.7 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (11.5 days).
Average UV index
Hillsdale, 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
Hillsdale, NJ
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility
Hillsdale, 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).
