Expand
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 a wintry winter month in Rock Mill, New Jersey, with an average temperature ranging between max 36.5°F (2.5°C) and min 23.5°F (-4.7°C). January is the coldest month, with the temperature often reaching an average high of 36.5°F (2.5°C) and an average low of 23.5°F (-4.7°C). Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Rock Mill, New Jersey, with temperature in the range of an average low of 26.1°F (-3.3°C) and an average high of 39.7°F (4.3°C). The transition into February shows a subtle variation to a still wintry 39.7°F (4.3°C) from January's 36.5°F (2.5°C) in the average high-temperature. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Rock Mill, New Jersey, with an average temperature fluctuating between 33.1°F (0.6°C) and 48°F (8.9°C). March witnesses a minor rise in the average high-temperature, transitioning from a cold 39.7°F (4.3°C) in February to a frosty 48°F (8.9°C). Weather in March »
Weather in April
April in Rock Mill, New Jersey, is a moderate spring month, with an average temperature ranging between max 60.3°F (15.7°C) and min 43.2°F (6.2°C). April sees a temperature increase, moving from a chilly 48°F (8.9°C) in March to a refreshing 60.3°F (15.7°C). Weather in April »
Weather in May
May, the last month of the spring in Rock Mill, is a pleasant month, with temperature in the range of an average low of 52.9°F (11.6°C) and an average high of 70.3°F (21.3°C). May's arrival coincides with a rise in the average high-temperature, moving from April's moderate 60.3°F (15.7°C) 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 Rock Mill, New Jersey, with temperature in the range of an average high of 78.3°F (25.7°C) and an average low of 60.1°F (15.6°C). Rock Mill's weather in June presents a minor rise in the average high-temperature, moving from an agreeable 70.3°F (21.3°C) in May to a warm 78.3°F (25.7°C). Weather in June »
Weather in July
July, like June, in Rock Mill, New Jersey, is another warm summer month, with temperature in the range of an average high of 84.6°F (29.2°C) and an average low of 66.7°F (19.3°C). July, with its average high-temperature of 84.6°F (29.2°C) and an average low-temperature of 66.7°F (19.3°C), holds the record as the warmest month. The heat index in July is calculated to be a tropical 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in Rock Mill, is also a moderately hot month, with an average temperature varying between 64.9°F (18.3°C) and 82.4°F (28°C). The arrival of August sees a recorded average high-temperature of a still moderately hot 82.4°F (28°C), showing little divergence from the previous month's conditions. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Rock Mill, New Jersey, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 75.7°F (24.3°C). The commencement of September indicates a gentle shift in the average high-temperature, receding from August's moderately hot 82.4°F (28°C) to a still warm 75.7°F (24.3°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Rock Mill, New Jersey, with an average temperature fluctuating between 48.4°F (9.1°C) and 63.9°F (17.7°C). Rock Mill's average high-temperature decreases in October, falling from a warm 75.7°F (24.3°C) in September to a comfortable 63.9°F (17.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Rock Mill, New Jersey, with an average temperature varying between 51.6°F (10.9°C) and 37.6°F (3.1°C). As November arrives, Rock Mill's weather displays a decrease in high-temperatures, transitioning from October's comfortable 63.9°F (17.7°C) to a fresh 51.6°F (10.9°C). Weather in November »
Weather in December
December, the first month of the winter in Rock Mill, is also a wintry month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 42.4°F (5.8°C). December's onset brings a reduction in the average high-temperature, from a cool 51.6°F (10.9°C) in November to a wintry 42.4°F (5.8°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
What are the coldest months in Rock Mill?
In Rock Mill, January is the coldest month, with temperatures averaging a high of 36.5°F (2.5°C) and a low of 23.5°F (-4.7°C).
How much does it rain in Rock Mill?
In Rock Mill, New Jersey, during the entire year, the rain falls for 107.3 days and collects up to 8.82" (224mm) of precipitation.
When does it snow in Rock Mill?
Months with snowfall are January through May, November and December.
How many days does it snow in Rock Mill?
In Rock Mill, New Jersey, during the entire year, snow falls for 15.5 days and aggregates up to 2.76" (70mm) of snow.
When is the lowest UV index in Rock Mill?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Rock Mill.
What are the most humid months in Rock Mill?
February and October, with an average relative humidity of 79%, are most humid months.
What is the month with the least sunshine in Rock Mill?
With an average of 4.7h of sunshine, February has the least sunshine of the year in Rock Mill, New Jersey.
What is the snowiest month in Rock Mill?
The month with the most snowfall is March, when snow falls for 3.7 days and typically aggregates up to 0.75" (19mm) of snow.
When is Daylight Saving Time (DST) in Rock Mill?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rock Mill, 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 Rock Mill?
April is the least humid month, with an average relative humidity of 74%.
What are the months with the highest UV index in Rock Mill?
The months with the highest UV index in Rock Mill are May through August, with an average maximum UV index of 6.
When it does not snow in Rock Mill?
June through October are months without snowfall.
When are the longest days in Rock Mill?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What is the hottest time of year in Rock Mill?
July proves to be the warmest month in Rock Mill, New Jersey, recording an average peak temperature of 84.6°F (29.2°C) and a minimum temperature of 66.7°F (19.3°C).
What is the rainiest month in Rock Mill?
July is the month with the most rainfall in Rock Mill. Rain falls for 12.9 days and accumulates 1.18" (30mm) of precipitation.
What month has the most sunshine in Rock Mill?
With an average of 10.6h of sunshine, July has the most sunshine of the year.
What is the driest month in Rock Mill?
September is the month with the least rainfall in Rock Mill. Rain falls for 8.5 days and accumulates 0.35" (9mm) of precipitation.
What is the month with the shortest days in Rock Mill?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Rock Mill, NJ
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (36.5°F).
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure
Rock Mill, NJ
- Average pressure in January:
30.08"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:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.09"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
Rock Mill, NJ
- Average wind speed in January:
8.4mph - Average wind speed in February:
8.4mph - Average wind speed in March:
8.6mph - Average wind speed in April:
8.4mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.8mph - Average wind speed in October:
7mph - Average wind speed in November:
7.4mph - Average wind speed in December:
7.8mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity
Rock Mill, NJ
The months with the highest relative humidity are February and October (79%).
The month with the lowest relative humidity is April (74%).
Average rainfall
Rock Mill, NJ
- Average rainfall in January:
0.47" - Average rainfall in February:
0.59" - Average rainfall in March:
0.75" - Average rainfall in April:
0.59" - Average rainfall in May:
0.83" - Average rainfall in June:
0.71"
- Average rainfall in July:
1.18" - Average rainfall in August:
1.02" - Average rainfall in September:
0.35" - Average rainfall in October:
0.67" - Average rainfall in November:
0.67" - Average rainfall in December:
0.98"
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
Rock Mill, NJ
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
6 days - Average rainfall days in March:
8.9 days - Average rainfall days in April:
9.3 days - Average rainfall days in May:
11 days - Average rainfall days in June:
11.6 days
- Average rainfall days in July:
12.9 days - Average rainfall days in August:
11.8 days - Average rainfall days in September:
8.5 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is November (5.5 days).
Average snowfall
Rock Mill, NJ
- Average snowfall in January:
0.47" - Average snowfall in February:
0.63" - Average snowfall in March:
0.75" - Average snowfall in April:
0.08" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is March (0.75").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Rock Mill, NJ
- Average snowfall days in January:
3.7 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
3.7 days - Average snowfall days in April:
0.4 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:
0.1 days - Average snowfall days in November:
0.7 days - Average snowfall days in December:
2.5 days
The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Rock Mill, 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - 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 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
5h and 1min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days
Rock Mill, NJ
- Average sunshine days in January:
22.3 days - Average sunshine days in February:
18.6 days - Average sunshine days in March:
18.4 days - Average sunshine days in April:
19 days - Average sunshine days in May:
16.3 days - Average sunshine days in June:
15.4 days
- Average sunshine days in July:
13.6 days - Average sunshine days in August:
16.4 days - Average sunshine days in September:
18.8 days - Average sunshine days in October:
20.7 days - Average sunshine days in November:
22.7 days - Average sunshine days in December:
21.2 days
The month with the most sunshine days is November (22.7 days).
The month with the least sunshine days is July (13.6 days).
Average UV index
Rock Mill, 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, March, November and December (UV index 2).
Average cloud cover
Rock Mill, NJ
The months with the most cloud cover are February and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility
Rock Mill, 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).
Rock Mill, New Jersey, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location