Climate and monthly weather forecastSouth River, NJ
Climate and monthly weather forecast
Weather in January
January, like December, in South River, New Jersey, is a wintry winter month, with temperature in the range of an average low of 25.7°F (-3.5°C) and an average high of 36.9°F (2.7°C). South River's coldest month, January, registers temperatures that range from a high of 36.9°F (2.7°C) to a low of 25.7°F (-3.5°C). Weather in January »Weather in February
The last month of the winter, February, is also an icy month in South River, New Jersey, with an average temperature varying between 27.1°F (-2.7°C) and 39.9°F (4.4°C). The advent of February reveals an average high-temperature of a still wintry 39.9°F (4.4°C), showing minimal difference from the prior month. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in South River, New Jersey, with an average temperature ranging between max 47.3°F (8.5°C) and min 34.3°F (1.3°C). March's arrival signals a subtle increase in average high-temperatures, moving from February's wintry 39.9°F (4.4°C) to a chilly 47.3°F (8.5°C). Weather in March »Weather in April
April is a moderate spring month in South River, New Jersey, with an average temperature fluctuating between 44.2°F (6.8°C) and 59°F (15°C). The arrival of April brings a change in South River's weather, with average high-temperatures moving from March's frosty 47.3°F (8.5°C) to a moderate 59°F (15°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in South River, New Jersey, with temperature in the range of an average low of 53.8°F (12.1°C) and an average high of 68.9°F (20.5°C). May sees a temperature increase, moving from a mild 59°F (15°C) in April to a pleasant 68.9°F (20.5°C). Weather in May »Weather in June
June, the first month of the summer in South River, is a warm month, with an average temperature ranging between max 77.2°F (25.1°C) and min 62.1°F (16.7°C). The start of June brings a subtle shift in the average high-temperature, edging up from May's pleasant 68.9°F (20.5°C) to a warm 77.2°F (25.1°C). Weather in June »Weather in July
July, like June, in South River, New Jersey, is a moderately hot summer month, with an average temperature fluctuating between 68.7°F (20.4°C) and 83.7°F (28.7°C). In South River, temperatures reach their average annual highs in July, measuring 83.7°F (28.7°C) and a minimum average of 68.7°F (20.4°C). The average heat index in July is evaluated at a tropical 91.4°F (33°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in South River, New Jersey, with an average temperature fluctuating between 67.6°F (19.8°C) and 82°F (27.8°C). August's beginning signals an average high-temperature of a still warm 82°F (27.8°C), barely different from July's 83.7°F (28.7°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in South River, New Jersey, with an average temperature ranging between max 75.4°F (24.1°C) and min 61.3°F (16.3°C). September witnesses a gentle descent in average high-temperature, descending from August's moderately hot 82°F (27.8°C) to a still warm 75.4°F (24.1°C). Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in South River, New Jersey, with an average temperature fluctuating between 63.7°F (17.6°C) and 50.7°F (10.4°C). In South River, the average high-temperature in October drops from a warm 75.4°F (24.1°C) in September to an enjoyable 63.7°F (17.6°C). Weather in October »Weather in November
November, the last month of the autumn in South River, is also a fresh month, with an average temperature varying between 52.2°F (11.2°C) and 39.6°F (4.2°C). With the onset of November, South River experiences a modest temperature adjustment, with the average high-temperature receding from a comfortable 63.7°F (17.6°C) in October to a cool 52.2°F (11.2°C). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in South River, New Jersey, with an average temperature varying between 43.3°F (6.3°C) and 32.7°F (0.4°C). South River's transition into December involves a gentle shift in temperature, receding from a fresh 52.2°F (11.2°C) in November to a frosty 43.3°F (6.3°C). Weather in December »Updated: Aug 19, 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
South River reaches its average lowest temperatures in January, measuring 36.9°F (2.7°C) at the peak and 25.7°F (-3.5°C) at the lowest.
In South River, New Jersey, during the entire year, the rain falls for 154 days and collects up to 30.75" (781mm) of precipitation.
Months with snowfall are January through April, November and December.
In South River, during the entire year, snow falls for 18.1 days and aggregates up to 8.35" (212mm) of snow.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
The months with the highest humidity are February, May, October and December, with an average relative humidity of 77%.
The month with the least sunshine is February, with an average of 4.7h of sunshine.
March is the month with the most snowfall in South River, New Jersey. Snow falls for 3.9 days and accumulates 3.82" (97mm) 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 months with the lowest humidity are April and August, with an average relative humidity of 73%.
In South River, snow does not fall in May through October.
May through August, with an average maximum UV index of 6, are months with the highest UV index.
June has the longest days of the year in South River, with an average of 15h and 0min of daylight.
July, with average temperatures reaching a high of 83.7°F (28.7°C) and a low of 68.7°F (20.4°C), is the warmest month.
The month with the most rainfall is July, when the rain falls for 17.4 days and typically aggregates up to 3.58" (91mm) of precipitation.
With an average of 10.5h of sunshine, July has the most sunshine of the year in South River.
September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 1.81" (46mm) of precipitation.
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
South River, NJ
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36.9°F).
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure
South River, 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:
29.98"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
South River, NJ
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.4mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.1mph - Average wind speed in May:
7.5mph - Average wind speed in June:
7mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
6.3mph - Average wind speed in September:
6.9mph - Average wind speed in October:
8.1mph - Average wind speed in November:
8.6mph - Average wind speed in December:
8.9mph
The windiest months (with the highest average wind speed) are January and March (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity
South River, NJ
The months with the highest relative humidity are February, May, October and December (77%).
The months with the lowest relative humidity are April and August (73%).
Average rainfall
South River, NJ
- Average rainfall in January:
1.85" - Average rainfall in February:
2.01" - Average rainfall in March:
2.72" - Average rainfall in April:
2.36" - Average rainfall in May:
2.95" - Average rainfall in June:
2.52"
- Average rainfall in July:
3.58" - Average rainfall in August:
3.19" - Average rainfall in September:
1.81" - Average rainfall in October:
2.48" - Average rainfall in November:
2.17" - Average rainfall in December:
3.11"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days
South River, NJ
- Average rainfall days in January:
8.5 days - Average rainfall days in February:
9 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
12.3 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
10.6 days
The month with the highest number of rainy days is July (17.4 days).
The months with the least rainy days are January and November (8.5 days).
Average snowfall
South River, NJ
The month with the highest snowfall is March (3.82").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
South River, NJ
- Average snowfall days in January:
5 days - Average snowfall days in February:
5.1 days - Average snowfall days in March:
3.9 days - Average snowfall days in April:
0.2 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:
0.7 days - Average snowfall days in December:
3.1 days
The month with the highest number of snowfall days is February (5.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
South River, 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:
9h and 54min - Average daylight in December:
9h and 18min
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 6min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 18min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 42min
- 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 36min - Average sunshine in December:
4h and 54min
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 42min).
Average sunshine days
South River, NJ
- Average sunshine days in January:
18.6 days - Average sunshine days in February:
15.4 days - Average sunshine days in March:
15.4 days - Average sunshine days in April:
14.1 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
10.5 days - Average sunshine days in August:
12.4 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
16.9 days - Average sunshine days in November:
20 days - Average sunshine days in December:
18 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (10.5 days).
Average UV index
South River, 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
South River, 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 31).
Average visibility
South River, 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).
