Climate and monthly weather forecastRiverdale, NJ
Climate and monthly weather forecast
Weather in January
January, like December, in Riverdale, New Jersey, is a wintry winter month, with an average temperature ranging between max 35.8°F (2.1°C) and min 25°F (-3.9°C). Riverdale's temperature records reveal January as the coldest month, marked by average highs of 35.8°F (2.1°C) and lows of 25°F (-3.9°C). Weather in January »Weather in February
The last month of the winter, February, is also an icy month in Riverdale, New Jersey, with an average temperature fluctuating between 26.8°F (-2.9°C) and 38.8°F (3.8°C). Riverdale records an average high-temperature of a still icy 38.8°F (3.8°C) in February, closely mirroring the climate of the previous month. Weather in February »Weather in March
March, the first month of the spring in Riverdale, is a chilly month, with an average temperature varying between 33.6°F (0.9°C) and 46.2°F (7.9°C). The arrival of March signals a slight increase in the average high-temperature, moving from a wintry 38.8°F (3.8°C) in February to a chilly 46.2°F (7.9°C). Weather in March »Weather in April
April in Riverdale, New Jersey, is a refreshing spring month, with temperature in the range of an average low of 43.3°F (6.3°C) and an average high of 57.7°F (14.3°C). An increase in the average high-temperature marks April, moving from March's frosty 46.2°F (7.9°C) to a moderate 57.7°F (14.3°C). Weather in April »Weather in May
May, the last month of the spring in Riverdale, is an agreeable month, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 68.7°F (20.4°C). With the onset of May, Riverdale's average high-temperature sees a rise, moving from April's moderate 57.7°F (14.3°C) to a pleasant 68.7°F (20.4°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Riverdale, New Jersey, with an average temperature varying between 61.9°F (16.6°C) and 77.2°F (25.1°C). A slight uplift in the average high-temperature marks June, adjusting from May's agreeable 68.7°F (20.4°C) to a moderately hot 77.2°F (25.1°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Riverdale, New Jersey, with an average temperature varying between 68.7°F (20.4°C) and 84.2°F (29°C). The warmest time of the year is July, with temperatures averaging a high of 84.2°F (29°C) and a low of 68.7°F (20.4°C). For July, the heat index is appraised 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 Riverdale, New Jersey, with an average temperature fluctuating between 67.6°F (19.8°C) and 82.6°F (28.1°C). The commencement of August notes an average high-temperature of a still warm 82.6°F (28.1°C), exhibiting little difference from the previous month. Weather in August »Weather in September
September, the first month of the autumn in Riverdale, is still a warm month, with an average temperature varying between 75.2°F (24°C) and 60.8°F (16°C). A mild drop in Riverdale's average high-temperature is observed in September, transitioning from 82.6°F (28.1°C) in August to a still moderately hot 75.2°F (24°C). Weather in September »Weather in October
October, like September, in Riverdale, New Jersey, is another enjoyable autumn month, with an average temperature fluctuating between 50.7°F (10.4°C) and 63.1°F (17.3°C). The shift to October brings a decrease in the average high-temperature, falling from a warm 75.2°F (24°C) in September to a refreshing 63.1°F (17.3°C). Weather in October »Weather in November
November, the last month of the autumn in Riverdale, is also a fresh month, with an average temperature ranging between min 39.6°F (4.2°C) and max 50.9°F (10.5°C). Riverdale, New Jersey, experiences a temperature shift at the start of November, with average high-temperatures adjusting from an enjoyable 63.1°F (17.3°C) in October to a cool 50.9°F (10.5°C). Weather in November »Weather in December
December, the first month of the winter in Riverdale, is still a cold month, with an average temperature varying between 32.5°F (0.3°C) and 41.9°F (5.5°C). A subtle decrease in the average high-temperature marks December, falling from November's cool 50.9°F (10.5°C) to a wintry 41.9°F (5.5°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 Riverdale, January records the average lowest temperatures, peaking at 35.8°F (2.1°C) and reaching a low of 25°F (-3.9°C).
In Riverdale, during the entire year, the rain falls for 106.1 days and collects up to 8.31" (211mm) of precipitation.
Months with snowfall are January through April and December.
Throughout the year, in Riverdale, New Jersey, there are 12.2 snowfall days, and 1.18" (30mm) of snow is accumulated.
The months with the lowest UV index in Riverdale, New Jersey, are January through March, November and December, with an average maximum UV index of 2.
February and December, with an average relative humidity of 76%, are most humid months.
February has the least sunshine of the year in Riverdale, with an average of 4.7h 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 November are months without snowfall.
June has the longest days of the year, with an average of 15h and 6min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
July, characterized by an average high temperature of 84.2°F (29°C) and a low temperature of 68.7°F (20.4°C), is generally the warmest month.
July is the month with the most rainfall. Rain falls for 11.3 days and accumulates 0.98" (25mm) of precipitation.
The month with the most sunshine is July, with an average of 10.5h of sunshine.
The least humid month in Riverdale is August, with an average relative humidity of 69%.
September is the month with the least rainfall. Rain falls for 8.1 days and accumulates 0.39" (10mm) of precipitation.
The month with the most snowfall is December, when snow falls for 2.5 days and typically aggregates up to 0.35" (9mm) of snow.
December has the shortest days of the year in Riverdale, with an average of 9h and 18min of daylight.
Average temperature
Riverdale, NJ
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.8°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°F).
Average pressure
Riverdale, NJ
- Average pressure in January:
30.06"Hg - Average pressure in February:
30.03"Hg - Average pressure in March:
30.05"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:
30.1"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
Riverdale, NJ
- Average wind speed in January:
9mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.9mph - Average wind speed in April:
8.5mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6.2mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8mph - Average wind speed in November:
8.3mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity
Riverdale, NJ
The months with the highest relative humidity are February and December (76%).
The month with the lowest relative humidity is August (69%).
Average rainfall
Riverdale, NJ
- Average rainfall in January:
0.51" - Average rainfall in February:
0.47" - Average rainfall in March:
0.51" - Average rainfall in April:
0.71" - Average rainfall in May:
0.75" - Average rainfall in June:
0.83"
- Average rainfall in July:
0.98" - Average rainfall in August:
0.67" - Average rainfall in September:
0.39" - Average rainfall in October:
0.87" - Average rainfall in November:
0.79" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is July (0.98").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days
Riverdale, NJ
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
10.7 days - Average rainfall days in May:
11.4 days - Average rainfall days in June:
11.1 days
- Average rainfall days in July:
11.3 days - Average rainfall days in August:
10.8 days - Average rainfall days in September:
8.1 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
6.2 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is May (11.4 days).
The month with the least rainy days is January (5.4 days).
Average snowfall
Riverdale, NJ
The month with the highest snowfall is December (0.35").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days
Riverdale, NJ
- Average snowfall days in January:
3.3 days - Average snowfall days in February:
3.3 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.3 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 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
2.5 days
The months with the highest number of snowfall days are January and February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Riverdale, 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:
5h and 6min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 18min - Average sunshine in April:
8h and 18min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 24min - 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 48min
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
Riverdale, NJ
- Average sunshine days in January:
22.5 days - Average sunshine days in February:
18.9 days - Average sunshine days in March:
19.1 days - Average sunshine days in April:
17.4 days - Average sunshine days in May:
15.9 days - Average sunshine days in June:
15.9 days
- Average sunshine days in July:
16.4 days - Average sunshine days in August:
18.6 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
22 days - Average sunshine days in December:
21.1 days
The month with the most sunshine days is January (22.5 days).
The months with the least sunshine days are May and June (15.9 days).
Average UV index
Riverdale, 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
Riverdale, NJ
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Riverdale, 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).
