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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, like December, in Riverhead, New York, is an icy winter month, with temperature in the range of an average high of 38.7°F (3.7°C) and an average low of 30.6°F (-0.8°C). With average temperatures fluctuating between a high of 38.7°F (3.7°C) and a low of 30.6°F (-0.8°C), January stands out as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Riverhead, New York, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 39.7°F (4.3°C). Riverhead's shift into February sets the average high-temperature at a still icy 39.7°F (4.3°C), a figure that deviates only slightly from January's 38.7°F (3.7°C). Weather in February »
Weather in March
March, the first month of the spring in Riverhead, is a chilly month, with an average temperature fluctuating between 36.1°F (2.3°C) and 43.5°F (6.4°C). March's average high-temperature is a frosty 43.5°F (6.4°C), maintaining a close comparison with February's 39.7°F (4.3°C). Weather in March »
Weather in April
April is a cool spring month in Riverhead, New York, with an average temperature ranging between max 51.4°F (10.8°C) and min 44.4°F (6.9°C). With the onset of April, Riverhead's weather sees a minor temperature rise, transitioning from a frosty 43.5°F (6.4°C) in March to a fresh 51.4°F (10.8°C). Weather in April »
Weather in May
May, the last month of the spring in Riverhead, is a mild month, with an average temperature fluctuating between 60.4°F (15.8°C) and 53.2°F (11.8°C). May comes with an increase, with the average high-temperature moving from a fresh 51.4°F (10.8°C) in April to a moderate 60.4°F (15.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Riverhead, New York, with temperature in the range of an average low of 63°F (17.2°C) and an average high of 69.4°F (20.8°C). The arrival of June sees a shift in the average high-temperature, moving from a moderate 60.4°F (15.8°C) in May to an agreeable 69.4°F (20.8°C). Weather in June »
Weather in July
July in Riverhead, New York, is a warm summer month, with an average temperature varying between 76.8°F (24.9°C) and 70.9°F (21.6°C). July's onset witnesses a minor shift in the average high-temperature, moving from an agreeable 69.4°F (20.8°C) in June to a warm 76.8°F (24.9°C). Weather in July »
Weather in August
August, the last month of the summer in Riverhead, is also a moderately hot month, with temperature in the range of an average low of 71.2°F (21.8°C) and an average high of 77.5°F (25.3°C). August, having an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 71.2°F (21.8°C), is the warmest month. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Riverhead, New York, with an average temperature ranging between min 65.1°F (18.4°C) and max 71.2°F (21.8°C). September implies a soft temperature shift, with average high-temperatures reducing from August's warm 77.5°F (25.3°C) to a pleasant 71.2°F (21.8°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Riverhead, New York, with an average temperature varying between 62.2°F (16.8°C) and 55.6°F (13.1°C). October's arrival corresponds with a decrease in average high-temperatures, from September's agreeable 71.2°F (21.8°C) to an enjoyable 62.2°F (16.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Riverhead, New York, with an average temperature ranging between min 45.5°F (7.5°C) and max 52.5°F (11.4°C). The onset of November introduces a moderate change in Riverhead's weather, with average high-temperatures falling from October's comfortable 62.2°F (16.8°C) to a fresh 52.5°F (11.4°C). Weather in November »
Weather in December
December, the first month of the winter in Riverhead, is also a frosty month, with an average temperature varying between 44.4°F (6.9°C) and 37°F (2.8°C). December's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a cool 52.5°F (11.4°C) in November to a chilly 44.4°F (6.9°C). Weather in December »
Updated: Aug 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 is the coldest time of year?
Temperature readings reach their annual highs in January, averaging 38.7°F (3.7°C) and a minimum average of 30.6°F (-0.8°C).
How much does it rain?
In Riverhead, during the entire year, the rain falls for 154.3 days and collects up to 30" (762mm) of precipitation.
When does it snow?
Months with snowfall are January through March, May, November and December.
How many days does it snow?
Throughout the year, there are 18.6 snowfall days, and 4.45" (113mm) of snow is accumulated.
When is the lowest UV index in Riverhead?
The months with the lowest UV index are January through March and December, with an average maximum UV index of 2.
What is the month with the least sunshine in Riverhead?
With an average of 4.7h of sunshine, February has the least sunshine of the year in Riverhead.
What is the snowiest month?
The month with the most snowfall is March, when snow falls for 3.7 days and typically aggregates up to 1.54" (39mm) of snow.
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.
When it does not snow?
In Riverhead, snow does not fall in April, June through October.
What is the most humid month in Riverhead?
With an average relative humidity of 80%, May is the most humid month.
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?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the month with the most sunshine?
July and August, with an average of 10.7h of sunshine, are months with the most sunshine.
What are the warmest months?
August, with its average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 71.2°F (21.8°C), holds the record as the warmest month.
What is the driest month?
September is the month with the least rainfall. Rain falls for 12.3 days and accumulates 1.89" (48mm) of precipitation.
What is the least humid month?
November is the least humid month, with an average relative humidity of 71%.
What is the rainiest month?
December is the month with the most rainfall. Rain falls for 13.1 days and accumulates 3.27" (83mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 18min of daylight.
Average temperature
Riverhead, NY
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (38.7°F).
The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure
Riverhead, NY
- Average pressure in January:
30.04"Hg - Average pressure in February:
30.02"Hg - Average pressure in March:
30.04"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:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Riverhead, NY
- Average wind speed in January:
14.5mph - Average wind speed in February:
13.9mph - Average wind speed in March:
13.7mph - Average wind speed in April:
12.6mph - Average wind speed in May:
10.7mph - Average wind speed in June:
9.8mph
- Average wind speed in July:
9.5mph - Average wind speed in August:
9.6mph - Average wind speed in September:
11.2mph - Average wind speed in October:
13.2mph - Average wind speed in November:
13.9mph - Average wind speed in December:
14.2mph
The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest month (with the lowest average wind speed) is July (9.5mph).
Average humidity
Riverhead, NY
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is November (71%).
Average rainfall
Riverhead, NY
- Average rainfall in January:
1.97" - Average rainfall in February:
2.09" - Average rainfall in March:
2.64" - Average rainfall in April:
2.52" - Average rainfall in May:
2.4" - Average rainfall in June:
2.24"
- Average rainfall in July:
2.8" - Average rainfall in August:
2.64" - Average rainfall in September:
1.89" - Average rainfall in October:
3.11" - Average rainfall in November:
2.44" - Average rainfall in December:
3.27"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days
Riverhead, NY
- Average rainfall days in January:
9.8 days - Average rainfall days in February:
9 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
14.6 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
15.6 days - Average rainfall days in August:
14.7 days - Average rainfall days in September:
12.3 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
13.1 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is February (9 days).
Average snowfall
Riverhead, NY
The month with the highest snowfall is March (1.54").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days
Riverhead, NY
- Average snowfall days in January:
5.5 days - Average snowfall days in February:
5.4 days - Average snowfall days in March:
3.7 days - Average snowfall days in April:
0.3 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 days - Average snowfall days in November:
0.7 days - Average snowfall days in December:
2.9 days
The month with the highest number of snowfall days is January (5.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Riverhead, NY
- 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:
5h and 1min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 4min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 4min - Average sunshine in September:
9h and 0min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days
Riverhead, NY
- Average sunshine days in January:
15.5 days - Average sunshine days in February:
13.2 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
13.7 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
14.8 days
- Average sunshine days in July:
13.8 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
14.9 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
13.5 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is February (13.2 days).
Average UV index
Riverhead, NY
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 and December (UV index 2).
Average cloud cover
Riverhead, NY
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Riverhead, NY
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).
Riverhead, New York, USA
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