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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 sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Stony Brook, New York, is a wintry winter month, with temperature in the range of an average low of 29.1°F (-1.6°C) and an average high of 37.6°F (3.1°C). Stony Brook's coldest month, January, generally records average temperatures ranging from a high of 37.6°F (3.1°C) to a low of 29.1°F (-1.6°C). Weather in January »
Weather in February
The last month of the winter, February, is also an icy month in Stony Brook, New York, with an average temperature fluctuating between 38.8°F (3.8°C) and 30.4°F (-0.9°C). The transition into February is marked with an average high-temperature of a still cold 38.8°F (3.8°C), showing an insignificant shift from January's 37.6°F (3.1°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Stony Brook, New York, with an average temperature ranging between min 36°F (2.2°C) and max 43.9°F (6.6°C). The arrival of March is marked by an average high-temperature of a frosty 43.9°F (6.6°C), bearing a close resemblance to February. Weather in March »
Weather in April
April is a cool spring month in Stony Brook, New York, with temperature in the range of an average high of 52.9°F (11.6°C) and an average low of 44.6°F (7°C). An escalation in the average high-temperature is seen with the onset of April, moving from a frosty 43.9°F (6.6°C) in March to a fresh 52.9°F (11.6°C). Weather in April »
Weather in May
May, the last month of the spring in Stony Brook, is a refreshing month, with an average temperature ranging between max 62.6°F (17°C) and min 53.6°F (12°C). Observing a rise in May, the average high-temperature goes from April's fresh 52.9°F (11.6°C) to a refreshing 62.6°F (17°C). Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Stony Brook, New York, with an average temperature varying between 63.1°F (17.3°C) and 71.2°F (21.8°C). June brings a slight rise in Stony Brook's average high-temperature, moving from a comfortable 62.6°F (17°C) in May to a pleasant 71.2°F (21.8°C). Weather in June »
Weather in July
July in Stony Brook, New York, is a moderately hot summer month, with an average temperature fluctuating between 71.1°F (21.7°C) and 79.2°F (26.2°C). The temperatures reach their highest averages in July, with highs of 79.2°F (26.2°C) and lows of 71.1°F (21.7°C). Weather in July »
Weather in August
August, the last month of the summer in Stony Brook, is another warm month, with an average temperature varying between 78.4°F (25.8°C) and 71.1°F (21.7°C). The transition into August reveals an average high-temperature of a still warm 78.4°F (25.8°C), mirroring a close resemblance to July. Weather in August »
Weather in September
September, the first month of the autumn in Stony Brook, is also an agreeable month, with an average temperature ranging between max 72.3°F (22.4°C) and min 64.8°F (18.2°C). September sees a slight reduction in average high-temperature, with a shift from a warm 78.4°F (25.8°C) in August to a pleasant 72.3°F (22.4°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Stony Brook, New York, with an average temperature fluctuating between 55.4°F (13°C) and 62.6°F (17°C). Stony Brook in October demonstrates a small temperature transition, adjusting from an average high of an agreeable 72.3°F (22.4°C) in September to a comfortable 62.6°F (17°C). Weather in October »
Weather in November
November, the last month of the autumn in Stony Brook, is also a fresh month, with an average temperature ranging between min 44.1°F (6.7°C) and max 51.8°F (11°C). The transition into November is accompanied by a temperature decrease, with the average high-temperature shifting from a comfortable 62.6°F (17°C) in October to a fresh 51.8°F (11°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Stony Brook, New York, with an average temperature ranging between min 36.5°F (2.5°C) and max 43.7°F (6.5°C). December signals a slight drop in average high-temperature, sliding from November's cool 51.8°F (11°C) to a frosty 43.7°F (6.5°C). Weather in December »
Updated: Aug 25, 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 time of the year is the coldest?
Stony Brook, New York, records the coldest temperatures in January, averaging a high of 37.6°F (3.1°C) and a low of 29.1°F (-1.6°C).
What is the driest month in Stony Brook?
January is the month with the least rainfall. Rain falls for 6.8 days and accumulates 2.05" (52mm) of precipitation.
How much does it rain?
In Stony Brook, during the entire year, the rain falls for 146.8 days and collects up to 33.78" (858mm) of precipitation.
When does it snow?
January through March, October through December are months with snowfall.
How much does it snow?
In Stony Brook, during the entire year, snow falls for 12.6 days and aggregates up to 5.59" (142mm) of snow.
What is the month with the lowest UV index?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What is the month with the coldest ocean?
The month with the coldest seawater is February, with an average ocean temperature of 39.7°F (4.3°C).
What is the month with the least sunshine?
The month with the least sunshine is February, with an average of 4.7h of sunshine.
When does it snow the most?
The month with the most snowfall is March, when snow falls for 2.3 days and typically aggregates up to 2.13" (54mm) 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 Stony Brook, snow does not fall in April through September.
What are the most humid months?
The months with the highest humidity in Stony Brook are May and June, with an average relative humidity of 77%.
When are the longest days in Stony Brook?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What is the month with the highest UV index in Stony Brook?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the hottest time of year?
During the warmest month in Stony Brook, July, temperatures average a high of 79.2°F (26.2°C) and a low of 71.1°F (21.7°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.6h of sunshine.
What is the month with the warmest ocean?
With an average ocean temperature of 73.9°F (23.3°C), August is the month with the warmest seawater in Stony Brook.
What is the least humid month in Stony Brook?
The least humid month is November, with an average relative humidity of 71%.
What is the rainiest month?
December is the month with the most rainfall. Rain falls for 11.4 days and accumulates 3.58" (91mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year in Stony Brook, with an average of 9h and 18min of daylight.
Average temperature
Stony Brook, NY
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (37.6°F).
The months with the highest average low temperature are July and August (71.1°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure
Stony Brook, NY
- Average pressure in January:
30.04"Hg - Average pressure in February:
30.02"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:
29.95"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
Stony Brook, NY
- Average wind speed in January:
12.9mph - Average wind speed in February:
12.4mph - Average wind speed in March:
12.2mph - Average wind speed in April:
11.2mph - Average wind speed in May:
9.4mph - Average wind speed in June:
8.6mph
- Average wind speed in July:
8.3mph - Average wind speed in August:
8.5mph - Average wind speed in September:
9.8mph - Average wind speed in October:
11.7mph - Average wind speed in November:
12.4mph - Average wind speed in December:
12.7mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity
Stony Brook, NY
The months with the highest relative humidity are May and June (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall
Stony Brook, NY
- Average rainfall in January:
2.05" - Average rainfall in February:
2.17" - Average rainfall in March:
2.6" - Average rainfall in April:
2.83" - Average rainfall in May:
2.76" - Average rainfall in June:
2.72"
- Average rainfall in July:
3.54" - Average rainfall in August:
3.31" - Average rainfall in September:
2.4" - Average rainfall in October:
3.27" - Average rainfall in November:
2.56" - 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 January (2.05").
Average rainfall days
Stony Brook, NY
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
8.8 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
13.5 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
14.9 days
- Average rainfall days in July:
16.5 days - Average rainfall days in August:
15.7 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
13.1 days - Average rainfall days in November:
7.7 days - Average rainfall days in December:
11.4 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (6.8 days).
Average snowfall
Stony Brook, NY
The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days
Stony Brook, NY
- Average snowfall days in January:
3.5 days - Average snowfall days in February:
4.4 days - Average snowfall days in March:
2.3 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:
0.6 days - Average snowfall days in December:
1.5 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature
Stony Brook, NY
The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight / Average sunshine
Stony Brook, 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 2min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 3min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 3min - 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
Stony Brook, NY
- Average sunshine days in January:
19.8 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
15.2 days - Average sunshine days in May:
14.5 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
13.3 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
17 days - Average sunshine days in November:
20.5 days - Average sunshine days in December:
17.6 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (13 days).
Average UV index
Stony Brook, 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, November and December (UV index 2).
Average cloud cover
Stony Brook, NY
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Stony Brook, 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).
Stony Brook, New York, USA
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