Climate and monthly weather forecastBrookhaven, PA
Climate and monthly weather forecast
Weather in January
January, like December, in Brookhaven, Pennsylvania, is another cold winter month, with temperature in the range of an average high of 37.4°F (3°C) and an average low of 25.7°F (-3.5°C). January is the month when Brookhaven sees the lowest average temperatures, with a high of 37.4°F (3°C) and a low of 25.7°F (-3.5°C). Weather in January »Weather in February
February, the last month of the winter in Brookhaven, is another cold month, with an average temperature ranging between max 41.2°F (5.1°C) and min 27.9°F (-2.3°C). With the advent of February, Brookhaven's high-temperatures adjust to a still icy 41.2°F (5.1°C), closely aligning with the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Brookhaven, Pennsylvania, with an average temperature ranging between max 49.6°F (9.8°C) and min 34.9°F (1.6°C). March's onset is marked by a subtle temperature increase, moving from an icy 41.2°F (5.1°C) in February to a chilly 49.6°F (9.8°C). Weather in March »Weather in April
April in Brookhaven, Pennsylvania, is a refreshing spring month, with an average temperature varying between 45°F (7.2°C) and 61.5°F (16.4°C). April's arrival signals an increase in average high-temperatures, moving from March's chilly 49.6°F (9.8°C) to a refreshing 61.5°F (16.4°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Brookhaven, Pennsylvania, with an average temperature fluctuating between 55°F (12.8°C) and 72°F (22.2°C). In Brookhaven, the onset of May comes with an increased average high-temperature, moving from April's comfortable 61.5°F (16.4°C) to an agreeable 72°F (22.2°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Brookhaven, Pennsylvania, with an average temperature fluctuating between 79.7°F (26.5°C) and 63.1°F (17.3°C). Brookhaven in June observes a minor temperature shift, with average high-temperatures adjusting from a pleasant 72°F (22.2°C) in May to a warm 79.7°F (26.5°C). Weather in June »Weather in July
July, like June, in Brookhaven, Pennsylvania, is another warm summer month, with an average temperature ranging between max 85.6°F (29.8°C) and min 68.7°F (20.4°C). In Brookhaven, Pennsylvania, July records the highest average temperatures, peaking at 85.6°F (29.8°C) and reaching a low of 68.7°F (20.4°C). July's heat index is estimated at a sweltering 95°F (35°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Brookhaven, Pennsylvania, with an average temperature ranging between min 67.3°F (19.6°C) and max 83.5°F (28.6°C). The onset of August marks an average high-temperature of a still warm 83.5°F (28.6°C), hardly differing from July's 85.6°F (29.8°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Brookhaven, Pennsylvania, with an average temperature ranging between min 60.8°F (16°C) and max 76.6°F (24.8°C). Transition into September subtly marks a drop in the average high-temperature, moderately moving from a warm 83.5°F (28.6°C) in August to a still moderately hot 76.6°F (24.8°C). Weather in September »Weather in October
October, like September, in Brookhaven, Pennsylvania, is another enjoyable autumn month, with an average temperature varying between 50.7°F (10.4°C) and 64.9°F (18.3°C). Brookhaven, Pennsylvania, experiences a temperature shift at the start of October, with average high-temperatures adjusting from a moderately hot 76.6°F (24.8°C) in September to an enjoyable 64.9°F (18.3°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Brookhaven, Pennsylvania, with an average temperature ranging between min 39.2°F (4°C) and max 52.7°F (11.5°C). Brookhaven's progression into November involves a drop in the average high-temperature, receding from a refreshing 64.9°F (18.3°C) in October to a fresh 52.7°F (11.5°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Brookhaven, Pennsylvania, with an average temperature ranging between max 44.1°F (6.7°C) and min 32.9°F (0.5°C). A modest decline in the average high-temperature is seen during December, decreasing from a cool 52.7°F (11.5°C) in November to a chilly 44.1°F (6.7°C). Weather in December »Updated: Jun 7, 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
Brookhaven witnesses the coldest weather in January, with temperatures averaging a high of 37.4°F (3°C) and a low of 25.7°F (-3.5°C).
The month with the least rainfall is January, when the rain falls for 7.1 days and typically collects 1.61" (41mm) of precipitation.
In Brookhaven, during the entire year, the rain falls for 148.4 days and collects up to 25.94" (659mm) of precipitation.
January through May, November and December are months with snowfall in Brookhaven.
Throughout the year, there are 12.6 snowfall days, and 7.28" (185mm) of snow is accumulated.
The months with the lowest UV index in Brookhaven, Pennsylvania, are January, February, November and December, with an average maximum UV index of 2.
The months with the highest humidity are February, October and December, with an average relative humidity of 77%.
With an average of 4.9h of sunshine, February has the least sunshine of the year in Brookhaven.
March is the month with the most snowfall. Snow falls for 3 days and accumulates 2.32" (59mm) 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 least humid month is April, with an average relative humidity of 71%.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
June through October are months without snowfall in Brookhaven.
The month with the longest days is June, with an average of 15h and 0min of daylight.
Brookhaven witnesses the warmest weather in July, with temperatures averaging a high of 85.6°F (29.8°C) and a low of 68.7°F (20.4°C).
The month with the most sunshine is July, with an average of 10.7h of sunshine.
The month with the most rainfall is August, when the rain falls for 16.1 days and typically aggregates up to 3.11" (79mm) of precipitation.
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Brookhaven, PA
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.4°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
Brookhaven, PA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"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:
30.12"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Brookhaven, PA
- Average wind speed in January:
8.4mph - Average wind speed in February:
8.5mph - Average wind speed in March:
8.6mph - Average wind speed in April:
8.5mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.5mph - Average wind speed in September:
5.9mph - Average wind speed in October:
7.2mph - Average wind speed in November:
7.6mph - Average wind speed in December:
7.9mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity
Brookhaven, PA
The months with the highest relative humidity are February, October and December (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall
Brookhaven, PA
- Average rainfall in January:
1.61" - Average rainfall in February:
1.73" - Average rainfall in March:
2.28" - Average rainfall in April:
2.01" - Average rainfall in May:
2.32" - Average rainfall in June:
2.28"
- Average rainfall in July:
2.68" - Average rainfall in August:
3.11" - Average rainfall in September:
1.73" - Average rainfall in October:
1.97" - Average rainfall in November:
1.89" - Average rainfall in December:
2.32"
The wettest month (with the highest rainfall) is August (3.11").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days
Brookhaven, PA
- Average rainfall days in January:
7.1 days - Average rainfall days in February:
8.2 days - Average rainfall days in March:
13.2 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
16.1 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
11.7 days - Average rainfall days in November:
8.7 days - Average rainfall days in December:
8.7 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (7.1 days).
Average snowfall
Brookhaven, PA
- Average snowfall in January:
1.73" - Average snowfall in February:
1.61" - Average snowfall in March:
2.32" - Average snowfall in April:
0.2" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Brookhaven, PA
- Average snowfall days in January:
3.5 days - Average snowfall days in February:
3.8 days - Average snowfall days in March:
3 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:
0.4 days - Average snowfall days in December:
1.5 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Brookhaven, PA
- 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:
10h and 0min - Average daylight in December:
9h and 24min
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 24min).
- Average sunshine in January:
5h and 0min - Average sunshine in February:
4h and 54min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 30min - Average sunshine in May:
8h and 42min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 42min - Average sunshine in December:
5h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days
Brookhaven, PA
- Average sunshine days in January:
20.8 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
12.5 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
12.5 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
20.3 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (11.3 days).
Average UV index
Brookhaven, PA
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, November and December (UV index 2).
Average cloud cover
Brookhaven, PA
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility
Brookhaven, PA
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).
