Climate and monthly weather forecastBryn Mawr, PA
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Bryn Mawr, Pennsylvania, with an average temperature ranging between min 25°F (-3.9°C) and max 36.7°F (2.6°C). The month of January, characterized by an average high of 36.7°F (2.6°C) and a low of 25°F (-3.9°C), is recognized as the coldest. Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Bryn Mawr, Pennsylvania, with an average temperature varying between 40.3°F (4.6°C) and 27°F (-2.8°C). Upon the onset of February, Bryn Mawr witnesses an average high-temperature of a still icy 40.3°F (4.6°C), showing a close resemblance to the prior month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Bryn Mawr, Pennsylvania, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 49.1°F (9.5°C). March's onset brings a subtle temperature rise, moving from a cold 40.3°F (4.6°C) in February to a chilly 49.1°F (9.5°C). Weather in March »Weather in April
April is a comfortable spring month in Bryn Mawr, Pennsylvania, with an average temperature ranging between max 61.2°F (16.2°C) and min 44.2°F (6.8°C). April's arrival brings a temperature shift, moving from a frosty 49.1°F (9.5°C) in March to a comfortable 61.2°F (16.2°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Bryn Mawr, Pennsylvania, with an average temperature ranging between max 71.8°F (22.1°C) and min 54.3°F (12.4°C). With the onset of May, Bryn Mawr experiences a temperature shift, with the average high-temperature moving from a comfortable 61.2°F (16.2°C) in April to a pleasant 71.8°F (22.1°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Bryn Mawr, Pennsylvania, with temperature in the range of an average high of 79.9°F (26.6°C) and an average low of 62.6°F (17°C). As June arrives, Bryn Mawr's weather shows a minor increase in high-temperatures, edging from May's agreeable 71.8°F (22.1°C) to a moderately hot 79.9°F (26.6°C). Weather in June »Weather in July
July, like June, in Bryn Mawr, Pennsylvania, is a moderately hot summer month, with temperature in the range of an average high of 85.8°F (29.9°C) and an average low of 68.9°F (20.5°C). Bryn Mawr witnesses the warmest weather in July, with temperatures averaging a high of 85.8°F (29.9°C) and a low of 68.9°F (20.5°C). The heat index for July is computed to be a sweltering 95°F (35°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Bryn Mawr, Pennsylvania, with an average temperature ranging between min 67.5°F (19.7°C) and max 83.7°F (28.7°C). Bryn Mawr's entry into August measures an average high-temperature of a still warm 83.7°F (28.7°C), closely parallel to the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Bryn Mawr, Pennsylvania, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 59.9°F (15.5°C). The advent of September brings a slight shift in average high-temperature, moving from a moderately hot 83.7°F (28.7°C) in August to a still warm 76.5°F (24.7°C). Weather in September »Weather in October
October, like September, in Bryn Mawr, Pennsylvania, is another enjoyable autumn month, with temperature in the range of an average high of 64.2°F (17.9°C) and an average low of 50°F (10°C). As September transitions to October, the average high-temperature falls from a moderately hot 76.5°F (24.7°C) to an enjoyable 64.2°F (17.9°C). Weather in October »Weather in November
November, the last month of the autumn in Bryn Mawr, is also a fresh month, with an average temperature ranging between min 38.3°F (3.5°C) and max 52°F (11.1°C). Bryn Mawr's November weather features a mild decline in high-temperatures, reducing from a comfortable 64.2°F (17.9°C) in October to a fresh 52°F (11.1°C). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in Bryn Mawr, Pennsylvania, with temperature in the range of an average low of 32°F (0°C) and an average high of 43.2°F (6.2°C). December reveals a small adjustment in temperature, transitioning from an average high of a fresh 52°F (11.1°C) in November to a frosty 43.2°F (6.2°C). Weather in December »Updated: Aug 2, 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
January, on average, is the coldest month, registering a high temperature of 36.7°F (2.6°C) and a low of 25°F (-3.9°C).
January is the month with the least rainfall. Rain falls for 5.3 days and accumulates 0.55" (14mm) of precipitation.
Throughout the year, there are 111.8 rainfall days, and 9.69" (246mm) of precipitation is accumulated.
Months with snowfall are January through March, November and December.
Throughout the year, there are 15.1 snowfall days, and 3.66" (93mm) of snow is accumulated.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February and October, with an average relative humidity of 78%, are most humid months.
The months with the most snowfall are February and March, with an average 0.98" (25mm) of accumulated snow.
The month with the least sunshine is February, with an average of 4.6h 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.
The months with the lowest humidity are April, July and August, with an average relative humidity of 71%.
April through October are months without snowfall.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
The month with the longest days in Bryn Mawr is June, with an average of 15h and 0min of daylight.
In Bryn Mawr, July is the warmest month, with temperatures averaging a high of 85.8°F (29.9°C) and a low of 68.9°F (20.5°C).
The months with the most rainfall are July and August, with an average 1.14" (29mm) of precipitation.
The month with the most sunshine is July, with an average of 10.6h of sunshine.
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Bryn Mawr, PA
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (36.7°F).
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure
Bryn Mawr, 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
Bryn Mawr, PA
- Average wind speed in January:
8.2mph - Average wind speed in February:
8.2mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.4mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5.5mph - Average wind speed in September:
5.9mph - Average wind speed in October:
7mph - Average wind speed in November:
7.4mph - Average wind speed in December:
7.8mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity
Bryn Mawr, PA
The months with the highest relative humidity are February and October (78%).
The months with the lowest relative humidity are April, July and August (71%).
Average rainfall
Bryn Mawr, PA
- Average rainfall in January:
0.55" - Average rainfall in February:
0.63" - Average rainfall in March:
0.79" - Average rainfall in April:
0.75" - Average rainfall in May:
0.91" - Average rainfall in June:
0.98"
- Average rainfall in July:
1.14" - Average rainfall in August:
1.14" - Average rainfall in September:
0.63" - Average rainfall in October:
0.63" - Average rainfall in November:
0.63" - Average rainfall in December:
0.91"
The wettest months (with the highest rainfall) are July and August (1.14").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days
Bryn Mawr, PA
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
6.2 days - Average rainfall days in March:
8.7 days - Average rainfall days in April:
10.7 days - Average rainfall days in May:
12.6 days - Average rainfall days in June:
12 days
- Average rainfall days in July:
13.3 days - Average rainfall days in August:
12.2 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
8.3 days - Average rainfall days in November:
5.9 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is January (5.3 days).
Average snowfall
Bryn Mawr, PA
The months with the highest snowfall are February and March (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Bryn Mawr, PA
- Average snowfall days in January:
4.5 days - Average snowfall days in February:
4.4 days - Average snowfall days in March:
3.1 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:
0.7 days - Average snowfall days in December:
2.1 days
The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Bryn Mawr, 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:
4h and 48min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 36min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 54min
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 36min).
Average sunshine days
Bryn Mawr, PA
- Average sunshine days in January:
21.9 days - Average sunshine days in February:
18.3 days - Average sunshine days in March:
19.2 days - Average sunshine days in April:
17.5 days - Average sunshine days in May:
15.3 days - Average sunshine days in June:
15.3 days
- Average sunshine days in July:
14.9 days - Average sunshine days in August:
15.4 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
20.5 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
22.2 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (14.9 days).
Average UV index
Bryn Mawr, 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
Bryn Mawr, PA
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Bryn Mawr, PA
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
