Climate and monthly weather forecastRosemont, PA
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Rosemont, Pennsylvania, with an average temperature ranging between max 36.7°F (2.6°C) and min 25°F (-3.9°C). January, having an average high-temperature of 36.7°F (2.6°C) and an average low-temperature of 25°F (-3.9°C), is the coldest month. Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Rosemont, Pennsylvania, with temperature in the range of an average high of 40.3°F (4.6°C) and an average low of 27°F (-2.8°C). The onset of February marks an average high-temperature of a still icy 40.3°F (4.6°C), hardly differing from January's 36.7°F (2.6°C). Weather in February »Weather in March
March, the first month of the spring in Rosemont, is a chilly month, 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). As Rosemont enters March, the average high-temperature marginally increases from the a wintry 40.3°F (4.6°C) of February to a frosty 49.1°F (9.5°C). Weather in March »Weather in April
April is a refreshing spring month in Rosemont, Pennsylvania, with an average temperature fluctuating between 44.2°F (6.8°C) and 61.2°F (16.2°C). The arrival of April brings a change in Rosemont's weather, with average high-temperatures moving from March's frosty 49.1°F (9.5°C) to a refreshing 61.2°F (16.2°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Rosemont, Pennsylvania, with an average temperature ranging between min 54.3°F (12.4°C) and max 71.8°F (22.1°C). Rosemont in May experiences an increase in the average high-temperature, moving from April's comfortable 61.2°F (16.2°C) to an agreeable 71.8°F (22.1°C). Weather in May »Weather in June
June, the first month of the summer in Rosemont, is a moderately hot month, with an average temperature varying between 62.6°F (17°C) and 79.9°F (26.6°C). The shift into June is marked by a modest rise in the average high-temperature, moving from May's pleasant 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 Rosemont, Pennsylvania, is a moderately hot summer month, with an average temperature varying between 85.8°F (29.9°C) and 68.9°F (20.5°C). Rosemont's warmest temperatures are experienced in July, with average high temperatures of 85.8°F (29.9°C) and lows of 68.9°F (20.5°C). The heat index value during July is calculated to be a torrid 95°F (35°C). Weather in July »Weather in August
August, the last month of the summer in Rosemont, is also a moderately hot month, with an average temperature varying between 83.7°F (28.7°C) and 67.5°F (19.7°C). As July transitions into August, the average high-temperature rests at a still warm 83.7°F (28.7°C), maintaining a close resemblance to the previous month. Weather in August »Weather in September
September, the first month of the autumn in Rosemont, is also a moderately hot month, with an average temperature ranging between min 59.9°F (15.5°C) and max 76.5°F (24.7°C). The start of September signals a gentle decrease in the average high-temperature, transitioning from 83.7°F (28.7°C) in August to a still moderately hot 76.5°F (24.7°C). Weather in September »Weather in October
October, like September, in Rosemont, Pennsylvania, is another refreshing autumn month, with an average temperature ranging between max 64.2°F (17.9°C) and min 50°F (10°C). As October commences, the average high-temperature shows a reduction, transitioning from a moderately hot 76.5°F (24.7°C) in September to a comfortable 64.2°F (17.9°C). Weather in October »Weather in November
November, the last month of the autumn in Rosemont, is another cool month, with temperature in the range of an average low of 38.3°F (3.5°C) and an average high of 52°F (11.1°C). With the onset of November, Rosemont experiences a modest temperature adjustment, with the average high-temperature receding from a comfortable 64.2°F (17.9°C) in October to a cool 52°F (11.1°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Rosemont, Pennsylvania, with an average temperature varying between 43.2°F (6.2°C) and 32°F (0°C). December ushers in a minute temperature change, with average high-temperatures reducing from November's cool 52°F (11.1°C) to a chilly 43.2°F (6.2°C). Weather in December »Updated: Jun 17, 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
During the coldest month in Rosemont, January, temperatures average a high 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.
In Rosemont, during the entire year, the rain falls for 111.8 days and collects up to 9.69" (246mm) of precipitation.
January through March, November and December are months with snowfall.
Throughout the year, there are 15.1 snowfall days, and 3.66" (93mm) of snow is accumulated.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The months with the highest humidity are February and October, with an average relative humidity of 78%.
The months with the most snowfall in Rosemont are February and March, with an average 0.98" (25mm) of accumulated snow.
With an average of 4.6h of sunshine, February has the least sunshine of the year.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rosemont, 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 is June, with an average of 15h and 0min of daylight.
July is the month when Rosemont experiences its warmest 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.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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
Rosemont, 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).
