Climate and monthly weather forecastExton, PA
Climate and monthly weather forecast
The climate of Exton
Exton, located in Pennsylvania, USA, experiences a Humid subtropical climate with no dry season, classified as Cfa according to the Köppen climate classification. Over the year, temperatures fluctuate from a low of 24.3°F (-4.3°C) to a high of 84.9°F (29.4°C), resulting in a highly variable climatic pattern. Similarly, rainfall varies across the year, reaching a maximum of 1.89" (48mm) in August and a minimum of 0.79" (20mm) in January.Consistent with the region's climate classification, no month goes without significant rainfall. However, the number of days with rain varies from a peak of 15.1 days in July, down to 5 days in January. Considerable deviations are also evident in the amount of daylight available, ranging from 9.4 hours in December to 15 hours in June.
One distinguishing weather pattern is the heat peak in July, where the temperature can go up from 24.3°F (-4.3°C) to 84.9°F (29.4°C). The maximum number of rainy days occurs in July as well which indicates a correlation between the rise in temperature and increased precipitation.
The best time to visit Exton
The optimal time for visiting Exton depends largely on the visitor’s weather preferences. If mild temperatures are desirable, the months of May and October are considered the best. During these months, the average peak temperatures hover between 71.1°F (21.7°C) and 63.5°F (17.5°C) respectively, and rainfall is moderate, ranging from 1.38" (35mm) to 0.94" (24mm). Furthermore, daylight hours extend to 14.4 hours in May and remain ample in October with 11.1 hours, allowing for extended exploration of the outdoors. These months also witness relatively lower humidity levels of 77% and 79% respectively, increasing overall comfort.The worst time to visit Exton
January and February, being the coldest months with temperatures falling to 24.3°F (-4.3°C) and 26.4°F (-3.1°C) respectively, are considered the least desirable times of the year to visit Exton. The amount of daylight also dips to 9.7 hours in January, further limiting activities for tourists. These months witness uncomfortable weather conditions with high relative humidity levels of 76% and 79% respectively. In addition to cold temperatures, snowfall is more likely during these months, with an average of 1.26" (32mm) in January and 1.3" (33mm) in February.Spring weather in Exton
Spring, from March to May, brings with it a pleasant rise in temperature in Exton. During these months, the temperatures swing from 33.4°F (0.8°C) in March to 71.1°F (21.7°C) in May. Daylight hours increase from 12 hours in March to 14.4 hours in May, while humidity levels hover between 73% and 77%. Rainfall is substantial during this season, peaking at 1.38" (35mm) in May, indicating the presence of occasional spring showers.Summer weather in Exton
Summer weather in Exton, from June through August, is characterized by high temperatures and significant rainfall. The thermal readings peak during this season, hitting 84.9°F (29.4°C) in July, the hottest month of the year. In contrast, August witnesses the highest rainfall of 1.89" (48mm). Despite the heat, there is a plentiful amount of sunshine, with daylight extending to 14.7 hours in June, providing plenty of time for outdoor activities.Autumn weather in Exton
Autumn marks a period of transition in Exton with the weather gradually shifting from hot to cooler conditions. September sees a significant drop in temperatures from 75.7°F (24.3°C) to 63.5°F (17.5°C) in October. Rainfall remains substantial in these months, particularly in August when the precipitation averages 1.06" (27mm). Daylight hours also reduce from 12.4 hours in September to 11.1 hours in October.Winter weather in Exton
Winter, ranging from November to February, is characterized by the drop in temperature to the year's lowest levels. November witnesses a considerable drop in temperature from 51.4°F (10.8°C) to 42.3°F (5.7°C) in December. January is the coldest month with average temperatures dropping to 24.3°F (-4.3°C). Snowfall occurs during these months with the heaviest of 1.26" (32mm) reported in January. Despite the cold conditions, sunshine remains available for an average of 4.6 to 5 hours per day throughout the winter months, providing some respite from typical winter weather.Weather in January
The start of the year in Exton, Pennsylvania, is marked by winter's chill. The city experiences cold weather with temperatures ranging from 24.3°F (-4.3°C) to 36.1°F (2.3°C), flirting with the frost mark - a wintry start to the year. Weather in January »Weather in February
As Exton moves into February, a slight increase in the average temperatures, from 26.4°F (-3.1°C) to 39.7°F (4.3°C), is observed. The Winter weather persists, but with less snowfall compared to January, at 1.3" (33mm) over an average of five days. Weather in February »Weather in March
With the arrival of March, Exton witnesses a notable shift in weather from cold to warmer temperatures. The city experiences a marked climb in temperatures, ranging between 33.4°F (0.8°C) and 48.2°F (9°C). The snowfall begins to diminish with just 1.57" (40mm) recorded, spread across fewer days when compared to the preceding months. Weather in March »Weather in April
April's arrival in Exton comes with an appreciable jump in temperature, climbing from 43.5°F (6.4°C) to 60.6°F (15.9°C). Spring is in full bloom, with the most substantial dip in the snowfall to an almost negligible 0.16" (4mm). Weather in April »Weather in May
In Exton, May welcomes warmer weather with temperatures dancing between 53.6°F (12°C) and 71.1°F (21.7°C). This is the first month of the year that experiences no snowfall, demonstrating a solid transition from spring to summer. Weather in May »Weather in June
June's arrival marks the official commencement of summer in Exton, elevating temperature levels up to 79°F (26.1°C) from a base of 61.5°F (16.4°C). Coupled with the year's lengthiest days, the month also brings one of the highest rainfall averages at 1.46" (37mm). Weather in June »Weather in July
July, being the hottest month in Exton, showcases a temperature range from 67.5°F (19.7°C) to 84.9°F (29.4°C). The weather is typically warm with a modest rise in humidity. Rainfall reaches its peak with averages around 1.81" (46mm), paving the way for spontaneous summer downpours. Weather in July »Weather in August
In Exton, August carries forward the warm temperatures from July with averages between 65.8°F (18.8°C) and 82.4°F (28°C). The maximum rainfall occurs with 1.89" (48mm), slightly higher than July. This month brings about a mild decrease in daylight hours, signaling the approach of the fall season. Weather in August »Weather in September
September in Exton brings a shift towards cooler temperatures, moving from 59.2°F (15.1°C) to 75.7°F (24.3°C). The summer heat starts fading with a significant drop in rainfall, standing at 1.06" (27mm). The decrease in rainfall also coincides with a decline in daylight hours, marking the impending arrival of the fall season. Weather in September »Weather in October
October in Exton sees a further drop in temperatures, now varying between 48.9°F (9.4°C) and 63.5°F (17.5°C). This month brings on the full-blown fall season with a significant decline in rainfall to 0.94" (24mm). The transition towards shorter days becomes prominent, and the drop in temperature makes the climate considerably chillier. Weather in October »Weather in November
November in Exton experiences a substantial plunge in temperatures, ranging from 37.4°F (3°C) to 51.4°F (10.8°C), with the winter season starting to set in. The initial signs of winter become evident, with an average snowfall of 0.28" (7mm) recorded during the month. Weather in November »Weather in December
Closing the year in Exton, December brings a pronounced onset of winter, dropping the temperature between 31.1°F (-0.5°C) and 42.3°F (5.7°C). The city experiences increased snowfall with 0.79" (20mm) registered over more than two days of the month. Weather in December »Updated: Aug 15, 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
The coldest period is January, when temperatures fluctuate between an average high of 36.1°F (2.3°C) and a low of 24.3°F (-4.3°C).
The month with the least rainfall is January, when the rain falls for 5 days and typically collects 0.79" (20mm) of precipitation.
Throughout the year, there are 124.6 rainfall days, and 14.25" (362mm) of precipitation is accumulated.
Months with snowfall are January through May, November and December.
Throughout the year, there are 18.5 snowfall days, and 5.51" (140mm) of snow is accumulated.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February and October, with an average relative humidity of 79%, are most humid months.
The month with the least sunshine is February, with an average of 4.5h of sunshine.
The month with the most snowfall in Exton is March, when snow falls for 4.5 days and typically aggregates up to 1.57" (40mm) 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.
April and July, with an average relative humidity of 73%, are the least humid months.
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.
The month with the longest days is June, with an average of 15h and 0min of daylight.
Exton's warmest month, July, registers temperatures that range from a high of 84.9°F (29.4°C) to a low of 67.5°F (19.7°C).
With an average of 10.5h of sunshine, July has the most sunshine of the year.
August is the month with the most rainfall. Rain falls for 14.4 days and accumulates 1.89" (48mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Exton, PA
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (36.1°F).
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure
Exton, 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:
30.06"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.1"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
Exton, PA
- Average wind speed in January:
8.3mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7mph - Average wind speed in November:
7.4mph - Average wind speed in December:
7.9mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity
Exton, PA
The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (73%).
Average rainfall
Exton, PA
- Average rainfall in January:
0.79" - Average rainfall in February:
0.83" - Average rainfall in March:
1.06" - Average rainfall in April:
0.98" - Average rainfall in May:
1.38" - Average rainfall in June:
1.46"
- Average rainfall in July:
1.81" - Average rainfall in August:
1.89" - Average rainfall in September:
1.06" - Average rainfall in October:
0.94" - Average rainfall in November:
0.91" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days
Exton, PA
- Average rainfall days in January:
5 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
9.1 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
13.7 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
14.4 days - Average rainfall days in September:
11.1 days - Average rainfall days in October:
9.1 days - Average rainfall days in November:
6.7 days - Average rainfall days in December:
7.7 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (5 days).
Average snowfall
Exton, PA
- Average snowfall in January:
1.26" - Average snowfall in February:
1.3" - Average snowfall in March:
1.57" - Average snowfall in April:
0.16" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is March (1.57").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Exton, PA
- Average snowfall days in January:
5.4 days - Average snowfall days in February:
5.2 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.2 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:
2.2 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Exton, 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 36min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 12min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 24min - Average sunshine in October:
5h and 24min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
Exton, PA
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
16.9 days - Average sunshine days in March:
17.1 days - Average sunshine days in April:
16.1 days - Average sunshine days in May:
14.4 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
13.7 days - Average sunshine days in August:
14.1 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
21.7 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is June (13.3 days).
Average UV index
Exton, 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, March, November and December (UV index 2).
Average cloud cover
Exton, PA
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility
Exton, PA
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
