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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 daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is an icy winter month in Swarthmore, Pennsylvania, with an average temperature ranging between max 37.4°F (3°C) and min 25.7°F (-3.5°C). January, with an average high of 37.4°F (3°C) and a low of 25.7°F (-3.5°C), signifies the coldest month of the year. Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Swarthmore, Pennsylvania, with an average temperature ranging between max 41.2°F (5.1°C) and min 27.9°F (-2.3°C). Swarthmore starts February with an average high-temperature of a still wintry 41.2°F (5.1°C), hinting at a minimal fluctuation from January. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Swarthmore, Pennsylvania, with an average temperature varying between 34.9°F (1.6°C) and 49.6°F (9.8°C). As Swarthmore, Pennsylvania, welcomes March, the average high-temperature sees a modest rise, transitioning from an icy 41.2°F (5.1°C) in February to a frosty 49.6°F (9.8°C). Weather in March »
Weather in April
April is a comfortable spring month in Swarthmore, Pennsylvania, with an average temperature fluctuating between 61.5°F (16.4°C) and 45°F (7.2°C). The shift into April brings an increase in the average high-temperature, moving from a frosty 49.6°F (9.8°C) in March to an enjoyable 61.5°F (16.4°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Swarthmore, Pennsylvania, with an average temperature fluctuating between 55°F (12.8°C) and 72°F (22.2°C). The shift from April to May brings an increase in the average high-temperature, moving from a refreshing 61.5°F (16.4°C) to a pleasant 72°F (22.2°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Swarthmore, Pennsylvania, with an average temperature fluctuating between 63.1°F (17.3°C) and 79.7°F (26.5°C). With the onset of June, Swarthmore observes a minor temperature ascent, with the average high-temperature adjusting from May's agreeable 72°F (22.2°C) to a warm 79.7°F (26.5°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Swarthmore, Pennsylvania, with an average temperature varying between 68.7°F (20.4°C) and 85.6°F (29.8°C). July, on average, is the warmest month, registering a high temperature of 85.6°F (29.8°C) and a low of 68.7°F (20.4°C). The heat index value for July is evaluated at a fiery hot 95°F (35°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Swarthmore, Pennsylvania, with an average temperature ranging between max 83.5°F (28.6°C) and min 67.3°F (19.6°C). The arrival of August brings an average high-temperature of a still moderately hot 83.5°F (28.6°C), nearly identical to July's 85.6°F (29.8°C). Weather in August »
Weather in September
September, the first month of the autumn in Swarthmore, is also a moderately hot month, with an average temperature ranging between max 76.6°F (24.8°C) and min 60.8°F (16°C). Swarthmore's progression into September involves a minor drop in the average high-temperature, slightly receding from 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, the same as September, is another comfortable autumn month in Swarthmore, Pennsylvania, with temperature in the range of an average low of 50.7°F (10.4°C) and an average high of 64.9°F (18.3°C). The average high-temperature drops in October, from September's moderately hot 76.6°F (24.8°C) to a comfortable 64.9°F (18.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Swarthmore, is also a fresh month, with temperature in the range of an average low of 39.2°F (4°C) and an average high of 52.7°F (11.5°C). The beginning of November involves a decrease in the average high-temperature, transitioning from an enjoyable 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 Swarthmore, Pennsylvania, with temperature in the range of an average high of 44.1°F (6.7°C) and an average low of 32.9°F (0.5°C). The beginning of December brings a minor change in the average high-temperature, shifting from a cool 52.7°F (11.5°C) in November to a frosty 44.1°F (6.7°C). Weather in December »
Updated: Jun 27, 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 is the coldest time of year?
Swarthmore's January weather reaches an average high of 37.4°F (3°C) and an average low of 25.7°F (-3.5°C), making it the coldest month.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 7.1 days and typically collects 1.61" (41mm) of precipitation.
How much does it rain?
Throughout the year, there are 148.4 rainfall days, and 25.94" (659mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, November and December.
How many days does it snow?
In Swarthmore, during the entire year, snow falls for 12.6 days and aggregates up to 7.28" (185mm) of snow.
What are the months with the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the most humid month in Swarthmore?
February, October and December, with an average relative humidity of 77%, are most humid months.
What is the month with the least sunshine?
The month with the least sunshine in Swarthmore is February, with an average of 4.9h of sunshine.
When does it snow the most?
The month with the most snowfall is March, when snow falls for 3 days and typically aggregates up to 2.32" (59mm) 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.
What is the least humid month?
With an average relative humidity of 71%, April is the least humid month in Swarthmore.
What is the month with the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When it does not snow?
June through October are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 0min of daylight.
What month is the hottest?
Swarthmore's temperatures tend to reach their peak averages in July, with a high of 85.6°F (29.8°C) and a low of 68.7°F (20.4°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.7h of sunshine.
What is the wettest month?
August is the month with the most rainfall. Rain falls for 16.1 days and accumulates 3.11" (79mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Swarthmore, 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
Swarthmore, 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
Swarthmore, 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
Swarthmore, 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
Swarthmore, 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
Swarthmore, 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
Swarthmore, 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
Swarthmore, 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
Swarthmore, PA
- 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
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 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 3min - Average sunshine in May:
8h and 4min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 1min
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
Swarthmore, 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
Swarthmore, 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
Swarthmore, 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
Swarthmore, 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).
Swarthmore, Pennsylvania, USA
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