Climate and monthly weather forecast
Swarthmore, PA

Weather in January

January, like December, in Swarthmore, 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). The coldest month is January, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 25.7°F (-3.5°C). 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 fluctuating between 27.9°F (-2.3°C) and 41.2°F (5.1°C). In Swarthmore, the average high-temperature in February is essentially the same as in January - a still wintry 41.2°F (5.1°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Swarthmore, Pennsylvania, with an average temperature ranging between min 34.9°F (1.6°C) and max 49.6°F (9.8°C). In Swarthmore, the average high-temperature in March slightly increases from a cold 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 an enjoyable spring month in Swarthmore, Pennsylvania, with an average temperature varying between 61.5°F (16.4°C) and 45°F (7.2°C). In April, the average high-temperature increases from a chilly 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 72°F (22.2°C) and 55°F (12.8°C). In Swarthmore, Pennsylvania, the average high-temperature in May rises from a comfortable 61.5°F (16.4°C) in April 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 Swarthmore, Pennsylvania, with an average temperature varying between 79.7°F (26.5°C) and 63.1°F (17.3°C). In Swarthmore, Pennsylvania, the average high-temperature in June marginally rises 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 Swarthmore, Pennsylvania, is another warm summer month, with temperature in the range of an average high of 85.6°F (29.8°C) and an average low of 68.7°F (20.4°C). With an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 68.7°F (20.4°C), July is the warmest month. The average heat index in 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 Swarthmore, Pennsylvania, with an average temperature varying between 67.3°F (19.6°C) and 83.5°F (28.6°C). In August, the average high-temperature is relatively the same as in July - a still moderately hot 83.5°F (28.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Swarthmore, Pennsylvania, with an average temperature fluctuating between 76.6°F (24.8°C) and 60.8°F (16°C). In September, the average high-temperature marginally drops from a moderately hot 83.5°F (28.6°C) in August to a still warm 76.6°F (24.8°C). Weather in September »

Weather in October

October, like September, in Swarthmore, Pennsylvania, is another comfortable autumn month, with an average temperature fluctuating between 64.9°F (18.3°C) and 50.7°F (10.4°C). In Swarthmore, the average high-temperature in October decreases from a warm 76.6°F (24.8°C) in September to an enjoyable 64.9°F (18.3°C). Weather in October »

Weather in November

November, the last month of the autumn in Swarthmore, is another cool month, with an average temperature ranging between max 52.7°F (11.5°C) and min 39.2°F (4°C). In Swarthmore, Pennsylvania, the average high-temperature in November decreases 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 also a frosty month in Swarthmore, Pennsylvania, with an average temperature fluctuating between 32.9°F (0.5°C) and 44.1°F (6.7°C). In Swarthmore, the average high-temperature in December slightly decreases from a fresh 52.7°F (11.5°C) in November to a chilly 44.1°F (6.7°C). Weather in December »
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FAQ

What is the coldest month in Swarthmore?

January is the coldest month in Swarthmore, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 25.7°F (-3.5°C).

What is the driest month in Swarthmore?

January is the month with the least rainfall in Swarthmore, Pennsylvania. Rain falls for 7.1 days and accumulates 1.61" (41mm) of precipitation.

How many days does it rain in Swarthmore?

In Swarthmore, during the entire year, the rain falls for 148.4 days and collects up to 25.94" (659mm) of precipitation.

When does it snow in Swarthmore?

January through May, November and December are months with snowfall.

How much does it snow in Swarthmore?

In Swarthmore, during the entire year, snow falls for 12.6 days and aggregates up to 7.28" (185mm) of snow.

What is the month with the lowest UV index in Swarthmore?

The months with the lowest UV index in Swarthmore are January, February, November and December, with an average maximum UV index of 2.

What are the most humid months 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 in Swarthmore?

With an average of 4.9h of sunshine, February has the least sunshine of the year in Swarthmore, Pennsylvania.

What is the snowiest month in Swarthmore?

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) in Swarthmore?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Swarthmore?

With an average relative humidity of 71%, April is the least humid month in Swarthmore.

When is the highest UV index in Swarthmore?

The months with the highest UV index in Swarthmore are May through August, with an average maximum UV index of 6.

When it does not snow in Swarthmore?

June through October are months without snowfall in Swarthmore, Pennsylvania.

When are the longest days in Swarthmore?

With an average of 14h and 58min of daylight, June has the longest days of the year in Swarthmore, Pennsylvania.

What is the warmest month in Swarthmore?

The warmest month is July, with an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 68.7°F (20.4°C).

What month has the most sunshine in Swarthmore?

The month with the most sunshine in Swarthmore, Pennsylvania, is July, with an average of 10.7h of sunshine.

What is the rainiest month in Swarthmore?

The month with the most rainfall in Swarthmore is August, when the rain falls for 16.1 days and typically aggregates up to 3.11" (79mm) of precipitation.

What is the month with the shortest days in Swarthmore?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

Average temperature
Swarthmore, PA

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).

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Average pressure
Swarthmore, PA

Average pressure - Swarthmore, PA

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed
Swarthmore, PA

Average wind speed - Swarthmore, PA

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).

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Average humidity
Swarthmore, PA

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%).

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Average rainfall
Swarthmore, PA

Average rainfall - Swarthmore, PA

The wettest month (with the highest rainfall) is August (3.11").
The driest month (with the least rainfall) is January (1.61").

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Average rainfall days
Swarthmore, PA

Average rainfall days - Swarthmore, PA

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).

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Average snowfall
Swarthmore, PA

Average snowfall - Swarthmore, PA

The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days
Swarthmore, PA

Average snowfall days - Swarthmore, PA

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).

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Average daylight / Average sunshine
Swarthmore, PA

Average daylight / Average sunshine - Swarthmore, PA

The month with the longest days is June (Average daylight: 14h and 58min).
The month with the shortest days is December (Average daylight: 9h and 24min).

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).

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Average sunshine days
Swarthmore, PA

Average sunshine days - Swarthmore, PA

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (11.3 days).

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Average UV index
Swarthmore, PA

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).

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Average visibility
Swarthmore, PA

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).

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