Climate and monthly weather forecast
Williamsport, PA

Weather in January

January, like December, is another subzero cold winter month in Williamsport, Pennsylvania, with an average temperature fluctuating between 18.9°F (-7.3°C) and 30.6°F (-0.8°C). The coldest month is January, with an average high-temperature of 30.6°F (-0.8°C) and an average low-temperature of 18.9°F (-7.3°C). Weather in January »

Weather in February

February, the last month of the winter in Williamsport, is a cold month, with an average temperature varying between 34.5°F (1.4°C) and 20.7°F (-6.3°C). In February, the average high-temperature is practically the same as in January - a cold 34.5°F (1.4°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Williamsport, Pennsylvania, with temperature in the range of an average high of 44.2°F (6.8°C) and an average low of 27.7°F (-2.4°C). In Williamsport, the average high-temperature in March increases from a cold 34.5°F (1.4°C) in February to a frosty 44.2°F (6.8°C). Weather in March »

Weather in April

April in Williamsport, Pennsylvania, is a mild spring month, with temperature in the range of an average low of 37.8°F (3.2°C) and an average high of 56.5°F (13.6°C). In Williamsport, the average high-temperature in April rises from a frosty 44.2°F (6.8°C) in March to a moderate 56.5°F (13.6°C). Weather in April »

Weather in May

May, the last month of the spring in Williamsport, is a pleasant month, with an average temperature varying between 48°F (8.9°C) and 68.4°F (20.2°C). In May, the average high-temperature rises from a moderate 56.5°F (13.6°C) in April to an agreeable 68.4°F (20.2°C). Weather in May »

Weather in June

June, the first month of the summer in Williamsport, is a warm month, with an average temperature ranging between min 54.7°F (12.6°C) and max 76.1°F (24.5°C). In Williamsport, the average high-temperature in June slightly increases from a pleasant 68.4°F (20.2°C) in May to a moderately hot 76.1°F (24.5°C). Weather in June »

Weather in July

July, like June, in Williamsport, Pennsylvania, is a moderately hot summer month, with temperature in the range of an average high of 81.7°F (27.6°C) and an average low of 59.2°F (15.1°C). The warmest month is July, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 59.2°F (15.1°C). The average heat index in July is computed to be a hot 87.8°F (31°C). Weather in July »

Weather in August

August, the last month of the summer in Williamsport, is another warm month, with an average temperature fluctuating between 57.2°F (14°C) and 79.2°F (26.2°C). In Williamsport, Pennsylvania, the average high-temperature in August is essentially the same as in July - a still warm 79.2°F (26.2°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Williamsport, Pennsylvania, with temperature in the range of an average high of 72.1°F (22.3°C) and an average low of 51.4°F (10.8°C). In Williamsport, the average high-temperature in September slightly decreases from a moderately hot 79.2°F (26.2°C) in August to a pleasant 72.1°F (22.3°C). Weather in September »

Weather in October

October, the same as September, in Williamsport, Pennsylvania, is another mild autumn month, with temperature in the range of an average high of 59.4°F (15.2°C) and an average low of 42.6°F (5.9°C). In October, the average high-temperature decreases from a pleasant 72.1°F (22.3°C) in September to a mild 59.4°F (15.2°C). Weather in October »

Weather in November

November, the last month of the autumn in Williamsport, is another chilly month, with an average temperature fluctuating between 46.2°F (7.9°C) and 32.4°F (0.2°C). In Williamsport, the average high-temperature in November drops from a mild 59.4°F (15.2°C) in October to a frosty 46.2°F (7.9°C). Weather in November »

Weather in December

December, the first month of the winter in Williamsport, is still a cold month, with temperature in the range of an average high of 36.7°F (2.6°C) and an average low of 26.6°F (-3°C). In Williamsport, the average high-temperature in December decreases from a frosty 46.2°F (7.9°C) in November to a wintry 36.7°F (2.6°C). Weather in December »
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FAQ

What is the coldest month in Williamsport?

The coldest month in Williamsport is January, with an average high-temperature of 30.6°F (-0.8°C) and an average low-temperature of 18.9°F (-7.3°C).

How many days does it rain in Williamsport?

Throughout the year, in Williamsport, Pennsylvania, there are 145.2 rainfall days, and 16.57" (421mm) of precipitation is accumulated.

When does it snow in Williamsport?

January through April, October through December are months with snowfall in Williamsport, Pennsylvania.

How much does it snow in Williamsport?

Throughout the year, in Williamsport, Pennsylvania, there are 39.1 snowfall days, and 7.56" (192mm) of snow is accumulated.

What are the months with the least sunshine in Williamsport?

January and February, with an average of 3.7h of sunshine, are months with the least sunshine in Williamsport.

When is the lowest UV index in Williamsport?

The months with the lowest UV index in Williamsport, Pennsylvania, are January through March, October through December, with an average maximum UV index of 2.

What is the most humid month in Williamsport?

February is the most humid month in Williamsport, Pennsylvania, with an average relative humidity of 84%.

What is the snowiest month in Williamsport?

February is the month with the most snowfall. Snow falls for 10.1 days and accumulates 2.28" (58mm) of snow.

When is Daylight Saving Time (DST) in Williamsport?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Williamsport?

April and July, with an average relative humidity of 77%, are the least humid months.

What is the rainiest month in Williamsport?

The month with the most rainfall in Williamsport, Pennsylvania, is April, when the rain falls for 15 days and typically aggregates up to 1.93" (49mm) of precipitation.

When it does not snow in Williamsport?

May through September are months without snowfall.

When are the longest days in Williamsport?

With an average of 15h and 6min of daylight, June has the longest days of the year in Williamsport.

What is the warmest month in Williamsport?

The warmest month in Williamsport, Pennsylvania, is July, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 59.2°F (15.1°C).

What month has the most sunshine in Williamsport?

July has the most sunshine of the year, with an average of 10.1h of sunshine.

What is the month with the highest UV index in Williamsport?

With an average maximum UV index of 6, July is the month with the highest UV index.

What is the driest month in Williamsport?

November is the month with the least rainfall. Rain falls for 8.6 days and accumulates 0.94" (24mm) of precipitation.

What is the month with the shortest days in Williamsport?

The month with the shortest days is December, with an average of 9h and 16min of daylight.

Average temperature
Williamsport, PA

Average temperature - Williamsport, PA

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).

The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure
Williamsport, PA

Average pressure - Williamsport, PA

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed
Williamsport, PA

Average wind speed - Williamsport, PA

The windiest months (with the highest average wind speed) are January, March and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity
Williamsport, PA

Average humidity - Williamsport, PA

The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are April and July (77%).

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Average rainfall
Williamsport, PA

Average rainfall - Williamsport, PA

The wettest month (with the highest rainfall) is April (1.93").
The driest month (with the least rainfall) is November (0.94").

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Average rainfall days
Williamsport, PA

Average rainfall days - Williamsport, PA

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (7.5 days).

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Average snowfall
Williamsport, PA

Average snowfall - Williamsport, PA

The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Williamsport, PA

Average snowfall days - Williamsport, PA

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Williamsport, PA

Average daylight / Average sunshine - Williamsport, PA

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 16min).

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).

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Average sunshine days
Williamsport, PA

Average sunshine days - Williamsport, PA

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (11.8 days).

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Average UV index
Williamsport, PA

Average UV index - Williamsport, PA

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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