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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 Williamson, Pennsylvania, with an average temperature ranging between max 35.4°F (1.9°C) and min 22.5°F (-5.3°C). In Williamson, Pennsylvania, the month of January is known for its lowest average temperatures, reaching a high of 35.4°F (1.9°C) and a low of 22.5°F (-5.3°C). Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Williamson, Pennsylvania, with an average temperature ranging between min 24.6°F (-4.1°C) and max 39.9°F (4.4°C). Transitioning into February, Williamson experiences an average high-temperature of a still wintry 39.9°F (4.4°C), marking a minor shift from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Williamson, is a frosty month, with an average temperature varying between 32°F (0°C) and 48.7°F (9.3°C). March's arrival signals a subtle increase in average high-temperatures, moving from February's icy 39.9°F (4.4°C) to a chilly 48.7°F (9.3°C). Weather in March »
Weather in April
April in Williamson, Pennsylvania, is a comfortable spring month, with an average temperature varying between 41.7°F (5.4°C) and 61.3°F (16.3°C). Williamson in April experiences an increase in the average high-temperature, moving from March's chilly 48.7°F (9.3°C) to an enjoyable 61.3°F (16.3°C). Weather in April »
Weather in May
May, the last month of the spring in Williamson, is an agreeable month, with an average temperature ranging between max 71.2°F (21.8°C) and min 51.6°F (10.9°C). As Williamson enters May, the average high-temperature increases from the an enjoyable 61.3°F (16.3°C) of April to a pleasant 71.2°F (21.8°C). Weather in May »
Weather in June
June, the first month of the summer in Williamson, is a moderately hot month, with an average temperature ranging between min 58.6°F (14.8°C) and max 79.5°F (26.4°C). The shift into June is marked by a modest rise in the average high-temperature, moving from May's agreeable 71.2°F (21.8°C) to a moderately hot 79.5°F (26.4°C). Weather in June »
Weather in July
July, like June, in Williamson, Pennsylvania, is a moderately hot summer month, with an average temperature ranging between max 84.4°F (29.1°C) and min 62.6°F (17°C). With average temperatures fluctuating between a high of 84.4°F (29.1°C) and a low of 62.6°F (17°C), July stands out as the warmest month. Throughout July, the heat index is calculated to be a hot 93.2°F (34°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Williamson, Pennsylvania, with temperature in the range of an average low of 61.5°F (16.4°C) and an average high of 81.9°F (27.7°C). Transitioning from July to August, Williamson observes an average high-temperature of a still moderately hot 81.9°F (27.7°C), differing subtly from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Williamson, is still a warm month, with an average temperature fluctuating between 74.8°F (23.8°C) and 55.6°F (13.1°C). A mild shift in the average high-temperature occurs in September, reducing from a moderately hot 81.9°F (27.7°C) in August to a still warm 74.8°F (23.8°C). Weather in September »
Weather in October
October, like September, in Williamson, Pennsylvania, is another refreshing autumn month, with temperature in the range of an average high of 63.3°F (17.4°C) and an average low of 46°F (7.8°C). The arrival of October corresponds with a shift in temperature, down from a warm 74.8°F (23.8°C) in September to a comfortable 63.3°F (17.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Williamson, Pennsylvania, with an average temperature varying between 34.7°F (1.5°C) and 50.5°F (10.3°C). With the beginning of November, the average high-temperature shows a decrease, transitioning from a refreshing 63.3°F (17.4°C) in October to a fresh 50.5°F (10.3°C). Weather in November »
Weather in December
December, the first month of the winter in Williamson, is also an icy month, with an average temperature varying between 41.2°F (5.1°C) and 28.9°F (-1.7°C). The onset of December results in a decrease in the average high-temperature, receding from a fresh 50.5°F (10.3°C) in November to a cold 41.2°F (5.1°C). Weather in December »
Updated: Jun 4, 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 month is the coldest?
January, noted for its average high-temperature of 35.4°F (1.9°C) and an average low-temperature of 22.5°F (-5.3°C), is considered the coldest month.
What is the driest month?
January is the month with the least rainfall. Rain falls for 9.2 days and accumulates 1.85" (47mm) of precipitation.
How much does it rain?
In Williamson, during the entire year, the rain falls for 161.8 days and collects up to 28.07" (713mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 8.1 days and typically aggregates up to 4.53" (115mm) of snow.
How much does it snow?
Throughout the year, there are 26.6 snowfall days, and 14.69" (373mm) of snow is accumulated.
What is the month 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 are the most humid months?
February, May, October and December, with an average relative humidity of 79%, are most humid months.
What is the month with the least sunshine?
February has the least sunshine of the year, with an average of 4.6h of sunshine.
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?
April and July, with an average relative humidity of 75%, are the least humid months.
What is the wettest month?
May is the month with the most rainfall. Rain falls for 18.8 days and accumulates 3.15" (80mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When is the highest UV index?
The months with the highest UV index in Williamson are May through July, with an average maximum UV index of 6.
When are the longest days?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What is the warmest month?
July is the warmest month in Williamson, with an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 62.6°F (17°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.5h of sunshine.
What is the month with the shortest days?
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Williamson, PA
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (35.4°F).
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure
Williamson, PA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Williamson, PA
- Average wind speed in January:
7.7mph - Average wind speed in February:
7.6mph - Average wind speed in March:
7.5mph - Average wind speed in April:
7.5mph - Average wind speed in May:
5.8mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
4.5mph - Average wind speed in August:
4.5mph - Average wind speed in September:
5mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.6mph - Average wind speed in December:
7mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity
Williamson, PA
The months with the highest relative humidity are February, May, October and December (79%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall
Williamson, PA
- Average rainfall in January:
1.85" - Average rainfall in February:
1.93" - Average rainfall in March:
2.17" - Average rainfall in April:
2.68" - Average rainfall in May:
3.15" - Average rainfall in June:
2.56"
- Average rainfall in July:
2.83" - Average rainfall in August:
2.76" - Average rainfall in September:
1.97" - Average rainfall in October:
2.28" - Average rainfall in November:
1.89" - Average rainfall in December:
2.01"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days
Williamson, PA
- Average rainfall days in January:
9.2 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
16.5 days - Average rainfall days in May:
18.8 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
16.9 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
14.1 days - Average rainfall days in October:
12.5 days - Average rainfall days in November:
9 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is November (9 days).
Average snowfall
Williamson, PA
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Williamson, PA
- Average snowfall days in January:
8.1 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
0.6 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:
0.1 days - Average snowfall days in November:
0.7 days - Average snowfall days in December:
4.7 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Williamson, 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:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 3min - Average sunshine in May:
8h and 4min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
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 36min).
Average sunshine days
Williamson, PA
- Average sunshine days in January:
16.4 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
12.2 days - Average sunshine days in August:
12.6 days - Average sunshine days in September:
14.4 days - Average sunshine days in October:
16.8 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.4 days).
Average UV index
Williamson, PA
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Williamson, PA
The months with the most cloud cover are January, February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Williamson, PA
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Williamson, Pennsylvania, USA
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