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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, like December, in Fullerton, Pennsylvania, is an icy winter month, with an average temperature varying between 34°F (1.1°C) and 21.6°F (-5.8°C). Temperature readings reach their annual highs in January, averaging 34°F (1.1°C) and a minimum average of 21.6°F (-5.8°C). Weather in January »
Weather in February
February, the last month of the winter in Fullerton, is also an icy month, with temperature in the range of an average high of 37.8°F (3.2°C) and an average low of 23.4°F (-4.8°C). Transitioning into February, Fullerton records an average high-temperature of a still cold 37.8°F (3.2°C), almost identical to January's 34°F (1.1°C). Weather in February »
Weather in March
March, the first month of the spring in Fullerton, is a chilly month, with an average temperature fluctuating between 30°F (-1.1°C) and 45.9°F (7.7°C). March witnesses a minor rise in the average high-temperature, transitioning from an icy 37.8°F (3.2°C) in February to a chilly 45.9°F (7.7°C). Weather in March »
Weather in April
April in Fullerton, Pennsylvania, is a mild spring month, with an average temperature varying between 58.3°F (14.6°C) and 40.5°F (4.7°C). April's arrival signals an increase in average high-temperatures, moving from March's frosty 45.9°F (7.7°C) to a mild 58.3°F (14.6°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Fullerton, Pennsylvania, with an average temperature ranging between max 69.4°F (20.8°C) and min 50.5°F (10.3°C). The shift from April to May sees an increase in the average high-temperature, transitioning from a moderate 58.3°F (14.6°C) to an agreeable 69.4°F (20.8°C). Weather in May »
Weather in June
June, the first month of the summer in Fullerton, is a warm month, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 77.5°F (25.3°C). June brings a slight elevation in the average high-temperature, transitioning from May's agreeable 69.4°F (20.8°C) to a moderately hot 77.5°F (25.3°C). Weather in June »
Weather in July
July, like June, in Fullerton, Pennsylvania, is a moderately hot summer month, with an average temperature ranging between max 83.8°F (28.8°C) and min 63.5°F (17.5°C). The warmest period is July, when temperatures fluctuate between an average high of 83.8°F (28.8°C) and a low of 63.5°F (17.5°C). July's mean heat index is computed to be a tropical 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Fullerton, is another warm month, with an average temperature varying between 81°F (27.2°C) and 61.7°F (16.5°C). Fullerton signifies an average high-temperature of a still warm 81°F (27.2°C) in August, closely mirroring the 83.8°F (28.8°C) of July. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Fullerton, Pennsylvania, with an average temperature varying between 74.3°F (23.5°C) and 55°F (12.8°C). September marks a gentle change in average high-temperature, declining from August's 81°F (27.2°C) to a still warm 74.3°F (23.5°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Fullerton, Pennsylvania, with an average temperature varying between 62.1°F (16.7°C) and 46.2°F (7.9°C). A moderate decline in the average high-temperature is seen during October, decreasing from a moderately hot 74.3°F (23.5°C) in September to an enjoyable 62.1°F (16.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Fullerton, Pennsylvania, with temperature in the range of an average high of 49.8°F (9.9°C) and an average low of 35.4°F (1.9°C). November's onset brings a reduction in the average high-temperature, from a comfortable 62.1°F (16.7°C) in October to a frosty 49.8°F (9.9°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Fullerton, Pennsylvania, with an average temperature varying between 40.1°F (4.5°C) and 28.9°F (-1.7°C). The onset of December results in a decrease in the average high-temperature, receding from a frosty 49.8°F (9.9°C) in November to a cold 40.1°F (4.5°C). Weather in December »
Updated: Aug 23, 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 month?
Fullerton's temperature records reveal January as the coldest month, marked by average highs of 34°F (1.1°C) and lows of 21.6°F (-5.8°C).
How much does it rain?
Throughout the year, there are 145.1 rainfall days, and 27.24" (692mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
Throughout the year, there are 20.4 snowfall days, and 13.82" (351mm) of snow is accumulated.
What are the months with the lowest UV index?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the most humid month?
February is the most humid month, with an average relative humidity of 82%.
What is the month with the least sunshine?
The month with the least sunshine is February, with an average of 4.4h of sunshine.
When does it snow the most?
March is the month with the most snowfall. Snow falls for 5.3 days and accumulates 4.37" (111mm) 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?
The months with the lowest humidity are April and July, with an average relative humidity of 76%.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 0min of daylight.
What is the month with the highest UV index?
June and July, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest in Fullerton?
In Fullerton, temperatures reach their average annual highs in July, measuring 83.8°F (28.8°C) and a minimum average of 63.5°F (17.5°C).
What is the wettest month?
July is the month with the most rainfall. Rain falls for 15.7 days and accumulates 3.03" (77mm) of precipitation.
What month has the most sunshine?
With an average of 10.4h of sunshine, July has the most sunshine of the year.
What is the driest month?
September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.61" (41mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Fullerton, PA
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34°F).
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Fullerton, PA
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.05"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:
30.09"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
Fullerton, PA
- Average wind speed in January:
7.9mph - Average wind speed in February:
7.8mph - Average wind speed in March:
8.1mph - Average wind speed in April:
7.9mph - Average wind speed in May:
6.2mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
5mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.6mph - Average wind speed in November:
7mph - Average wind speed in December:
7.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Fullerton, PA
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall
Fullerton, PA
- Average rainfall in January:
1.81" - Average rainfall in February:
1.73" - Average rainfall in March:
2.17" - Average rainfall in April:
2.44" - Average rainfall in May:
2.76" - Average rainfall in June:
2.32"
- Average rainfall in July:
3.03" - Average rainfall in August:
2.68" - Average rainfall in September:
1.61" - Average rainfall in October:
2.2" - Average rainfall in November:
2.17" - Average rainfall in December:
2.32"
The wettest month (with the highest rainfall) is July (3.03").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days
Fullerton, PA
- Average rainfall days in January:
6.7 days - Average rainfall days in February:
7.9 days - Average rainfall days in March:
11.7 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
15.6 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
8.3 days - Average rainfall days in December:
9.2 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall
Fullerton, PA
- Average snowfall in January:
3.15" - Average snowfall in February:
3.11" - Average snowfall in March:
4.37" - 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 (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Fullerton, PA
- Average snowfall days in January:
5 days - Average snowfall days in February:
6.6 days - Average snowfall days in March:
5.3 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:
0.1 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
2.5 days
The month with the highest number of snowfall days is February (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Fullerton, 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 3min - 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 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - 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 18min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days
Fullerton, PA
- Average sunshine days in January:
20.5 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
13.4 days - Average sunshine days in August:
14 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
17 days - Average sunshine days in November:
20.2 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is January (20.5 days).
The month with the least sunshine days is May (11.8 days).
Average UV index
Fullerton, PA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Fullerton, PA
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility
Fullerton, PA
The months with the highest visibility are April, July and November (6mi).
The months with the lowest visibility are January, February, March, May, June, August, September, October and December (5mi).
Fullerton, Pennsylvania, USA
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