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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 Norristown, Pennsylvania, is an icy winter month, with an average temperature varying between 24.3°F (-4.3°C) and 36.7°F (2.6°C). The coldest period is January, when temperatures fluctuate between an average high of 36.7°F (2.6°C) and a low of 24.3°F (-4.3°C). Weather in January »
Weather in February
February, the last month of the winter in Norristown, is another cold month, with an average temperature ranging between min 26.1°F (-3.3°C) and max 39.7°F (4.3°C). February's arrival registers an average high-temperature of a still wintry 39.7°F (4.3°C), closely aligning with the temperature of the previous month. Weather in February »
Weather in March
March, the first month of the spring in Norristown, is a chilly month, with temperature in the range of an average high of 48.6°F (9.2°C) and an average low of 33.4°F (0.8°C). March's onset is marked by a subtle temperature increase, moving from a cold 39.7°F (4.3°C) in February to a chilly 48.6°F (9.2°C). Weather in March »
Weather in April
April in Norristown, Pennsylvania, is an enjoyable spring month, with an average temperature varying between 43.7°F (6.5°C) and 60.8°F (16°C). The start of April signals an increase in the average high-temperature, moving from a chilly 48.6°F (9.2°C) in March to a comfortable 60.8°F (16°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Norristown, Pennsylvania, with an average temperature ranging between max 71.4°F (21.9°C) and min 53.4°F (11.9°C). With the onset of May, Norristown experiences a temperature shift, with the average high-temperature moving from a refreshing 60.8°F (16°C) in April to a pleasant 71.4°F (21.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Norristown, Pennsylvania, with an average temperature fluctuating between 61.5°F (16.4°C) and 79.5°F (26.4°C). June's arrival signals a subtle increase in average high-temperatures, moving from May's agreeable 71.4°F (21.9°C) to a warm 79.5°F (26.4°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Norristown, Pennsylvania, with temperature in the range of an average low of 67.5°F (19.7°C) and an average high of 85.6°F (29.8°C). Norristown's July weather reaches an average high of 85.6°F (29.8°C) and an average low of 67.5°F (19.7°C), making it the warmest month. The heat index for July is calculated to be 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 Norristown, Pennsylvania, with an average temperature ranging between min 66°F (18.9°C) and max 83.3°F (28.5°C). The shift into August uncovers an average high-temperature of a still moderately hot 83.3°F (28.5°C), subtly different from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Norristown, is also a moderately hot month, with an average temperature fluctuating between 76.1°F (24.5°C) and 59°F (15°C). September ushers in a minute temperature change, with average high-temperatures reducing from August's moderately hot 83.3°F (28.5°C) to a still warm 76.1°F (24.5°C). Weather in September »
Weather in October
October, like September, in Norristown, Pennsylvania, is another comfortable autumn month, with an average temperature varying between 63.7°F (17.6°C) and 48.7°F (9.3°C). Onset of October comes with a temperature decline, the average high falling from a moderately hot 76.1°F (24.5°C) in September to an enjoyable 63.7°F (17.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Norristown, Pennsylvania, with an average temperature ranging between max 51.6°F (10.9°C) and min 37.6°F (3.1°C). The beginning of November marks a decrease in the average high-temperature, transitioning from an enjoyable 63.7°F (17.6°C) in October to a fresh 51.6°F (10.9°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Norristown, Pennsylvania, with an average temperature fluctuating between 30.9°F (-0.6°C) and 42.6°F (5.9°C). A shift in Norristown's weather is observed as November turns into December, with the average high temperature reducing from a fresh 51.6°F (10.9°C) to a wintry 42.6°F (5.9°C). Weather in December »
Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
January is the month when Norristown experiences its coldest temperatures, averaging a high of 36.7°F (2.6°C) and a low of 24.3°F (-4.3°C).
How much does it rain?
Throughout the year, there are 138.2 rainfall days, and 15.59" (396mm) of precipitation is accumulated.
When does it snow?
January through March, May and December are months with snowfall.
How much does it snow in Norristown?
In Norristown, Pennsylvania, during the entire year, snow falls for 15.8 days and aggregates up to 2.13" (54mm) of snow.
When is the lowest UV index?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What are the most humid months?
February and October, with an average relative humidity of 79%, are most humid months.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 8.8 days and typically collects 0.91" (23mm) of precipitation.
When does it snow the most?
The months with the most snowfall are February and March, with an average 0.55" (14mm) of accumulated snow.
What is the month with the least sunshine?
The month with the least sunshine is February, with an average of 4.8h 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 72%, are the least humid months.
When it does not snow?
In Norristown, snow does not fall in April, June through November.
What is the month with the highest UV index?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days?
The month with the longest days is June, with an average of 15h and 0min of daylight.
What part of the year is the hottest?
With average temperatures fluctuating between a high of 85.6°F (29.8°C) and a low of 67.5°F (19.7°C), July stands out as the warmest month.
What is the rainiest month?
July is the month with the most rainfall. Rain falls for 15 days and accumulates 1.89" (48mm) of precipitation.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.7h of sunshine.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Norristown, 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 (36.7°F).
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure
Norristown, 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:
30.06"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
Norristown, PA
- Average wind speed in January:
8mph - Average wind speed in February:
8mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8.2mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.7mph - Average wind speed in November:
7.1mph - Average wind speed in December:
7.5mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity
Norristown, PA
The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (72%).
Average rainfall
Norristown, PA
- Average rainfall in January:
0.98" - Average rainfall in February:
0.91" - Average rainfall in March:
1.1" - Average rainfall in April:
1.34" - Average rainfall in May:
1.77" - Average rainfall in June:
1.42"
The wettest month (with the highest rainfall) is July (1.89").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days
Norristown, PA
- Average rainfall days in January:
7.8 days - Average rainfall days in February:
8.8 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
16 days - Average rainfall days in June:
14.2 days
- Average rainfall days in July:
15 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
10.8 days - Average rainfall days in October:
11 days - Average rainfall days in November:
7.4 days - Average rainfall days in December:
8.6 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is November (7.4 days).
Average snowfall
Norristown, PA
The months with the highest snowfall are February and March (0.55").
The months with the least snowfall are April, June, July, August, September, October and November (0").
Average snowfall days
Norristown, PA
- Average snowfall days in January:
5.2 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
2.6 days - Average snowfall days in April:
0 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:
0.5 days - Average snowfall days in December:
2.6 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Norristown, 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 5min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 2min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 0min
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 48min).
Average sunshine days
Norristown, PA
- Average sunshine days in January:
20.2 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
15.7 days - Average sunshine days in April:
14.9 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
13.6 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
17.3 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
20.5 days - Average sunshine days in December:
19.9 days
The month with the most sunshine days is November (20.5 days).
The months with the least sunshine days are May and June (12.8 days).
Average UV index
Norristown, 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, March, November and December (UV index 2).
Average cloud cover
Norristown, PA
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Norristown, PA
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Norristown, Pennsylvania, USA
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