October weather forecastNorristown, PA
October
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).Temperature
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). During the nights in October, Norristown experiences a consistent average temperature of 48.7°F (9.3°C).Humidity
The months with the highest humidity are February and October, with an average relative humidity of 79%.Rainfall
In Norristown, during October, the rain falls for 11 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Norristown, during the entire year, the rain falls for 138.2 days and collects up to 15.59" (396mm) of precipitation.Snowfall
In Norristown, snow does not fall in April, June through November.Daylight
The average length of the day in October is 11h and 8min.On the first day of October, sunrise is at 6:58 am and sunset at 6:43 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 5:59 pm EDT.
Sunshine
The average sunshine in October is 5.5h.UV index
The average daily maximum UV index in October in Norristown is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: A daily maximum UV index of 3 in October translates into the following instructions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Norristown, PA
- Average high temperature in October: 63.7°F
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).
- Average low temperature in October: 48.7°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 in October
Norristown, PA
- Average pressure in October: 30.03"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 in October
Norristown, PA
- Average wind speed in October: 6.7mph
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 in October
Norristown, PA
- Average humidity in October: 79%
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 in October
Norristown, PA
- Average rainfall in October: 1.1"
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 in October
Norristown, PA
- Average rainfall days in October: 11 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 in October
Norristown, PA
- Average snowfall in October: 0"
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 in October
Norristown, PA
- Average snowfall days in October: 0 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 in October /
Average sunshine in October
Norristown, PA
- Average daylight in October: 11h and 6min
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 October: 5h and 30min
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 in October
Norristown, PA
- Average sunshine days in October: 18.2 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 in October
Norristown, PA
- Average UV index in October: 3
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 in October
Norristown, PA
- Average cloud cover in October: 42
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 in October
Norristown, PA
- Average visibility in October: 6mi
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).
