Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival signals a moderate reduction in the average high-temperature, easing from a warm 80.2°F (26.8°C) in August to a pleasant 73.2°F (22.9°C). Throughout September, the average low-temperature in Northumberland, Pennsylvania, records at a fresh 53.4°F (11.9°C).Humidity
In Northumberland, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall in Northumberland is September, when the rain falls for 9.2 days and typically collects 0.75" (19mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in September in Northumberland is 12h and 27min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:39 pm. On the last day of September, in Northumberland, sunrise is at 7:03 am and sunset at 6:50 pm EDT.
Sunshine
The average sunshine in September in Northumberland is 8.8h.UV index
In Northumberland, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What are the temperatures in Northumberland in September?
What is the average humidity in September in Northumberland?
What is the driest month in Northumberland?
How many days does it rain in September in Northumberland?
When it does not snow in Northumberland?
What is the average length of the day in September in Northumberland?
What time are sunrise and sunset in September in Northumberland?
How many hours of sunshine does Northumberland have in September?
How high is the UV index in September in Northumberland?
Average temperature in September
Northumberland, PA
- Average high temperature in September: 73.2°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
Northumberland, PA
- Average pressure in September: 30.07"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Northumberland, PA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Northumberland, PA
- Average humidity in September: 79%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are March and April (76%).
Average rainfall in September
Northumberland, PA
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is July (1.65").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in September
Northumberland, PA
- Average rainfall days in September: 9.2 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in September
Northumberland, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Northumberland, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Northumberland, PA
- Average daylight in September: 12h and 3min
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 18min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 12min).
Average sunshine days in September
Northumberland, PA
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is April (13.4 days).
Average UV index in September
Northumberland, PA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Northumberland, PA
- Average cloud cover in September: 37
The months with the most cloud cover are February and December (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Northumberland, PA
- Average visibility in September: 5mi
The months with the highest visibility are March, April, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and October (5mi).
Northumberland, Pennsylvania, USA
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