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
The start of September involves a subtle temperature drop, shifting from a warm 77.5°F (25.3°C) in August to a pleasant 70.7°F (21.5°C). Riggs experiences an average nighttime temperature of 50.2°F (10.1°C) in the month of September.Humidity
In Riggs, the average relative humidity in September is 81%.Rainfall
In Riggs, in September, during 13.1 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, in Riggs, there are 164.7 rainfall days, and 24.09" (612mm) of precipitation is accumulated.Snowfall
In Riggs, Pennsylvania, snow does not fall in June through September.Daylight
In Riggs, the average length of the day in September is 12h and 28min.On the first day of September in Riggs, Pennsylvania, sunrise is at 6:32 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:49 pm EDT.
Sunshine
The average sunshine in September in Riggs is 8.4h.UV index
In September, the average daily maximum UV index in Riggs is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 3 during September translates into the following guidance:
Act with care - The suggestion to avoid sunburn is emphasized. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What is the average September temperature in Riggs?
What is the average humidity in September in Riggs?
How many days does it rain in September in Riggs?
When it does not snow in Riggs?
Does it snow in Riggs in September?
What is the average length of the day in September in Riggs?
When are sunrise and sunset in September in Riggs?
How long on average sun shines in September in Riggs?
How high is the UV index in September in Riggs?
Average temperature in September
Riggs, PA
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in September: 50.2°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in September
Riggs, PA
- Average pressure in September: 30.07"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Riggs, PA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Riggs, PA
- Average humidity in September: 81%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, June and July (78%).
Average rainfall in September
Riggs, PA
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in September
Riggs, PA
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Riggs, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Riggs, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Riggs, PA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 12min).
Average sunshine days in September
Riggs, PA
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is September (14.4 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in September
Riggs, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Riggs, PA
- Average cloud cover in September: 43
The months with the most cloud cover are January, February and December (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility in September
Riggs, PA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Riggs, Pennsylvania, USA
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