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
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a moderately hot 79.9°F (26.6°C) in August to an agreeable 72.5°F (22.5°C). The average temperature in Clarence drops to a fresh 52.2°F (11.2°C) during the night in the month of September.Humidity
In September, the average relative humidity is 80%.Rainfall
In September, the rain falls for 12.2 days. Throughout September, 1.89" (48mm) of precipitation is accumulated. Throughout the year, there are 158.7 rainfall days, and 23.74" (603mm) of precipitation is accumulated.Snowfall
In Clarence, Pennsylvania, snow does not fall in June through September.Daylight
In September, the average length of the day in Clarence is 12h and 28min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:54 pm EDT.
Sunshine
In September, the average sunshine in Clarence is 8.4h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Clarence?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in Clarence in September?
What is the average length of the day in September in Clarence?
When are sunrise and sunset in September?
How many hours of sunshine does Clarence have in September?
How high is the UV index in September?
Average temperature in September
Clarence, PA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Clarence, 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 (29.95"Hg).
Average wind speed in September
Clarence, PA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Clarence, PA
- Average humidity in September: 80%
The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is July (76%).
Average rainfall in September
Clarence, PA
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in September
Clarence, PA
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (18.4 days).
The months with the least rainy days are January and February (8.3 days).
Average snowfall in September
Clarence, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Clarence, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Clarence, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Clarence, PA
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in September
Clarence, PA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Clarence, PA
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Clarence, 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).
Clarence, Pennsylvania, USA
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