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 signifies a gentle decline in Blue Knob's average high-temperature, easing from a warm 78.8°F (26°C) in August to a pleasant 72.1°F (22.3°C). Throughout September nights, Blue Knob experiences a consistent temperature average of 52.5°F (11.4°C).Humidity
The average relative humidity in September is 80%.Rainfall
In Blue Knob, in September, during 15.3 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Blue Knob, during the entire year, the rain falls for 162.4 days and collects up to 30" (762mm) of precipitation.Snowfall
In Blue Knob, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:45 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:57 pm EDT.
Sunshine
The average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. Around midday, solar radiation is most harmful; hence, exposure should be limited. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in Blue Knob in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Blue Knob have in September?
How high is the UV index in September?
Average temperature in September
Blue Knob, PA
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Blue Knob, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Blue Knob, PA
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Blue Knob, PA
- Average humidity in September: 80%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is July (77%).
Average rainfall in September
Blue Knob, PA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is November (1.65").
Average rainfall days in September
Blue Knob, PA
- Average rainfall days in September: 15.3 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (7.3 days).
Average snowfall in September
Blue Knob, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Blue Knob, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Blue Knob, PA
- Average daylight in September: 12h 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 September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Blue Knob, PA
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in September
Blue Knob, 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, February, March, October, November and December (UV index 2).
Average cloud cover in September
Blue Knob, PA
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Blue Knob, PA
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Blue Knob, Pennsylvania, USA
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