September weather forecastLenni, PA
September
Weather in September
The first month of the autumn, September, is still a warm month in Lenni, Pennsylvania, with an average temperature varying between 76.3°F (24.6°C) and 60.1°F (15.6°C).Temperature
With the onset of September, Lenni's average high-temperature slightly adjusts, moderately receding from August's moderately hot 83.1°F (28.4°C) to a still warm 76.3°F (24.6°C). Lenni records an average low-temperature of 60.1°F (15.6°C) throughout the month of September.Humidity
The average relative humidity in September is 76%.Rainfall
In September, in Lenni, the rain falls for 13.6 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. In Lenni, during the entire year, the rain falls for 166.6 days and collects up to 35.59" (904mm) of precipitation.Snowfall
In Lenni, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:32 pm. On the last day of September, in Lenni, sunrise is at 6:57 am and sunset at 6:45 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 5 in September translates into these instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lenni, PA
- Average high temperature in September: 76.3°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 (37°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in September
Lenni, PA
- Average pressure in September: 30.05"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 September
Lenni, PA
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Lenni, PA
- Average humidity in September: 76%
The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Lenni, PA
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.36").
Average rainfall days in September
Lenni, PA
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in September
Lenni, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Lenni, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lenni, PA
- Average daylight in September: 12h and 24min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Lenni, PA
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (10 days).
Average UV index in September
Lenni, PA
- Average UV index in September: 5
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, November and December (UV index 2).
Average cloud cover in September
Lenni, PA
- Average cloud cover in September: 39
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Lenni, PA
- Average visibility in September: 5mi
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).
