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
A mild drop in Rismiller's average high-temperature is observed in September, transitioning from a moderately hot 80.2°F (26.8°C) in August to a still warm 73.9°F (23.3°C). In September, the average low-temperature records at a cool 54.3°F (12.4°C) during the nights.Humidity
In Rismiller, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.6 days and typically collects 1.02" (26mm) of precipitation.Snowfall
In Rismiller, snow does not fall in June through September.Daylight
In Rismiller, Pennsylvania, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:28 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:44 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Take precautions - Protection against sunburn is recommended. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Rismiller have in September?
When are sunrise and sunset in September in Rismiller?
How many hours of sunshine does Rismiller have in September?
How high is the UV index in September?
Average temperature in September
Rismiller, PA
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Rismiller, PA
- Average pressure in September: 30.06"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
Rismiller, PA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Rismiller, PA
- Average humidity in September: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Rismiller, PA
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is July (2.32").
The driest month (with the least rainfall) is September (1.02").
Average rainfall days in September
Rismiller, PA
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Rismiller, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rismiller, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rismiller, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Rismiller, PA
- Average sunshine days in September: 17 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is July (13 days).
Average UV index in September
Rismiller, PA
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Rismiller, PA
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Rismiller, 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).
Rismiller, Pennsylvania, USA
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