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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a moderately hot 79.9°F (26.6°C) in August to a still warm 73.8°F (23.2°C). September's nights observe an average temperature of 55.4°F (13°C).Humidity
In Schaefferstown, Pennsylvania, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.2 days and typically collects 2.24" (57mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:48 pm EDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Take precautions - Protection against sunburn is recommended. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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?
What is the driest month in Schaefferstown?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Schaefferstown have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September in Schaefferstown?
Average temperature in September
Schaefferstown, PA
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in September
Schaefferstown, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Schaefferstown, PA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Schaefferstown, PA
- Average humidity in September: 80%
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Schaefferstown, PA
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is August (3.39").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Schaefferstown, PA
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Schaefferstown, PA
- Average snowfall in September: 0"
The month with the highest snowfall is March (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Schaefferstown, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Schaefferstown, 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 5min
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
Schaefferstown, PA
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in September
Schaefferstown, PA
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Schaefferstown, PA
- Average cloud cover in September: 38
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Schaefferstown, PA
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, June, July, November and December (6mi).
The months with the lowest visibility are February, May, August, September and October (5mi).
Schaefferstown, Pennsylvania, USA
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