September weather forecastMendelssohn, PA
September
Weather in September
September, the first month of the autumn in Mendelssohn, is still a warm month, with an average temperature varying between 75.6°F (24.2°C) and 55.8°F (13.2°C).Temperature
September indicates a minor shift in the average high-temperature, from August's warm 81.9°F (27.7°C) to a still moderately hot 75.6°F (24.2°C). Throughout September, Mendelssohn registers a consistent average low-temperature of 55.8°F (13.2°C).Humidity
In September, the average relative humidity is 77%.Rainfall
September and November are months with the least rain in Mendelssohn when the rain falls for 9 days and typically aggregates up to 0.55" (14mm) of rain.Snowfall
June through September are months without snowfall in Mendelssohn.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:47 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:02 pm EDT.
Sunshine
The average sunshine in September in Mendelssohn is 8.6h.UV index
In September, the average daily maximum UV index in Mendelssohn is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mendelssohn, PA
- Average high temperature in September: 75.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Mendelssohn, PA
- Average pressure in September: 30.05"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
Mendelssohn, PA
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Mendelssohn, PA
- Average humidity in September: 77%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Mendelssohn, PA
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are September and November (0.55").
Average rainfall days in September
Mendelssohn, PA
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in September
Mendelssohn, PA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (1.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mendelssohn, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mendelssohn, 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 36min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Mendelssohn, PA
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in September
Mendelssohn, PA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Mendelssohn, PA
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Mendelssohn, PA
- Average visibility in September: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
