September weather forecastSmethport, PA
September
Weather in September
As the gateway between summer and autumn, September begins with notable changes in Smethport's weather. The decrease in temperatures and sunshine duration signifies the advent of cooler months. With the return of the prospect of snowfall, albeit still at zero inches average, it becomes evident that the grip of summer has begun to relax. The shorter daylight hours and lower temperatures herald the shift to the fall season.Temperature
The commencement of September indicates a gentle shift in the average high-temperature, receding from August's moderately hot 76.6°F (24.8°C) to an agreeable 70.2°F (21.2°C). The nighttime temperature in Smethport dips to a frosty 49.8°F (9.9°C) on average during September.Humidity
In September, the average relative humidity is 81%.Rainfall
September is the month with the least rainfall. Rain falls for 13.3 days and accumulates 1.89" (48mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:56 pm EDT.
Sunshine
The average sunshine in September is 8h.UV index
In Smethport, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, an average UV index of 3 transforms into the following instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Smethport, PA
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (56.5°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in September
Smethport, 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
Smethport, PA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Smethport, PA
- Average humidity in September: 81%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are May, June and July (79%).
Average rainfall in September
Smethport, PA
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in September
Smethport, PA
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in September
Smethport, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (10.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Smethport, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Smethport, PA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The months with the least sunshine are January and December (Average sunshine: 2h and 30min).
Average sunshine days in September
Smethport, PA
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is September (14.9 days).
The month with the least sunshine days is February (8.1 days).
Average UV index in September
Smethport, 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 and December (UV index 1).
Average cloud cover in September
Smethport, PA
- Average cloud cover in September: 47
The month with the most cloud cover is January (Cloud cover 78).
The months with the least cloud cover are July and August (Cloud cover 43).
Average visibility in September
Smethport, PA
- Average visibility in September: 4mi
The months with the highest visibility are March, April, May, June, July, October and November (5mi).
The months with the lowest visibility are January, February, August, September and December (4mi).
