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
In Portville, the average high-temperature in September slightly decreases from a warm 76.3°F (24.6°C) in August to a pleasant 69.6°F (20.9°C). In September, the average low-temperature is 49.5°F (9.7°C).Humidity
In September, the average relative humidity in Portville is 81%.Rainfall
September is the month with the least rainfall in Portville, New York. Rain falls for 15.4 days and accumulates 1.93" (49mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Portville, New York, is 12h and 28min.On the first day of September in Portville, sunrise is at 6:38 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:57 pm EDT.
Sunshine
The average sunshine in September in Portville is 8h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
FAQ
What is the temperature in September in Portville?
What is the average humidity in September in Portville?
What is the driest month in Portville?
How many days does it rain in September in Portville?
When it does not snow in Portville?
Does it snow in Portville in September?
What is the average length of the day in September in Portville?
What time are sunrise and sunset in September in Portville?
How long on average sun shines in September in Portville?
What is the UV index intensity in September in Portville?
Average temperature in September
Portville, NY
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in September
Portville, NY
- 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
Portville, NY
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Portville, NY
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (89%).
The months with the lowest relative humidity are May, June and July (79%).
Average rainfall in September
Portville, NY
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Portville, NY
- Average rainfall days in September: 15.4 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in September
Portville, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (10.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Portville, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (20.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Portville, NY
- Average daylight in September: 12h and 28min
The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 11min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in September
Portville, NY
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is September (12.4 days).
The month with the least sunshine days is February (5.9 days).
Average UV index in September
Portville, NY
- 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, February and December (UV index 1).
Average cloud cover in September
Portville, NY
- Average cloud cover in September: 47
The month with the most cloud cover is January (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 43).
Average visibility in September
Portville, NY
- 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).
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