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 sea temperature 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
Erie's weather, upon September's arrival, documents an average high-temperature of an agreeable 69.6°F (20.9°C), nearly identical to the prior month. An average low-temperature of 58.8°F (14.9°C) marks the nights throughout September.Humidity
The months with the lowest humidity are August through November, with an average relative humidity of 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 7.9 days and typically collects 0.35" (9mm) of precipitation.Snowfall
In Erie, snow does not fall in June through October.Ocean temperature
In Erie, in September, the average water temperature is 70°F (21.1°C).Note: In 70°F (21.1°C), swimming is not an enjoyable activity for most. As the temperature decreases from 69.8°F (21°C) to 59°F (15°C), it becomes harder to control breathing.
Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:46 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:03 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 4 in September leads to these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Notice! The Sun's UV exposure elevates with sand and water reflections.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What are the least humid months?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September in Erie?
When it does not snow?
What is the ocean temperature in September?
How many hours of daylight does Erie have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Erie, PA
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Erie, PA
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Erie, PA
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is January (13.5mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Erie, PA
- Average humidity in September: 78%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are August, September, October and November (78%).
Average rainfall in September
Erie, PA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is October (0.83").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Erie, PA
- Average rainfall days in September: 7.9 days
The month with the highest number of rainy days is August (11.7 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Erie, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Erie, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Erie, PA
- Average sea temperature in September: 70°F
The best month for swimming (with the highest average sea temperature) is August (75.1°F).
The coldest month (with the lowest average sea temperature) is February (32.5°F).
Average daylight in September /
Average sunshine in September
Erie, PA
- Average daylight in September: 12h and 3min
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 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Erie, PA
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is March (21.3 days).
The month with the least sunshine days is August (16.3 days).
Average UV index in September
Erie, PA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Erie, PA
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
Erie, PA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Erie, Pennsylvania, USA
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