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
September reveals a small adjustment in temperature, transitioning from an average high of a warm 76.8°F (24.9°C) in August to an agreeable 68.9°F (20.5°C). The average nighttime temperature lowers to a chilly 49.1°F (9.5°C) throughout September.Humidity
In Port Arthur, the average relative humidity in September is 80%.Rainfall
In September, the rain falls for 12.2 days. Throughout September, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 128.5 rainfall days, and 23.94" (608mm) of precipitation is accumulated.Snowfall
In Port Arthur, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:27 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:46 pm CDT.
Sunshine
In September, the average sunshine is 8.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. It's recommended to limit sun exposure when its radiation is at its peak during midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Port Arthur in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in Port Arthur in September?
How many hours of daylight does Port Arthur have in September?
When is the sunrise / sunset in September in Port Arthur?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Port Arthur, WI
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (18.1°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in September
Port Arthur, WI
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Port Arthur, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Port Arthur, WI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Port Arthur, WI
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in September
Port Arthur, WI
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in September
Port Arthur, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (7.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Port Arthur, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Port Arthur, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The months with the least sunshine are January and February (Average sunshine: 2h and 36min).
Average sunshine days in September
Port Arthur, WI
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is October (16 days).
The months with the least sunshine days are February and April (10 days).
Average UV index in September
Port Arthur, WI
- Average UV index in September: 4
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
Port Arthur, WI
- Average cloud cover in September: 40
The months with the most cloud cover are January and February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in September
Port Arthur, WI
- Average visibility in September: 5mi
The months with the highest visibility are May and June (6mi).
The months with the lowest visibility are January, February and December (4mi).
Port Arthur, Wisconsin, USA
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