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
As September commences in Portage, the average high-temperature subtly reduces, transitioning from a moderately hot 78.3°F (25.7°C) in August to a pleasant 72.5°F (22.5°C). An average nighttime temperature of 54°F (12.2°C) is witnessed throughout September.Humidity
The average relative humidity in September is 79%.Rainfall
In Portage, during September, the rain falls for 14.4 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Portage, during the entire year, the rain falls for 158.4 days and collects up to 29.88" (759mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 7:08 am and sunset at 8:15 pm. On the last day of September, in Portage, sunrise is at 7:39 am and sunset at 7:25 pm EDT.
Sunshine
In Portage, the average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Portage have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September in Portage?
How high is the UV index in September in Portage?
Average temperature in September
Portage, MI
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
Portage, MI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Portage, MI
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in September
Portage, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Portage, MI
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is November (1.73").
Average rainfall days in September
Portage, MI
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in September
Portage, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Portage, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Portage, MI
- 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Portage, MI
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (9.8 days).
Average UV index in September
Portage, MI
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Portage, MI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Portage, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, October and November (6mi).
The months with the lowest visibility are January, February, August, September and December (5mi).
Portage, Michigan, USA
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