September weather forecastPorter, IN
September
Weather in September
September, the first month of the autumn in Porter, is also an agreeable month, with an average temperature varying between 71.8°F (22.1°C) and 58.6°F (14.8°C).Temperature
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a warm 77.4°F (25.2°C) in August to an agreeable 71.8°F (22.1°C). In September, Porter's temperature tends to fall to an average low of 58.6°F (14.8°C) during the night.Humidity
The average relative humidity in September is 78%.Rainfall
In September, the rain falls for 14 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. Throughout the year, there are 155.2 rainfall days, and 25.24" (641mm) of precipitation is accumulated.Snowfall
In Porter, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:15 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:31 pm CDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 4 in September transforms into this advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Porter, IN
- Average high temperature in September: 71.8°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in September
Porter, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Porter, IN
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is January (12mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in September
Porter, IN
- Average humidity in September: 78%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Porter, IN
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is June (3.54").
The driest months (with the least rainfall) are January and December (1.14").
Average rainfall days in September
Porter, IN
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in September
Porter, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Porter, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Porter, IN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Porter, IN
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in September
Porter, IN
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Porter, IN
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Porter, IN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
