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
Gwynneville's September reports an average high-temperature of a still warm 75.6°F (24.2°C), exhibiting a minor difference from August. During September, Gwynneville witnesses a consistent average low-temperature of 57.9°F (14.4°C).Humidity
In September, the average relative humidity is 77%.Rainfall
In Gwynneville, in September, it is raining for 12.9 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 153.4 rainfall days, and 26.81" (681mm) of precipitation is accumulated.Snowfall
In Gwynneville, Indiana, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 7:11 am and sunset at 8:13 pm. On the last day of September, sunrise is at 7:38 am and sunset at 7:26 pm EDT.
Sunshine
In Gwynneville, the average sunshine in September is 8.3h.UV index
In Gwynneville, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 during September leads to these advisories:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September in Gwynneville?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Gwynneville, IN
- Average high temperature in September: 75.6°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in September: 57.9°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in September
Gwynneville, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Gwynneville, IN
- Average wind speed in September: 6.4mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Gwynneville, IN
- Average humidity in September: 77%
The months with the highest relative humidity are January, July and December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Gwynneville, IN
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is February (1.69").
Average rainfall days in September
Gwynneville, IN
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (8 days).
Average snowfall in September
Gwynneville, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Gwynneville, IN
- 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 May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Gwynneville, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Gwynneville, IN
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in September
Gwynneville, IN
- Average UV index in September: 4
The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Gwynneville, IN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Gwynneville, IN
- 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).
Gwynneville, Indiana, USA
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