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
Swanington experiences a subtle adjustment in high-temperatures to a still warm 75°F (23.9°C) with the onset of September, maintaining near parity with August's 79.3°F (26.3°C). The nighttime temperature dips to a mild 56.8°F (13.8°C) on average during September.Humidity
In September, the average relative humidity in Swanington is 78%.Rainfall
In Swanington, Indiana, during September, the rain falls for 10.5 days and regularly aggregates up to 1.18" (30mm) of precipitation. Throughout the year, there are 139 rainfall days, and 20.16" (512mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Swanington, Indiana.Daylight
The average length of the day in September in Swanington is 12h and 27min.On the first day of September in Swanington, sunrise is at 7:17 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:32 pm EDT.
Sunshine
In September, the average sunshine in Swanington is 8.2h.UV index
The average daily maximum UV index in September in Swanington, Indiana, is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The UV index of 5 in September translates into these instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Swanington in September?
What is the average humidity in September in Swanington?
How many days does it rain in September in Swanington?
When it does not snow in Swanington?
How many hours of daylight does Swanington have in September?
When is the sunrise / sunset in September in Swanington?
How long on average sun shines in September in Swanington?
What is the UV index intensity in September in Swanington?
Average temperature in September
Swanington, IN
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Swanington, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Swanington, IN
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in September
Swanington, IN
- Average humidity in September: 78%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Swanington, IN
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in September
Swanington, IN
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Swanington, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Swanington, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Swanington, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Swanington, IN
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in September
Swanington, IN
- Average UV index in September: 5
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
Swanington, IN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Swanington, IN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Swanington, Indiana, USA
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