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
The advent of September observes an average high-temperature of a still moderately hot 75.2°F (24°C), nearly identical to August's 80.1°F (26.7°C). Riverwood throughout September, records an average low-temperature of 57.4°F (14.1°C).Humidity
The average relative humidity in September in Riverwood is 77%.Rainfall
In September, in Riverwood, the rain falls for 11.2 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 136 rainfall days, and 19.29" (490mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 7:12 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 7:27 pm EDT.
Sunshine
In September, the average sunshine in Riverwood is 8.2h.UV index
In Riverwood, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Riverwood?
What is the average humidity in September in Riverwood?
How many days does it rain in September in Riverwood?
When it does not snow in Riverwood?
Does it snow in Riverwood in September?
What is the average length of the day in September in Riverwood?
What time are sunrise and sunset in September in Riverwood?
How many hours of sunshine does Riverwood have in September?
What is the UV index intensity in September in Riverwood?
Average temperature in September
Riverwood, IN
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in September: 57.4°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 (20.3°F).
Average pressure in September
Riverwood, 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
Riverwood, IN
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Riverwood, IN
- Average humidity in September: 77%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Riverwood, IN
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is May (2.52").
The driest months (with the least rainfall) are February and November (1.02").
Average rainfall days in September
Riverwood, IN
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in September
Riverwood, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Riverwood, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Riverwood, 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 24min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Riverwood, IN
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in September
Riverwood, 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
Riverwood, IN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Riverwood, 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).
Riverwood, Indiana, USA
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