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
In the transition from August to September, Clinton reports an average high-temperature of a still warm 76.6°F (24.8°C), indicating a close resemblance to the prior month. In September, Clinton experiences an average nighttime temperature of 58.1°F (14.5°C).Humidity
The average relative humidity in September in Clinton, Indiana, is 77%.Rainfall
In Clinton, during September, the rain falls for 10.5 days and regularly aggregates up to 1.22" (31mm) of precipitation. In Clinton, during the entire year, the rain falls for 146.1 days and collects up to 21.02" (534mm) of precipitation.Snowfall
May through October 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 7:18 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:33 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 5 during September translates into these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Clinton?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Clinton have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Clinton have in September?
How high is the UV index in September?
Average temperature in September
Clinton, IN
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Clinton, 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
Clinton, IN
- Average wind speed in September: 6.8mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Clinton, IN
- Average humidity in September: 77%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Clinton, IN
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is November (1.02").
Average rainfall days in September
Clinton, IN
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (7.4 days).
Average snowfall in September
Clinton, IN
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Clinton, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Clinton, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Clinton, IN
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (10 days).
Average UV index in September
Clinton, IN
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Clinton, IN
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are June, August and September (Cloud cover 31).
Average visibility in September
Clinton, 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).
Clinton, Indiana, USA
Weather forecast for your location
2. Allow the app to use your location