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
With the onset of September, the average high-temperature stands at a still moderately hot 78.8°F (26°C), closely aligned with August's 83.8°F (28.8°C). Petersburg's nighttime temperature in September drops to an average of 60.3°F (15.7°C).Humidity
In September, the average relative humidity is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 11.7 days and accumulates 1.38" (35mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Petersburg, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 7:19 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 7:33 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Petersburg, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Heed the precautions - Suggestions to avoid sunburn are made. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
What is the driest month?
How much does it rain in Petersburg in September?
When it does not snow in Petersburg?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Petersburg, IN
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 60.3°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in September
Petersburg, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Petersburg, IN
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are January, February and April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Petersburg, IN
- Average humidity in September: 74%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Petersburg, IN
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is April (3.19").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in September
Petersburg, IN
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (9.2 days).
Average snowfall in September
Petersburg, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Petersburg, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 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
Petersburg, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 3min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).
Average sunshine days in September
Petersburg, IN
- Average sunshine days in September: 16 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in September
Petersburg, IN
- Average UV index in September: 5
The months with the highest UV index are May, 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
Petersburg, IN
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June and August (Cloud cover 29).
Average visibility in September
Petersburg, 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).
Petersburg, Indiana, USA
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