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
September brings a minor shift in the average high-temperature, adjusting from 84.7°F (29.3°C) in August to a still moderately hot 78.3°F (25.7°C). Salem's temperature tends to fall to an average low of 59°F (15°C) during the nights of September.Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.5 days and typically collects 1.02" (26mm) of precipitation.Snowfall
In Salem, Indiana, snow does not fall in May through September.Daylight
In Salem, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 7:14 am and sunset at 8:14 pm. On the last day of September, sunrise is at 7:40 am and sunset at 7:28 pm EDT.
Sunshine
The average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 5 during September translates into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the least humid month in Salem?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in Salem in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Salem have in September?
How high is the UV index in September?
Average temperature in September
Salem, IN
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Salem, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Salem, IN
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in September
Salem, IN
- Average humidity in September: 75%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are September and October (75%).
Average rainfall in September
Salem, IN
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is April (2.2").
The driest month (with the least rainfall) is September (1.02").
Average rainfall days in September
Salem, IN
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in September
Salem, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Salem, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.4 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
Salem, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in September
Salem, IN
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in September
Salem, 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
Salem, IN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Salem, IN
- Average visibility in September: 5mi
The months with the highest visibility are March, April, June, October and November (6mi).
The months with the lowest visibility are January, February, May, July, August, September and December (5mi).
Salem, Indiana, USA
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