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 onset of September brings a small shift in high-temperatures, falling from a hot 88.7°F (31.5°C) in August to a warm 82.2°F (27.9°C). In Salem, the September nights cool down to an average low of 61.7°F (16.5°C).Heat index
For September, the heat index is calculated to be a tropical 87.8°F (31°C). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.When referencing the heat index, its values are suitable for shady environments and light breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
In Salem, the average relative humidity in September is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.61" (41mm) of precipitation.Snowfall
In Salem, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 6:39 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm CDT.
Sunshine
In Salem, the average sunshine in September is 9.6h.UV index
In Salem, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Salem in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Salem have in September?
When 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, AR
- Average high temperature in September: 82.2°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (44.1°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in September
Salem, AR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Salem, AR
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are January, March and April (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Salem, AR
- Average humidity in September: 74%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Salem, AR
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is April (4.21").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
Salem, AR
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in September
Salem, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Salem, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.2 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
Salem, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Salem, AR
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is December (20 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in September
Salem, AR
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Salem, AR
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Salem, AR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Salem, Arkansas, USA
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