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 average high-temperature slightly decreases in September, shifting from a hot 90.3°F (32.4°C) in August to a warm 84.9°F (29.4°C). The temperature in Blair lowers to an average of 64.8°F (18.2°C) during September nights.Heat index
The heat index for September is calculated to be a hot 93.2°F (34°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Humidity
In September, the average relative humidity is 72%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.8 days and typically collects 2.24" (57mm) of precipitation.Snowfall
In Blair, Mississippi, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 6:28 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:40 pm CDT.
Sunshine
In Blair, the average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 during September translates into the following guidance:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during 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?
What is the average length of the day in September?
What time are sunrise and sunset in September in Blair?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Blair, MS
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (34°F).
Average pressure in September
Blair, MS
- 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 (29.96"Hg).
Average wind speed in September
Blair, MS
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in September
Blair, MS
- Average humidity in September: 72%
The months with the highest relative humidity are March and December (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Blair, MS
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is February (4.29").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Blair, MS
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is November (10.3 days).
Average snowfall in September
Blair, MS
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Blair, MS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Blair, MS
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Blair, MS
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in September
Blair, MS
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Blair, MS
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in September
Blair, MS
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Blair, Mississippi, USA
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