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 Twin, September's average high-temperature stands at a still hot 88°F (31.1°C), closely related to the preceding month. Twin experiences a steady low-temperature of 70.2°F (21.2°C) throughout September.Heat index
For September, the heat index is appraised at a blisteringly hot 104°F (40°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.When assessing, remember that heat index measurements are for light winds and shaded spots. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.
Humidity
The average relative humidity in September is 76%.Rainfall
In Twin, in September, during 17.4 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, there are 177.1 rainfall days, and 35.67" (906mm) of precipitation is accumulated.Snowfall
In Twin, snow does not fall in February through November.Daylight
In Twin, the average length of the day in September is 12h and 20min.On the first day of September in Twin, sunrise is at 6:35 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:45 pm CDT.
Sunshine
In Twin, the average sunshine in September is 9.5h.UV index
In Twin, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 6 during September leads to these advisories:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Twin have in September?
What is the UV index reading in September?
Average temperature in September
Twin, MS
- Average high temperature in September: 88°F
The warmest months (with the highest average high temperature) are July and August (91.6°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in September: 70.2°F
The month with the highest average low temperature is August (74.1°F).
The coldest month (with the lowest average low temperature) is January (41.7°F).
Average pressure in September
Twin, MS
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in September
Twin, MS
- Average wind speed in September: 4.6mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).
Average humidity in September
Twin, MS
- Average humidity in September: 76%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Twin, MS
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is August (4.65").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in September
Twin, MS
- Average rainfall days in September: 17.4 days
The month with the highest number of rainy days is August (22.1 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in September
Twin, MS
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.24").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Twin, MS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Twin, MS
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Twin, MS
- Average sunshine days in September: 10.7 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is August (7.1 days).
Average UV index in September
Twin, MS
- Average UV index in September: 6
The months with the highest UV index are May, June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Twin, MS
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Twin, MS
- Average visibility in September: 5mi
The months with the highest visibility are January, June, July, August, October and November (6mi).
The months with the lowest visibility are February, March, April, May, September and December (5mi).
Twin, Mississippi, USA
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