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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a tropical 89.2°F (31.8°C) in August to a moderately hot 83.8°F (28.8°C). During the nights in September, the temperature in Saint Matthews averages to an enjoyable 67.1°F (19.5°C).Heat index
The average heat index in September is computed to be a tropical 91.4°F (33°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.Take note of the fact that heat index values are based on shaded circumstances with light airflows. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', comes about by integrating the temperature readings with the humidity levels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
In Saint Matthews, the average relative humidity in September is 75%.Rainfall
In Saint Matthews, in September, it is raining for 12.8 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, in Saint Matthews, there are 159.1 rainfall days, and 29.96" (761mm) of precipitation is accumulated.Snowfall
March through October are months without snowfall in Saint Matthews.Daylight
The average length of the day in September in Saint Matthews is 12h and 22min.On the first day of the month, sunrise is at 6:57 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:08 pm EDT.
Sunshine
In Saint Matthews, South Carolina, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.Note: The average daily UV index of 6 in September transforms into the following instructions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
How hot is it in Saint Matthews in September?
What is the average humidity in September in Saint Matthews?
How much does it rain in Saint Matthews in September?
When it does not snow in Saint Matthews?
How many hours of daylight does Saint Matthews have in September?
What time are sunrise and sunset in September in Saint Matthews?
How long on average sun shines in September in Saint Matthews?
How high is the UV index in September in Saint Matthews?
Average temperature in September
Saint Matthews, SC
- Average high temperature in September: 83.8°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 (53.6°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).
Average pressure in September
Saint Matthews, SC
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Saint Matthews, SC
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Saint Matthews, SC
- Average humidity in September: 75%
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are January and November (71%).
Average rainfall in September
Saint Matthews, SC
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in September
Saint Matthews, SC
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in September
Saint Matthews, SC
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.35").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in September
Saint Matthews, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.8 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
Saint Matthews, SC
- 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: 10h and 0min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Saint Matthews, SC
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is August (9.4 days).
Average UV index in September
Saint Matthews, SC
- Average UV index in September: 6
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 3).
Average cloud cover in September
Saint Matthews, SC
- Average cloud cover in September: 31
The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Saint Matthews, SC
- 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).
Saint Matthews, South Carolina, USA
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