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
Sherman observes a small decrease in the average high-temperature with the arrival of September, falling from August's tropical 94.1°F (34.5°C) to a still hot 86°F (30°C). Nighttime temperatures hover around an average low of 67.5°F (19.7°C) in September.Heat index
Throughout September, the heat index is evaluated at a tropical 93.2°F (34°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.When assessing, remember that heat index measurements are for light winds and shaded spots. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
In Sherman, the average relative humidity in September is 66%.Rainfall
In Sherman, in September, during 13.5 rainfall days, 3.19" (81mm) of precipitation is typically accumulated. Throughout the year, there are 140.2 rainfall days, and 31.77" (807mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 7:00 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:11 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 6 in September translates into these instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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?
How many days 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 Sherman?
How many hours of sunshine does Sherman have in September?
What is the UV index intensity in September?
Average temperature in September
Sherman, TX
- Average high temperature in September: 86°F
The warmest month (with the highest average high temperature) is August (94.1°F).
The month with the lowest average high temperature is January (52.2°F).
- Average low temperature in September: 67.5°F
The month with the highest average low temperature is July (74.1°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).
Average pressure in September
Sherman, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Sherman, TX
- Average wind speed in September: 6.9mph
The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is September (6.9mph).
Average humidity in September
Sherman, TX
- Average humidity in September: 66%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Sherman, TX
- Average rainfall in September: 3.19"
The wettest month (with the highest rainfall) is October (4.09").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in September
Sherman, TX
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Sherman, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Sherman, TX
- 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
Sherman, TX
- 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 4min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Sherman, TX
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is January (21.7 days).
The month with the least sunshine days is April (13.9 days).
Average UV index in September
Sherman, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Sherman, TX
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Sherman, TX
- 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).
Sherman, Texas, USA
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