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
As Three Rivers enters September, the average high-temperature subtly lowers from the a fiery hot 97.5°F (36.4°C) of August to a hot 90.5°F (32.5°C). Three Rivers records an average nighttime low-temperature of 73.9°F (23.3°C) throughout September.Heat index
The heat index value during September is appraised at a scorching 105.8°F (41°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.In reference to the heat index, it's for places in shade and with a slight wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important 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.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
The average relative humidity in September is 68%.Rainfall
In Three Rivers, during September, the rain falls for 13.4 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Three Rivers, during the entire year, the rain falls for 102.4 days and collects up to 8.78" (223mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
In Three Rivers, the average length of the day in September is 12h and 19min.On the first day of the month, sunrise is at 7:11 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:25 am and sunset at 7:19 pm CDT.
Sunshine
The average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 7 in September translates into this advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in 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 long on average sun shines in September?
What is the UV index reading in September in Three Rivers?
Average temperature in September
Three Rivers, TX
- Average high temperature in September: 90.5°F
The warmest month (with the highest average high temperature) is August (97.5°F).
The month with the lowest average high temperature is January (64°F).
- Average low temperature in September: 73.9°F
The month with the highest average low temperature is August (77.5°F).
The coldest month (with the lowest average low temperature) is January (47.3°F).
Average pressure in September
Three Rivers, TX
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Three Rivers, TX
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is May (10.8mph).
The calmest month (with the lowest average wind speed) is September (7.8mph).
Average humidity in September
Three Rivers, TX
- Average humidity in September: 68%
The months with the highest relative humidity are March and May (73%).
The month with the lowest relative humidity is August (62%).
Average rainfall in September
Three Rivers, TX
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is May (1.34").
The driest month (with the least rainfall) is February (0.24").
Average rainfall days in September
Three Rivers, TX
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is September (13.4 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Three Rivers, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Three Rivers, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Three Rivers, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Three Rivers, TX
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is September (14.5 days).
Average UV index in September
Three Rivers, TX
- Average UV index in September: 7
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Three Rivers, TX
- Average cloud cover in September: 32
The months with the most cloud cover are February, March and December (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Three Rivers, 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).
Three Rivers, Texas, USA
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