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 commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from a fiery hot 96.3°F (35.7°C) in August to a tropical 89.6°F (32°C). In the month of September, the average low-temperature usually rests at an agreeable 69.3°F (20.7°C).Heat index
The heat index in September is estimated at an extremely hot 107.6°F (42°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
The average relative humidity in September is 73%.Rainfall
In Riverside, during September, the rain falls for 16.9 days and regularly aggregates up to 3.19" (81mm) of precipitation. In Riverside, during the entire year, the rain falls for 168.8 days and collects up to 34.33" (872mm) of precipitation.Snowfall
March through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 6:58 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:07 pm CDT.
Sunshine
In Riverside, Texas, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September in Riverside is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Riverside in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Riverside have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Riverside have in September?
What is the UV index reading in September in Riverside?
Average temperature in September
Riverside, TX
- Average high temperature in September: 89.6°F
The warmest month (with the highest average high temperature) is August (96.3°F).
The month with the lowest average high temperature is January (57.9°F).
- Average low temperature in September: 69.3°F
The months with the highest average low temperature are July and August (73.8°F).
The coldest month (with the lowest average low temperature) is January (41.2°F).
Average pressure in September
Riverside, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Riverside, TX
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is September (4.8mph).
Average humidity in September
Riverside, TX
- Average humidity in September: 73%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Riverside, TX
- Average rainfall in September: 3.19"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is November (1.93").
Average rainfall days in September
Riverside, TX
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is September (16.9 days).
The month with the least rainy days is October (11.7 days).
Average snowfall in September
Riverside, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Riverside, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Riverside, TX
- 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: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Riverside, TX
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is October (17.6 days).
The month with the least sunshine days is September (11.2 days).
Average UV index in September
Riverside, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Riverside, TX
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Riverside, TX
- Average visibility in September: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (5mi).
Riverside, Texas, USA
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