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 arrival of September corresponds with a minor reduction in the average high-temperature, down from August's fiery hot 96.3°F (35.7°C) to a hot 89.6°F (32°C). Throughout September, Riverside experiences a low-temperature average of 69.3°F (20.7°C).Heat index
For most parts of September, the heat index is evaluated at a blistering 107.6°F (42°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
In Riverside, the average relative humidity in September is 73%.Rainfall
In Riverside, in September, during 16.9 rainfall days, 3.19" (81mm) of precipitation is typically accumulated. In Riverside, during the entire year, the rain falls for 168.8 days and collects up to 34.33" (872mm) of precipitation.Snowfall
In Riverside, snow does not fall in March through November.Daylight
The average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:58 am and sunset at 7:44 pm. On the last day of September, in Riverside, Texas, sunrise is at 7:15 am and sunset at 7:07 pm CDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In Riverside, Texas, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 6 in September leads to these recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot is it in Riverside in September?
What is the average humidity in September in Riverside?
How much does it rain in Riverside in September?
When it does not snow in Riverside?
How many hours of daylight does Riverside have in September?
When is the sunrise / sunset in September in Riverside?
How long on average sun shines in September in Riverside?
What is the UV index intensity 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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