September weather forecast
Oak Valley, TX

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Weather in September

September, the first month of the autumn in Oak Valley, is also a hot month, with temperature in the range of an average low of 69.6°F (20.9°C) and an average high of 88.7°F (31.5°C).

Temperature

With September's onset, the weather reveals a slight temperature decrease, transitioning from a sweltering 95.5°F (35.3°C) in August to a hot 88.7°F (31.5°C). Oak Valley, in September, experiences an average temperature of 69.6°F (20.9°C) at night.

Heat index

In September, the average heat index is computed to be a torrid 100.4°F (38°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

The average relative humidity in September is 67%.

Rainfall

In Oak Valley, in September, it is raining for 11.9 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, there are 108.8 rainfall days, and 15.08" (383mm) of precipitation is accumulated.

Snowfall

In Oak Valley, snow does not fall in April through December.

Daylight

In Oak Valley, the average length of the day in September is 12h and 21min.
On the first day of the month, sunrise is at 7:01 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:11 pm CDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 6 during September translates into these guidelines:
Shun overexposure. Protection from sun ravages is indispensable. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Updated: Jun 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

The average high-temperature, in September, in Oak Valley, is 88.7°F (31.5°C), while the average low-temperature is 69.6°F (20.9°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in September is computed to be 100.4°F (38°C).

What is the average humidity in September?

In September, the average relative humidity is 67%.

How much does it rain in September?

In September, the rain falls for 11.9 days. Throughout September, 1.26" (32mm) of precipitation is accumulated.

When it does not snow?

April through December are months without snowfall.

How many hours of daylight does Oak Valley have in September?

In September, the average day length is 12h and 21min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 7:01 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:11 pm CDT.

How many hours of sunshine does Oak Valley have in September?

In September, the average sunshine duration is 8.4h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Oak Valley, TX

Average temperature in September - Oak Valley, TX
  • Average high temperature in September: 88.7°F

The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (55.4°F).

  • Average low temperature in September: 69.6°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (40.1°F).

Average pressure in September
Oak Valley, TX

Average pressure in September - Oak Valley, 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 (29.92"Hg).

Average wind speed in September
Oak Valley, TX

Average wind speed in September - Oak Valley, TX
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is March (9.6mph).
The calmest month (with the lowest average wind speed) is September (6.3mph).

Average humidity in September
Oak Valley, TX

Average humidity in September - Oak Valley, TX
  • Average humidity in September: 67%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (61%).

Average rainfall in September
Oak Valley, TX

Average rainfall in September - Oak Valley, TX
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is November (0.71").

Average rainfall days in September
Oak Valley, TX

Average rainfall days in September - Oak Valley, TX
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (5.7 days).

Average snowfall in September
Oak Valley, TX

Average snowfall in September - Oak Valley, TX
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.28").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").

Average snowfall days in September
Oak Valley, TX

Average snowfall days in September - Oak Valley, TX
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.9 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
Oak Valley, TX

Average daylight in September / Average sunshine in September - Oak Valley, TX
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

Average sunshine days in September
Oak Valley, TX

Average sunshine days in September - Oak Valley, TX
  • Average sunshine days in September: 16.5 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is May (15.4 days).

Average UV index in September
Oak Valley, TX

Average UV index in September - Oak Valley, 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
Oak Valley, TX

Average cloud cover in September - Oak Valley, TX
  • Average cloud cover in September: 30

The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 23).

Average visibility in September
Oak Valley, TX

Average visibility in September - Oak Valley, 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).

Oak Valley, Texas, USA

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