September weather forecast
San Leanna, TX

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Weather in September

September, the first month of the autumn in San Leanna, is also a hot month, with temperature in the range of an average high of 87.8°F (31°C) and an average low of 70.7°F (21.5°C).

Temperature

Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a torrid 95.7°F (35.4°C) to a tropical 87.8°F (31°C). San Leanna usually reports an average low-temperature of 70.7°F (21.5°C) during the month of September.

Heat index

For September, the heat index is appraised at a very hot 98.6°F (37°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In San Leanna, the average relative humidity in September is 69%.

Rainfall

In San Leanna, during September, the rain falls for 16.4 days and regularly aggregates up to 3.27" (83mm) of precipitation. In San Leanna, during the entire year, the rain falls for 148 days and collects up to 24.92" (633mm) of precipitation.

Snowfall

March through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 7:08 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:24 am and sunset at 7:17 pm CDT.

Sunshine

The average sunshine in September is 8.3h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 in September translates into these instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. 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. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

The high-temperature, in September, in San Leanna, is 87.8°F (31°C), while the low-temperature averages to 70.7°F (21.5°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is appraised at 98.6°F (37°C).

What is the average humidity in September?

In September, the average relative humidity is 69%.

How much does it rain in September?

In September, the rain falls for 16.4 days. Throughout September, 3.27" (83mm) of precipitation is accumulated.

When it does not snow?

In San Leanna, snow does not fall in March through October.

What is the average length of the day in September?

In San Leanna, the average day length in September is 12h and 20min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:08 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:17 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration in San Leanna is 8.3h.

How high is the UV index in September?

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high hazard to health 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
San Leanna, TX

Average temperature in September - San Leanna, TX
  • Average high temperature in September: 87.8°F

The warmest month (with the highest average high temperature) is August (95.7°F).
The month with the lowest average high temperature is January (59.4°F).

  • Average low temperature in September: 70.7°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 (42.4°F).

Average pressure in September
San Leanna, TX

Average pressure in September - San Leanna, TX
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
San Leanna, TX

Average wind speed in September - San Leanna, TX
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is March (9.3mph).
The calmest month (with the lowest average wind speed) is September (6.2mph).

Average humidity in September
San Leanna, TX

Average humidity in September - San Leanna, TX
  • Average humidity in September: 69%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (61%).

Average rainfall in September
San Leanna, TX

Average rainfall in September - San Leanna, TX
  • Average rainfall in September: 3.27"

The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is February (1.02").

Average rainfall days in September
San Leanna, TX

Average rainfall days in September - San Leanna, TX
  • Average rainfall days in September: 16.4 days

The month with the highest number of rainy days is September (16.4 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in September
San Leanna, TX

Average snowfall in September - San Leanna, TX
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.16").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").

Average snowfall days in September
San Leanna, TX

Average snowfall days in September - San Leanna, TX
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
San Leanna, TX

Average daylight in September / Average sunshine in September - San Leanna, 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 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

Average sunshine days in September
San Leanna, TX

Average sunshine days in September - San Leanna, TX
  • Average sunshine days in September: 11.9 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is June (11.3 days).

Average UV index in September
San Leanna, TX

Average UV index in September - San Leanna, 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 3).

Average cloud cover in September
San Leanna, TX

Average cloud cover in September - San Leanna, TX
  • Average cloud cover in September: 34

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 25).

Average visibility in September
San Leanna, TX

Average visibility in September - San Leanna, 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).

San Leanna, Texas, USA

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