September weather forecast
Otto, TX

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Weather in September

The first month of the autumn, September, is also a hot month in Otto, Texas, with an average temperature ranging between min 70.7°F (21.5°C) and max 88.7°F (31.5°C).

Temperature

Otto's weather subtly changes with the onset of September, barely falling from a torrid 96.4°F (35.8°C) in August to a hot 88.7°F (31.5°C). Otto, during September nights, observes an average temperature of 70.7°F (21.5°C).

Heat index

For most parts of September, the heat index is calculated to be a sweltering 100.4°F (38°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In September, the average relative humidity is 66%.

Rainfall

In September, the rain falls for 12.3 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. In Otto, during the entire year, the rain falls for 113.1 days and collects up to 14.17" (360mm) of precipitation.

Snowfall

January, March through December are months without snowfall.

Daylight

In Otto, the average length of the day in September is 12h and 21min.
On the first day of September, sunrise is at 7:03 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:13 pm CDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In Otto, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the UV index of 6 transforms into the following advice:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Updated: Jul 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

The average high-temperature, in September, in Otto, is 88.7°F (31.5°C), while the average low-temperature is 70.7°F (21.5°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, in September is calculated to be 100.4°F (38°C).

What is the average humidity in September in Otto?

The average relative humidity in September is 66%.

How many days does it rain in September in Otto?

In Otto, in September, during 12.3 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.

When it does not snow?

January, March through December are months without snowfall.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:03 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:13 pm CDT.

How long on average sun shines in September?

In Otto, the average sunshine duration in September is 8.6h.

What is the UV index reading in September?

In Otto, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability 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
Otto, TX

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

The warmest month (with the highest average high temperature) is August (96.4°F).
The month with the lowest average high temperature is January (57°F).

  • Average low temperature in September: 70.7°F

The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).

Average pressure in September
Otto, TX

Average pressure in September - Otto, TX
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in September
Otto, TX

Average wind speed in September - Otto, TX
  • Average wind speed in September: 6.6mph

The windiest month (with the highest average wind speed) is March (9.9mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).

Average humidity in September
Otto, TX

Average humidity in September - Otto, TX
  • Average humidity in September: 66%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (59%).

Average rainfall in September
Otto, TX

Average rainfall in September - Otto, TX
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is February (0.71").

Average rainfall days in September
Otto, TX

Average rainfall days in September - Otto, TX
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is May (12.9 days).
The month with the least rainy days is January (5.8 days).

Average snowfall in September
Otto, TX

Average snowfall in September - Otto, TX
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.08").
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
Otto, TX

Average snowfall days in September - Otto, TX
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

Average daylight in September /
Average sunshine in September
Otto, TX

Average daylight in September / Average sunshine in September - Otto, 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 4min

The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

Average sunshine days in September
Otto, TX

Average sunshine days in September - Otto, TX
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is January (24 days).
The month with the least sunshine days is May (14.8 days).

Average UV index in September
Otto, TX

Average UV index in September - Otto, TX
  • Average UV index in September: 6

The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January and December (UV index 3).

Average cloud cover in September
Otto, TX

Average cloud cover in September - Otto, TX
  • Average cloud cover in September: 30

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 22).

Average visibility in September
Otto, TX

Average visibility in September - Otto, 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).

Otto, Texas, USA

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