September weather forecast
Geronimo, TX

Weather in September

September, the first month of the autumn in Geronimo, is still a tropical month, with an average temperature varying between 71.1°F (21.7°C) and 89.1°F (31.7°C).

Temperature

In Geronimo, the average high-temperature in September marginally drops from a sweltering 96.6°F (35.9°C) in August to a tropical 89.1°F (31.7°C). The average low-temperature, in September, is 71.1°F (21.7°C).

Heat index

The average heat index in September is estimated at a sweltering 102.2°F (39°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light 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 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, pregnancy, differences in body mass, height, and shape, and clothing affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in September in Geronimo is 69%.

Rainfall

In Geronimo, Texas, during September, the rain falls for 15.4 days and regularly aggregates up to 2.83" (72mm) of precipitation. In Geronimo, during the entire year, the rain falls for 147.1 days and collects up to 21.26" (540mm) of precipitation.

Snowfall

March through November are months without snowfall in Geronimo.

Daylight

The average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 7:09 am and sunset at 7:54 pm. On the last day of September, in Geronimo, sunrise is at 7:24 am and sunset at 7:18 pm CDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Geronimo?

In Geronimo, in September, the average high-temperature is 89.1°F (31.7°C), and the average low-temperature is 71.1°F (21.7°C). in September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is estimated at 102.2°F (39°C).

What is the average humidity in September in Geronimo?

The average relative humidity in September in Geronimo is 69%.

How much does it rain in Geronimo in September?

In Geronimo, in September, it is raining for 15.4 days, with typically 2.83" (72mm) of accumulated precipitation.

When it does not snow in Geronimo?

In Geronimo, Texas, snow does not fall in March through November.

How many hours of daylight does Geronimo have in September?

In September, the average day length in Geronimo, Texas, is 12h and 20min.

When are sunrise and sunset in September in Geronimo?

In September, on the first day of the month, sunrise is at 7:09 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:18 pm CDT.

How many hours of sunshine does Geronimo have in September?

The average sunshine duration in September in Geronimo is 8.4h.

What is the UV index reading in September in Geronimo?

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

Average temperature in September
Geronimo, TX

Average temperature in September - Geronimo, TX
  • Average high temperature in September: 89.1°F

The warmest month (with the highest average high temperature) is August (96.6°F).
The month with the lowest average high temperature is January (60.6°F).

  • Average low temperature in September: 71.1°F

The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (44.1°F).

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Average pressure in September
Geronimo, TX

Average pressure in September - Geronimo, TX
  • Average pressure in September: 29.94"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in September
Geronimo, TX

Average wind speed in September - Geronimo, TX
  • Average wind speed in September: 6.1mph

The windiest months (with the highest average wind speed) are February and March (8.6mph).
The calmest month (with the lowest average wind speed) is September (6.1mph).

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Average humidity in September
Geronimo, TX

Average humidity in September - Geronimo, 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 (62%).

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Average rainfall in September
Geronimo, TX

Average rainfall in September - Geronimo, TX
  • Average rainfall in September: 2.83"

The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is February (0.71").

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Average rainfall days in September
Geronimo, TX

Average rainfall days in September - Geronimo, TX
  • Average rainfall days in September: 15.4 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (9.3 days).

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Average snowfall in September
Geronimo, TX

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

The months with the highest snowfall are January and February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Geronimo, TX

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

The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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

Average daylight in September / Average sunshine in September - Geronimo, TX
  • Average daylight in September: 12h and 20min

The month with the longest days is June (Average daylight: 14h and 1min).
The month with the shortest days is December (Average daylight: 10h and 17min).

  • Average sunshine in September: 8h and 24min

The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

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Average sunshine days in September
Geronimo, TX

Average sunshine days in September - Geronimo, TX
  • Average sunshine days in September: 12.5 days

The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is June (11.6 days).

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Average UV index in September
Geronimo, TX

Average UV index in September - Geronimo, 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).

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Average cloud cover in September
Geronimo, TX

Average cloud cover in September - Geronimo, TX
  • Average cloud cover in September: 34

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 26).

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Average visibility in September
Geronimo, TX

Average visibility in September - Geronimo, TX
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, July, August, September, October, November and December (6mi).
The months with the lowest visibility are April, May and June (5mi).

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