September weather forecast
Conroe, TX

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Weather in September

September, the first month of the autumn in Conroe, is also a hot month, with an average temperature ranging between min 70.7°F (21.5°C) and max 89.1°F (31.7°C).

Temperature

September is marked by a subtle drop in average high-temperatures, transitioning from a very hot 95.5°F (35.3°C) in August to a tropical 89.1°F (31.7°C). Throughout the month of September, Conroe expects an average low of 70.7°F (21.5°C).

Heat index

September's heat index is calculated to be a scorching 105.8°F (41°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
In the scope of the heat index, its values resonate with 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 'felt air temperature' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In Conroe, the average relative humidity in September is 74%.

Rainfall

In Conroe, in September, during 18.2 rainfall days, 3.5" (89mm) of precipitation is typically accumulated. Throughout the year, there are 176.1 rainfall days, and 34.33" (872mm) of precipitation is accumulated.

Snowfall

In Conroe, snow does not fall in February through November.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of the month, sunrise is at 6:59 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:07 pm CDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

The average daily maximum UV index in September in Conroe is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during September translates into these guidelines:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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Frequently asked questions

How hot is September in Conroe?

The average high-temperature, in September, in Conroe, is 89.1°F (31.7°C), while the average low-temperature is 70.7°F (21.5°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 105.8°F (41°C).

What is the average humidity in September in Conroe?

In September, the average relative humidity in Conroe, Texas, is 74%.

How many days does it rain in September in Conroe?

In Conroe, Texas, in September, it is raining for 18.2 days, with typically 3.5" (89mm) of accumulated precipitation.

When it does not snow in Conroe?

February through November are months without snowfall in Conroe.

What is the average length of the day in September in Conroe?

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

When are sunrise and sunset in September in Conroe?

On the first day of September in Conroe, Texas, sunrise is at 6:59 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:07 pm CDT.

How many hours of sunshine does Conroe have in September?

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

How high is the UV index in September in Conroe?

In September, the average daily maximum UV index in Conroe, Texas, 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
Conroe, TX

Average temperature in September - Conroe, TX
  • Average high temperature in September: 89.1°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 (59.2°F).

  • Average low temperature in September: 70.7°F

The months with the highest average low temperature are July and August (74.8°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).

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Average pressure in September
Conroe, TX

Average pressure in September - Conroe, TX
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Conroe, TX

Average wind speed in September - Conroe, TX
  • Average wind speed in September: 5.1mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is September (5.1mph).

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Average humidity in September
Conroe, TX

Average humidity in September - Conroe, TX
  • Average humidity in September: 74%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (69%).

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Average rainfall in September
Conroe, TX

Average rainfall in September - Conroe, TX
  • Average rainfall in September: 3.5"

The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is November (1.97").

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Average rainfall days in September
Conroe, TX

Average rainfall days in September - Conroe, TX
  • Average rainfall days in September: 18.2 days

The month with the highest number of rainy days is September (18.2 days).
The months with the least rainy days are January and October (12.1 days).

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Average snowfall in September
Conroe, TX

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

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

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Average snowfall days in September
Conroe, TX

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

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

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

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

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

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Average sunshine days in September
Conroe, TX

Average sunshine days in September - Conroe, TX
  • Average sunshine days in September: 9.9 days

The months with the most sunshine days are January and October (16.6 days).
The month with the least sunshine days is September (9.9 days).

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Average UV index in September
Conroe, TX

Average UV index in September - Conroe, 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
Conroe, TX

Average cloud cover in September - Conroe, TX
  • Average cloud cover in September: 35

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in September
Conroe, TX

Average visibility in September - Conroe, TX
  • Average visibility in September: 5mi

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

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Conroe, Texas, USA

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