September weather forecast
Magnolia, TX

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Weather in September

September, the first month of the autumn in Magnolia, is still a tropical month, with an average temperature fluctuating between 72.1°F (22.3°C) and 89.6°F (32°C).

Temperature

The transition to September results in a modest reduction in average high-temperature, moving from a sweltering 96.1°F (35.6°C) in August to a tropical 89.6°F (32°C). The average nighttime temperature in Magnolia, Texas, lowers to an agreeable 72.1°F (22.3°C) throughout September.

Heat index

For most parts of September, the heat index is evaluated at a blistering 105.8°F (41°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

The average relative humidity in September in Magnolia, Texas, is 72%.

Rainfall

In Magnolia, Texas, in September, during 18.8 rainfall days, 3.62" (92mm) of precipitation is typically accumulated. In Magnolia, during the entire year, the rain falls for 175.4 days and collects up to 34.57" (878mm) of precipitation.

Snowfall

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

Daylight

In Magnolia, the average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 7:00 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:09 pm CDT.

Sunshine

The average sunshine in September is 8.3h.

UV index

The average daily maximum UV index in September in Magnolia is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 6 suggests these recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in Magnolia in September?

During September, Magnolia experiences an average high-temperature of 89.6°F (32°C) and a low-temperature of 72.1°F (22.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 105.8°F (41°C).

What is the average humidity in September in Magnolia?

In Magnolia, Texas, the average relative humidity in September is 72%.

How much does it rain in Magnolia in September?

In Magnolia, Texas, during September, the rain falls for 18.8 days and regularly aggregates up to 3.62" (92mm) of precipitation.

When it does not snow in Magnolia?

February through November are months without snowfall in Magnolia, Texas.

How many hours of daylight does Magnolia have in September?

The average day length in September is 12h and 20min.

When is the sunrise / sunset in September in Magnolia?

In September, on the first day of the month, sunrise is at 7:00 am and sunset at 7:45 pm. On the last day of the month, in Magnolia, sunrise is at 7:16 am and sunset at 7:09 pm CDT.

How many hours of sunshine does Magnolia have in September?

In Magnolia, Texas, the average sunshine duration in September is 8.3h.

What is the UV index intensity in September in Magnolia?

In Magnolia, Texas, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation.
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
Magnolia, TX

Average temperature in September - Magnolia, TX
  • Average high temperature in September: 89.6°F

The warmest month (with the highest average high temperature) is August (96.1°F).
The month with the lowest average high temperature is January (60.4°F).

  • Average low temperature in September: 72.1°F

The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

Average pressure in September
Magnolia, TX

Average pressure in September - Magnolia, 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).

Average wind speed in September
Magnolia, TX

Average wind speed in September - Magnolia, TX
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is September (5.6mph).

Average humidity in September
Magnolia, TX

Average humidity in September - Magnolia, TX
  • Average humidity in September: 72%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is August (67%).

Average rainfall in September
Magnolia, TX

Average rainfall in September - Magnolia, TX
  • Average rainfall in September: 3.62"

The wettest month (with the highest rainfall) is May (4.72").
The driest month (with the least rainfall) is November (1.97").

Average rainfall days in September
Magnolia, TX

Average rainfall days in September - Magnolia, TX
  • Average rainfall days in September: 18.8 days

The month with the highest number of rainy days is September (18.8 days).
The month with the least rainy days is January (11.7 days).

Average snowfall in September
Magnolia, TX

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

The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Magnolia, TX

Average snowfall days in September - Magnolia, 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 February, March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in September / Average sunshine in September - Magnolia, 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 month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

Average sunshine days in September
Magnolia, TX

Average sunshine days in September - Magnolia, TX
  • Average sunshine days in September: 9.2 days

The month with the most sunshine days is October (17.1 days).
The month with the least sunshine days is September (9.2 days).

Average UV index in September
Magnolia, TX

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

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in September
Magnolia, TX

Average cloud cover in September - Magnolia, 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).

Average visibility in September
Magnolia, TX

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

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

Magnolia, Texas, USA

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