September weather forecast
Fredericksburg, TX

Weather in September

September, the first month of the autumn in Fredericksburg, is also a hot month, with temperature in the range of an average high of 86.2°F (30.1°C) and an average low of 67.6°F (19.8°C).

Temperature

In September, the average high-temperature slightly decreases from 93.6°F (34.2°C) in August to a still hot 86.2°F (30.1°C). The average low-temperature, in Fredericksburg, is 67.6°F (19.8°C).

Heat index

The average heat index in September is appraised at a very hot 95°F (35°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, clothing, wind, and pregnancy 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. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Fredericksburg, the average relative humidity in September is 67%.

Rainfall

In Fredericksburg, it is raining for 14.8 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, in Fredericksburg, Texas, there are 129.3 rainfall days, and 15.87" (403mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Fredericksburg.

Daylight

In Fredericksburg, the average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 7:12 am and sunset at 7:58 pm. On the last day of September, in Fredericksburg, sunrise is at 7:28 am and sunset at 7:22 pm CDT.

Sunshine

In Fredericksburg, the average sunshine in September is 8.5h.

UV index

The average daily maximum UV index in September in Fredericksburg is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 Fredericksburg?

In Fredericksburg, Texas, in September, the average high-temperature is 86.2°F (30.1°C), and the average low-temperature is 67.6°F (19.8°C). The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is appraised at 95°F (35°C).

What is the average humidity in September in Fredericksburg?

In September, the average relative humidity is 67%.

How much does it rain in Fredericksburg in September?

In September, in Fredericksburg, the rain falls for 14.8 days. Throughout September, 1.81" (46mm) of precipitation is accumulated.

When it does not snow in Fredericksburg?

April through October are months without snowfall in Fredericksburg.

How many hours of daylight does Fredericksburg have in September?

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

When are sunrise and sunset in September in Fredericksburg?

On the first day of September, sunrise is at 7:12 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:22 pm CDT.

How many hours of sunshine does Fredericksburg have in September?

In September, the average sunshine duration in Fredericksburg is 8.5h.

How high is the UV index in September in Fredericksburg?

In September, the average daily maximum UV index in Fredericksburg 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 sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Fredericksburg, TX

Average temperature in September - Fredericksburg, TX
  • Average high temperature in September: 86.2°F

The warmest month (with the highest average high temperature) is August (93.6°F).
The month with the lowest average high temperature is January (58.8°F).

  • Average low temperature in September: 67.6°F

The month with the highest average low temperature is August (72.3°F).
The coldest month (with the lowest average low temperature) is January (40.6°F).

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Average pressure in September
Fredericksburg, TX

Average pressure in September - Fredericksburg, 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 (29.89"Hg).

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Average wind speed in September
Fredericksburg, TX

Average wind speed in September - Fredericksburg, TX
  • Average wind speed in September: 7.3mph

The windiest months (with the highest average wind speed) are March and April (10.9mph).
The calmest month (with the lowest average wind speed) is September (7.3mph).

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Average humidity in September
Fredericksburg, TX

Average humidity in September - Fredericksburg, TX
  • Average humidity in September: 67%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in September
Fredericksburg, TX

Average rainfall in September - Fredericksburg, TX
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is February (0.63").

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Average rainfall days in September
Fredericksburg, TX

Average rainfall days in September - Fredericksburg, TX
  • Average rainfall days in September: 14.8 days

The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (7.1 days).

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Average snowfall in September
Fredericksburg, TX

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

The month with the highest snowfall is January (0.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Fredericksburg, TX

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

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

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

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

The month with the longest days is June (Average daylight: 14h and 4min).
The month with the shortest days is December (Average daylight: 10h and 14min).

  • Average sunshine in September: 8h and 30min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are November and December (Average sunshine: 5h and 48min).

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Average sunshine days in September
Fredericksburg, TX

Average sunshine days in September - Fredericksburg, TX
  • Average sunshine days in September: 12.3 days

The month with the most sunshine days is January (21.6 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in September
Fredericksburg, TX

Average UV index in September - Fredericksburg, 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
Fredericksburg, TX

Average cloud cover in September - Fredericksburg, TX
  • Average cloud cover in September: 33

The month with the most cloud cover is May (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in September
Fredericksburg, TX

Average visibility in September - Fredericksburg, 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).

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