September weather forecast
Fredericksburg, TX

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Weather in September

Fredericksburg's weather in September ushers in the fall season after three intense summer months. The climate gradually begins to cool down, with increased rainfall and humidity levels similar to late spring. Sunlight hours and visibility go through a discernable decline as overcast days slowly start to outnumber clear-skied days. The temperature steadily moves between 67.6°F (19.8°C) and 86.2°F (30.1°C), marking a significant drop compared to August. Alongside lowering temperatures, the city witnesses shorter daylight periods during the day, and this decline continues into the following months.

Temperature

A modest decline in the average high-temperature is seen in Fredericksburg, Texas, during September, decreasing from a hot 93.6°F (34.2°C) in August to a still tropical 86.2°F (30.1°C). During the month of September, Fredericksburg experiences a steady low-temperature average of 67.6°F (19.8°C).

Heat index

For most parts of September, the heat index is computed to be a sweltering 95°F (35°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. 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, Texas, the average relative humidity in September is 67%.

Rainfall

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

Snowfall

In Fredericksburg, snow does not fall in April through October.

Daylight

In Fredericksburg, the average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 7:12 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:21 pm CDT.

Sunshine

The average sunshine in September in Fredericksburg is 8.5h.

UV index

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, an average UV index of 6 transforms into the following instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. 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. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

Is it hot in Fredericksburg during September?

An average high-temperature, in September, in Fredericksburg, 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', 'apparent temperature'), which combines air temperature and relative humidity, in September is computed to be 95°F (35°C).

What is the average humidity in September in Fredericksburg?

The average relative humidity in September in Fredericksburg is 67%.

How much does it rain in Fredericksburg in September?

In Fredericksburg, in September, during 14.8 rainfall days, 1.81" (46mm) of precipitation is typically accumulated.

When it does not snow in Fredericksburg?

April through October are months without snowfall.

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

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

When is the sunrise / sunset in September in Fredericksburg?

In September, on the first day of the month, sunrise is at 7:12 am and sunset at 7:57 pm. On the last day of the month, in Fredericksburg, sunrise is at 7:28 am and sunset at 7:21 pm CDT.

How many hours of sunshine does Fredericksburg have in September?

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

What is the UV index intensity in September in Fredericksburg?

In September, the average daily maximum UV index in Fredericksburg, Texas, is 6. A UV Index reading of 6 to 7 represents a high health threat 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
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 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 3min

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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Fredericksburg, Texas, USA

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