Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's sweltering 95°F (35°C) to a tropical 88.2°F (31.2°C). In the month of September, Grey Forest experiences an average low-temperature of 70.5°F (21.4°C).Heat index
The heat index value during September is estimated at a very hot 98.6°F (37°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
In Grey Forest, Texas, the average relative humidity in September is 67%.Rainfall
In September, the rain falls for 16.4 days. Throughout September, 3.46" (88mm) of precipitation is accumulated. In Grey Forest, during the entire year, the rain falls for 140.3 days and collects up to 23.15" (588mm) of precipitation.Snowfall
March through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 7:12 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:21 pm CDT.
Sunshine
In September, the average sunshine in Grey Forest is 8.5h.UV index
In September, the average daily maximum UV index in Grey Forest is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Grey Forest during September?
What is the average humidity in September in Grey Forest?
How much does it rain in Grey Forest in September?
When it does not snow in Grey Forest?
How many hours of daylight does Grey Forest have in September?
When is the sunrise / sunset in September in Grey Forest?
How many hours of sunshine does Grey Forest have in September?
What is the UV index intensity in September in Grey Forest?
Average temperature in September
Grey Forest, TX
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.5°F).
The coldest month (with the lowest average low temperature) is January (43.2°F).
Average pressure in September
Grey Forest, 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 (29.89"Hg).
Average wind speed in September
Grey Forest, TX
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is September (6.5mph).
Average humidity in September
Grey Forest, TX
- Average humidity in September: 67%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Grey Forest, TX
- Average rainfall in September: 3.46"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in September
Grey Forest, TX
- Average rainfall days in September: 16.4 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Grey Forest, 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, November and December (0").
Average snowfall days in September
Grey Forest, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Grey Forest, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are November and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Grey Forest, TX
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is September (11.2 days).
Average UV index in September
Grey Forest, 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).
Average cloud cover in September
Grey Forest, TX
- Average cloud cover in September: 34
The months with the most cloud cover are March and May (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Grey Forest, 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).
Grey Forest, Texas, USA
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