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 introduction of September sees an average high-temperature of a still hot 87.3°F (30.7°C), hardly deviating from August. During September, Bay City records an average temperature of 73.2°F (22.9°C) at night.Heat index
September's average heat index is computed to be a torrid 102.2°F (39°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.Be advised, the heat index considers values for conditions in shade and with a light breeze. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
In Bay City, the average relative humidity in September is 77%.Rainfall
The month with the most rainfall is September, when the rain falls for 18.7 days and typically aggregates up to 3.94" (100mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 19min.On the first day of the month, sunrise is at 7:02 am and sunset at 7:45 pm. On the last day of September, sunrise is at 7:16 am and sunset at 7:10 pm CDT.
Sunshine
In Bay City, Texas, the average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index in Bay City is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Resist extreme sun exposure. Guarding against solar damage is essential. 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. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
What is the rainiest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Bay City, TX
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is August (92.5°F).
The month with the lowest average high temperature is January (61.9°F).
- Average low temperature in September: 73.2°F
The month with the highest average low temperature is August (77°F).
The coldest month (with the lowest average low temperature) is January (47.5°F).
Average pressure in September
Bay City, 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 (29.93"Hg).
Average wind speed in September
Bay City, TX
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is September (6.5mph).
Average humidity in September
Bay City, TX
- Average humidity in September: 77%
The months with the highest relative humidity are February and March (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Bay City, TX
- Average rainfall in September: 3.94"
The wettest month (with the highest rainfall) is September (3.94").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in September
Bay City, TX
- Average rainfall days in September: 18.7 days
The month with the highest number of rainy days is September (18.7 days).
The month with the least rainy days is January (11.9 days).
Average snowfall in September
Bay City, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Bay City, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Bay City, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in September
Bay City, TX
- Average sunshine days in September: 9.5 days
The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is September (9.5 days).
Average UV index in September
Bay City, 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
Bay City, TX
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Bay City, 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).
Bay City, Texas, USA
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