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
September signals a slight drop in average high-temperature, sliding from August's 94.5°F (34.7°C) to a still tropical 88.9°F (31.6°C). During September, Forbes records an average temperature of 69.1°F (20.6°C) at night.Heat index
The average heat index in September is evaluated at an extremely hot 105.8°F (41°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Note that heat index values are valued for light wind and location in the shade. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
The average relative humidity in September is 76%.Rainfall
In Forbes, in September, it is raining for 16.8 days, with typically 3.07" (78mm) of accumulated precipitation. Throughout the year, there are 175 rainfall days, and 35.28" (896mm) of precipitation is accumulated.Snowfall
In Forbes, snow does not fall in March through November.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:52 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 7:01 pm CDT.
Sunshine
In Forbes, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 6 suggests this advice:
Shun overexposure. Protection from sun ravages is indispensable. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Forbes have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Forbes have in September?
How high is the UV index in September?
Average temperature in September
Forbes, TX
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is January (58.5°F).
- Average low temperature in September: 69.1°F
The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Forbes, 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
Forbes, TX
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).
Average humidity in September
Forbes, TX
- Average humidity in September: 76%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Forbes, TX
- Average rainfall in September: 3.07"
The wettest month (with the highest rainfall) is August (4.33").
The driest months (with the least rainfall) are February and November (2.13").
Average rainfall days in September
Forbes, TX
- Average rainfall days in September: 16.8 days
The month with the highest number of rainy days is August (19.8 days).
The month with the least rainy days is November (10.9 days).
Average snowfall in September
Forbes, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.55").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Forbes, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Forbes, 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 5min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Forbes, TX
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is August (9.4 days).
Average UV index in September
Forbes, TX
- Average UV index in September: 6
The months with the highest UV index are May, June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Forbes, TX
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is October (Cloud cover 33).
Average visibility in September
Forbes, TX
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Forbes, Texas, USA
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