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
Shenandoah's weather subtly changes with the onset of September, barely falling from a sweltering 96.1°F (35.6°C) in August to a tropical 89.4°F (31.9°C). Shenandoah experiences a mean low-temperature of 71.8°F (22.1°C) during September.Heat index
In September, the heat index is calculated to be a blistering 105.8°F (41°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. 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 are largely significant for babies and toddlers. 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.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.
Humidity
In Shenandoah, Texas, the average relative humidity in September is 72%.Rainfall
In September, the rain falls for 19.1 days. Throughout September, 3.54" (90mm) of precipitation is accumulated. In Shenandoah, during the entire year, the rain falls for 178.1 days and collects up to 34.25" (870mm) of precipitation.Snowfall
March through November are months without snowfall.Daylight
In September, the average length of the day in Shenandoah is 12h and 20min.On the first day of September in Shenandoah, sunrise is at 6:59 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:08 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 6 in September transforms into this advice:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Shenandoah have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Shenandoah have in September?
What is the UV index intensity in September?
Average temperature in September
Shenandoah, TX
- Average high temperature in September: 89.4°F
The warmest month (with the highest average high temperature) is August (96.1°F).
The month with the lowest average high temperature is January (60.1°F).
- Average low temperature in September: 71.8°F
The month with the highest average low temperature is August (76.3°F).
The coldest month (with the lowest average low temperature) is January (43.9°F).
Average pressure in September
Shenandoah, 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
Shenandoah, TX
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is September (5.4mph).
Average humidity in September
Shenandoah, TX
- Average humidity in September: 72%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Shenandoah, TX
- Average rainfall in September: 3.54"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is November (1.89").
Average rainfall days in September
Shenandoah, TX
- Average rainfall days in September: 19.1 days
The month with the highest number of rainy days is September (19.1 days).
The month with the least rainy days is January (12.1 days).
Average snowfall in September
Shenandoah, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.16").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Shenandoah, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 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
Shenandoah, 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 August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Shenandoah, TX
- Average sunshine days in September: 9.1 days
The month with the most sunshine days is October (17.1 days).
The month with the least sunshine days is September (9.1 days).
Average UV index in September
Shenandoah, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Shenandoah, TX
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Shenandoah, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, June, August, September, October, November and December (6mi).
The months with the lowest visibility are February, March, April, May and July (5mi).
Shenandoah, Texas, USA
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