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 is marked by a minor reduction in average high-temperature, sliding from a fiery hot 95.7°F (35.4°C) in August to a hot 88.7°F (31.5°C). Caldwell's temperature drops to an average low of 70.5°F (21.4°C) during the nights of September.Heat index
The heat index value during September is appraised at a very hot 102.2°F (39°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to 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.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.
Humidity
In September, the average relative humidity is 71%.Rainfall
In September, the rain falls for 13.5 days. Throughout September, 1.69" (43mm) of precipitation is accumulated. Throughout the year, there are 126.1 rainfall days, and 16.14" (410mm) of precipitation is accumulated.Snowfall
In Caldwell, snow does not fall in March through November.Daylight
In Caldwell, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:03 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:12 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 threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 6 in September translates into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. 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. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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 Caldwell have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Caldwell have in September?
What is the UV index intensity in September?
Average temperature in September
Caldwell, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (95.7°F).
The month with the lowest average high temperature is January (58.5°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Caldwell, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are May and June (29.93"Hg).
Average wind speed in September
Caldwell, TX
- Average wind speed in September: 5.9mph
The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is September (5.9mph).
Average humidity in September
Caldwell, TX
- Average humidity in September: 71%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (65%).
Average rainfall in September
Caldwell, TX
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (2.56").
The driest months (with the least rainfall) are January and February (0.71").
Average rainfall days in September
Caldwell, TX
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is September (13.5 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in September
Caldwell, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Caldwell, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Caldwell, 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 12min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Caldwell, TX
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is October (20.4 days).
The month with the least sunshine days is September (13.8 days).
Average UV index in September
Caldwell, 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
Caldwell, TX
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Caldwell, 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).
Caldwell, Texas, USA
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