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
With September's arrival, Caldwell's weather records an average high-temperature of a warm 83.3°F (28.5°C), marking little difference from August's 87.4°F (30.8°C). Caldwell witnesses an average low-temperature of 64.9°F (18.3°C) throughout the month of September.Heat index
The heat index in September is calculated to be a tropical 89.6°F (32°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humidity
The average relative humidity in September is 73%.Rainfall
The month with the least rainfall in Caldwell is September, when the rain falls for 10.6 days and typically collects 0.75" (19mm) of precipitation.Snowfall
In Caldwell, snow does not fall in April through September.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September in Caldwell, sunrise is at 6:36 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:48 pm CDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
In Caldwell, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Frequently asked questions
Is it hot in Caldwell during September?
What is the average humidity in September in Caldwell?
What is the driest month in Caldwell?
How many days does it rain in September in Caldwell?
When it does not snow in Caldwell?
Does it snow in Caldwell in September?
How many hours of daylight does Caldwell have in September?
What time are sunrise and sunset in September in Caldwell?
How long on average sun shines in September in Caldwell?
What is the UV index reading in September in Caldwell?
Average temperature in September
Caldwell, AR
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (46.9°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (34.2°F).
Average pressure in September
Caldwell, AR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Caldwell, AR
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Caldwell, AR
- Average humidity in September: 73%
The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Caldwell, AR
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is April (1.81").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in September
Caldwell, AR
- Average rainfall days in September: 10.6 days
The months with the highest number of rainy days are May, July and August (13.3 days).
The month with the least rainy days is November (7.4 days).
Average snowfall in September
Caldwell, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Caldwell, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Caldwell, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Caldwell, AR
- Average sunshine days in September: 17.4 days
The months with the most sunshine days are October and November (21.4 days).
The month with the least sunshine days is August (14.2 days).
Average UV index in September
Caldwell, AR
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Caldwell, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Caldwell, AR
- 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, Arkansas, USA
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