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's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's hot 89.2°F (31.8°C) to a moderately hot 83.3°F (28.5°C). An average low-temperature of 63°F (17.2°C) is observed during September nights in Duncan.Heat index
September's mean heat index is evaluated at 82.4°F (28°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.Understand that the heat index values take into account shaded locations and mild winds. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humidity
The average relative humidity in September in Duncan is 43%.Rainfall
In Duncan, during September, the rain falls for 12.1 days and regularly aggregates up to 1.61" (41mm) of precipitation. Throughout the year, there are 92.3 rainfall days, and 12.13" (308mm) of precipitation is accumulated.Snowfall
In Duncan, Arizona, snow does not fall in April through November.Daylight
In Duncan, the average length of the day in September is 12h and 22min.On the first day of September in Duncan, sunrise is at 5:51 am and sunset at 6:40 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 6:01 pm MST.
Sunshine
The average sunshine in September is 10.5h.UV index
In Duncan, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Duncan?
What is the average humidity in September in Duncan?
How many days does it rain in September in Duncan?
When it does not snow in Duncan?
What is the average length of the day in September in Duncan?
What time are sunrise and sunset in September in Duncan?
How long on average sun shines in September in Duncan?
What is the UV index reading in September in Duncan?
Average temperature in September
Duncan, AZ
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is June (91°F).
The month with the lowest average high temperature is December (52.7°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Duncan, AZ
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Duncan, AZ
- Average wind speed in September: 5.9mph
The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is December (5.1mph).
Average humidity in September
Duncan, AZ
- Average humidity in September: 43%
The month with the highest relative humidity is December (53%).
The month with the lowest relative humidity is June (22%).
Average rainfall in September
Duncan, AZ
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is July (2.44").
The driest month (with the least rainfall) is April (0.2").
Average rainfall days in September
Duncan, AZ
- Average rainfall days in September: 12.1 days
The months with the highest number of rainy days are July and August (16.8 days).
The month with the least rainy days is May (3.5 days).
Average snowfall in September
Duncan, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.87").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Duncan, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.9 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
Duncan, AZ
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 3min
The months with the most sunshine are June and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Duncan, AZ
- Average sunshine days in September: 14 days
The month with the most sunshine days is May (26.4 days).
The month with the least sunshine days is August (8.3 days).
Average UV index in September
Duncan, AZ
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Duncan, AZ
- Average cloud cover in September: 15
The month with the most cloud cover is December (Cloud cover 22).
The months with the least cloud cover are May and June (Cloud cover 9).
Average visibility in September
Duncan, AZ
- 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).
Duncan, Arizona, USA
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