September weather forecast
Douglas, AZ

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The densely populated town of Agua Prieta in Douglas City, Arizona
The densely populated town of Agua Prieta in Douglas City, Arizona

Weather in September

September gifts Douglas with the first indication of autumn’s approaching coolness. The weather gradually evolves, bridging the gap between the intense heat of previous months and the forthcoming coolness. However, September continues to retain much of summer's warmth. The recorded average high temperature drops to a more bearable 85.1°F (29.5°C). The vibrant fall colors start to emerge, beautifully offsetting the still-dominant summer hues.

Temperature

Douglas's weather in September indicates an average high-temperature of a warm 85.1°F (29.5°C), nearly consistent with the 89.6°F (32°C) of August. In the month of September, Douglas records a consistent average low-temperature of 65.5°F (18.6°C).

Heat index

The heat index value during September is calculated to be a hot 86°F (30°C). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.
The standards for the heat index are set for locations in shade and under light breezes. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are essentially critical for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

The average relative humidity in September is 46%.

Rainfall

In Douglas, during September, the rain falls for 10.5 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Douglas, during the entire year, the rain falls for 80.7 days and collects up to 9.33" (237mm) of precipitation.

Snowfall

March through November are months without snowfall in Douglas.

Daylight

The average length of the day in September in Douglas is 12h and 20min.
On the first day of September in Douglas, sunrise is at 5:54 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 6:04 pm MST.

Sunshine

In Douglas, the average sunshine in September is 10.3h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes 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:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
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Frequently asked questions

How hot is it in Douglas in September?

An average high-temperature, in September, in Douglas, is 85.1°F (29.5°C) and the average low-temperature is 65.5°F (18.6°C). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 86°F (30°C).

What is the average humidity in September in Douglas?

In September, the average relative humidity in Douglas, Arizona, is 46%.

How much does it rain in Douglas in September?

In Douglas, Arizona, in September, it is raining for 10.5 days, with typically 1.1" (28mm) of accumulated precipitation.

When it does not snow in Douglas?

In Douglas, snow does not fall in March through November.

What is the average length of the day in September in Douglas?

The average day length in September in Douglas, Arizona, is 12h and 20min.

What time are sunrise and sunset in September in Douglas?

On the first day of September in Douglas, Arizona, sunrise is at 5:54 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 6:04 pm MST.

How long on average sun shines in September in Douglas?

The average sunshine duration in September is 10.3h.

How high is the UV index in September in Douglas?

In Douglas, Arizona, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Douglas, AZ

Average temperature in September - Douglas, AZ
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is June (93.2°F).
The month with the lowest average high temperature is December (57.9°F).

  • Average low temperature in September: 65.5°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).

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Average pressure in September
Douglas, AZ

Average pressure in September - Douglas, AZ
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in September
Douglas, AZ

Average wind speed in September - Douglas, AZ
  • Average wind speed in September: 6.1mph

The windiest month (with the highest average wind speed) is May (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in September
Douglas, AZ

Average humidity in September - Douglas, AZ
  • Average humidity in September: 46%

The month with the highest relative humidity is December (49%).
The month with the lowest relative humidity is May (22%).

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Average rainfall in September
Douglas, AZ

Average rainfall in September - Douglas, AZ
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is July (2.44").
The driest months (with the least rainfall) are April and May (0.08").

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Average rainfall days in September
Douglas, AZ

Average rainfall days in September - Douglas, AZ
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is May (1.8 days).

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Average snowfall in September
Douglas, AZ

Average snowfall in September - Douglas, AZ
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.47").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Douglas, AZ

Average snowfall days in September - Douglas, AZ
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are February and December (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in September /
Average sunshine in September
Douglas, AZ

Average daylight in September / Average sunshine in September - Douglas, AZ
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).

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Average sunshine days in September
Douglas, AZ

Average sunshine days in September - Douglas, AZ
  • Average sunshine days in September: 15.9 days

The month with the most sunshine days is May (28.9 days).
The month with the least sunshine days is July (7.2 days).

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Average UV index in September
Douglas, AZ

Average UV index in September - Douglas, AZ
  • Average UV index in September: 6

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).

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Average cloud cover in September
Douglas, AZ

Average cloud cover in September - Douglas, AZ
  • Average cloud cover in September: 15

The month with the most cloud cover is July (Cloud cover 21).
The month with the least cloud cover is May (Cloud cover 6).

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Average visibility in September
Douglas, AZ

Average visibility in September - Douglas, 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).

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Douglas, Arizona, USA

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