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 the onset of September, the average high-temperature stands at a moderately hot 83.7°F (28.7°C), closely aligned with August's 87.1°F (30.6°C). September nights observe an average temperature dip to a comfortable 64.6°F (18.1°C).Heat index
The heat index for September is computed to be 84.2°F (29°C). A sense of exhaustion might occur with extended exposure and activity, potentially causing heat cramps.It is crucial to understand that heat index figures are for shade and gentle wind conditions. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. 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. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
The average relative humidity in September in Alto, Arizona, is 50%.Rainfall
In September, the rain falls for 12.2 days. Throughout September, 2.32" (59mm) of precipitation is accumulated. Throughout the year, in Alto, there are 87.8 rainfall days, and 15.43" (392mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
In Alto, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 5:59 am and sunset at 6:46 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 6:09 pm MST.
Sunshine
In Alto, Arizona, the average sunshine in September is 9.6h.UV index
In Alto, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
How hot does it get in Alto in September?
What is the average humidity in September in Alto?
How much does it rain in Alto in September?
When it does not snow in Alto?
What is the average length of the day in September in Alto?
What time are sunrise and sunset in September in Alto?
How many hours of sunshine does Alto have in September?
What is the UV index intensity in September in Alto?
Average temperature in September
Alto, AZ
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is June (91°F).
The month with the lowest average high temperature is December (59.2°F).
- Average low temperature in September: 64.6°F
The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is December (39.9°F).
Average pressure in September
Alto, AZ
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in September
Alto, AZ
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is May (9.9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Alto, AZ
- Average humidity in September: 50%
The month with the highest relative humidity is August (51%).
The months with the lowest relative humidity are May and June (24%).
Average rainfall in September
Alto, AZ
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is July (4.53").
The driest month (with the least rainfall) is May (0.16").
Average rainfall days in September
Alto, AZ
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is July (21.9 days).
The month with the least rainy days is May (1.8 days).
Average snowfall in September
Alto, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.06").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Alto, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 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
Alto, 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: 9h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in September
Alto, AZ
- Average sunshine days in September: 15 days
The month with the most sunshine days is May (28.8 days).
The month with the least sunshine days is July (6.6 days).
Average UV index in September
Alto, AZ
- Average UV index in September: 6
The months with the highest UV index are June and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in September
Alto, AZ
- Average cloud cover in September: 17
The month with the most cloud cover is July (Cloud cover 24).
The month with the least cloud cover is May (Cloud cover 7).
Average visibility in September
Alto, 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).
Alto, Arizona, USA
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