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
In Sierra Vista, the average high-temperature in September is almost the same as in August - a moderately hot 81.7°F (27.6°C). In Sierra Vista, in September, the average low-temperature is 63.1°F (17.3°C).Heat index
In September, the average heat index is calculated to be 82.4°F (28°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, differences in body mass, height, and shape, wind, and pregnancy affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
Humidity
With an average relative humidity of 50%, September is the most humid month.Rainfall
In Sierra Vista, Arizona, during 12.9 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. Throughout the year, there are 92.2 rainfall days, and 15.47" (393mm) of precipitation is accumulated.Snowfall
In Sierra Vista, Arizona, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 21min.On the first day of September in Sierra Vista, sunrise is at 5:56 am and sunset at 6:45 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 6:07 pm MST.
Sunshine
In Sierra Vista, the average sunshine in September is 9.9h.UV index
The average daily maximum UV index in September in Sierra Vista is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
FAQ
What is the temperature in September in Sierra Vista?
What is the most humid month in Sierra Vista?
What is the average humidity in September in Sierra Vista?
How much does it rain in Sierra Vista in September?
When it does not snow in Sierra Vista?
What is the average length of the day in September in Sierra Vista?
What time are sunrise and sunset in September in Sierra Vista?
How long on average sun shines in September in Sierra Vista?
What is the UV index intensity in September in Sierra Vista?
Average temperature in September
Sierra Vista, AZ
- Average high temperature in September: 81.7°F
The warmest month (with the highest average high temperature) is June (90.1°F).
The month with the lowest average high temperature is December (56.5°F).
- Average low temperature in September: 63.1°F
The month with the highest average low temperature is July (69.6°F).
The coldest months (with the lowest average low temperature) are January and December (37.8°F).
Average pressure in September
Sierra Vista, AZ
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Sierra Vista, AZ
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Sierra Vista, AZ
- Average humidity in September: 50%
The month with the highest relative humidity is September (50%).
The months with the lowest relative humidity are May and June (23%).
Average rainfall in September
Sierra Vista, 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 (0.12").
Average rainfall days in September
Sierra Vista, AZ
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is May (2.3 days).
Average snowfall in September
Sierra Vista, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Sierra Vista, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (1.3 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
Sierra Vista, AZ
- Average daylight in September: 12h and 21min
The month with the longest days is June (Average daylight: 14h and 10min).
The month with the shortest days is December (Average daylight: 10h and 8min).
- Average sunshine in September: 9h and 54min
The months with the most sunshine are June and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in September
Sierra Vista, AZ
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is May (28.1 days).
The month with the least sunshine days is July (6.5 days).
Average UV index in September
Sierra Vista, AZ
- Average UV index in September: 6
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Sierra Vista, 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 8).
Average visibility in September
Sierra Vista, 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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