September weather forecastSouth Tucson, AZ
September
Weather in September
September, the first month of the autumn in South Tucson, is also a hot month, with temperature in the range of an average low of 70.7°F (21.5°C) and an average high of 88.7°F (31.5°C).Temperature
South Tucson's weather in September displays an average high-temperature of a still hot 88.7°F (31.5°C), showing minor disparity from August's 93.9°F (34.4°C). Throughout the September nights, South Tucson encounters a low-temperature of 70.7°F (21.5°C).Heat index
In September, the heat index is computed to be a hot 89.6°F (32°C). Persistent activity under exposure might lead to a feeling of weariness, with subsequent heat cramps.Observations indicate that the heat index values are for shady locations with light wind. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Humidity
In South Tucson, the average relative humidity in September is 40%.Rainfall
In September, the rain falls for 8.6 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. In South Tucson, during the entire year, the rain falls for 66.1 days and collects up to 7.95" (202mm) of precipitation.Snowfall
In South Tucson, Arizona, snow does not fall in February through December.Daylight
In South Tucson, 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 6:47 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 6:09 pm MST.
Sunshine
The average sunshine in September is 9.8h.UV index
The average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a daily UV index of 7 turns into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Tucson, AZ
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is June (96.6°F).
The month with the lowest average high temperature is December (60.8°F).
- Average low temperature in September: 70.7°F
The month with the highest average low temperature is July (77°F).
The coldest months (with the lowest average low temperature) are January and December (43°F).
Average pressure in September
South Tucson, AZ
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
South Tucson, AZ
- Average wind speed in September: 6.1mph
The windiest months (with the highest average wind speed) are April and May (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
South Tucson, AZ
- Average humidity in September: 40%
The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (19%).
Average rainfall in September
South Tucson, AZ
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is July (1.42").
The driest month (with the least rainfall) is May (0.08").
Average rainfall days in September
South Tucson, AZ
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is May (1.3 days).
Average snowfall in September
South Tucson, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
South Tucson, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
South Tucson, AZ
- Average daylight in September: 12h and 24min
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 48min
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 0min).
Average sunshine days in September
South Tucson, AZ
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is May (29.3 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in September
South Tucson, AZ
- Average UV index in September: 7
The month with the highest UV index is June (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
South Tucson, AZ
- Average cloud cover in September: 13
The month with the most cloud cover is December (Cloud cover 19).
The months with the least cloud cover are May and June (Cloud cover 7).
Average visibility in September
South Tucson, 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).
