September weather forecastTonto Basin, AZ
September
Weather in September
The first month of the autumn, September, is still a warm month in Tonto Basin, Arizona, with an average temperature fluctuating between 81.5°F (27.5°C) and 59°F (15°C).Temperature
September is characterized by a mild reduction in the average high-temperature, from a tropical 87.1°F (30.6°C) in August to a warm 81.5°F (27.5°C). With a significant temperature contrast, nighttime temperatures in Tonto Basin hover around an average low of 59°F (15°C) in September.Heat index
In September, the heat index is estimated at 80.6°F (27°C). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.For clarity, heat index numbers account for light winds and areas under shade. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
In Tonto Basin, Arizona, the average relative humidity in September is 43%.Rainfall
In Tonto Basin, in September, during 10.4 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, there are 85.7 rainfall days, and 15.31" (389mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 5:59 am and sunset at 6:50 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 6:10 pm MST.
Sunshine
In Tonto Basin, the average sunshine in September is 9.7h.UV index
In September, the average daily maximum UV index in Tonto Basin is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tonto Basin, AZ
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (50.2°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is July (64.6°F).
The coldest months (with the lowest average low temperature) are January and December (31.5°F).
Average pressure in September
Tonto Basin, AZ
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Tonto Basin, AZ
- Average wind speed in September: 5.4mph
The windiest months (with the highest average wind speed) are April and May (7.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Tonto Basin, AZ
- Average humidity in September: 43%
The months with the highest relative humidity are January and December (58%).
The month with the lowest relative humidity is June (24%).
Average rainfall in September
Tonto Basin, AZ
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is June (0.24").
Average rainfall days in September
Tonto Basin, AZ
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is June (3.3 days).
Average snowfall in September
Tonto Basin, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Tonto Basin, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (4.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Tonto Basin, AZ
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 42min
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 36min).
Average sunshine days in September
Tonto Basin, AZ
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is November (25.8 days).
The month with the least sunshine days is July (9.1 days).
Average UV index in September
Tonto Basin, AZ
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Tonto Basin, AZ
- Average cloud cover in September: 12
The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is June (Cloud cover 7).
Average visibility in September
Tonto Basin, 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).
