September weather forecastRillito, AZ
September
Weather in September
September, the first month of the autumn in Rillito, is still a hot month, with an average temperature fluctuating between 74.1°F (23.4°C) and 91.9°F (33.3°C).Temperature
September denotes a minimal variation in the average high-temperature to a tropical 91.9°F (33.3°C) from August's 97°F (36.1°C). Rillito records an average low-temperature of 74.1°F (23.4°C) throughout the month of September.Humidity
The average relative humidity in September in Rillito, Arizona, is 37%.Rainfall
In September, in Rillito, Arizona, the rain falls for 9.6 days. Throughout September, 1.34" (34mm) of precipitation is accumulated. Throughout the year, in Rillito, there are 71.5 rainfall days, and 9.72" (247mm) of precipitation is accumulated.Daylight
In Rillito, Arizona, 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 in Rillito is 9.6h.UV index
In September, the average daily maximum UV index in Rillito is 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 7 translates into these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rillito, AZ
- Average high temperature in September: 91.9°F
The warmest month (with the highest average high temperature) is June (99°F).
The month with the lowest average high temperature is December (61.9°F).
- Average low temperature in September: 74.1°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is December (44.6°F).
Average pressure in September
Rillito, AZ
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in September
Rillito, AZ
- Average wind speed in September: 5.9mph
The windiest months (with the highest average wind speed) are April and May (7.9mph).
The calmest months (with the lowest average wind speed) are January and December (5.5mph).
Average humidity in September
Rillito, AZ
- Average humidity in September: 37%
The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (18%).
Average rainfall in September
Rillito, AZ
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is August (1.77").
The driest months (with the least rainfall) are April and May (0.2").
Average rainfall days in September
Rillito, AZ
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is May (2.4 days).
Average daylight in September /
Average sunshine in September
Rillito, 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 36min
The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Rillito, AZ
- Average sunshine days in September: 18 days
The month with the most sunshine days is May (28.2 days).
The month with the least sunshine days is July (13 days).
Average UV index in September
Rillito, AZ
- Average UV index in September: 7
The months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Rillito, AZ
- Average cloud cover in September: 13
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 7).
Average visibility in September
Rillito, 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).
