September weather forecastGreen Valley, AZ
September
Weather in September
September, the first month of the autumn in Green Valley, is still a tropical month, with an average temperature ranging between max 88.5°F (31.4°C) and min 69.8°F (21°C).Temperature
Green Valley's weather in September displays an average high-temperature of a still tropical 88.5°F (31.4°C), showing minor disparity from August's 92.7°F (33.7°C). During the month of September, Green Valley experiences a steady low-temperature average of 69.8°F (21°C).Heat index
September's heat index is appraised at a hot 89.6°F (32°C). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humidity
In Green Valley, the average relative humidity in September is 42%.Rainfall
In Green Valley, in September, it is raining for 8.6 days, with typically 0.94" (24mm) of accumulated precipitation. In Green Valley, during the entire year, the rain falls for 61.6 days and collects up to 5.87" (149mm) of precipitation.Snowfall
In Green Valley, snow does not fall in February through December.Daylight
In Green Valley, the average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 5:59 am and sunset at 6:47 pm. On the last day of September, in Green Valley, sunrise is at 6:17 am and sunset at 6:09 pm MST.
Sunshine
In Green Valley, the average sunshine in September is 9.7h.UV index
The months with the highest UV index in Green Valley are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 7 suggests this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Green Valley, AZ
- Average high temperature in September: 88.5°F
The warmest month (with the highest average high temperature) is June (95.5°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in September: 69.8°F
The month with the highest average low temperature is July (75.4°F).
The coldest month (with the lowest average low temperature) is December (43°F).
Average pressure in September
Green Valley, 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
Green Valley, AZ
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are April and May (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Green Valley, AZ
- Average humidity in September: 42%
The month with the highest relative humidity is December (44%).
The months with the lowest relative humidity are May and June (21%).
Average rainfall in September
Green Valley, AZ
- Average rainfall in September: 0.94"
The wettest months (with the highest rainfall) are July and August (1.3").
The driest months (with the least rainfall) are April and May (0.12").
Average rainfall days in September
Green Valley, AZ
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is May (1.4 days).
Average snowfall in September
Green Valley, 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
Green Valley, AZ
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January, September and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
Green Valley, AZ
- Average daylight in September: 12h and 18min
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 42min
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
Green Valley, AZ
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is May (29.3 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Green Valley, AZ
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Green Valley, AZ
- Average cloud cover in September: 14
The months with the most cloud cover are July and December (Cloud cover 19).
The months with the least cloud cover are May and June (Cloud cover 7).
Average visibility in September
Green Valley, 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).
