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
The onset of September is marked by a minor decrease in temperature, transitioning from a hot 92.1°F (33.4°C) in August to a still tropical 86.7°F (30.4°C). The low-temperature averages to an enjoyable 66.9°F (19.4°C) during the nights of September.Heat index
For most parts of September, the heat index is calculated to be a hot 86°F (30°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.It is crucial to understand that heat index figures are for shade and gentle wind conditions. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humidity
In September, the average relative humidity in Pima, Arizona, is 41%.Rainfall
In Pima, during September, the rain falls for 9 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, there are 78.6 rainfall days, and 8.39" (213mm) of precipitation is accumulated.Snowfall
In Pima, Arizona, snow does not fall in March through November.Daylight
In September, the average length of the day in Pima is 12h and 22min.On the first day of September, sunrise is at 5:54 am and sunset at 6:43 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 6:04 pm MST.
Sunshine
The average sunshine in September in Pima is 10.4h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Pima during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Pima, AZ
- Average high temperature in September: 86.7°F
The warmest month (with the highest average high temperature) is June (94.3°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in September: 66.9°F
The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).
Average pressure in September
Pima, AZ
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Pima, AZ
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest months (with the lowest average wind speed) are January and December (5.4mph).
Average humidity in September
Pima, AZ
- Average humidity in September: 41%
The month with the highest relative humidity is December (51%).
The month with the lowest relative humidity is June (20%).
Average rainfall in September
Pima, AZ
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is July (1.22").
The driest month (with the least rainfall) is May (0.12").
Average rainfall days in September
Pima, AZ
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is July (14.5 days).
The month with the least rainy days is May (2.7 days).
Average snowfall in September
Pima, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.31").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Pima, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Pima, AZ
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 2min
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
Pima, AZ
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is May (27.3 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Pima, AZ
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Pima, AZ
- Average cloud cover in September: 13
The month with the most cloud cover is December (Cloud cover 20).
The months with the least cloud cover are May and June (Cloud cover 8).
Average visibility in September
Pima, 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).
Pima, Arizona, USA
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