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 transition from August to September sees average high-temperatures adjusting to a warm 85.6°F (29.8°C), from a not significantly different 91°F (32.8°C). In Swift Trail Junction, in September, the average low-temperature is an enjoyable 66.4°F (19.1°C).Heat index
In September, the average heat index is evaluated at 84.2°F (29°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.One should consider that heat index numbers are for shaded settings and light wind. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. 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 September, the average relative humidity is 40%.Rainfall
In Swift Trail Junction, Arizona, in September, during 9.8 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Swift Trail Junction, during the entire year, the rain falls for 79.6 days and collects up to 8.58" (218mm) of precipitation.Snowfall
Months with snowfall are January, February, September and December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Swift Trail Junction, during the entire year, snow falls for 1.3 days and aggregates up to 0.75" (19mm) of snow.Daylight
In September, the average length of the day in Swift Trail Junction is 12h and 22min.On the first day of September in Swift Trail Junction, Arizona, sunrise is at 5:54 am and sunset at 6:43 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 6:04 pm MST.
Sunshine
In September, the average sunshine in Swift Trail Junction is 10.4h.UV index
In Swift Trail Junction, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 6 suggests these recommendations:
Shield from overexposure. Defense against sun-related harm is required. 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. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Swift Trail Junction during September?
What is the average humidity in September in Swift Trail Junction?
How many days does it rain in September in Swift Trail Junction?
When does it start to snow in Swift Trail Junction?
How many hours of daylight does Swift Trail Junction have in September?
When is the sunrise / sunset in September in Swift Trail Junction?
How many hours of sunshine does Swift Trail Junction have in September?
What is the UV index reading in September in Swift Trail Junction?
Average temperature in September
Swift Trail Junction, AZ
- Average high temperature in September: 85.6°F
The warmest month (with the highest average high temperature) is June (93.2°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in September: 66.4°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).
Average pressure in September
Swift Trail Junction, 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
Swift Trail Junction, AZ
- Average wind speed in September: 5.7mph
The windiest months (with the highest average wind speed) are April and May (7.5mph).
The calmest months (with the lowest average wind speed) are January and December (5.2mph).
Average humidity in September
Swift Trail Junction, AZ
- Average humidity in September: 40%
The month with the highest relative humidity is December (51%).
The month with the lowest relative humidity is June (20%).
Average rainfall in September
Swift Trail Junction, AZ
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is July (1.3").
The driest months (with the least rainfall) are April and May (0.16").
Average rainfall days in September
Swift Trail Junction, AZ
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is May (3.2 days).
Average snowfall in September
Swift Trail Junction, AZ
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (0.39").
The months with the least snowfall are March, April, May, June, July, August, October and November (0").
Average snowfall days in September
Swift Trail Junction, AZ
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
Swift Trail Junction, 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 months with the most sunshine are June and August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Swift Trail Junction, AZ
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is May (26.7 days).
The month with the least sunshine days is July (12.6 days).
Average UV index in September
Swift Trail Junction, 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
Swift Trail Junction, AZ
- Average cloud cover in September: 14
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
Swift Trail Junction, 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).
Swift Trail Junction, Arizona, USA
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