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 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
Swansea's September weather features a light decline in high-temperatures, reducing from 103.6°F (39.8°C) in August to a still sweltering 96.8°F (36°C). Nighttime temperature lowers to an average of 79.9°F (26.6°C) in September.Humidity
In September, the average relative humidity in Swansea is 25%.Rainfall
In Swansea, in September, during 4.8 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 39.4 rainfall days, and 3.9" (99mm) of precipitation is accumulated.Daylight
In September, the average length of the day in Swansea is 12h and 22min.On the first day of September in Swansea, sunrise is at 6:09 am and sunset at 7:00 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 6:20 pm MST.
Sunshine
The average sunshine in September is 9.8h.UV index
In Swansea, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a regular UV index of 7 translates into these guidelines:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Frequently asked questions
How hot is it in Swansea in September?
What is the average humidity in September in Swansea?
How much does it rain in Swansea in September?
How many hours of daylight does Swansea have in September?
When are sunrise and sunset in September in Swansea?
How many hours of sunshine does Swansea have in September?
What is the UV index reading in September in Swansea?
Average temperature in September
Swansea, AZ
- Average high temperature in September: 96.8°F
The warmest month (with the highest average high temperature) is July (104.2°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in September: 79.9°F
The month with the highest average low temperature is August (85.6°F).
The coldest month (with the lowest average low temperature) is December (47.1°F).
Average pressure in September
Swansea, AZ
- Average pressure in September: 29.81"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.74"Hg).
Average wind speed in September
Swansea, AZ
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is November (5.8mph).
Average humidity in September
Swansea, AZ
- Average humidity in September: 25%
The months with the highest relative humidity are January and December (39%).
The month with the lowest relative humidity is June (15%).
Average rainfall in September
Swansea, AZ
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is July (0.59").
The driest months (with the least rainfall) are May and June (0.04").
Average rainfall days in September
Swansea, AZ
- Average rainfall days in September: 4.8 days
The month with the highest number of rainy days is July (7.8 days).
The month with the least rainy days is May (1.2 days).
Average daylight in September /
Average sunshine in September
Swansea, AZ
- Average daylight in September: 12h and 2min
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 5min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Swansea, AZ
- Average sunshine days in September: 23 days
The month with the most sunshine days is May (29.3 days).
The month with the least sunshine days is July (20.2 days).
Average UV index in September
Swansea, AZ
- Average UV index in September: 7
The month with the highest UV index is July (UV index 9).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Swansea, AZ
- Average cloud cover in September: 7
The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in September
Swansea, 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).
Swansea, Arizona, USA
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