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
September's arrival aligns with a minor decrease in average high-temperatures, from August's hot 91.2°F (32.9°C) to a warm 85.8°F (29.9°C). Throughout September nights, Calva registers an average low-temperature of 66°F (18.9°C).Heat index
The heat index value during September is evaluated at a tropical 86°F (30°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.The heat index's values are generally associated with conditions in shade and light breezes. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humidity
In Calva, Arizona, the average relative humidity in September is 40%.Rainfall
In Calva, during September, the rain falls for 8.7 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, there are 75.1 rainfall days, and 8.82" (224mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
In September, the average length of the day in Calva, Arizona, is 12h and 22min.On the first day of the month, sunrise is at 5:55 am and sunset at 6:45 pm. On the last day of September, sunrise is at 6:14 am and sunset at 6:06 pm MST.
Sunshine
In Calva, the average sunshine in September is 10h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The UV index of 6 during September translates into the following guidance:
Guard against overexposure. Protection from sun-induced harm is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
How hot is it in Calva in September?
What is the average humidity in September in Calva?
How much does it rain in Calva in September?
When it does not snow in Calva?
How many hours of daylight does Calva have in September?
What time are sunrise and sunset in September in Calva?
How long on average sun shines in September in Calva?
What is the UV index reading in September in Calva?
Average temperature in September
Calva, AZ
- Average high temperature in September: 85.8°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in September: 66°F
The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is December (36.9°F).
Average pressure in September
Calva, AZ
- Average pressure in September: 29.93"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
Calva, AZ
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest months (with the lowest average wind speed) are August and December (5.2mph).
Average humidity in September
Calva, AZ
- Average humidity in September: 40%
The month with the highest relative humidity is December (53%).
The month with the lowest relative humidity is June (21%).
Average rainfall in September
Calva, AZ
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is August (1.22").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in September
Calva, AZ
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is June (2.9 days).
Average snowfall in September
Calva, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Calva, AZ
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
Calva, 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 0min
The month with the most sunshine is August (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Calva, AZ
- Average sunshine days in September: 18.2 days
The month with the most sunshine days is May (26.8 days).
The month with the least sunshine days is July (13.1 days).
Average UV index in September
Calva, AZ
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Calva, AZ
- Average cloud cover in September: 13
The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is June (Cloud cover 7).
Average visibility in September
Calva, 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).
Calva, Arizona, USA
Weather forecast for your location
2. Allow the app to use your location
