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 presence records an average high-temperature of a still warm 79.5°F (26.4°C), closely mirroring August's climate. Throughout the month of September, the average temperature in Saint Johns, Arizona, dips to a moderate 59.2°F (15.1°C) at night.Humidity
In September, the average relative humidity is 39%.Rainfall
In Saint Johns, Arizona, in September, during 6.4 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. Throughout the year, in Saint Johns, there are 67.8 rainfall days, and 6.34" (161mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Saint Johns.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 5:51 am and sunset at 6:43 pm. On the last day of September, sunrise is at 6:11 am and sunset at 6:02 pm MST.
Sunshine
The average sunshine in September in Saint Johns, Arizona, is 10.7h.UV index
In Saint Johns, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What is the temperature in September in Saint Johns?
What is the average humidity in September in Saint Johns?
How many days does it rain in September in Saint Johns?
When it does not snow in Saint Johns?
What is the average length of the day in September in Saint Johns?
When are sunrise and sunset in September in Saint Johns?
How long on average sun shines in September in Saint Johns?
What is the UV index reading in September in Saint Johns?
Average temperature in September
Saint Johns, AZ
- Average high temperature in September: 79.5°F
The warmest months (with the highest average high temperature) are June and July (86.5°F).
The month with the lowest average high temperature is January (45.5°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).
Average pressure in September
Saint Johns, AZ
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Saint Johns, AZ
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is January (6.2mph).
Average humidity in September
Saint Johns, AZ
- Average humidity in September: 39%
The month with the highest relative humidity is January (61%).
The month with the lowest relative humidity is June (21%).
Average rainfall in September
Saint Johns, AZ
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is July (0.83").
The driest months (with the least rainfall) are May and June (0.28").
Average rainfall days in September
Saint Johns, AZ
- Average rainfall days in September: 6.4 days
The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is November (2.9 days).
Average snowfall in September
Saint Johns, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.44").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Saint Johns, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (4.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Johns, 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: 10h and 4min
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
Saint Johns, AZ
- Average sunshine days in September: 22 days
The month with the most sunshine days is June (25.8 days).
The month with the least sunshine days is July (17.4 days).
Average UV index in September
Saint Johns, AZ
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in September
Saint Johns, AZ
- Average cloud cover in September: 11
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 9).
Average visibility in September
Saint Johns, 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).
Saint Johns, Arizona, USA
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