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 introduces a moderate change in Saint John's weather, with average high-temperatures falling from August's moderately hot 84.4°F (29.1°C) to a still warm 74.5°F (23.6°C). In September, the average low-temperature records at a cool 54.5°F (12.5°C) during the nights.Humidity
The average relative humidity in September in Saint John, Utah, is 39%.Rainfall
In Saint John, in September, it is raining for 10.7 days, with typically 1.38" (35mm) of accumulated precipitation. In Saint John, during the entire year, the rain falls for 120.7 days and collects up to 18.39" (467mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Saint John, Utah. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Saint John, Utah, during the entire year, snow falls for 68.4 days and aggregates up to 55.94" (1421mm) of snow.Daylight
The average length of the day in September in Saint John is 12h and 26min.On the first day of the month, sunrise is at 6:58 am and sunset at 8:01 pm. On the last day of September, in Saint John, sunrise is at 7:26 am and sunset at 7:13 pm MDT.
Sunshine
The average sunshine in September is 9.8h.UV index
In Saint John, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during September translates into the following guidance:
Undertake protective steps - Recommendations to avoid sunburn are issued. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What is the average September temperature in Saint John?
What is the average humidity in September in Saint John?
How much does it rain in Saint John in September?
When does it start to snow in Saint John?
What is the average length of the day in September in Saint John?
When is the sunrise / sunset in September in Saint John?
How long on average sun shines in September in Saint John?
What is the UV index reading in September in Saint John?
Average temperature in September
Saint John, UT
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Saint John, UT
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Saint John, UT
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (7.7mph).
The calmest month (with the lowest average wind speed) is January (5.3mph).
Average humidity in September
Saint John, UT
- Average humidity in September: 39%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (33%).
Average rainfall in September
Saint John, UT
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is April (2.09").
The driest month (with the least rainfall) is June (0.79").
Average rainfall days in September
Saint John, UT
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (13.3 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in September
Saint John, UT
- Average snowfall in September: 0.04"
The months with the highest snowfall are January and December (12.99").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Saint John, UT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Saint John, UT
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Saint John, UT
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is February (11.6 days).
Average UV index in September
Saint John, UT
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Saint John, UT
- Average cloud cover in September: 13
The month with the most cloud cover is January (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Saint John, UT
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Saint John, Utah, USA
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