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
Summit's progression into September involves a minor drop in the average high-temperature, slightly receding from a moderately hot 79.2°F (26.2°C) in August to a pleasant 72.3°F (22.4°C). Despite a stark disparity with daily highs, Summit records an average nighttime temperature of 50.4°F (10.2°C) in September.Humidity
In September, the average relative humidity is 39%.Rainfall
In Summit, during September, the rain falls for 7.2 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 78.4 rainfall days, and 11.61" (295mm) of precipitation is accumulated.Snowfall
In Summit, snow does not fall in June through September.Daylight
In Summit, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 7:02 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:15 pm MDT.
Sunshine
The average sunshine in September is 9.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Prioritize safety - Recommendations to avert sunburn are shared. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in Summit in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Summit have in September?
What is the UV index reading in September?
Average temperature in September
Summit, UT
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The months with the lowest average high temperature are January and December (35.4°F).
- Average low temperature in September: 50.4°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is December (18.9°F).
Average pressure in September
Summit, UT
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Summit, UT
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is June (8.1mph).
The calmest month (with the lowest average wind speed) is January (5.4mph).
Average humidity in September
Summit, UT
- Average humidity in September: 39%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is June (27%).
Average rainfall in September
Summit, UT
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is June (0.2").
Average rainfall days in September
Summit, UT
- Average rainfall days in September: 7.2 days
The month with the highest number of rainy days is July (11.9 days).
The month with the least rainy days is June (2.7 days).
Average snowfall in September
Summit, UT
- Average snowfall in September: 0"
The month with the highest snowfall is December (8.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Summit, UT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Summit, UT
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are June and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Summit, UT
- Average sunshine days in September: 21 days
The month with the most sunshine days is June (25.8 days).
The month with the least sunshine days is July (16 days).
Average UV index in September
Summit, UT
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Summit, UT
- Average cloud cover in September: 10
The month with the most cloud cover is December (Cloud cover 31).
The month with the least cloud cover is June (Cloud cover 9).
Average visibility in September
Summit, UT
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Summit, Utah, USA
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