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 transition into September is accompanied by a temperature decrease, with the average high-temperature shifting from 84.4°F (29.1°C) in August to a still moderately hot 75°F (23.9°C). Contrasting the daytime warmth, Herriman's September nights cool down to an average of 52.3°F (11.3°C).Humidity
The average relative humidity in September is 41%.Rainfall
In Herriman, during September, the rain falls for 6.4 days and regularly aggregates up to 0.51" (13mm) of precipitation. Throughout the year, there are 86.1 rainfall days, and 6.61" (168mm) of precipitation is accumulated.Snowfall
In Herriman, snow does not fall in May through September.Daylight
In September, the average length of the day in Herriman is 12h and 26min.On the first day of September, sunrise is at 6:56 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:11 pm MDT.
Sunshine
The average sunshine in September is 10h.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 average individuals.Note: The UV index of 4 during September leads to these advisories:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. 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 is the temperature in September in Herriman?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September in Herriman?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Herriman, UT
- Average high temperature in September: 75°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 (33.4°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Herriman, 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
Herriman, UT
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is March (6.8mph).
The calmest month (with the lowest average wind speed) is January (5.1mph).
Average humidity in September
Herriman, UT
- Average humidity in September: 41%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is July (35%).
Average rainfall in September
Herriman, UT
- Average rainfall in September: 0.51"
The wettest months (with the highest rainfall) are March and April (0.71").
The driest month (with the least rainfall) is June (0.28").
Average rainfall days in September
Herriman, UT
- Average rainfall days in September: 6.4 days
The months with the highest number of rainy days are March and April (9.8 days).
The month with the least rainy days is November (5.2 days).
Average snowfall in September
Herriman, UT
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Herriman, UT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Herriman, 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 18min).
- Average sunshine in September: 10h and 0min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Herriman, UT
- Average sunshine days in September: 21 days
The month with the most sunshine days is June (23.1 days).
The months with the least sunshine days are February and April (16.3 days).
Average UV index in September
Herriman, UT
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Herriman, UT
- Average cloud cover in September: 12
The months with the most cloud cover are January and February (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Herriman, UT
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (4mi).
Herriman, Utah, USA
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