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
A mild drop in Dewey's average high-temperature is observed in September, transitioning from a warm 80.1°F (26.7°C) in August to a still moderately hot 73.6°F (23.1°C). Dewey, during the nights of September, experiences an average temperature drop to a fresh 52.9°F (11.6°C).Humidity
The average relative humidity in September in Dewey, Utah, is 41%.Rainfall
In September, in Dewey, Utah, the rain falls for 12.5 days. Throughout September, 1.73" (44mm) of precipitation is accumulated. Throughout the year, in Dewey, there are 117.7 rainfall days, and 15.83" (402mm) of precipitation is accumulated.Snowfall
In Dewey, Utah, snow does not fall in May through September.Daylight
In Dewey, the average length of the day in September is 12h and 25min.On the first day of September in Dewey, sunrise is at 6:46 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:00 pm MDT.
Sunshine
The average sunshine in September in Dewey is 10.9h.UV index
In Dewey, Utah, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Dewey?
What is the average humidity in September in Dewey?
How much does it rain in Dewey in September?
When it does not snow in Dewey?
Does it snow in Dewey in September?
What is the average length of the day in September in Dewey?
When are sunrise and sunset in September in Dewey?
How long on average sun shines in September in Dewey?
How high is the UV index in September in Dewey?
Average temperature in September
Dewey, UT
- Average high temperature in September: 73.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in September
Dewey, UT
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Dewey, UT
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are April and June (8mph).
The calmest month (with the lowest average wind speed) is January (4.6mph).
Average humidity in September
Dewey, UT
- Average humidity in September: 41%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is June (29%).
Average rainfall in September
Dewey, UT
- Average rainfall in September: 1.73"
The wettest months (with the highest rainfall) are July and August (3.15").
The driest months (with the least rainfall) are January and February (0.51").
Average rainfall days in September
Dewey, UT
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is February (4 days).
Average snowfall in September
Dewey, UT
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Dewey, UT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 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
Dewey, UT
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in September
Dewey, UT
- Average sunshine days in September: 13.7 days
The months with the most sunshine days are January and November (23 days).
The month with the least sunshine days is July (8 days).
Average UV index in September
Dewey, 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 January (UV index 1).
Average cloud cover in September
Dewey, UT
- Average cloud cover in September: 12
The month with the most cloud cover is January (Cloud cover 31).
The months with the least cloud cover are June and September (Cloud cover 12).
Average visibility in September
Dewey, 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).
Dewey, Utah, USA
Weather forecast for your location
2. Allow the app to use your location