Dewey, UT
Unincorporated community in Grand County, Utah
Dewey is a small unincorporated community in Grand County, Utah. It is 13.3 miles S of Castle Valley, the nearest town. Its ZIP code is 84515.
Dewey at a glance
- State
- Utah
- County
- Grand County
- ZIP code
- 84515
- Nearest town
- Castle Valley (13.3 mi)
- Time zone
- America/Denver
- Coordinates
- 38.8103, -109.3011
Weather in Dewey now
Loading the National Weather Service forecast…
Dewey weather by the hour
Dewey weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Dewey.
This week in Dewey
Sunrise, sunset and moon in Dewey
What is the weather usually like in Dewey?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 101°F average high
- Januarycoldest month · 16°F average low
- 9.8 inprecipitation per year · 250 mm
- 15.1 insnowfall per year · 38 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Dewey: April–May and September–October, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station DEWEY, UT US (USC00422150), adjusted for the elevation of Dewey.
Dewey weather month by month
Sunrise and sunset in Dewey through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:32 AM | 5:21 PM | 9 h 48 min |
| February | 7:06 AM | 5:56 PM | 10 h 49 min |
| March | 7:26 AM | 7:25 PM | 11 h 59 min |
| April | 6:38 AM | 7:55 PM | 13 h 16 min |
| May | 6:03 AM | 8:24 PM | 14 h 21 min |
| June | 5:50 AM | 8:45 PM | 14 h 55 min |
| July | 6:03 AM | 8:43 PM | 14 h 39 min |
| August | 6:29 AM | 8:13 PM | 13 h 43 min |
| September | 6:57 AM | 7:26 PM | 12 h 29 min |
| October | 7:25 AM | 6:40 PM | 11 h 14 min |
| November | 6:58 AM | 5:05 PM | 10 h 6 min |
| December | 7:26 AM | 4:57 PM | 9 h 31 min |
Times for the 15th of each month, local time (America/Denver).
What is the weather like in Dewey?
Dewey has a cold semi-arid climate. The warmest month is July, with an average high of 101°F (38°C), and the coldest is January, with average lows of 16°F (-9°C).
It gets about 9.8 inches (250 mm) of precipitation a year. The wettest month is October and the driest is June. Snow is common: about 15 inches fall in an average year.
The best time to visit Dewey is April–May and September–October. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near Dewey
The closest live webcam is Grand, 10.5 miles NW of Dewey.
Webcams: Windy.com. Distances in a straight line from Dewey.
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Map of Dewey, UT
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Dewey Street View
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Questions about Dewey
Where is Dewey, UT?
Dewey is an unincorporated community in Grand County, Utah, 13.3 miles S of Castle Valley.
What county is Dewey in?
Dewey is in Grand County, Utah.
What is the ZIP code of Dewey, UT?
The ZIP code for Dewey is 84515.
What is the nearest town to Dewey?
Castle Valley, 13.3 miles away.
Are there webcams near Dewey?
Yes. The closest is Grand, 10.5 miles away.
What is the hottest month in Dewey?
July, with an average high of 101°F (38°C).
What is the coldest month in Dewey?
January, with an average low of 16°F (-9°C).
How much does it rain in Dewey?
About 9.8 inches (250 mm) a year; the wettest month is October.
Does it snow in Dewey?
Yes, about 15 inches of snow fall in an average year.
When is the best time to visit Dewey?
April–May and September–October, when temperatures are most pleasant and rainy days are fewer.
What climate does Dewey have?
Cold semi-arid (Köppen BSk).
Last updated: