Boulder, ID
Unincorporated community in Blaine County, Idaho
Boulder is a small unincorporated community in Blaine County, Idaho. It is 12.6 miles SE of Ketchum, the nearest town. Its ZIP code is 83340.
Boulder at a glance
- State
- Idaho
- County
- Blaine County
- ZIP code
- 83340
- Nearest town
- Ketchum (12.6 mi)
- Time zone
- America/Boise
- Coordinates
- 43.8406, -114.5056
Weather in Boulder now
Loading the National Weather Service forecast…
Boulder weather by the hour
Boulder weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Boulder.
This week in Boulder
Sunrise, sunset and moon in Boulder
What is the weather usually like in Boulder?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 80°F average high
- Januarycoldest month · 8°F average low
- 17.3 inprecipitation per year · 441 mm
- 102.0 insnowfall per year · 259 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Boulder: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station KETCHUM RS, ID US (USC00104845), adjusted for the elevation of Boulder.
Boulder weather month by month
Sunrise and sunset in Boulder through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 8:07 AM | 5:28 PM | 9 h 20 min |
| February | 7:34 AM | 6:09 PM | 10 h 34 min |
| March | 7:47 AM | 7:45 PM | 11 h 57 min |
| April | 6:52 AM | 8:23 PM | 13 h 30 min |
| May | 6:10 AM | 8:58 PM | 14 h 48 min |
| June | 5:53 AM | 9:23 PM | 15 h 30 min |
| July | 6:08 AM | 9:19 PM | 15 h 11 min |
| August | 6:41 AM | 8:43 PM | 14 h 2 min |
| September | 7:16 AM | 7:49 PM | 12 h 33 min |
| October | 7:51 AM | 6:55 PM | 11 h 4 min |
| November | 7:31 AM | 5:13 PM | 9 h 42 min |
| December | 8:03 AM | 5:02 PM | 8 h 59 min |
Times for the 15th of each month, local time (America/Boise).
What is the weather like in Boulder?
Boulder has a warm-summer mediterranean continental climate. The warmest month is July, with an average high of 80°F (27°C), and the coldest is January, with average lows of 8°F (-13°C).
It gets about 17.3 inches (441 mm) of precipitation a year. The wettest month is December and the driest is August. Snow is common: about 102 inches fall in an average year.
The best time to visit Boulder is June to September. 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 Boulder
The closest live webcam is Blaine County › South: Galena Lodge, 7.7 miles W of Boulder.
Webcams: Windy.com. Distances in a straight line from Boulder.
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Map of Boulder, ID
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Boulder Street View
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Other communities near Boulder
Questions about Boulder
Where is Boulder, ID?
Boulder is an unincorporated community in Blaine County, Idaho, 12.6 miles SE of Ketchum.
What county is Boulder in?
Boulder is in Blaine County, Idaho.
What is the ZIP code of Boulder, ID?
The ZIP code for Boulder is 83340.
What is the nearest town to Boulder?
Ketchum, 12.6 miles away.
Are there webcams near Boulder?
Yes. The closest is Blaine County › South: Galena Lodge, 7.7 miles away.
What is the hottest month in Boulder?
July, with an average high of 80°F (27°C).
What is the coldest month in Boulder?
January, with an average low of 8°F (-13°C).
How much does it rain in Boulder?
About 17.3 inches (441 mm) a year; the wettest month is December.
Does it snow in Boulder?
Yes, about 102 inches of snow fall in an average year.
When is the best time to visit Boulder?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Boulder have?
Warm-summer mediterranean continental (Köppen Dsb).
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