Summit Valley, MT
Unincorporated community in Madison County, Montana
Summit Valley is a small unincorporated community in Madison County, Montana. It is 6.9 miles SE of Harrison, the nearest town. Its ZIP code is 59721.
Summit Valley at a glance
- State
- Montana
- County
- Madison County
- ZIP code
- 59721
- Nearest town
- Harrison (6.9 mi)
- Time zone
- America/Denver
- Coordinates
- 45.7706, -111.8917
Weather in Summit Valley now
Loading the National Weather Service forecast…
Summit Valley weather by the hour
Summit Valley weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Summit Valley.
This week in Summit Valley
Sunrise, sunset and moon in Summit Valley
What is the weather usually like in Summit Valley?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 85°F average high
- Decembercoldest month · 24°F average low
- 18.4 inprecipitation per year · 466 mm
- 51.8 insnowfall per year · 132 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Summit Valley: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station NORRIS MADISON PWR HOUSE, MT US (USC00246157), adjusted for the elevation of Summit Valley.
Summit Valley weather month by month
Sunrise and sunset in Summit Valley through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 8:02 AM | 5:11 PM | 9 h 8 min |
| February | 7:27 AM | 5:55 PM | 10 h 28 min |
| March | 7:37 AM | 7:34 PM | 11 h 57 min |
| April | 6:39 AM | 8:15 PM | 13 h 36 min |
| May | 5:53 AM | 8:54 PM | 15 h 0 min |
| June | 5:35 AM | 9:21 PM | 15 h 45 min |
| July | 5:51 AM | 9:16 PM | 15 h 24 min |
| August | 6:26 AM | 8:37 PM | 14 h 10 min |
| September | 7:04 AM | 7:40 PM | 12 h 35 min |
| October | 7:43 AM | 6:43 PM | 11 h 0 min |
| November | 7:26 AM | 4:58 PM | 9 h 32 min |
| December | 8:00 AM | 4:45 PM | 8 h 45 min |
Times for the 15th of each month, local time (America/Denver).
What is the weather like in Summit Valley?
Summit Valley has a warm-summer humid continental climate. The warmest month is July, with an average high of 85°F (30°C), and the coldest is December, with average lows of 24°F (-5°C).
It gets about 18.4 inches (466 mm) of precipitation a year. The wettest month is June and the driest is January. Snow is common: about 52 inches fall in an average year.
The best time to visit Summit Valley 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 Summit Valley
The closest live webcam is Butte › South-east, 35.0 miles NW of Summit Valley.
Webcams: Windy.com. Distances in a straight line from Summit Valley.
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Map of Summit Valley, MT
Tap any road on the map to see it in Street View below. Map: © OpenStreetMap contributors.
Summit Valley Street View
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Open in Google Maps ›Towns near Summit Valley
Other communities near Summit Valley
Questions about Summit Valley
Where is Summit Valley, MT?
Summit Valley is an unincorporated community in Madison County, Montana, 6.9 miles SE of Harrison.
What county is Summit Valley in?
Summit Valley is in Madison County, Montana.
What is the ZIP code of Summit Valley, MT?
The ZIP code for Summit Valley is 59721.
What is the nearest town to Summit Valley?
Harrison, 6.9 miles away.
Are there webcams near Summit Valley?
Yes. The closest is Butte › South-east, 35.0 miles away.
What is the hottest month in Summit Valley?
July, with an average high of 85°F (30°C).
What is the coldest month in Summit Valley?
December, with an average low of 24°F (-5°C).
How much does it rain in Summit Valley?
About 18.4 inches (466 mm) a year; the wettest month is June.
Does it snow in Summit Valley?
Yes, about 52 inches of snow fall in an average year.
When is the best time to visit Summit Valley?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Summit Valley have?
Warm-summer humid continental (Köppen Dfb).
Last updated: