Roundup, MT weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Roundup now
Loading the National Weather Service forecast…
Roundup weather by the hour
Roundup weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Roundup.
This week in Roundup
Sunrise, sunset and moon in Roundup
What is the weather usually like in Roundup?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 89°F average high
- Januarycoldest month · 13°F average low
- 14.9 inprecipitation per year · 378 mm
- 24.4 insnowfall per year · 62 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Roundup: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station ROUNDUP, MT US (USC00247214), adjusted for the elevation of Roundup.
Roundup weather month by month
Sunrise and sunset in Roundup through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:51 AM | 4:55 PM | 9 h 4 min |
| February | 7:15 AM | 5:41 PM | 10 h 25 min |
| March | 7:24 AM | 7:21 PM | 11 h 56 min |
| April | 6:24 AM | 8:03 PM | 13 h 38 min |
| May | 5:38 AM | 8:42 PM | 15 h 4 min |
| June | 5:18 AM | 9:10 PM | 15 h 51 min |
| July | 5:35 AM | 9:05 PM | 15 h 30 min |
| August | 6:11 AM | 8:25 PM | 14 h 13 min |
| September | 6:51 AM | 7:27 PM | 12 h 36 min |
| October | 7:30 AM | 6:29 PM | 10 h 58 min |
| November | 7:14 AM | 4:42 PM | 9 h 28 min |
| December | 7:49 AM | 4:29 PM | 8 h 40 min |
Times for the 15th of each month, local time (America/Denver).
What is the weather like in Roundup?
Roundup has a cold semi-arid climate. The warmest month is July, with an average high of 89°F (32°C), and the coldest is January, with average lows of 13°F (-11°C).
It gets about 14.9 inches (378 mm) of precipitation a year. The wettest month is June and the driest is January. Snow is common: about 24 inches fall in an average year.
The best time to visit Roundup is May–June and August–September. At 3,215 ft of elevation, nights are mild most of the year. 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.
More about Roundup
Weather in towns near Roundup
Questions about the weather in Roundup
What is the hottest month in Roundup?
July, with an average high of 89°F (32°C).
What is the coldest month in Roundup?
January, with an average low of 13°F (-11°C).
How much does it rain in Roundup?
About 14.9 inches (378 mm) a year; the wettest month is June.
Does it snow in Roundup?
Yes, about 24 inches of snow fall in an average year.
When is the best time to visit Roundup?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Roundup have?
Cold semi-arid (Köppen BSk).
What is the weather like in Roundup in November?
Highs average 47°F and lows 22°F, with about 0.5 inches of precipitation.
What time is sunrise in Roundup?
Around 7:14 AM in mid-November, and sunset around 4:42 PM. Today’s exact times are shown above.
Where does this Roundup weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Roundup.
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