Live Weather & Forecast
Weather in Roundup
Montana, United States · Real-time conditions & 3-day outlook
13°C
Feels like 11°C
56°F / Feels 52°F
Overcast
Roundup, Montana
🌞 Daytime
Updated: 2026-04-13 15:15
Humidity
31%
Wind
24.8 km/h W
Wind Gust
28.6 km/h
Pressure
1008 mb
Visibility
16 km
UV Index
2.5
(Low)
Precipitation
0 mm
Cloud Cover
100%
Dew Point
3.8°C
Wind Degree
269°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
148.9 μg/m³
NO₂
2.1 μg/m³
O₃
82 μg/m³
SO₂
0.9 μg/m³
PM 2.5
1.5 μg/m³
PM 10
1.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for Roundup, Montana
12 AM
8°
Clear
1 AM
7°
Clear
2 AM
6°
Clear
3 AM
6°
Clear
4 AM
5°
Clear
5 AM
4°
Clear
6 AM
4°
Clear
7 AM
5°
Sunny
8 AM
7°
Sunny
9 AM
9°
Sunny
10 AM
12°
Sunny
11 AM
14°
Sunny
12 PM
15°
Sunny
1 PM
16°
Partly Cloudy
2 PM
15°
Partly Cloudy
3 PM
13°
Overcast
4 PM
15°
Sunny
5 PM
16°
Sunny
6 PM
15°
Sunny
7 PM
13°
Sunny
8 PM
11°
Clear
9 PM
11°
Clear
10 PM
10°
Clear
11 PM
8°
Clear
3-Day Forecast
Daily overview for Roundup, Montana
Today
Sunny
17°
/
3°
🌧️ 0% chance of rain
💧 Avg. humidity: 58%
💨 Max wind: 32.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:30 AM
🌇 Sunset: 08:00 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
17°
/
2°
🌧️ 0% chance of rain
💧 Avg. humidity: 56%
💨 Max wind: 29.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:29 AM
🌇 Sunset: 08:01 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Overcast
18°
/
5°
🌧️ 0% chance of rain
💧 Avg. humidity: 50%
💨 Max wind: 29.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1
🌅 Sunrise: 06:27 AM
🌇 Sunset: 08:02 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Roundup
Plan your trip to Roundup, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Roundup?
Current conditions in Roundup: Overcast, temperature 13°C, humidity 31%.
What is the best time to visit Roundup?
The best time to visit Roundup is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Roundup?
Roundup is located at approximately 46.4° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Roundup?
The wettest period in Roundup is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Roundup?
For visits to Roundup during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Roundup in?
Roundup is located in United States, in the state of Montana.
What are the public holidays in Roundup in 2026?
View the 2026 public holidays for Roundup on our Holidays page.
What are the GPS coordinates used for the weather forecast in Roundup?
The weather forecast for Roundup uses coordinates 46.4452, -108.5418.