For Business
|
Warnings
Data Suite
Forensics
Advertising
Superior Accuracy™

Northeast weather to feel more like Thanksgiving than Memorial Day. See the temp forecast.

Roundup, MT

Location

Location News Videos

Use Current Location

Recent

Roundup

Montana

No results found.

Try searching for a city, zip code or point of interest.

Create Your Account Unlock extended daily and hourly forecasts — all with your free account.

Have an account already? Log In

settings

Roundup, MT Weather

Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center

Hourly

10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

View hourly forecasts 10-days ahead

Activate Your Premium+ Subscription

4 PM

77°

RealFeel® 80°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Intermittent clouds

RealFeel Shade™74°

WindW 9 mph

Air QualityFair

Max UV Index4.7 (Moderate)

Wind Gusts15 mph

Humidity17%

Indoor Humidity17% (Dry)

Dew Point29° F

AccuLumen Brightness Index™7 (Bright)

Cloud Cover55%

Visibility10 mi

Cloud Ceiling34000 ft

5 PM

76°

RealFeel® 77°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Intermittent clouds

RealFeel Shade™73°

WindNW 8 mph

Air QualityFair

Max UV Index2.8 (Moderate)

Wind Gusts14 mph

Humidity19%

Indoor Humidity19% (Slightly Dry)

Dew Point30° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover71%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

75°

RealFeel® 75°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Intermittent clouds

RealFeel Shade™72°

WindN 7 mph

Air QualityFair

Max UV Index2.0 (Low)

Wind Gusts13 mph

Humidity22%

Indoor Humidity22% (Slightly Dry)

Dew Point33° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover66%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

73°

RealFeel® 73°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Intermittent clouds

RealFeel Shade™71°

WindNNE 7 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts8 mph

Humidity25%

Indoor Humidity25% (Slightly Dry)

Dew Point35° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover61%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

71°

RealFeel® 70°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Intermittent clouds

RealFeel Shade™70°

WindSW 7 mph

Air QualityFair

Max UV Index0.4 (Low)

Wind Gusts8 mph

Humidity27%

Indoor Humidity27% (Slightly Dry)

Dew Point36° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover55%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

67°

RealFeel® 65°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Partly cloudy

WindSE 7 mph

Air QualityFair

Wind Gusts8 mph

Humidity32%

Indoor Humidity32% (Slightly Dry)

Dew Point37° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover47%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

63°

RealFeel® 61°

Cool

RealFeel Guide

Cool

53° to 62°

Light jacket or sweater may be appropriate.

0%

Partly cloudy

WindSE 7 mph

Air QualityFair

Wind Gusts8 mph

Humidity38%

Indoor Humidity32% (Slightly Dry)

Dew Point37° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover36%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

60°

RealFeel® 57°

Cool

RealFeel Guide

Cool

53° to 62°

Light jacket or sweater may be appropriate.

0%

Mostly clear

WindS 7 mph

Air QualityFair

Wind Gusts7 mph

Humidity44%

Indoor Humidity33% (Slightly Dry)

Dew Point38° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover24%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for Roundup

AccuWeather's hourly forecast for Roundup provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 77° with a RealFeel® of 80°, intermittent clouds with a 0% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

Further Ahead

Tomorrow

Monday

10-Day

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Severe Weather

Drenching, gusty storms will put damper on plans in Southeast, Plains

1 hour ago

Weather News

Southern California fires threaten homes and former nuclear site

1 day ago

Weather Forecasts

It will feel more like Thanksgiving than Memorial Day in the Northeast

2 hours ago

Hurricane

Hurricane season hasn't started, but one area is already being watched

2 hours ago

Weather News

State of Emergency declared for Utah drought after 'no-pack' winter

1 day ago

Featured Stories

Astronomy

SpaceX unleashes upgraded Starship rocket in 12th test flight

19 hours ago

Health

Melanoma survivor shares warning for Don’t Fry Day: ‘I changed everyth...

1 day ago

Travel

Waymo recalls robotaxi fleet after one drove into Texas floodwaters

2 days ago

Recreation

It’s nearly Memorial Day, but this national park just had a snowstorm

3 days ago

Astronomy

Neptune’s moon Nereid may be survivor from ancient cosmic shake-up

2 days ago

World North America United States Montana Roundup

Weather Near Roundup:

Billings, MT
Cody, WY
Miles City, MT

Company

Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us

Products & Services

For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations

Apps & Downloads

iPhone App Android App See all Apps & Downloads

Subscription Services

AccuWeather Premium AccuWeather Professional

More

AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center

Company

Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us

Products & Services

For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations

Apps & Downloads

iPhone App Android App See all Apps & Downloads

Subscription Services

AccuWeather Premium AccuWeather Professional

More

AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center

© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.

Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...