easeweather.com
Montana (Billings)
Billings (MT)Bozeman (MT)Butte (MT)Glacier National Park (MT)Great Falls (MT)Helena (MT)Missoula (MT) More Locations
United States weather

Weather in Montana for May 2026

Your guide to Montana weather in May - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Montana during May is quite rare, with fewer than 2 snowy days on average.
    According to Montana snow forecast for May 2026, 5 snowy days are expected at the beginning of May. The first snowfall for May is expected in Thursday, May 7.

    • Temperatures

  • The forecast for the first days of May 2026 in Montana predicts temperatures to be around 15 °F, close to the historical average.

  • In general, the average temperature in Montana at the beginning of May is 21 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25 °F by the end of May.

    • Rain 🌧️

  • The climate of Montana in May is notably wet, with an average of 12 rainy days, and a total of 93.5 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
19
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/6°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
65 %
Avg humidity

Montana Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
23°
2
Sunny
20°
3
Partly cloudy
22°
4
Sunny
23°
5
Sunny
27°
6
Patchy rain possible
26°
7
Moderate rain
6°
8
Patchy rain possible
3°
9
Patchy rain possible
2°
10
Heavy snow
1°
11
Partly cloudy
6°
12
Patchy rain possible
17°
13
Patchy rain possible
18°
14
Moderate or heavy rain shower
13°
15
Moderate or heavy rain shower
14°
16
Patchy rain possible
16°
17
Patchy rain possible
20°
18
Moderate or heavy rain shower
16°
19
Heavy rain at times
12°
20
Moderate rain at times
17°
21
Moderate rain at times
18°
22
Overcast
22°
23
Patchy rain possible
20°
24
Moderate or heavy rain shower
17°
25
Mist
21°
26
Overcast
23°
27
Mist
25°
28
Sunny
24°
29
Mist
26°
30
Sunny
26°
31
Sunny
30°

What’s the Weather Like in Montana This May?

Discover the average temperatures and weather trends across Montana’s cities this May.
Patchy rain possibleGlacier National Park18 °F / 6 °FPatchy rain possibleBillings21 °F / 6 °FPatchy rain possibleBozeman16 °F / 4 °FPatchy rain possibleMissoula19 °F / 7 °FSunnyHelena18 °F / 4 °FPatchy rain possibleGreat Falls20 °F / 6 °FPatchy rain possibleButte16 °F / 2 °FMore Locations

Temperatures trend during May in Montana

See the weather trend as well as the moving average line

May weather in Montana day by day

Click on a date for more information
April June
Date Weather Temperatures Rain Snow More
May 1 Sunny
Sunny
 23° /5° 0 mm 0 cm
May 2 Sunny
Sunny
 20° /7° 0 mm 0 cm
May 3 Partly cloudy
Partly cloudy
 22° /8° 0.1 mm 0 cm
May 4 Sunny
Sunny
 23° /9° 0 mm 0 cm
May 5 Sunny
Sunny
 27° /10° 0 mm 0 cm
May 6 Patchy rain possible
Patchy rain possible
 26° /12° 0.1 mm 0 cm
May 7 Moderate rain
Moderate rain
 6° /2° 5.1 mm 2.8 cm
May 8 Patchy rain possible
Patchy rain possible
 3° /2° 4.8 mm 3.5 cm
May 9 Patchy rain possible
Patchy rain possible
 2° /1° 4.4 mm 3.2 cm
May 10 Heavy snow
Heavy snow
 1° /1° 8.4 mm 6.1 cm
May 11 Partly cloudy
Partly cloudy
 6° /-5° 0.1 mm 0 cm
May 12 Patchy rain possible
Patchy rain possible
 17° /1° 0.1 mm 0 cm
May 13 Patchy rain possible
Patchy rain possible
 18° /7° 12.8 mm 0 cm
May 14 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /7° 24.6 mm 0 cm
May 15 Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /6° 6.1 mm 0 cm
May 16 Patchy rain possible
Patchy rain possible
 16° /6° 0.2 mm 0 cm
May 17 Patchy rain possible
Patchy rain possible
 20° /5° 0.5 mm 0 cm
May 18 Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /8° 20.2 mm 0 cm
May 19 Heavy rain at times
Heavy rain at times
 12° /5° 10.4 mm 0 cm
May 20 Moderate rain at times
Moderate rain at times
 17° /5° 1.1 mm 0 cm
May 21 Moderate rain at times
Moderate rain at times
 18° /4° 1 mm 0 cm
May 22 Overcast
Overcast
 22° /3° 1.2 mm 0 cm
May 23 Patchy rain possible
Patchy rain possible
 20° /7° 0.1 mm 0 cm
May 24 Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /7° 2.5 mm 0 cm
May 25 Mist
Mist
 21° /3° 0 mm 0 cm
May 26 Overcast
Overcast
 23° /4° 0 mm 0 cm
May 27 Mist
Mist
 25° /6° 0 mm 0 cm
May 28 Sunny
Sunny
 24° /13° 0 mm 0 cm
May 29 Mist
Mist
 26° /7° 0 mm 0 cm
May 30 Sunny
Sunny
 26° /11° 0 mm 0 cm
May 31 Sunny
Sunny
 30° /10° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Montana in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Montana forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Montana in May - FAQ

What are the expected maximum and minimum temperatures in Montana during May?

Enjoy moderate daytime temperatures of up to 21° and cooler nights around 6°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Montana during May?

Moderate rainfall is anticipated in Montana during May, with a total of 93.5 mm spread over approximately 12 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Montana during May?

The average wind speed in Montana during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

Montana snow forecast May 2026

Track daily snowfall levels and discover Montana’s snowy potential this May ❄️

May rainfall patterns in Montana

Explore the daily rainfall trends and prepare for Montanas May weather 💧
Typically, Montana has 12 rainy days in May with a total of 93.5 mm of rainfall.

UV exposure in Montana during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Counties in Montana
Select a county for an accurate weather forecast
Cascade CountyFlathead CountyGallatin CountyLewis and Clark CountyMissoula CountySilver Bow CountyYellowstone County
Top locations in Montana
Select a location for an accurate weather forecast
BillingsBozemanButteGlacier National ParkGreat FallsHelenaMissoula
More Locations

Quick links

More Montana weather pages
You are here
Location coordinates Where is Montana?

Get accurate weather forecasts for Montana, located at latitude 45.783 and longitude -108.501. Stay updated with localized weather information tailored for Montana.

Found a mistake?
We appreciate your attention to details. Tell us here.