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Weather in Montana for May 2027

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.

    • Temperatures

  • In general, the average temperature in Montana at the beginning of May is 17.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.3 °C by the end of May.

    • Rain 🌧️

  • Montana in May brings notable rainfall, with an average of 16 rainy days and a total precipitation of 76.3 mm.

    • More

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

Average dry days
14
Dry days
Average rainy days
16
Rainy days
Average snowy days
1
Snow days
Average temperatures
18°/6°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
61 %
Avg humidity

Montana Weather May

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

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 °C / 6 °CPatchy rain possibleBozeman16 °C / 4 °CPatchy rain possibleBillings21 °C / 7 °CPatchy rain possibleMissoula19 °C / 6 °CPatchy rain possibleHelena19 °C / 5 °CPatchy rain possibleGreat Falls20 °C / 7 °CPatchy rain possibleButte16 °C / 2 °CPatchy rain possibleBig Sky10 °C / -1 °CMore 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 Partly cloudy
Partly cloudy
 19° /2° 0 mm 0 cm
May 2 Sunny
Sunny
 21° /3° 0 mm 0 cm
May 3 Sunny
Sunny
 23° /5° 0 mm 0 cm
May 4 Patchy rain possible
Patchy rain possible
 13° /6° 1.6 mm 0 cm
May 5 Patchy rain possible
Patchy rain possible
 14° /2° 0.4 mm 0 cm
May 6 Sunny
Sunny
 17° /0° 0.8 mm 0 cm
May 7 Partly cloudy
Partly cloudy
 18° /5° 0.8 mm 0 cm
May 8 Patchy rain possible
Patchy rain possible
 19° /7° 0.6 mm 0 cm
May 9 Cloudy
Cloudy
 20° /5° 0 mm 0 cm
May 10 Overcast
Overcast
 22° /7° 0 mm 0 cm
May 11 Patchy rain possible
Patchy rain possible
 19° /7° 3.4 mm 0 cm
May 12 Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /5° 5.6 mm 0 cm
May 13 Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /6° 5.2 mm 0 cm
May 14 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /5° 4.8 mm 0 cm
May 15 Moderate rain at times
Moderate rain at times
 12° /6° 3.2 mm 0 cm
May 16 Moderate rain at times
Moderate rain at times
 12° /2° 7.9 mm 0.2 cm
May 17 Cloudy
Cloudy
 14° /2° 2.5 mm 0 cm
May 18 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /2° 3.5 mm 0 cm
May 19 Overcast
Overcast
 13° /2° 4 mm 0 cm
May 20 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /3° 2.7 mm 0 cm
May 21 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /4° 7.1 mm 0 cm
May 22 Overcast
Overcast
 17° /5° 0.4 mm 0 cm
May 23 Patchy rain possible
Patchy rain possible
 19° /6° 2 mm 0 cm
May 24 Sunny
Sunny
 21° /6° 0 mm 0 cm
May 25 Sunny
Sunny
 25° /8° 0.2 mm 0 cm
May 26 Sunny
Sunny
 24° /10° 3.2 mm 0 cm
May 27 Partly cloudy
Partly cloudy
 22° /11° 0.1 mm 0 cm
May 28 Sunny
Sunny
 27° /10° 0.9 mm 0 cm
May 29 Thundery outbreaks possible
Thundery outbreaks possible
 26° /11° 3.8 mm 0 cm
May 30 Moderate rain at times
Moderate rain at times
 19° /8° 1 mm 0 cm
May 31 Sunny
Sunny
 20° /5° 10.8 mm 0 cm
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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.
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Montana in May - FAQ

What are the expected maximum and minimum temperatures in Montana during May?
Enjoy moderate daytime temperatures of up to 18° 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 76.3 mm spread over approximately 16 days. Considering plans for rainy days is advisable.

Will it snow in Montana in May 2027?
Montana typically sees 0.18 cm of snowfall during May.

What are the typical wind conditions in Montana during May?
The average wind speed in Montana during May is 12 km/h, suggesting breezy to windy conditions, depending on your activities.

Montana snow forecast May 2027

Track daily snowfall levels and discover Montana’s snowy potential this May ❄️
On average, Montana sees 1 snowy days during May, with approximately 0.2 cm of total snowfall.

May rainfall patterns in Montana

Explore the daily rainfall trends and prepare for Montanas May weather 💧
Typically, Montana has 16 rainy days in May with a total of 76.3 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
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Big SkyBillingsBozemanButteGlacier National ParkGreat FallsHelenaMissoula
More Locations

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Location coordinates Where is Montana?

Get accurate weather forecasts for Montana, located at latitude 48.683 and longitude -113.8. Stay updated with localized weather information tailored for Montana.

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