Yellowstone County (Billings)
May
Weather in Yellowstone County, Montana for May 2026
Your guide to Yellowstone County weather in May - trends and predictions
In general, the average temperature in Yellowstone County at the beginning of May is 19.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25 °F by the end of May.
The climate of Yellowstone County in May is notably wet, with an average of 14 rainy days, and a total of 93.5 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
14
Rainy days
0
Snow days
21°/6°
Temperatures
20 km/h
Avg max wind
66 %
Avg humidity
Yellowstone County Weather May
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Temperatures trend during May in Yellowstone County
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May weather in Yellowstone County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Moderate rain at times | 18° /3° | 1.2 mm | 4 | |
| May 2 |  Partly cloudy | 22° /1° | 0 mm | 6 | |
| May 3 |  Sunny | 26° /7° | 0 mm | 7 | |
| May 4 | Partly cloudy | 27° /6° | 0 mm | 7 | |
| May 5 |  Heavy rain at times | 12° /4° | 9.6 mm | 3 | |
| May 6 |  Patchy rain possible | 9° /4° | 1.7 mm | 2 | |
| May 7 |  Overcast | 22° /3° | 0 mm | 5 | |
| May 8 | Sunny | 26° /7° | 0 mm | 7 | |
| May 9 | Overcast | 26° /9° | 0 mm | 6 | |
| May 10 | Partly cloudy | 30° /7° | 0 mm | 8 | |
| May 11 | Overcast | 28° /14° | 0 mm | 6 | |
| May 12 | Patchy rain possible | 29° /10° | 0.3 mm | 6 | |
| May 13 | Patchy rain possible | 18° /7° | 12.8 mm | 4 | |
| May 14 | Moderate or heavy rain shower | 13° /7° | 24.6 mm | 3 | |
| May 15 | Moderate or heavy rain shower | 14° /6° | 6.1 mm | 3 | |
| May 16 | Patchy rain possible | 16° /6° | 0.2 mm | 4 | |
| May 17 | Patchy rain possible | 20° /5° | 0.5 mm | 5 | |
| May 18 | Moderate or heavy rain shower | 16° /8° | 20.2 mm | 4 | |
| May 19 | Heavy rain at times | 12° /5° | 10.4 mm | 3 | |
| May 20 | Moderate rain at times | 17° /5° | 1.1 mm | 4 | |
| May 21 | Moderate rain at times | 18° /4° | 1 mm | 4 | |
| May 22 | Overcast | 22° /3° | 1.2 mm | 5 | |
| May 23 | Patchy rain possible | 20° /7° | 0.1 mm | 5 | |
| May 24 | Moderate or heavy rain shower | 17° /7° | 2.5 mm | 4 | |
| May 25 |  Mist | 21° /3° | 0 mm | 5 | |
| May 26 | Overcast | 23° /4° | 0 mm | 5 | |
| May 27 | Mist | 25° /6° | 0 mm | 6 | |
| May 28 | Sunny | 24° /13° | 0 mm | 6 | |
| May 29 | Mist | 26° /7° | 0 mm | 6 | |
| May 30 | Sunny | 26° /11° | 0 mm | 7 | |
| May 31 | Sunny | 30° /10° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Yellowstone County 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 Yellowstone County forecast closer to your planned date for the most up-to-date weather information.
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Yellowstone County in May - FAQ
What are the expected maximum and minimum temperatures in Yellowstone County 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 Yellowstone County during May?
Moderate rainfall is anticipated in Yellowstone County during May, with a total of 93.5 mm spread over approximately 14 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Yellowstone County during May?
The average wind speed in Yellowstone County during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Yellowstone County
Explore the daily rainfall trends and prepare for Yellowstone Countys May weather 💧
UV exposure in Yellowstone County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Yellowstone County?Get accurate weather forecasts for Yellowstone County, located at latitude 45.783 and longitude -108.501. Stay updated with localized weather information tailored for Yellowstone County.
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