Cascade County (Great Falls)
May
Weather in Cascade County, Montana for May 2026
Your guide to Cascade County weather in May - trends and predictions
An exceptional deviation from the historical average is forecasted for first days of May 2026 in Cascade County with the forecasted temperature being 12.5 °F, much lower than usual.
In general, the average temperature in Cascade County at the beginning of May is 17.6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 26.7 °F by the end of May.
The climate of Cascade County in May is notably wet, with an average of 13 rainy days, and a total of 70.2 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
13
Rainy days
0
Snow days
20°/6°
Temperatures
21 km/h
Avg max wind
60 %
Avg humidity
Cascade County Weather May
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Temperatures trend during May in Cascade County
See the weather trend as well as the moving average line
May weather in Cascade County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 13° /0° | 0 mm | 3 | |
| May 2 | Sunny | 18° /2° | 0 mm | 3 | |
| May 3 | Sunny | 26° /5° | 0 mm | 7 | |
| May 4 |  Overcast | 16° /6° | 4.3 mm | 6 | |
| May 5 |  Heavy rain at times | 11° /4° | 17.7 mm | 4 | |
| May 6 |  Partly cloudy | 14° /0° | 0 mm | 8 | |
| May 7 | Overcast | 25° /5° | 0 mm | 8 | |
| May 8 |  Cloudy | 23° /8° | 0 mm | 8 | |
| May 9 | Sunny | 25° /5° | 0 mm | 8 | |
| May 10 |  Moderate rain at times | 29° /9° | 0.6 mm | 5 | |
| May 11 |  Patchy rain possible | 23° /10° | 0.6 mm | 5 | |
| May 12 | Patchy rain possible | 20° /10° | 0.2 mm | 8 | |
| May 13 | Patchy rain possible | 14° /8° | 0.9 mm | 3 | |
| May 14 | Moderate or heavy rain shower | 13° /6° | 9.4 mm | 3 | |
| May 15 | Moderate or heavy rain shower | 12° /6° | 4.9 mm | 2 | |
| May 16 | Patchy rain possible | 15° /5° | 0.3 mm | 3 | |
| May 17 | Partly cloudy | 18° /5° | 0 mm | 9 | |
| May 18 | Heavy rain at times | 12° /5° | 11.1 mm | 1 | |
| May 19 | Overcast | 15° /6° | 0.6 mm | 4 | |
| May 20 | Moderate rain at times | 15° /4° | 1.2 mm | 8 | |
| May 21 | Patchy rain possible | 15° /3° | 0.1 mm | 8 | |
| May 22 | Overcast | 16° /4° | 8.4 mm | 3 | |
| May 23 | Patchy rain possible | 15° /7° | 9.8 mm | 4 | |
| May 24 | Cloudy | 20° /4° | 0 mm | 9 | |
| May 25 | Sunny | 25° /4° | 0 mm | 9 | |
| May 26 |  Mist | 26° /5° | 0 mm | 9 | |
| May 27 | Cloudy | 25° /11° | 0 mm | 9 | |
| May 28 | Partly cloudy | 25° /9° | 0 mm | 9 | |
| May 29 | Mist | 29° /6° | 0 mm | 9 | |
| May 30 | Cloudy | 25° /13° | 0 mm | 9 | |
| May 31 | Sunny | 32° /7° | 0 mm | 9 | |
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Important Notice
Our weather forecast for Cascade 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 Cascade County forecast closer to your planned date for the most up-to-date weather information.
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Cascade County in May - FAQ
What are the expected maximum and minimum temperatures in Cascade County during May?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 6°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cascade County during May?
Moderate rainfall is anticipated in Cascade County during May, with a total of 70.2 mm spread over approximately 13 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Cascade County during May?
The average wind speed in Cascade County during May is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Cascade County
Explore the daily rainfall trends and prepare for Cascade Countys May weather 💧
Typically, Cascade County has 13 rainy days in May with a total of 70.2 mm of rainfall.
UV exposure in Cascade County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Cascade County?Get accurate weather forecasts for Cascade County, located at latitude 47.5 and longitude -111.301. Stay updated with localized weather information tailored for Cascade County.
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