Helena (MT)
May
Weather in Helena, Montana for May 2027
Your guide to Helena weather in May - trends and predictions
Helena experiences moderate rainfall in May, with an average of 10 rainy days and a total precipitation of 69.6 mm.
Is May a good time to visit Helena? check out the best time to travel to Helena page.
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21
Dry days
10
Rainy days
0
Snow days
19°/5°
Temperatures
17 km/h
Avg max wind
55 %
Avg humidity
Helena Weather May
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Temperatures trend during May in Helena
See the weather trend as well as the moving average line
May weather in Helena day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 19° /1° | 0 mm | 6 | |
| May 2 | Sunny | 21° /3° | 0 mm | 7 | |
| May 3 | Sunny | 22° /4° | 0 mm | 7 | |
| May 4 |  Light rain | 14° /4° | 4.9 mm | 5 | |
| May 5 |  Moderate or heavy rain shower | 9° /1° | 6.7 mm | 5 | |
| May 6 |  Overcast | 17° /-2° | 0.2 mm | 6 | |
| May 7 |  Cloudy | 19° /4° | 0.6 mm | 6 | |
| May 8 | Sunny | 21° /5° | 0 mm | 7 | |
| May 9 |  Partly cloudy | 21° /6° | 0 mm | 7 | |
| May 10 |  Patchy rain possible | 26° /7° | 0.8 mm | 7 | |
| May 11 | Overcast | 23° /9° | 0 mm | 7 | |
| May 12 | Patchy rain possible | 22° /7° | 0.9 mm | 6 | |
| May 13 | Light rain | 20° /8° | 3.9 mm | 5 | |
| May 14 | Moderate or heavy rain shower | 14° /7° | 8.6 mm | 6 | |
| May 15 | Moderate or heavy rain shower | 13° /5° | 5.7 mm | 6 | |
| May 16 | Patchy rain possible | 12° /3° | 1.5 mm | 3 | |
| May 17 | Overcast | 11° /2° | 0.9 mm | 3 | |
| May 18 | Light rain | 11° /2° | 2.5 mm | 6 | |
| May 19 | Partly cloudy | 16° /1° | 0.1 mm | 7 | |
| May 20 | Light rain | 15° /2° | 5.3 mm | 4 | |
| May 21 | Patchy rain possible | 14° /1° | 0.5 mm | 3 | |
| May 22 | Patchy rain possible | 17° /3° | 1.7 mm | 7 | |
| May 23 | Patchy rain possible | 20° /4° | 2 mm | 7 | |
| May 24 | Sunny | 22° /6° | 0 mm | 6 | |
| May 25 | Sunny | 25° /6° | 0 mm | 8 | |
| May 26 | Sunny | 26° /7° | 0.8 mm | 8 | |
| May 27 |  Thundery outbreaks possible | 24° /10° | 0.3 mm | 6 | |
| May 28 | Sunny | 26° /9° | 0.1 mm | 8 | |
| May 29 | Light rain | 27° /9° | 7.5 mm | 8 | |
| May 30 |  Moderate rain | 19° /10° | 11.6 mm | 7 | |
| May 31 | Light rain | 22° /7° | 2.9 mm | 7 | |
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Important Notice
Our weather forecast for Helena 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 Helena forecast closer to your planned date for the most up-to-date weather information.
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Helena in May - FAQ
What are the expected maximum and minimum temperatures in Helena during May?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 5°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Helena during May?
Moderate rainfall is anticipated in Helena during May, with a total of 69.6 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Helena during May?
The average wind speed in Helena during May is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Helena
Explore the daily rainfall trends and prepare for Helenas May weather 💧
Typically, Helena has 10 rainy days in May with a total of 69.6 mm of rainfall.
UV exposure in Helena during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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