Helena (MT)
May
Weather in Helena, Montana for May 2027
Your guide to Helena weather in May - trends and predictions
In general, the average temperature in Helena at the beginning of May is 17.3 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 24.1 °C by the end of May.
Helena experiences moderate rainfall in May, with an average of 10 rainy days and a total precipitation of 46.5 mm.
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Temperatures
Rain 🌧️
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21
Dry days
10
Rainy days
0
Snow days
19°/4°
Temperatures
17 km/h
Avg max wind
54 %
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° /2° | 0 mm | 7 | |
| May 3 | Sunny | 22° /4° | 0 mm | 7 | |
| May 4 |  Overcast | 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° /3° | 0.6 mm | 6 | |
| May 8 | Sunny | 21° /5° | 0 mm | 7 | |
| May 9 |  Partly cloudy | 21° /5° | 0 mm | 7 | |
| May 10 | Moderate rain at times | 26° /6° | 0.8 mm | 7 | |
| May 11 | Overcast | 23° /9° | 0 mm | 7 | |
| May 12 |  Patchy rain possible | 22° /6° | 0.9 mm | 6 | |
| May 13 | Moderate rain at times | 20° /8° | 3.9 mm | 5 | |
| May 14 | Moderate or heavy rain shower | 14° /6° | 8.6 mm | 6 | |
| May 15 | Moderate or heavy rain shower | 13° /5° | 5.7 mm | 6 | |
| May 16 | Overcast | 12° /3° | 1.5 mm | 3 | |
| May 17 | Overcast | 11° /1° | 0.9 mm | 3 | |
| May 18 | Patchy rain possible | 11° /2° | 2.5 mm | 6 | |
| May 19 | Partly cloudy | 16° /0° | 0.1 mm | 7 | |
| May 20 | Patchy rain possible | 15° /2° | 5.3 mm | 4 | |
| May 21 | Patchy rain possible | 14° /1° | 0.5 mm | 3 | |
| May 22 | Patchy rain possible | 17° /2° | 1.7 mm | 7 | |
| May 23 | Patchy rain possible | 20° /3° | 2 mm | 7 | |
| May 24 | Sunny | 22° /5° | 0 mm | 6 | |
| May 25 | Sunny | 25° /5° | 0 mm | 8 | |
| May 26 | Sunny | 26° /6° | 0.8 mm | 8 | |
| May 27 |  Thundery outbreaks possible | 24° /9° | 0.3 mm | 6 | |
| May 28 | Sunny | 26° /8° | 0.1 mm | 8 | |
| May 29 | Sunny | 27° /9° | 7.5 mm | 8 | |
| May 30 | Sunny | 19° /9° | 11.6 mm | 7 | |
| May 31 | Sunny | 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?
During May, expect a variety of temperatures with highs around 19° and lows near 4°, suitable for diverse activities and preferences.
How much rainfall should be expected in Helena during May?
In May, Helena can expect light to moderate rainfall, totaling 46.5 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.
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 46.5 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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