Helena Weather in May

Thinking of visiting Helena in May? Expect moderate temperatures reaching 17°C (63°F) during the day, dropping to 4°C (39°F) at night, and be prepared for the wettest month of the year.

Rainfall in Helena in May

Since this is the rainiest month of the year, it's a good idea to carry an umbrella just in case. Rain is expected on roughly 15 days, totalling around 59 mm (2.3 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Helena in May

Daytime temperatures in Helena reach 17°C (63°F) in May, dropping to 4°C (39°F) at night. The difference between afternoon and evening temperatures is usually noticeable. Nights fall to 4°C (39°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Helena in May

The month enjoys around 282 hours of sunshine, creating mostly sunny days with good weather conditions.

If you prefer dry days with pleasant temperatures, June, July, August and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.