Helena weather in May 2020

  • 18°C maximum daytime temperature in May in Helena18
    18°C max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in Helena11
    11 days with some rainfall
  • 3°C minimum night-time temperature in May in Helena3
    3°C min night temperature
  • 15 hours of daylight per day in May in Helena15
    15 hours of daylight per day
  • No heat & humidity in May in Helena0
    No heat & humidity
  • 51 mm monthly rainfall in May in Helena51
    51 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Helena7
    7 (High) UV index
  • Top deals & discounts
  • Helena weather overview
  • Helena climate averages by month
  • More destinations
  • Best time to go to Helena
  • Helena 5-day weather forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The May weather guide for Helena, Montana shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

  • Find low prices on flights to Montana
  • Discover the cheapest price, airlines & flight times
  • Search for the best deals before you book

How hot is it in Helena in May?

Daytime temperatures usually reach 18°C in Helena in May, falling to 3°C at night.

How sunny is it in Helena in May?

There are normally 9 hours of bright sunshine each day in Helena in May - that's 60% of daylight hours.

Does it rain in Helena in May?

There are usually 11 days with some rain in Helena in May and the average monthly rainfall is 51mm.

Helena sunrise & sunset times for May 2020

Browse the sunrise & sunset times for Helena in May 2020. Select a month to view Helena sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2020 06:13 20:39
Saturday, 16th May 2020 05:52 20:58
Sunday, 31st May 2020 05:39 21:14
  • Book car hire in the USA for 7 days & pay for just 5
  • Offer available to UK residents only
  • No hidden charges or credit card fees apply

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Discover more about the USA

Where's hot in Montana in May?

Below are average maximum temperatures at popular destinations in Montana in May. Select a destination to see more weather parameters.

More destinations & map >>

Related posts

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.