Helena weather in May 2019

  • 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

Going to Helena? Find the best month to visit Helena based on the weather.

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Expect 18°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Helena in May. Check more long-term weather averages for Helena in May before you book your next holiday to Montana in 2019/2020.

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More about Helena

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.

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

Guide to Helena weather in May

The average maximum daytime temperature in Helena in May is a comfortable 18°C (64°F). The average night-time temperature is usually a cold 3°C (37°F). There are usually 9 hours of bright sunshine each day, which represents 60% of the 15 hours of daylight.

Expect 51mm (2.0 inches) of rainfall across the whole of May with 11 days with some rain falling. Maximum UV levels will be high (7 UV index) at midday when the skies are clear.

Helena sunrise & sunset times for May 2019

Browse the sunrise & sunset times for Helena in May 2019. Select a month to view Helena sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st May 2019 06:14 20:38
Thursday, 2nd May 2019 06:12 20:39
Friday, 3rd May 2019 06:11 20:40
Saturday, 4th May 2019 06:09 20:42
Sunday, 5th May 2019 06:08 20:43
Monday, 6th May 2019 06:06 20:44
Tuesday, 7th May 2019 06:05 20:45
Wednesday, 8th May 2019 06:03 20:47
Thursday, 9th May 2019 06:02 20:48
Friday, 10th May 2019 06:01 20:49
Saturday, 11th May 2019 05:59 20:51
Sunday, 12th May 2019 05:58 20:52
Monday, 13th May 2019 05:57 20:53
Tuesday, 14th May 2019 05:55 20:54
Wednesday, 15th May 2019 05:54 20:56
Thursday, 16th May 2019 05:53 20:57
Friday, 17th May 2019 05:52 20:58
Saturday, 18th May 2019 05:51 20:59
Sunday, 19th May 2019 05:50 21:00
Monday, 20th May 2019 05:49 21:01
Tuesday, 21st May 2019 05:48 21:03
Wednesday, 22nd May 2019 05:47 21:04
Thursday, 23rd May 2019 05:46 21:05
Friday, 24th May 2019 05:45 21:06
Saturday, 25th May 2019 05:44 21:07
Sunday, 26th May 2019 05:43 21:08
Monday, 27th May 2019 05:42 21:09
Tuesday, 28th May 2019 05:41 21:10
Wednesday, 29th May 2019 05:41 21:11
Thursday, 30th May 2019 05:40 21:12
Friday, 31st May 2019 05:39 21:13
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