Montana weather in May 2020

  • 64°F maximum daytime temperature in May in Montana (Helena)64
    64°F max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in Montana (Helena)11
    11 days with some rainfall
  • 37°F minimum night-time temperature in May in Montana (Helena)37
    37°F min night temperature
  • 15 hours of daylight per day in May in Montana (Helena)15
    15 hours of daylight per day
  • No heat & humidity in May in Montana (Helena)0
    No heat & humidity
  • 2.0 inches monthly rainfall in May in Montana (Helena)2.0
    2.0 inches of monthly rainfall
  • UV (maximum) index 7 (High) in May in Montana (Helena)7
    7 (High) UV index

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Expect 64°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Montana in May. Check more long-term weather averages for Montana in May before you book your next holiday to Montana in 2020/2021. The May weather averages shown above are for Helena.

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The May weather guide for Montana, represented by Helena, 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)  |  Imperial (°F)

Guide to Montana weather in May

The average maximum daytime temperature in Montana 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.

The weather in Montana in May is represented by Helena.

Montana sunrise & sunset times for May 2020

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2020 06:13 20:39
Saturday, 2nd May 2020 06:11 20:40
Sunday, 3rd May 2020 06:10 20:41
Monday, 4th May 2020 06:08 20:43
Tuesday, 5th May 2020 06:07 20:44
Wednesday, 6th May 2020 06:05 20:45
Thursday, 7th May 2020 06:04 20:46
Friday, 8th May 2020 06:02 20:48
Saturday, 9th May 2020 06:01 20:49
Sunday, 10th May 2020 06:00 20:50
Monday, 11th May 2020 05:58 20:52
Tuesday, 12th May 2020 05:57 20:53
Wednesday, 13th May 2020 05:56 20:54
Thursday, 14th May 2020 05:55 20:55
Friday, 15th May 2020 05:53 20:56
Saturday, 16th May 2020 05:52 20:58
Sunday, 17th May 2020 05:51 20:59
Monday, 18th May 2020 05:50 21:00
Tuesday, 19th May 2020 05:49 21:01
Wednesday, 20th May 2020 05:48 21:02
Thursday, 21st May 2020 05:47 21:03
Friday, 22nd May 2020 05:46 21:05
Saturday, 23rd May 2020 05:45 21:06
Sunday, 24th May 2020 05:44 21:07
Monday, 25th May 2020 05:43 21:08
Tuesday, 26th May 2020 05:42 21:09
Wednesday, 27th May 2020 05:42 21:10
Thursday, 28th May 2020 05:41 21:11
Friday, 29th May 2020 05:40 21:12
Saturday, 30th May 2020 05:40 21:13
Sunday, 31st May 2020 05:39 21:14
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