Great Falls weather in May 2020

  • 18°C maximum daytime temperature in May in Great Falls18
    18°C max day temperature
  • 9 hours of sunshine per day
  • 12 days with some rainfall in May in Great Falls12
    12 days with some rainfall
  • 5°C minimum night-time temperature in May in Great Falls5
    5°C min night temperature
  • 15 hours of daylight per day in May in Great Falls15
    15 hours of daylight per day
  • No heat & humidity in May in Great Falls0
    No heat & humidity
  • 63 mm monthly rainfall in May in Great Falls63
    63 mm of monthly rainfall
  • UV (maximum) index 6 (High) in May in Great Falls6
    6 (High) UV index

Going to Great Falls? Find the best month to visit Great Falls 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 Great Falls in May. Check more long-term weather averages for Great Falls in May before you book your next holiday to Montana in 2020/2021.

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More about Great Falls

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The May weather guide for Great Falls, 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 Great Falls weather in May

The average maximum daytime temperature in Great Falls in May is a comfortable 18°C (64°F). The average night-time temperature is usually a cold 5°C (41°F). There are usually 9 hours of bright sunshine each day, which represents 61% of the 15 hours of daylight.

Expect 63mm (2.5 inches) of rainfall across the whole of May with 12 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear.

Great Falls sunrise & sunset times for May 2020

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2020 06:07 20:38
Saturday, 2nd May 2020 06:06 20:39
Sunday, 3rd May 2020 06:04 20:41
Monday, 4th May 2020 06:03 20:42
Tuesday, 5th May 2020 06:01 20:43
Wednesday, 6th May 2020 06:00 20:45
Thursday, 7th May 2020 05:58 20:46
Friday, 8th May 2020 05:57 20:48
Saturday, 9th May 2020 05:55 20:49
Sunday, 10th May 2020 05:54 20:50
Monday, 11th May 2020 05:53 20:51
Tuesday, 12th May 2020 05:51 20:53
Wednesday, 13th May 2020 05:50 20:54
Thursday, 14th May 2020 05:49 20:55
Friday, 15th May 2020 05:47 20:57
Saturday, 16th May 2020 05:46 20:58
Sunday, 17th May 2020 05:45 20:59
Monday, 18th May 2020 05:44 21:00
Tuesday, 19th May 2020 05:43 21:01
Wednesday, 20th May 2020 05:42 21:03
Thursday, 21st May 2020 05:41 21:04
Friday, 22nd May 2020 05:40 21:05
Saturday, 23rd May 2020 05:39 21:06
Sunday, 24th May 2020 05:38 21:07
Monday, 25th May 2020 05:37 21:08
Tuesday, 26th May 2020 05:36 21:09
Wednesday, 27th May 2020 05:35 21:10
Thursday, 28th May 2020 05:34 21:11
Friday, 29th May 2020 05:34 21:12
Saturday, 30th May 2020 05:33 21:13
Sunday, 31st May 2020 05:32 21:14
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