May weather forecastSumatra, MT
May
Weather in May
May, the last month of the spring in Sumatra, is a refreshing month, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 46.2°F (7.9°C).Temperature
As May sets, the average high-temperature shows an increase, moving up from a fresh 55.2°F (12.9°C) in April to a comfortable 65.8°F (18.8°C). The average nighttime temperature lowers to a frosty 46.2°F (7.9°C) throughout May.Humidity
The average relative humidity in May is 55%.Rainfall
The month with the most rainfall in Sumatra is May, when the rain falls for 13.7 days and typically aggregates up to 1.81" (46mm) of precipitation.Snowfall
Months with snowfall in Sumatra are January through May, September through December. May is the last month it regularly snows in Sumatra, Montana. During 0.4 snowfall days, in May, Sumatra aggregates 0.16" (4mm) of snow. In Sumatra, during the entire year, snow falls for 47 days and aggregates up to 15.83" (402mm) of snow.Daylight
In Sumatra, the average length of the day in May is 15h and 3min.On the first day of the month, sunrise is at 5:54 am and sunset at 8:20 pm. On the last day of May, sunrise is at 5:20 am and sunset at 8:55 pm MDT.
Sunshine
In May, the average sunshine is 10.1h.UV index
In Sumatra, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. To protect against the Sun's most potent rays, avoid direct exposure around midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Sumatra, MT
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The months with the lowest average high temperature are January and December (30.9°F).
- Average low temperature in May: 46.2°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in May
Sumatra, MT
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in May
Sumatra, MT
- Average wind speed in May: 10mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is July (8.2mph).
Average humidity in May
Sumatra, MT
- Average humidity in May: 55%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).
Average rainfall in May
Sumatra, MT
- Average rainfall in May: 1.81"
The wettest month (with the highest rainfall) is May (1.81").
The driest months (with the least rainfall) are January, November and December (0.47").
Average rainfall days in May
Sumatra, MT
- Average rainfall days in May: 13.7 days
The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in May
Sumatra, MT
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Sumatra, MT
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Sumatra, MT
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in May: 10h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 18min).
Average sunshine days in May
Sumatra, MT
- Average sunshine days in May: 15.1 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is April (14.2 days).
Average UV index in May
Sumatra, MT
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Sumatra, MT
- Average cloud cover in May: 34
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in May
Sumatra, MT
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
