May weather forecastHarlem, MT
May
Weather in May
May, the last month of the spring in Harlem, is a refreshing month, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 64°F (17.8°C).Temperature
The arrival of May brings an increase in high-temperatures, moving from a cool 52.5°F (11.4°C) in April to a comfortable 64°F (17.8°C). An average low-temperature of 45°F (7.2°C) marks the nights throughout May.Humidity
In Harlem, Montana, the average relative humidity in May is 55%.Rainfall
In Harlem, in May, during 13.2 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Harlem, during the entire year, the rain falls for 99.1 days and collects up to 10.12" (257mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 0.6 snowfall days, in May, Harlem aggregates 0.35" (9mm) of snow. Throughout the year, there are 57.6 snowfall days, and 21.69" (551mm) of snow is accumulated.Daylight
In Harlem, the average length of the day in May is 15h and 16min.On the first day of the month, sunrise is at 5:53 am and sunset at 8:30 pm. On the last day of May, sunrise is at 5:17 am and sunset at 9:08 pm MDT.
Sunshine
The average sunshine in May is 10.4h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A typical high UV index of 4 in May suggests the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Harlem, MT
- Average high temperature in May: 64°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is February (26.2°F).
- Average low temperature in May: 45°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is February (12.6°F).
Average pressure in May
Harlem, MT
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in May
Harlem, MT
- Average wind speed in May: 9.8mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in May
Harlem, MT
- Average humidity in May: 55%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (42%).
Average rainfall in May
Harlem, MT
- Average rainfall in May: 1.42"
The wettest month (with the highest rainfall) is June (1.85").
The driest months (with the least rainfall) are February, March and December (0.55").
Average rainfall days in May
Harlem, MT
- Average rainfall days in May: 13.2 days
The month with the highest number of rainy days is May (13.2 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in May
Harlem, MT
- Average snowfall in May: 0.35"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Harlem, MT
- Average snowfall days in May: 0.6 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Harlem, MT
- Average daylight in May: 15h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 10h and 24min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in May
Harlem, MT
- Average sunshine days in May: 14.5 days
The month with the most sunshine days is July (21.6 days).
The month with the least sunshine days is April (12.5 days).
Average UV index in May
Harlem, MT
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in May
Harlem, MT
- Average cloud cover in May: 31
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in May
Harlem, 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).
