May weather forecastJoliet, MT
May
Weather in May
May, the last month of the spring in Joliet, is an enjoyable month, with an average temperature varying between 41.4°F (5.2°C) and 61°F (16.1°C).Temperature
Entering May, Joliet sees a temperature rise, with the average high-temperature advancing from April's fresh 51.3°F (10.7°C) to a comfortable 61°F (16.1°C). An average low-temperature of 41.4°F (5.2°C) is common in Joliet during the nights of May.Humidity
In Joliet, Montana, the average relative humidity in May is 62%.Rainfall
May is the month with the most rainfall. Rain falls for 16.3 days and accumulates 2.09" (53mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Joliet, in May, snow falls for 2.4 days, with typically accumulated 2.83" (72mm) of snow. In Joliet, Montana, during the entire year, snow falls for 61.5 days and aggregates up to 41.77" (1061mm) of snow.Daylight
In May, the average length of the day is 14h and 56min.On the first day of the month, sunrise is at 6:02 am and sunset at 8:23 pm. On the last day of May, sunrise is at 5:30 am and sunset at 8:56 pm MDT.
Sunshine
In Joliet, the average sunshine in May is 10.5h.UV index
In Joliet, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 4 in May converts into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Joliet, MT
- Average high temperature in May: 61°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (30.7°F).
- Average low temperature in May: 41.4°F
The months with the highest average low temperature are July and August (57.2°F).
The coldest month (with the lowest average low temperature) is February (16.7°F).
Average pressure in May
Joliet, MT
- Average pressure in May: 29.93"Hg
The months with the highest atmospheric pressure are January and December (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in May
Joliet, MT
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in May
Joliet, MT
- Average humidity in May: 62%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (41%).
Average rainfall in May
Joliet, MT
- Average rainfall in May: 2.09"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in May
Joliet, MT
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4 days).
Average snowfall in May
Joliet, MT
- Average snowfall in May: 2.83"
The month with the highest snowfall is February (6.81").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Joliet, MT
- Average snowfall days in May: 2.4 days
The month with the highest number of snowfall days is February (10.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Joliet, MT
- Average daylight in May: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 10h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in May
Joliet, MT
- Average sunshine days in May: 10.5 days
The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is May (10.5 days).
Average UV index in May
Joliet, MT
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Joliet, MT
- Average cloud cover in May: 32
The month with the most cloud cover is February (Cloud cover 38).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in May
Joliet, 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).
