Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The start of May brings a rise in the average high-temperature, moving from a chilly 48.7°F (9.3°C) in April to a mild 60.4°F (15.8°C). Big Arm endures a clear shift from daytime heat to a mean low-temperature of 36.9°F (2.7°C) during May nights.Humidity
In May, the average relative humidity is 67%.Rainfall
In Big Arm, during May, the rain falls for 15.4 days and regularly aggregates up to 1.69" (43mm) of precipitation. In Big Arm, during the entire year, the rain falls for 160.2 days and collects up to 18.11" (460mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows in Big Arm. During 0.7 snowfall days, in May, Big Arm aggregates 0.2" (5mm) of snow. Throughout the year, there are 99 snowfall days, and 47.28" (1201mm) of snow is accumulated.Daylight
In Big Arm, the average length of the day in May is 15h and 11min.On the first day of May, sunrise is at 6:17 am and sunset at 8:50 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 9:27 pm MDT.
Sunshine
In Big Arm, the average sunshine in May is 10.5h.UV index
In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Prioritize safety - Recommendations to avert sunburn are shared. Direct Sun exposure should be minimized especially during midday when radiation is most intense. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Big Arm have in May?
What time are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Big Arm, MT
- Average high temperature in May: 60.4°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in May: 36.9°F
The months with the highest average low temperature are July and August (48.9°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in May
Big Arm, MT
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Big Arm, MT
- Average wind speed in May: 4.4mph
The windiest month (with the highest average wind speed) is April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in May
Big Arm, MT
- Average humidity in May: 67%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (51%).
Average rainfall in May
Big Arm, MT
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is June (2.2").
The driest months (with the least rainfall) are July and August (0.55").
Average rainfall days in May
Big Arm, MT
- Average rainfall days in May: 15.4 days
The months with the highest number of rainy days are March and April (18.8 days).
The month with the least rainy days is August (7 days).
Average snowfall in May
Big Arm, MT
- Average snowfall in May: 0.2"
The month with the highest snowfall is February (10.28").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Big Arm, MT
- Average snowfall days in May: 0.7 days
The month with the highest number of snowfall days is December (19.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Big Arm, MT
- Average daylight in May: 15h and 1min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in May: 10h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in May
Big Arm, MT
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is July (21.3 days).
The month with the least sunshine days is March (6.4 days).
Average UV index in May
Big Arm, MT
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Big Arm, MT
- Average cloud cover in May: 32
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility in May
Big Arm, MT
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Big Arm, Montana, USA
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