May weather forecastDell, MT
May
Weather in May
May, the last month of the spring in Dell, is a mild month, with an average temperature varying between 34.7°F (1.5°C) and 55.6°F (13.1°C).Temperature
As Dell enters May, the average high-temperature increases from the a frosty 44.1°F (6.7°C) of April to a mild 55.6°F (13.1°C). An average low-temperature of 34.7°F (1.5°C) is anticipated throughout the nights during May.Humidity
In Dell, the average relative humidity in May is 61%.Rainfall
In Dell, in May, during 13.7 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, there are 103.2 rainfall days, and 9.84" (250mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In Dell, in May, during 3.9 snowfall days, 2.4" (61mm) of snow is typically accumulated. In Dell, during the entire year, snow falls for 81.9 days and aggregates up to 31.65" (804mm) of snow.Daylight
The average length of the day in May in Dell is 14h and 51min.On the first day of May, sunrise is at 6:19 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 9:08 pm MDT.
Sunshine
In Dell, the average sunshine in May is 10.6h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Dell, MT
- Average high temperature in May: 55.6°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is December (24.3°F).
- Average low temperature in May: 34.7°F
The month with the highest average low temperature is July (47.1°F).
The coldest month (with the lowest average low temperature) is December (9.9°F).
Average pressure in May
Dell, MT
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Dell, MT
- Average wind speed in May: 6.2mph
The windiest months (with the highest average wind speed) are November and December (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in May
Dell, MT
- Average humidity in May: 61%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are July and August (43%).
Average rainfall in May
Dell, MT
- Average rainfall in May: 1.38"
The wettest month (with the highest rainfall) is June (1.73").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in May
Dell, 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 January (4.6 days).
Average snowfall in May
Dell, MT
- Average snowfall in May: 2.4"
The month with the highest snowfall is April (4.96").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Dell, MT
- Average snowfall days in May: 3.9 days
The month with the highest number of snowfall days is February (13.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Dell, MT
- Average daylight in May: 14h and 48min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 10h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in May
Dell, MT
- Average sunshine days in May: 12.2 days
The month with the most sunshine days is July (20.7 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in May
Dell, MT
- Average UV index in May: 4
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in May
Dell, MT
- Average cloud cover in May: 30
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in May
Dell, MT
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is February (4mi).
