May weather forecastIsmay, MT
May
Weather in May
May, the last month of the spring in Ismay, is a refreshing month, with temperature in the range of an average low of 45.3°F (7.4°C) and an average high of 63.5°F (17.5°C).Temperature
May's arrival coincides with a temperature rise, moving from April's cool 51.8°F (11°C) to an enjoyable 63.5°F (17.5°C). During the May nights, an average temperature of 45.3°F (7.4°C) is observed in Ismay, Montana.Humidity
In Ismay, the average relative humidity in May is 60%.Rainfall
The month with the most rainfall is May, when the rain falls for 15.7 days and typically aggregates up to 2.6" (66mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 1.7 snowfall days, in May, Ismay aggregates 1.38" (35mm) of snow. Throughout the year, there are 62.4 snowfall days, and 21.97" (558mm) of snow is accumulated.Daylight
In Ismay, Montana, the average length of the day in May is 15h and 2min.On the first day of May, sunrise is at 5:43 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 5:09 am and sunset at 8:44 pm MDT.
Sunshine
The average sunshine in May is 9.7h.UV index
In Ismay, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 during May translates into the following guidance:
Be vigilant - Suggestions to stave off sun damage are provided. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Ismay, MT
- Average high temperature in May: 63.5°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in May: 45.3°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in May
Ismay, MT
- Average pressure in May: 29.91"Hg
The months with the highest atmospheric pressure are January and February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in May
Ismay, MT
- Average wind speed in May: 11.1mph
The windiest months (with the highest average wind speed) are April and October (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (10.1mph).
Average humidity in May
Ismay, MT
- Average humidity in May: 60%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (46%).
Average rainfall in May
Ismay, MT
- Average rainfall in May: 2.6"
The wettest month (with the highest rainfall) is May (2.6").
The driest months (with the least rainfall) are January and December (0.55").
Average rainfall days in May
Ismay, MT
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (3.1 days).
Average snowfall in May
Ismay, MT
- Average snowfall in May: 1.38"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Ismay, MT
- Average snowfall days in May: 1.7 days
The month with the highest number of snowfall days is February (12 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Ismay, 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 42min).
- Average sunshine in May: 9h and 42min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in May
Ismay, MT
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in May
Ismay, MT
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Ismay, MT
- Average cloud cover in May: 36
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in May
Ismay, 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).
