May weather forecastSaint Ignatius, MT
May
Weather in May
May, the last month of the spring in Saint Ignatius, is a comfortable month, with an average temperature ranging between max 61°F (16.1°C) and min 36.7°F (2.6°C).Temperature
Saint Ignatius's transition into May brings a rise in the average high-temperature, moving from a frosty 48.7°F (9.3°C) in April to a comfortable 61°F (16.1°C). In stark contrast to the day's heat, the temperature dips to an average of 36.7°F (2.6°C) during May nights.Humidity
The average relative humidity in May is 67%.Rainfall
In May, the rain falls for 14.1 days. Throughout May, 1.26" (32mm) of precipitation is accumulated. In Saint Ignatius, during the entire year, the rain falls for 129.9 days and collects up to 13.5" (343mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Saint Ignatius aggregates 0.08" (2mm) of snow. In Saint Ignatius, during the entire year, snow falls for 67.1 days and aggregates up to 28.27" (718mm) of snow.Daylight
In May, the average length of the day in Saint Ignatius is 15h and 8min.On the first day of the month, sunrise is at 6:18 am and sunset at 8:48 pm. On the last day of May, sunrise is at 5:43 am and sunset at 9:24 pm MDT.
Sunshine
In May, the average sunshine is 10.5h.UV index
The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In May, the maximum UV index of 4 suggests this advice:
Heed the precautions - Suggestions to avoid sunburn are made. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Saint Ignatius, MT
- Average high temperature in May: 61°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in May: 36.7°F
The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in May
Saint Ignatius, MT
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Saint Ignatius, MT
- Average wind speed in May: 4.3mph
The windiest month (with the highest average wind speed) is April (4.8mph).
The calmest months (with the lowest average wind speed) are January, August and December (3.9mph).
Average humidity in May
Saint Ignatius, 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 (49%).
Average rainfall in May
Saint Ignatius, MT
- Average rainfall in May: 1.26"
The wettest month (with the highest rainfall) is June (2.2").
The driest months (with the least rainfall) are July and August (0.63").
Average rainfall days in May
Saint Ignatius, MT
- Average rainfall days in May: 14.1 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is August (7.4 days).
Average snowfall in May
Saint Ignatius, MT
- Average snowfall in May: 0.08"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Saint Ignatius, MT
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Saint Ignatius, MT
- Average daylight in May: 15h and 6min
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 30min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in May
Saint Ignatius, MT
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is July (20.8 days).
The month with the least sunshine days is February (11 days).
Average UV index in May
Saint Ignatius, 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 February and December (UV index 1).
Average cloud cover in May
Saint Ignatius, MT
- Average cloud cover in May: 33
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in May
Saint Ignatius, 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).
