May weather forecastOlney, MT
May
Weather in May
The last month of the spring, May, is a moderate month in Olney, Montana, with an average temperature fluctuating between 34.9°F (1.6°C) and 59.7°F (15.4°C).Temperature
Olney's weather in May shows a rise in the average high-temperature, moving up from April's frosty 46.6°F (8.1°C) to a refreshing 59.7°F (15.4°C). With a significant daily temperature differential, Olney's nighttime temperature in May falls to an average of 34.9°F (1.6°C).Humidity
In May, the average relative humidity in Olney is 68%.Rainfall
In Olney, during May, the rain falls for 14 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, there are 136.9 rainfall days, and 16.46" (418mm) of precipitation is accumulated.Snowfall
Months with snowfall in Olney are January through May, September through December. May is the last month it regularly snows in Olney, Montana. During 1.2 snowfall days, in May, Olney aggregates 0.43" (11mm) of snow. Throughout the year, there are 107.6 snowfall days, and 51.42" (1306mm) of snow is accumulated.Daylight
In Olney, the average length of the day in May is 15h and 16min.On the first day of May, sunrise is at 6:16 am and sunset at 8:53 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 9:31 pm MDT.
Sunshine
In May, the average sunshine is 10.2h.UV index
In Olney, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, the maximum UV index of 4 suggests this advice:
Prioritize safety - Suggestions to prevent sun damage are offered. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Olney, MT
- Average high temperature in May: 59.7°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is December (25.5°F).
- Average low temperature in May: 34.9°F
The month with the highest average low temperature is August (45°F).
The coldest month (with the lowest average low temperature) is February (12.7°F).
Average pressure in May
Olney, MT
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Olney, MT
- Average wind speed in May: 4.3mph
The windiest month (with the highest average wind speed) is April (4.5mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity in May
Olney, MT
- Average humidity in May: 68%
The month with the highest relative humidity is January (94%).
The months with the lowest relative humidity are July and August (56%).
Average rainfall in May
Olney, MT
- Average rainfall in May: 1.5"
The wettest month (with the highest rainfall) is March (1.93").
The driest month (with the least rainfall) is August (0.51").
Average rainfall days in May
Olney, MT
- Average rainfall days in May: 14 days
The month with the highest number of rainy days is April (16.6 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in May
Olney, MT
- Average snowfall in May: 0.43"
The month with the highest snowfall is January (11.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Olney, MT
- Average snowfall days in May: 1.2 days
The month with the highest number of snowfall days is December (21.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Olney, MT
- Average daylight in May: 15h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 10h and 12min
The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in May
Olney, MT
- Average sunshine days in May: 14 days
The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is March (6.3 days).
Average UV index in May
Olney, 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, November and December (UV index 1).
Average cloud cover in May
Olney, MT
- Average cloud cover in May: 35
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in May
Olney, MT
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
