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
Williston experiences a temperature shift with the start of May, with average high-temperatures moving from a fresh 51.4°F (10.8°C) in April to a refreshing 64.8°F (18.2°C). In May, the temperature in Williston drops to an average of 46.4°F (8°C) at night.Humidity
The average relative humidity in May in Williston is 56%.Rainfall
In Williston, in May, during 13.4 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, in Williston, there are 94.7 rainfall days, and 12.52" (318mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Williston. During 0.6 snowfall days, in May, Williston aggregates 0.28" (7mm) of snow. In Williston, during the entire year, snow falls for 53.3 days and aggregates up to 13.86" (352mm) of snow.Daylight
In May, the average length of the day is 15h and 13min.On the first day of the month, sunrise is at 6:34 am and sunset at 9:08 pm. On the last day of May, sunrise is at 5:58 am and sunset at 9:46 pm CDT.
Sunshine
In May, the average sunshine is 9.9h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 during May leads to these advisories:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Williston in May?
What is the average humidity in May in Williston?
How much does it rain in Williston in May?
What is the last month it snows in Williston?
How many hours of daylight does Williston have in May?
When are sunrise and sunset in May in Williston?
How long on average sun shines in May in Williston?
What is the UV index reading in May in Williston?
Average temperature in May
Williston, ND
- Average high temperature in May: 64.8°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is February (20.8°F).
- Average low temperature in May: 46.4°F
The month with the highest average low temperature is July (61.3°F).
The coldest months (with the lowest average low temperature) are January and February (7°F).
Average pressure in May
Williston, ND
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in May
Williston, ND
- Average wind speed in May: 10.4mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is February (8.9mph).
Average humidity in May
Williston, ND
- Average humidity in May: 56%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (48%).
Average rainfall in May
Williston, ND
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days in May
Williston, ND
- Average rainfall days in May: 13.4 days
The month with the highest number of rainy days is June (14.2 days).
The month with the least rainy days is December (2.5 days).
Average snowfall in May
Williston, ND
- Average snowfall in May: 0.28"
The month with the highest snowfall is February (3.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Williston, ND
- Average snowfall days in May: 0.6 days
The month with the highest number of snowfall days is February (12.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Williston, ND
- Average daylight in May: 15h and 1min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 9h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in May
Williston, ND
- Average sunshine days in May: 15.2 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (13.5 days).
Average UV index in May
Williston, ND
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in May
Williston, ND
- Average cloud cover in May: 34
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 19).
Average visibility in May
Williston, ND
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Williston, North Dakota, USA
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