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
The arrival of May brings an increase in high-temperatures, moving from a fresh 52.9°F (11.6°C) in April to a refreshing 63.5°F (17.5°C). Belle Fourche experiences a consistent average temperature of 44.6°F (7°C) throughout the nights in May.Humidity
The average relative humidity in May in Belle Fourche is 63%.Rainfall
May is the month with the most rainfall. Rain falls for 14.3 days and accumulates 2.05" (52mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 1.7 snowfall days, in May, Belle Fourche aggregates 1.77" (45mm) of snow. Throughout the year, in Belle Fourche, South Dakota, there are 52.1 snowfall days, and 23.54" (598mm) of snow is accumulated.Daylight
In Belle Fourche, the average length of the day in May is 14h and 50min.On the first day of May, sunrise is at 5:44 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:13 am and sunset at 8:33 pm MDT.
Sunshine
In May, the average sunshine is 10.1h.UV index
In May, the average daily maximum UV index in Belle Fourche is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, a regular UV index of 5 translates into these guidelines:
Exercise prevention - Protecting skin and eyes from harm is required. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Belle Fourche?
What is the average humidity in May in Belle Fourche?
What is the wettest month in Belle Fourche?
How many days does it rain in May in Belle Fourche?
What is the last month it snows in Belle Fourche?
What is the average length of the day in May in Belle Fourche?
When is the sunrise / sunset in May in Belle Fourche?
How long on average sun shines in May in Belle Fourche?
How high is the UV index in May in Belle Fourche?
Average temperature in May
Belle Fourche, SD
- Average high temperature in May: 63.5°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is December (30.4°F).
- Average low temperature in May: 44.6°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is February (17.1°F).
Average pressure in May
Belle Fourche, SD
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in May
Belle Fourche, SD
- Average wind speed in May: 9.7mph
The windiest months (with the highest average wind speed) are January and October (10.4mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in May
Belle Fourche, SD
- Average humidity in May: 63%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (47%).
Average rainfall in May
Belle Fourche, SD
- Average rainfall in May: 2.05"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in May
Belle Fourche, SD
- Average rainfall days in May: 14.3 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in May
Belle Fourche, SD
- Average snowfall in May: 1.77"
The month with the highest snowfall is April (4.88").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Belle Fourche, SD
- Average snowfall days in May: 1.7 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Belle Fourche, SD
- Average daylight in May: 14h and 5min
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 1min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in May
Belle Fourche, SD
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is April (12.6 days).
Average UV index in May
Belle Fourche, SD
- 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 January, February, November and December (UV index 2).
Average cloud cover in May
Belle Fourche, SD
- Average cloud cover in May: 33
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in May
Belle Fourche, SD
- 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).
Belle Fourche, South Dakota, USA
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