June weather forecastKeystone, SD
June
Weather in June
June sees Keystone, South Dakota celebrating summer with a significant leap in ambient temperature. The average temperature continues to climb, achieving a hot 74.1°F (23.4°C) this month, signaling the full swing of summer. It is about this time that, with the sun high up most of the day, outdoor activities become increasingly enjoyable. Humidity levels decrease significantly compared to May, leading to dry and comfortable weather. Progressing into July, the weather continues to heat up, peaking to the warmest conditions of the year.Temperature
An increase in the average high-temperature marks June, moving from May's refreshing 61°F (16.1°C) to a moderately hot 74.1°F (23.4°C). During June, Keystone records an average temperature of 53.2°F (11.8°C) at night.Humidity
In Keystone, the average relative humidity in June is 60%.Rainfall
June is the month with the most rainfall. Rain falls for 18 days and accumulates 3.19" (81mm) of precipitation.Snowfall
June through August are months without snowfall.Daylight
June has the longest days of the year, with an average of 15h and 24min of daylight.On the first day of June in Keystone, sunrise is at 5:13 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:14 am and sunset at 8:40 pm MDT.
Sunshine
In Keystone, the average sunshine in June is 11.3h.UV index
In Keystone, the average daily maximum UV index in June is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 5 in June translates into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Keystone, SD
- Average high temperature in June: 74.1°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (29.8°F).
- Average low temperature in June: 53.2°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).
Average pressure in June
Keystone, SD
- Average pressure in June: 29.84"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in June
Keystone, SD
- Average wind speed in June: 8.3mph
The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in June
Keystone, SD
- Average humidity in June: 60%
The months with the highest relative humidity are January and February (77%).
The months with the lowest relative humidity are August and September (52%).
Average rainfall in June
Keystone, SD
- Average rainfall in June: 3.19"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in June
Keystone, SD
- Average rainfall days in June: 18 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is November (4.5 days).
Average snowfall in June
Keystone, SD
- Average snowfall in June: 0"
The month with the highest snowfall is April (7.24").
The months with the least snowfall are June, July and August (0").
Average snowfall days in June
Keystone, SD
- Average snowfall days in June: 0 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in June /
Average sunshine in June
Keystone, SD
- Average daylight in June: 15h and 24min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in June: 11h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in June
Keystone, SD
- Average sunshine days in June: 7.9 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (7.8 days).
Average UV index in June
Keystone, SD
- Average UV index in June: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in June
Keystone, SD
- Average cloud cover in June: 23
The month with the most cloud cover is April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in June
Keystone, SD
- Average visibility in June: 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).
