Monthly weather forecast and climate
Keystone, SD

What is the coldest month in Keystone?

The coldest month in Keystone is January, with an average high-temperature of 33.8°F (1°C) and an average low-temperature of 10.4°F (-12°C).

How many days does it rain in Keystone?

In Keystone, during the entire year, the rain falls for 103 days and collects up to 17" (431mm) of precipitation.

What is the driest month in Keystone?

January is the month with the least rainfall. Rain falls for 7 days and accumulates 0.4" (9mm) of precipitation.

What is the month with the lowest UV index in Keystone?

January and December, with an average UV index of 1, are months with the lowest UV index.

What is the wettest month in Keystone?

Months with the most rainfall in Keystone, South Dakota, are May and June, with an average 3" (77mm) of precipitation.

What is the month with the highest UV index in Keystone?

June and July, with an average UV index of 9, are months with the highest UV index.

What is the warmest month in Keystone?

With an average high-temperature of 84.2°F (29°C) and an average low-temperature of 55.4°F (13°C), July is the warmest month.
Average rainfall - Keystone, SD
Average rainfall days - Keystone, SD

Months with the highest number of rainy days are May and June (12 days).
Months with the lowest number of rainy days are October and November (6 days).

Average daylight / Average sunshine - Keystone, SD
deutscheenglishespañolрусский中文