Best time to visit Keystone

Q: When is the best time to visit Keystone?

The best time to visit Keystone is June and August based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Q: Which is the hottest month in Keystone?

The hottest time of year in Keystone is normally July. Expect maximum daytime temperatures to reach 29°C with moderate heat and humidity.

Q: Which month has the most rain in Keystone?

In terms of rainfall, May is usually the wettest month in Keystone with 77mm on average. There are normally 12 days in May with some rain.

Q: When is it sunniest in Keystone?

The sunniest time of year in Keystone is normally August with bright sunshine on average for 73% of daylight hours; that's 10 hours of sunshine per day.

Find the best time to visit Keystone and plan your perfect trip in 2024/2025. Get holiday inspiration, weather guides, travel advice and find great deals.

Keystone by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Dakota

Skyscanner: Lowest flight prices by destination

Sale

Explore lowest airfares by destinations worldwide
Find the cheapest month or filter by route or month
Prices shown found on Skyscanner in last 8 days

Go to Skyscanner deal >>

View all Skyscanner offers

When is the best time to visit Keystone?

The best time to visit Keystone is June and August based on the following average weather conditions.

Maximum daytime temperature = 72 - 86°F [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

1
Jan
1.5
Feb
2
Mar
2
Apr
4
May
5
Jun
4.5
Jul
5
Aug
4
Sep
1.5
Oct
1
Nov
1
Dec

Change criteria

Max Day Temperature (°F)

34
Jan
37
Feb
45
Mar
57
Apr
66
May
77
Jun
84
Jul
82
Aug
73
Sep
61
Oct
45
Nov
36
Dec

Hours of Sunshine (daily)

5
Jan
6
Feb
8
Mar
8
Apr
9
May
10
Jun
11
Jul
10
Aug
9
Sep
7
Oct
5
Nov
5
Dec

Which is the hottest month in Keystone?

The hottest time of year in Keystone is normally July. Expect maximum daytime temperatures to reach 84°F with moderate heat and humidity.

Which month has the most rain in Keystone?

In terms of rainfall, May is usually the wettest month in Keystone with 3.0 inches on average. There are normally 12 days in May with some rain.

When is it sunniest in Keystone?

The sunniest time of year in Keystone is normally August with bright sunshine on average for 73% of daylight hours; that's 10 hours of sunshine per day.