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Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Keystone, CO
Content continues below
May
Average Temperature
High
13°
Feels 12
Low
-2°
Feels -6
Average Precipitation
4 Days
Rain amount
3.7mm
Snow amount
5.5cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
11°
18
6°
19
8°
20
8°
21
8°
22
10°
23
12°
24
15°
25
17°
26
16°
27
16°
28
19°
29
19°
30
17°
31
16°
Forecast
Sunday, May 17, 2026
Day
11°
Feels 9
Wind
18 km/h SE
Gust
27 km/h
Humidity
31%
P.O.P
70%
Rain
~1 mm
Night
1°
Feels -3
Wind
18 km/h SE
Gust
27 km/h
Humidity
89%
P.O.P
90%
Snow
<1 cm
Rain
1-3 mm
Historical Averages
May 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.