Weather in Keystone in Autumn
| September | October | November | ||||
| Average day temperature: | 62.8°F | 49.6°F | 35.6°F | |||
| Average night temperature: | 39.3°F | 28.3°F | 16.2°F | |||
| Number of sunny days: | 19 days | 19 days | 17 days | |||
| Day length: | 11.8 - 13.0 h. | 10.5 - 11.8 h. | 9.6 - 10.5 h. | |||
| Number of rainy days: | 2 days | 1 day | 0 days | |||
| Precipitation totals: | 0.8 in. | 1.0 in. | 0.9 in. | |||
Day & Night air temperature, °F
September
October
November
0
10
20
30
40
50
60
70
80
35.6
49.6
62.8
16.2
28.3
39.3
| Day temperature | Night temperature |
Precipitation total, in.
September
October
November
0.0
0.2
0.3
0.5
0.7
0.9
1.0
1.2
1.4
0.9
1
0.8
Sunny, partly cloudy and cloudy days
September
October
November
0
5
10
15
20
25
30
35
7
5
3
6
7
9
17
19
19
| Cloudy days | Partly cloudy days | Sunny days |
weather in
winter
winter
| Keystone |
weather in
spring
spring
| Keystone |
weather in
summer
summer
| Keystone |
weather in
autumn
autumn
| Keystone |
Wind speed, mph
September
October
November
0.0
0.9
1.8
2.7
3.6
4.5
5.4
6.3
4.8
5.2
4.9
Average sunny hours
September
October
November
0
1
2
3
4
5
6
7
8
9
10
11
6.4
7.7
9.4
Sunny hours are calculated based on the average daily number of hours while sunlight can reach the ground. It depends on day length and cloudiness during the day.
Best time for vacation in Keystone
Keystone on a weather map
Leaflet | Tiles © Esri
Places in USA:
Name
°F
24 Hours Forecast
Keystone
Local time: 21:28
April 05, saturday
0000
18°F
NW
5 mph
5 mph
0300
16°F
NW
6 mph
6 mph
0600
14°F
NW
4 mph
4 mph
0900
19°F
NW
1 mph
1 mph
1200
30°F
SE
5 mph
5 mph
1500
32°F
SE
8 mph
8 mph
1800
27°F
S
7 mph
7 mph
2100
12°F
N
1 mph
1 mph
