Keystone, CO Weather Forecast | 5 Day
Updated: Sun Sep 20th 2026 9:30 PM MDT
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Sunny
Sun 9-20-26
Sunny with a high of 54°F and a low of 34°F. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 15mph on average and gusts of 2.5mph at 10 PM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 56% at 11 PM and 55% being its lowest at 10 PM. Barometric pressure is its highest of 30.25inHg at 11 PM, a lowest point of 30.23inHg at 10 PM with an avg 30.24inHg.
- HI: 54°F
- LO: 34°F
- Rainfall: 17% | est. 0in
- Snowfall: 0% | est. 0in
- Wind
14.8 mph - Humidity
52% avg. - UV Index
7.9 - Air QualityGood
- Sunrise
06:49 AM - Sunset
07:04 PM - Moonrise
04:23 PM - Moonset
12:50 AM - Moon Phase
Waxing Gibbous
Sunny
Weather Tomorrow, Mon 9-21-26
Sunny with a high of 58°F and a low of 31°F. There's a very small chance of rainfall, only about 3%. Winds will be light at 10mph and gusts of 15.7mph at 7 PM. Humidity levels should be comfortable, sitting around 41% on average, the maximum being 64% at 6 AM and 18% being its lowest at 1 PM. Barometric pressure is its highest of 30.27inHg at 7 AM, a lowest point of 29.99inHg at 4 PM with an avg 30.15inHg.
- HI: 58°F
- LO: 31°F
- Rainfall: 3%
- Snowfall: 0%
- Wind
9.4 mph - Humidity
41% avg. - UV Index
8.1 - Air QualityGood
- Sunrise
06:50 AM - Sunset
07:03 PM - Moonrise
04:54 PM - Moonset
01:52 AM - Moon Phase
Waxing Gibbous
Sunny
Tue 9-22-26
Sunny with a high of 63°F and a low of 35°F. Rainfall expected to have a 62% chance with an estimated 0.22in. Winds will be light at 8mph and gusts of 13mph at 2 AM. The humidity will be on the higher side, averaging about 61%, the maximum being 92% at 9 PM and 24% being its lowest at 1 PM. Barometric pressure is its highest of 30.2inHg at 1 AM, a lowest point of 29.93inHg at 5 PM with an avg 30.11inHg.
- HI: 63°F
- LO: 35°F
- Rainfall: 62% | est. 0.22in
- Snowfall: 0%
- Wind
7.6 mph - Humidity
61% avg. - UV Index
8.2 - Air QualityGood
- Sunrise
06:51 AM - Sunset
07:01 PM - Moonrise
05:20 PM - Moonset
02:54 AM - Moon Phase
Waxing Gibbous
Overcast
Wed 9-23-26
Overcast with a high of 51°F and a low of 40°F. It will likey rain, having a 80% chance of a downpour with an estimated 0.15in. Winds will be light at 4mph and gusts of 13.9mph at 6 AM. The humidity will be on the higher side, averaging about 78%, the maximum being 87% at 9 PM and 62% being its lowest at 1 PM. Barometric pressure is its highest of 30.2inHg at 9 PM, a lowest point of 30.09inHg at 3 PM with an avg 30.15inHg.
- HI: 51°F
- LO: 40°F
- Rainfall: 80% | est. 0.15in
- Snowfall: 0%
- Wind
3.6 mph - Humidity
78% avg. - UV Index
4 - Air QualityGood
- Sunrise
06:52 AM - Sunset
07:00 PM - Moonrise
05:43 PM - Moonset
03:55 AM - Moon Phase
Waxing Gibbous
Scattered Showers
Thu 9-24-26
Scattered Showers with a high of 55°F and a low of 39°F. It will likey rain, having a 88% chance of a downpour with an estimated 0.58in. Winds will be light at 5mph and gusts of 14.5mph at 1 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 96% at 10 PM and 51% being its lowest at 2 PM. Barometric pressure is its highest of 30.28inHg at 10 PM, a lowest point of 30.07inHg at 2 PM with an avg 30.18inHg.
- HI: 55°F
- LO: 39°F
- Rainfall: 88% | est. 0.58in
- Snowfall: 0% | est. 1in
- Wind
4.3 mph - Humidity
80% avg. - UV Index
4.5 - Air QualityGood
- Sunrise
06:53 AM - Sunset
06:58 PM - Moonrise
06:04 PM - Moonset
04:56 AM - Moon Phase
Full Moon
Overcast
Fri 9-25-26
Overcast with a high of 56°F and a low of 36°F. Rainfall expected to have a 62% chance with an estimated 0.09in. Winds will be light at 6mph and gusts of 13.4mph at 3 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 95% at 12 AM and 41% being its lowest at 3 PM. Barometric pressure is its highest of 30.25inHg at 12 AM, a lowest point of 29.99inHg at 3 PM with an avg 30.14inHg.
- HI: 56°F
- LO: 36°F
- Rainfall: 62% | est. 0.09in
- Snowfall: 0% | est. 0.5in
- Wind
5.1 mph - Humidity
73% avg. - UV Index
4 - Air QualityGood
- Sunrise
06:54 AM - Sunset
06:56 PM - Moonrise
06:25 PM - Moonset
05:57 AM - Moon Phase
Full Moon
Currently
 |
37°F |
30.21 inHg.
Barometer 53%
Humidity NW 3.6 mph Wind |
| Cloudy | ||
National Outlook
Heavy Rain and Storms to Hit the Midwest, Ohio Valley, and Mid-Atlantic - 09-20 to 09-22
Sun Sep 20th 2026, 8:18am PDT
Read
Floods in the Southern High Plains and Storms in the East 09-23 to 09-27
Extended Forecast
Sun Sep 20th 2026, 8:19am PDT
Read
Sun Sep 20th 2026, 8:19am PDT
5 Day Forecast Nearby
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