Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in Keystone, Colorado

High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →

Keystone, CO
Sunday, May 17 at 2:10 AM
48
°
Overcast
Feels like
39°
Humidity
29%
Wind
10 mph
Sunrise
5:48 AM
Sunset
8:12 PM
Keystone, CO
Hour by hour · 24h
52°
8p
47°
9p
44°
10p
42°
11p
39°
12a
39°
1a
39°
2a
40°
3a
34°
4a
33°
5a
33°
6a
34°
7a
43°
8a
48°
9a
52°
10a
55°
11a
57°
12p
58°
1p
58°
2p
59°
3p
58°
4p
58°
5p
57°
6p
54°
7p
L 33°H 59°
Keystone, CO
7-day forecast
  1. Today
    May 16
    Overcast
    15%
    55°36°
  2. Sunday
    May 17
    Overcast
    22%
    49°31°
  3. Monday
    May 18
    Heavy Snow
    92%
    38°22°
  4. Tuesday
    May 19
    Light Snow Shwrs
    65%
    45°21°
  5. Wednesday
    May 20
    Light Snow
    65%
    49°24°
  6. Thursday
    May 21
    Light Snow Shwrs
    37%
    47°28°
  7. Friday
    May 22
    Light Drizzle
    22%
    52°25°
Keystone, CO
Next 24 hours · Cool now
FREEZING 32°25°45°65°12a6a12p6pnow 52°high 59°low 33°
Keystone, CO
Anemometer · 24h winds · from true
NESW
From · True
SW
228° · veering 15°
Direction
SW
228°
Sustained
10
mph
Gust
22
mph
Peak 24h
38
avg 9
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 9 · pk 38 @ 10:00p
−24h−18h−12h−6hnow
Light breeze veering 15° from the sw.
Keystone, CO
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
679.0
-0.1 mb in 3h · falling rapidly · 20.05 inHg
Now
679.0
mb
3h
-0.1
mb
12h
-5.9
mb
24h
-1.4
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 675–686
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Keystone, CO
Air quality
77
AQI
Moderate
PM 2.5
1.0 μg/m³
PM 10
1.3 μg/m³
NO₂
1.5 μg/m³
Ozone
104.0 μg/m³
UV Index
0.0 Low
Keystone, CO
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:19 AM
Sunrise
5:48 AM
Daylight
14h 24m
Sunset
8:12 PM
Civil dusk
2:43 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Keystone, CO
The moon
New Moon
0% illuminated
Moonrise
11:56 AM
Moonset
2:45 AM
In sign
♉︎ Taurus
Keystone, CO
Microseason · 28 of 72
May 16–20

High country wildflowers peak

bird
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Keystone at a glance

  • Today vs. normal: 24°F below the seasonal normal for this latitude
  • Last frost: April 14 (climatological average for this latitude)
  • Microseason: 28 of 72, May 16–20
  • Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.

Right now in the garden

Warm-season window is open

As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.

All cities in Colorado →

ZIP codes in Keystone

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.