Weather in Boulder, Wyoming
High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →
Boulder, WY
Sunday, May 17 at 3:54 AM
44
°
Overcast
Feels like
32°
Humidity
39%
Wind
18 mph
Sunrise
5:54 AM
Sunset
8:35 PM
Boulder, WY
Hour by hour · 24h
50°
9p
46°
10p
43°
11p
40°
12a
39°
1a
37°
2a
36°
3a
34°
4a
33°
5a
31°
6a
33°
7a
40°
8a
49°
9a
54°
10a
57°
11a
60°
12p
62°
1p
64°
2p
64°
3p
64°
4p
64°
5p
63°
6p
61°
7p
56°
8p
Boulder, WY
7-day forecast
- TodayMay 16Overcast—62°27°
- SundayMay 17Overcast24%49°28°
- MondayMay 18Heavy Snow89%41°29°
- TuesdayMay 19Snow89%51°29°
- WednesdayMay 20Light Drizzle10%54°37°
- ThursdayMay 21Mostly Clear14%57°33°
- FridayMay 22Overcast23%66°39°
Boulder, WY
Next 24 hours · Cold now
Boulder, WY
Anemometer · 24h winds · from true
From · True
NW
318° · veering 99°
Direction
NW
318°
Sustained
18
mph
Gust
30
mph
Peak 24h
31
avg 11
Beaufort · 4 · MOD 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
−24h−18h−12h−6hnow
Boulder, WY
Air quality
63
AQI
Moderate
- PM 2.5
- 3.1 μg/m³
- PM 10
- 5.5 μg/m³
- NO₂
- 0.5 μg/m³
- Ozone
- 104.0 μg/m³
- UV Index
- 0.0 Low
Boulder, WY
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:24 AM
Sunrise
5:54 AM
Daylight
14h 41m
Sunset
8:35 PM
Civil dusk
3:09 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Boulder, WY
The moon
New Moon
0% illuminated
- Moonrise
- 11:59 AM
- Moonset
- 3:13 AM
- In sign
- ♊︎ Gemini
Boulder, WY
Microseason · 28 of 72
May 16–20
High country wildflowers peak
bird
Boulder at a glance
- Today vs. normal: 25°F below the seasonal normal for this latitude
- Last frost: May 2 (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
Cool-season window is open
As of May 17, the cool-season window is open or about to open. Direct-sow peas, lettuce, spinach, radishes, and brassicas now. Hold off on warm-season crops until 1–2 weeks after the last spring frost (around May).