Weather in Longmont, Colorado
High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →
Longmont, CO
Sunday, May 17 at 1:04 AM
76
°
Partly Cloudy
Feels like
70°
Humidity
24%
Wind
7 mph
Sunrise
5:43 AM
Sunset
8:10 PM
Longmont, CO
Hour by hour · 24h
83°
7p
79°
8p
74°
9p
72°
10p
67°
11p
62°
12a
61°
1a
60°
2a
57°
3a
55°
4a
53°
5a
51°
6a
54°
7a
62°
8a
71°
9a
74°
10a
77°
11a
81°
12p
82°
1p
83°
2p
84°
3p
84°
4p
84°
5p
82°
6p
Longmont, CO
7-day forecast
- TodayMay 16Overcast19%77°57°
- SundayMay 17Rain44%71°51°
- MondayMay 18Light Snow Shwrs100%50°33°
- TuesdayMay 19Drizzle70%53°30°
- WednesdayMay 20Overcast70%69°37°
- ThursdayMay 21Drizzle40%61°46°
- FridayMay 22Overcast28%72°41°
Longmont, CO
Next 24 hours · Warm now
Longmont, CO
Anemometer · 24h winds · from true
From · True
SSE
165° · veering 152°
Direction
SSE
165°
Sustained
7
mph
Gust
12
mph
Peak 24h
31
avg 8
Beaufort · 2 · LIGHT 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
Longmont, CO
Air quality
90
AQI
Moderate
- PM 2.5
- 6.2 μg/m³
- PM 10
- 8.5 μg/m³
- NO₂
- 6.9 μg/m³
- Ozone
- 114.0 μg/m³
- UV Index
- 0.2 Low
Longmont, CO
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:14 AM
Sunrise
5:43 AM
Daylight
14h 27m
Sunset
8:10 PM
Civil dusk
2:41 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Longmont, CO
The moon
New Moon
0% illuminated
- Moonrise
- 11:51 AM
- Moonset
- 2:43 AM
- In sign
- ♉︎ Taurus
Longmont, CO
Microseason · 28 of 72
May 16–20
High country wildflowers peak
bird
Longmont at a glance
- Today vs. normal: 5°F above the seasonal normal for this latitude
- Last frost: April 17 (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.