Weather in Thornton, Colorado
High country wildflowers peak. Day 58 of spring. Read this microseason across nine climate regions →
Thornton, CO
Saturday, May 16 at 11:55 PM
78
°
Mostly Clear
Feels like
71°
Humidity
20%
Wind
7 mph
Sunrise
5:43 AM
Sunset
8:08 PM
Thornton, CO
Hour by hour · 24h
86°
5p
86°
6p
82°
7p
76°
8p
75°
9p
75°
10p
74°
11p
67°
12a
65°
1a
63°
2a
62°
3a
59°
4a
57°
5a
56°
6a
58°
7a
65°
8a
70°
9a
74°
10a
77°
11a
79°
12p
82°
1p
83°
2p
85°
3p
85°
4p
Thornton, CO
7-day forecast
- TodayMay 16Overcast16%78°57°
- SundayMay 17Light Drizzle36%70°51°
- MondayMay 18Light Snow Shwrs99%51°34°
- TuesdayMay 19Light Drizzle77%50°35°
- WednesdayMay 20Overcast77%69°42°
- ThursdayMay 21Heavy Drizzle37%59°48°
- FridayMay 22Overcast28%71°46°
Thornton, CO
Next 24 hours · Warm now
Thornton, CO
Anemometer · 24h winds · from true
From · True
ESE
116° · backing 110°
Direction
ESE
116°
Sustained
7
mph
Gust
13
mph
Peak 24h
19
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
Thornton, CO
Air quality
74
AQI
Moderate
- PM 2.5
- 5.8 μg/m³
- PM 10
- 9.1 μg/m³
- NO₂
- 2.1 μg/m³
- Ozone
- 133.0 μg/m³
- UV Index
- 1.4 Low
Thornton, CO
Almanac · Saturday, May 16
Flowers blooming in late autumn, a sure sign of a bad winter coming.
Civil dawn
11:14 AM
Sunrise
5:43 AM
Daylight
14h 25m
Sunset
8:08 PM
Civil dusk
2:40 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Thornton, CO
The moon
New Moon
0% illuminated
- Moonrise
- 11:07 AM
- Moonset
- 1:24 AM
- In sign
- ♉︎ Taurus
Thornton, CO
Microseason · 28 of 72
May 16–20
High country wildflowers peak
weather
Thornton at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: April 16 (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 16, 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.