Saint Vrain Creek 1 SE LyonsLNSC2
At a river or reservoir gauge/0.3 mi away/5,417 ft/80 ft above here
temp, wind, gust, humidity, pressure
Lyons, Colorado
Town in Boulder County, Colorado* WHAT...Sub-freezing temperatures falling to 26 to 32 degrees, coldest over the plains. * WHERE...Front Range Urban Corridor and all of the eastern plains. * WHEN...From midnight tonight to 9 AM MDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Take steps now to protect tender plants from the cold. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly.
39°
61°/38°
Clear·
Feels like 39°·Light air 2 mph SSW
Alert. A Freeze Warning is in force for Lyons until 9 AM tomorrow. Read the alert in full, and see what it means in the Field Book.
Now. Lyons is 39° and clear at 11 PM. The dew point is 34°, so the air feels dry and comfortable. Light air from the south-southwest at 2 mph.
Today and tonight. Tonight falls to about 31° by 6 AM, under a mostly clear sky. A freeze: protect plants and pipes. No rain is expected for the rest of the day.
The week. The warmest day ahead is Wednesday, near 77°, and the coolest tomorrow, near 59°. The days ahead look dry. The first freeze could come tomorrow, a low of 30°.
The sky now. The Moon is a waxing crescent, 26% lit, and stays below the horizon until dawn. The next full Moon is Sunday, Oct 25. Look for Saturn, bright in the south-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 10 minutes long, 2 minutes shorter than yesterday.
0UV Low
27Air quality
81%Humidity
3%Cloud
Now
11:00 PM
39feels39
now, clear
Today
Oct 15
6138
74%
15mph
Fri
Oct 16
5930
clear day
Sat
Oct 17
7635
clear day
Sun
Oct 18
7441
partly cloudy day
Mon
Oct 19
7043
mostly clear day
Tue
Oct 20
7442
mostly clear day
Wed
Oct 21
7745
partly cloudy day
39°
61°38°
59°30°
76°35°
74°41°
70°43°
74°42°
77°45°
As of 11:00 PM in Lyons, Colorado.
Air quality
The air at Lyons
Index 27, good, led by ozone. Read at 10 PM from its reporting area, Fort Collins (CO), 23 miles off.
27Good
- Ozone27Good-
The days ahead
Good each day through Fri Oct 16, led by fine particles. Yesterday measured 37, good.
GoodModerate
- 37YesterdayOct 14
- GoodTodayOct 15
- GoodFriOct 16
Smoke, the next 44 hours
No smoke near the ground through Sat 6 PM.
Precipitation
What has fallen at Lyons
0.06 in in the last 24 hours, 0.65 in over the last 3 days, to Thu 9 PM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.06in
- Last 3 days
- 0.65in
3 days agoLast 24 hours 9%
Visibility
How far you can see at Lyons, the next 44 hours
Visibility stays 10 miles or more through Sat 6 PM.
F
Now, today, and the week
On the radar over Lyons, ColoradoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture
Weather instrument stations by state
What is measuring near here
The 7 instruments nearest Lyons, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.
measured now5 instruments
Rank1,319of 2,650
Citizen station EW8375EW8375
In a volunteer observer's own ground/6.7 mi away/5,328 ft/9 ft below here
temp, humidity, wind, precip, pressure
At an airfield/6.8 mi away/5,056 ft/281 ft below here
temp, wind, gust, visibility, precip, pressure
Lily Lake (35)CO045
Beside a road/15.4 mi away/8,920 ft/3,583 ft above here
temp, pavement temp, wind, visibility, precip
Boulder 14 W94075
At a climate reference station/19.6 mi away/9,828 ft/4,491 ft above here
temp, humidity, wind, solar, precip
measured daily2 instruments
Lyons 0.3 NNECO-BO-146
In a volunteer observer's own ground/0.2 mi away/5,399 ft/62 ft above here
precip, snowfall, snow depth
Lyons 7STHUC2
At a cooperative observer's station/7.0 mi away/5,735 ft/398 ft above here
snowfall, snow depth, precip, high, low
Station report
The weather at Longmont/Vbrand, drawn
The nearest airport reporting now, 6.8 mi from Lyons, Colorado. From its report of Oct 15, 2026, 10:55 PM local time: 3 of its 6 sheets.
The sky
No cloud below 12,000 ft; visibility 10 mi or more.
The air
38.0 F with a dew point of 34.0 F, 85 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 900 ft up.
The wind
Calm.
The full report of Longmont/Vbrand, in 6 sheets, each beside the Field Book plates that explain it
What the snow tracker reads here
Every instrument in this state
0in
Snow on the ground
Measured at Lyons 7S (THUC2), 7.0 miles from here, read 15 Oct, 07:00. measured daily
Elsewhere in Colorado
41 places, each with its own forecast and its own instruments.
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Near Lyons
The nearest places, each with its own forecast and the instruments nearest it.
- Altonacommunity, 7 mi
- Longmontcity, 9 mi
- Jamestowntown, 10 mi
- Niwotcommunity, 10 mi
- Lazy Acrescommunity, 10 mi
- Glendalecommunity, 11 mi
- Berthoudtown, 11 mi
- Bark Ranchcommunity, 12 mi
- Gunbarrelcommunity, 12 mi
- Sunshinecommunity, 12 mi
- Pine Brook Hillcommunity, 13 mi
- Gold Hillcommunity, 13 mi