Boulder, Colorado weather
United States · America/Denver · 40.01, -105.27
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Boulder, CO Weather Today
Current conditions, hourly and 7 day forecast, official severe weather alerts, and air quality for Boulder, Colorado. Every section shows where the data came from and when it was last checked.
Your briefing
Boulder, Colorado
- Right now
- No official warning for this location. 42° and clear sky.Observed
- Next few hours
- No rain in the forecast for the next few hours.Forecast
- Your day
- Best outdoor window: 6 AM to 3 PM.Our reading
Official warnings for this location come from NOAA / National Weather Service. Lines marked Our reading are WeatherSignal’s reading of the measurements and forecast, not an official statement.
Boulder, Colorado
42°
Clear sky
Feels like 36° · High 73° · Low 35°
Clear sky here right now. Nothing falling.
Cold and clear early this morning. 42° and feels like 36°. Today's high is 73°.
- Sunrise 12:00 AM
- Today's high 73°
- Rain next 6 hrs 0%
Next few hours
Now
42°
—
10 PM
40°
—
11 PM
39°
—
12 AM
37°
—
1 AM
36°
—
- Rain chance
- 0%
- Wind
- 3 mph WSW
- Humidity
- 67%
- Air quality
- No reading
Source updated: 3:39:17 AM · WeatherSignal checked: 3:39:17 AM
What matters today
Six quick answers for Boulder. Tap Why? on any of them to see the reasoning.
Umbrella
Nah (Good)
Best time
11 AM (Good)
Dog walk
9 AM (Good)
Car wash
Go for it (Good)
Cookout
Doable with a plan (Mixed)
Windows
Keep them up (Not good)
Today's Signal
Good day
82/100
Mostly favorable, but the cold and poor visibility will make it less comfortable outside.
Feels like 36° · Visibility 0.0 mi
Today is about 6° warmer than the rest of the week.
See exactly how this number was worked out
Every location starts at 100. Points come off for heat, cold, rain, wind, UV, humidity, poor visibility, and any official alert. Nothing is ever added back.
- Starting score100
- Feels like 36°: cold-8
- Visibility 0.0 mi-10
- Final Signal82
Next 12 hours
Steady conditions, but the temperature swings about 20° across the next 12 hours.
- 12 AMSunrise
- 4 AMCoolest stretch · 35°
- 9 AMWarmest stretch · 55°
- 10 PM—40 degrees, 0 percent chance of rain
- 11 PM—39 degrees, 0 percent chance of rain
- 12 AM—37 degrees, 0 percent chance of rain
- 1 AM—36 degrees, 0 percent chance of rain
- 2 AM—36 degrees, 0 percent chance of rain
- 3 AM—36 degrees, 0 percent chance of rain
- 4 AM—35 degrees, 0 percent chance of rain
- 5 AM—36 degrees, 0 percent chance of rain
- 6 AM—36 degrees, 0 percent chance of rain
- 7 AM—39 degrees, 0 percent chance of rain
- 8 AM—44 degrees, 0 percent chance of rain
- 9 AM—55 degrees, 0 percent chance of rain
The line is temperature by hour. The number under each hour is the chance of rain. Scroll sideways for the full 12 hours.
Next change
It warms up through the next several hours
Temperatures climb from about 40° to 55°, topping out near 55°. There is no meaningful rain signal in the next several hours.
WeatherSignal NOW: Boulder, Colorado
One number for everything happening around you, from 0 to 100.
96
NORMAL
Nothing here needs your attention right now.
Tap any line to see exactly what added or subtracted points. Every rule is published on our methodology page. This is an informational signal, not a safety rating: official warnings always come first.
What this means
Generated from the forecast values above using fixed rules: not an AI guess.
- No significant precipitation is expected in the next 24 hours.
Next 24 hours
Will it rain during your commute? When does the storm arrive?
See all 47 hours (2 days) — free
| Time | Condition | Temp | Feels | Precip % | Amount | Wind | Humidity |
|---|---|---|---|---|---|---|---|
| 10 PM | Clear sky | 40° | 33° | 0% | 0.00″ | 4 WSW | 66% |
| 11 PM | Clear sky | 39° | 31° | 0% | 0.00″ | 4 WSW | 65% |
| 12 AM | Clear sky | 37° | 28° | 0% | 0.00″ | 5 WSW | 67% |
| 1 AM | Clear sky | 36° | 27° | 0% | 0.00″ | 6 WSW | 68% |
| 2 AM | Clear sky | 36° | 26° | 0% | 0.00″ | 7 WSW | 68% |
| 3 AM | Clear sky | 36° | 25° | 0% | 0.00″ | 8 WSW | 69% |
| 4 AM | Clear sky | 35° | 24° | 0% | 0.00″ | 9 WSW | 69% |
| 5 AM | Clear sky | 36° | 24° | 0% | 0.00″ | 9 WSW | 67% |
| 6 AM | Clear sky | 36° | 25° | 0% | 0.00″ | 9 WSW | 63% |
| 7 AM | Clear sky | 39° | 27° | 0% | 0.00″ | 10 WSW | 55% |
| 8 AM | Clear sky | 44° | 33° | 0% | 0.00″ | 10 WSW | 47% |
| 9 AM | Clear sky | 55° | 48° | 0% | 0.00″ | 9 WSW | 39% |
| 10 AM | Clear sky | 65° | 61° | 0% | 0.00″ | 6 NW | 24% |
| 11 AM | Clear sky | 68° | 64° | 0% | 0.00″ | 6 ENE | 23% |
| 12 PM | Clear sky | 70° | 66° | 0% | 0.00″ | 4 ENE | 26% |
| 1 PM | Clear sky | 71° | 68° | 0% | 0.00″ | 5 E | 26% |
| 2 PM | Clear sky | 73° | 69° | 0% | 0.00″ | 5 E | 25% |
| 3 PM | Clear sky | 73° | 69° | 0% | 0.00″ | 5 E | 24% |
| 4 PM | Clear sky | 72° | 69° | 0% | 0.00″ | 4 E | 24% |
| 5 PM | Clear sky | 70° | 66° | 0% | 0.00″ | 3 E | 30% |
| 6 PM | Clear sky | 64° | 60° | 0% | 0.00″ | 2 SSW | 37% |
| 7 PM | Clear sky | 55° | 48° | 0% | 0.00″ | 7 WSW | 42% |
| 8 PM | Clear sky | 48° | 39° | 0% | 0.00″ | 9 WSW | 54% |
| 9 PM | Clear sky | 44° | 35° | 0% | 0.00″ | 8 WSW | 60% |
7-day forecast
Confidence decreases the further out you look.
Today
Clear sky
73° / 35°
- Precip:
- 0% · 0.00″
- Wind:
- 10 mph
- UV:
- 5.5
- Sun:
- 12 AM to 12 PM
Sun, Oct 18
Partly cloudy
70° / 43°
- Precip:
- 0% · 0.00″
- Wind:
- 11 mph
- UV:
- 5.3
- Sun:
- 12 AM to 12 PM
Mon, Oct 19
Overcast
63° / 46°
- Precip:
- 0% · 0.00″
- Wind:
- 6 mph
- UV:
- 5.1
- Sun:
- 12 AM to 12 PM
Tue, Oct 20
Clear sky
67° / 42°
- Precip:
- 0% · 0.00″
- Wind:
- 5 mph
- UV:
- 0.0
- Sun:
- 12 AM to 12 PM
Wed, Oct 21
Clear sky
67° / 45°
- Precip:
- 0% · 0.00″
- Wind:
- 5 mph
- UV:
- 0.0
- Sun:
- 12 AM to 12 PM
Lower confidence: long-range outlook, not a certainty.
Thu, Oct 22
Clear sky
68° / 52°
- Precip:
- 0% · 0.00″
- Wind:
- 6 mph
- UV:
- 0.0
- Sun:
- 12 AM to 12 PM
Lower confidence: long-range outlook, not a certainty.
Fri, Oct 23
Clear sky
65° / 47°
- Precip:
- 0% · 0.00″
- Wind:
- 7 mph
- UV:
- 0.0
- Sun:
- 12 AM to 12 PM
Lower confidence: long-range outlook, not a certainty.
Forecasts describe likely conditions, not guaranteed outcomes. Official warnings from your national weather service always take precedence over anything shown here.
Boulder hourly weather
Hour by hour, out to eight days ahead.
Boulder 7 day forecast
Highs, lows and rain chance for the week.
Air quality detail
Pollutants, category, and official guidance.