🇺🇸 Weather in Boulder
Map Overlays:
Hourly Forecast for Boulder
18:00
16°
9%
19:00
15°
10%
20:00
14°
10%
21:00
12°
10%
22:00
13°
11%
23:00
12°
9%
00:00
10°
14%
01:00
12°
12%
02:00
12°
13%
03:00
9°
15%
04:00
12°
13%
05:00
12°
14%
06:00
8°
18%
07:00
12°
14%
08:00
12°
14%
09:00
13°
12%
10:00
19°
10%
11:00
20°
10%
12:00
19°
10%
13:00
21°
10%
14:00
20°
10%
15:00
21°
9%
16:00
21°
10%
17:00
19°
11%
14-Day Forecast for Boulder
2026-10-21
Overcast
22° /
9°
2026-10-22
Overcast
21° /
8°
2026-10-23
Overcast
25° /
10°
2026-10-24
Overcast
15° /
8°
2026-10-25
Patchy rain nearby
8° /
6°
2026-10-26
Sunny
11° /
2°
2026-10-27
Sunny
19° /
1°
Additional Forecasts for Boulder
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 158.0 μg/m³
O₃ (Ozone) 103.0 μg/m³
NO₂ (Nitrogen Dioxide) 8.4 μg/m³
SO₂ (Sulphur Dioxide) 1.1 μg/m³
PM2.5 (Fine particles) 5.6 μg/m³
PM10 (Coarse particles) 5.9 μg/m³
Historical Weather
Weather Forecasts for Other Cities in United States
Weather in Boulder — FAQ
Answers refreshed each request based on current conditions in Boulder.
What is the weather like right now in Boulder?
Right now in Boulder, United States the temperature is 20.6°C (feels like 18.8°C), with cloudy. Relative humidity is 33% and wind is 3.6 km/h.
What is today's high and low temperature in Boulder?
Today's forecast high in Boulder is 22.0°C and the overnight low is 8.6°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Boulder today?
The chance of precipitation in Boulder today is 6%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Boulder differ from nearby cities?
Even short distances can change temperatures noticeably. Boulder's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.