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Current conditions

28.3° / 15.0° Mainly clear
Feels like
25.1° / 11.6°
Humidity
—
Wind
16.8 km/h (gusts 28.8)
UV index
6.1
Sunrise / sunset
06:59 / 18:39
Daylight
11.7 hrs
Last updated 4 hours ago

7-day forecast

7-day forecast
Date Weather High Low Feels like Precip Rain Wind UV
Sat 3 Oct Mainly clear 28.3° 15.0° 25.1° / 11.6° 0.0 mm 5% 16.8 km/h 6.1
Sun 4 Oct Clear sky 25.6° 9.6° 22.5° / 6.5° 0.0 mm 10% 14.3 km/h 6.0
Mon 5 Oct Light drizzle 31.1° 15.1° 28.0° / 10.6° 0.5 mm 1% 23.4 km/h 5.9
Tue 6 Oct Light drizzle 28.9° 17.0° 25.7° / 13.0° 0.4 mm 12% 26.5 km/h 5.0
Wed 7 Oct Clear sky 28.8° 15.6° 24.6° / 11.1° 0.0 mm 6% 17.4 km/h 5.9
Thu 8 Oct Clear sky 30.2° 15.4° 27.4° / 10.6° 0.0 mm 2% 19.8 km/h 5.9

Air quality

37
Good

US Air Quality Index

European AQI: 37

PM2.5
5.1 µg/m³
PM10
5.4 µg/m³
Ozone (O₃)
94.0 µg/m³
NOâ‚‚
3.5 µg/m³
SOâ‚‚
0.6 µg/m³
CO
162.0 µg/m³
UV index
7.1
Dust
0.0 µg/m³
Measured 10 hours ago. Source: Open-Meteo.

Climate through the year

Now: October
-10° 0° 10° 20° 30° Jan: 25 mm Feb: 38 mm Mar: 56 mm Apr: 49 mm May: 99 mm Jun: 40 mm Jul: 25 mm Aug: 32 mm Sep: 27 mm Oct: 20 mm Nov: 25 mm Dec: 24 mm Jan: 2°C / -9°C Feb: 3°C / -10°C Mar: 9°C / -5°C Apr: 14°C / -0°C May: 19°C / 6°C Jun: 26°C / 12°C Jul: 30°C / 15°C Aug: 29°C / 14°C Sep: 26°C / 11°C Oct: 18°C / 4°C Nov: 10°C / -2°C Dec: 8°C / -4°C Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Average high and low, °C Rainfall, mm

Temperature by month

Precipitation and rain days

Sunshine, UV and humidity

Best months to visit

Best months to visit
Month Rating Avg high Avg low Rain days Sun (hrs) Humidity
September Excellent · 93 26.0°C 10.5°C 5.2 336.0 47.4%
June Excellent · 91 26.4°C 12.1°C 6.8 378.0 52.5%
July Good · 75 30.0°C 14.8°C 6.0 406.1 48.8%
October Good · 71 18.3°C 4.3°C 4.1 303.8 50.4%
August Good · 69 28.9°C 14.4°C 8.1 378.2 51.5%
May Good · 62 19.0°C 5.5°C 12.2 362.7 60.0%
November Fair · 53 10.4°C -2.3°C 4.6 252.0 53.5%
February Fair · 49 3.1°C -9.9°C 6.8 249.2 59.5%
December Fair · 49 7.9°C -3.9°C 4.1 235.6 52.1%
January Fair · 46 2.3°C -9.3°C 5.6 235.6 60.5%
March Fair · 42 8.8°C -4.6°C 8.5 297.6 58.9%
April Fair · 42 14.4°C -0.3°C 9.0 324.0 54.2%
Ratings based on temperature comfort, rainfall, sunshine and humidity for remote workers.

Monthly climate data

Monthly climate data for Boulder
Month High Low Mean Feels high Feels low Precip Rain days Snow Sun Daylight UV Humidity Wind Clouds
Jan 2.3° -9.3° -3.5° -1.8° -13.9° 25.1 mm 5.6 17.3 cm 235.6 hrs 9.7 hrs — 60.5% 15.0 km/h 60.7%
Feb 3.1° -9.9° -3.3° -0.7° -14.8° 38.1 mm 6.8 25.4 cm 249.2 hrs 10.7 hrs — 59.5% 16.6 km/h 56.9%
Mar 8.8° -4.6° 1.8° 5.4° -9.0° 56.0 mm 8.5 29.3 cm 297.6 hrs 12.0 hrs — 58.9% 16.4 km/h 60.7%
Apr 14.4° -0.3° 6.8° 11.6° -4.3° 48.5 mm 9.0 16.4 cm 324.0 hrs 13.3 hrs — 54.2% 18.0 km/h 53.4%
May 19.0° 5.5° 12.2° 17.5° 2.7° 98.7 mm 12.2 6.4 cm 362.7 hrs 14.4 hrs — 60.0% 16.7 km/h 56.2%
Jun 26.4° 12.1° 19.2° 26.1° 10.2° 40.1 mm 6.8 0.1 cm 378.0 hrs 15.0 hrs — 52.5% 15.7 km/h 45.5%
Jul 30.0° 14.8° 22.4° 29.8° 13.7° 25.3 mm 6.0 0.0 cm 406.1 hrs 14.7 hrs — 48.8% 16.4 km/h 40.0%
Aug 28.9° 14.4° 21.4° 28.6° 13.2° 32.1 mm 8.1 0.0 cm 378.2 hrs 13.7 hrs — 51.5% 14.8 km/h 40.5%
Sep 26.0° 10.5° 17.8° 24.2° 8.2° 27.1 mm 5.2 0.0 cm 336.0 hrs 12.4 hrs — 47.4% 15.1 km/h 33.2%
Oct 18.3° 4.3° 10.8° 14.9° 1.2° 19.8 mm 4.1 3.3 cm 303.8 hrs 11.1 hrs — 50.4% 14.5 km/h 37.1%
Nov 10.4° -2.3° 3.6° 6.5° -6.4° 24.5 mm 4.6 13.6 cm 252.0 hrs 10.0 hrs — 53.5% 14.7 km/h 55.5%
Dec 7.9° -3.9° 1.6° 3.7° -8.2° 24.0 mm 4.1 13.0 cm 235.6 hrs 9.4 hrs — 52.1% 17.6 km/h 62.9%
Based on historical averages. Source: Open-Meteo.

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