Boulder, Utah Weather
Heat hardens the dust. Day 76 of spring. Read this microseason across nine climate regions →
Boulder weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——81°59°—
- ThursdayJun 4Overcast——85°63°+4°
- FridayJun 5Overcast——86°61°+1°
- SaturdayJun 6Overcast——82°63°-4°
- SundayJun 7Overcast——78°57°-4°
- MondayJun 8Clear——77°54°-1°
- TuesdayJun 9Partly Cloudy——80°54°+3°
Ozone at AQI 83 — peak already passed at 1 PM under partly cloudy skies. AQI up 36 in the last 6 hours — air quality is degrading. Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 83 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 83
- UV peak
- 2.5 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 83
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 5:12 AM
- Moonset
- 2:35 PM
- In sign
- ♑︎ Capricorn
Heat hardens the dust
Boulder at a glance
- Today vs. normal: 79°F — typical for the season
- Last frost: April 4 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.