Holly, Colorado Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Holly weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Thunderstorm22%0.08″85°60°—
- FridayJun 5Light Drizzle—0.02″97°63°+12°
- SaturdayJun 6Overcast——94°66°-3°
- SundayJun 7Overcast——99°67°+5°
- MondayJun 8Overcast——103°72°+4°
- TuesdayJun 9Overcast——106°76°+3°
- WednesdayJun 10Overcast——98°76°-8°
Ozone at AQI 45 now. AQI flat over the last 6 hours (within ±3 points). With UV 9.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 58 by mid-afternoon.
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 45 now. With UV 9.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 58 by mid-afternoon.
- Present
- AQI 45
- UV peak
- 9.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 58
PM × Wind × Precip
PM2.5 at 6.0 µg/m³ (AQI 33) with a 0.66 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.66
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:12 AM
- Moonset
- 2:59 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Holly at a glance
- Today vs. normal: 76°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 4, 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.
SPC Convective Outlook
Storm Prediction Center — Holly
SPC has placed Holly in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.