Altona, Colorado Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Altona weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——90°57°—
- MondayJul 6Overcast——94°62°+4°
- TuesdayJul 7Overcast64%—93°65°-1°
- WednesdayJul 8Light Drizzle67%0.01″94°60°+1°
- ThursdayJul 9Light Drizzle45%0.01″95°61°+1°
- FridayJul 10Overcast22%—92°61°-3°
- SaturdayJul 11Mostly Clear——96°61°+4°
AQI 40 (Good), driven by PM2.5. AQI down 54 over the last 6 hours — air quality is improving sharply. PM2.5 at 8.5 µg/m³ (AQI 47) with a 0.93 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 8.5 µg/m³ (AQI 47) with a 0.93 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- Wind
- calm
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:20 PM
- Moonset
- 11:16 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Altona at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: April 17 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — Altona
- Sun90°57°2%
- Mon94°62°8%
- Tue93°65°64%
- Wed94°60°67%
- Thu95°61°45%
- Fri92°61°22%
- Sat96°61°4%
- Sun99°64°3%
- Mon105°65°10%
- Tue97°69°25%
- Wed100°67°29%
- Thu101°63°55%
- Fri98°64°52%
- Sat102°64°59%
- Sun91°66°72%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Altona
SPC includes Altona in the general thunderstorm area today — no severe risk, but storms are possible.
- 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.
ZIP codes in Altona
- 80302