Portland, Colorado Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Portland weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——84°60°—
- MondayJul 6Rain36%0.17″80°57°-4°
- TuesdayJul 7Light Drizzle53%—81°60°+1°
- WednesdayJul 8Overcast12%—88°61°+7°
- ThursdayJul 9Overcast10%—86°60°-2°
- FridayJul 10Overcast——84°60°-2°
- SaturdayJul 11Partly Cloudy11%—91°62°+7°
AQI 159 (Unhealthy), driven by PM2.5. AQI down 6 over the last 6 hours (gradual decline). PM2.5 at 86.4 µg/m³, PM10 at 88.2 µg/m³ — typical background levels with no transport signature.
LIMIT OUTDOORS Limit prolonged outdoor exertion. Sensitive groups should avoid outdoor exertion. Consider rescheduling outdoor activities until AQI improves.
What's driving it
Ozone × UV × Sky
Ozone at AQI 37 now. With UV 3.3 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12 around 1 PM.
- Present
- AQI 37
- UV peak
- 3.3 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 86.4 µg/m³, PM10 at 88.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.98
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 11:29 PM
- Moonset
- 11:26 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Portland at a glance
- Today vs. normal: 12°F below the seasonal normal for this latitude
- Last frost: April 5 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — Portland
- Sun85°59°0%
- Mon80°57°36%
- Tue81°60°53%
- Wed88°61°12%
- Thu86°60°10%
- Fri84°60°4%
- Sat91°62°11%
- Sun93°60°18%
- Mon95°62°30%
- Tue97°59°34%
- Wed96°60°34%
- Thu90°61°49%
- Fri93°60°62%
- Sat93°60°65%
- Sun92°60°65%
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 — Portland
SPC includes Portland 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 Portland
- 81432