Grand Junction, Colorado Weather
Monsoon storms drench the south. Day 14 of summer. Read this microseason across nine climate regions →
Grand Junction weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Clear——96°59°—
- SundayJul 5Mostly Clear——99°66°+3°
- MondayJul 6Overcast——99°69°0°
- TuesdayJul 7Light Drizzle——101°71°+2°
- WednesdayJul 8Light Drizzle——102°73°+1°
- ThursdayJul 9Mostly Clear——104°74°+2°
- FridayJul 10Mostly Clear——105°73°+1°
AQI 45 (Good), driven by Ozone. AQI down 13 over the last 6 hours (gradual decline). Ozone at AQI 68 now. With UV 7.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 65 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 68 now. With UV 7.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 65 around 1 PM.
- Present
- AQI 68
- UV peak
- 7.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 65
PM × Wind × Precip
PM2.5 at 7.7 µg/m³ (AQI 43), ratio 0.50 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.50
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 11:08 PM
- Moonset
- 10:24 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Grand Junction at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 81501, 81503, 81504, 81505, 81506, 81507
16-Day Forecast — Grand Junction
- Sat96°59°0%
- Sun99°66°1%
- Mon99°69°6%
- Tue101°71°7%
- Wed102°73°4%
- Thu104°74°4%
- Fri105°73°1%
- Sat109°75°1%
- Sun108°76°5%
- Mon103°72°10%
- Tue104°74°12%
- Wed105°75°17%
- Thu104°74°41%
- Fri105°75°45%
- Sat100°76°31%
- Sun103°73°32%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Grand Junction
Right now in the garden
Peak growing season
As of July 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 — Grand Junction
SPC includes Grand Junction in the general thunderstorm area day after tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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 Grand Junction
- 81503
- 81506
- 81507
- 81505
- 81504
- 81501
- 81502