Grand Junction, Colorado Weather
Grand Junction weather this week
Over the next 7 days in Grand Junction, daytime highs range from 11°C to 17°C and night-time lows from 3°C to 8°C. The warmest afternoon is likely on Tuesday at 17°C, while the coolest night is expected tomorrow night at 3°C. Temperatures trend cooler through the week, dropping by about 3°C.
Rain is most likely Tuesday, Wednesday and Friday, with roughly 2.6 mm forecast in total over the week.
It turns breezy on Tuesday, with winds reaching about 45 km/h — secure loose objects on rooftops and balconies. UV levels stay moderate or lower, peaking at 4. Average humidity is a comfortable 53% or so.
| Day | Conditions | High / Low | Rain chance | Rain | Max wind |
|---|---|---|---|---|---|
| Today (Sunday) | Overcast | 14° / 3° | 1% | 0.0 mm | 9 km/h |
| Tomorrow (Monday) | Overcast | 14° / 3° | 1% | 0.0 mm | 10 km/h |
| Tuesday | Light drizzle | 17° / 8° | 74% | 1.6 mm | 45 km/h |
| Wednesday | Light drizzle | 11° / 4° | 53% | 0.1 mm | 14 km/h |
| Thursday | Overcast | 15° / 5° | 26% | 0.0 mm | 20 km/h |
| Friday | Light drizzle | 11° / 5° | 73% | 0.9 mm | 38 km/h |
| Saturday | Overcast | 11° / 3° | 32% | 0.0 mm | 16 km/h |
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Today's outlook for Grand Junction
At 01:00 local time it is 6°C in Grand Junction under partly cloudy skies, feeling like 4°C. Today's forecast high is 14°C and the low is 3°C, and the day overall looks overcast. Rain is unlikely today (1% chance). Winds are blowing at about 7 km/h from the west. Humidity is 82%.
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Climate of Grand Junction: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Grand Junction, with average daytime highs around 33°C. January is the coolest, when nights typically fall to about -8°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 41°C, so the seasons feel very different from each other.
The area receives about 380 mm of rain in a typical year. Rainfall is modest in every month; September is the wettest at about 40 mm.
For outdoor plans and travel, May to June and August to September usually offer the most comfortable weather in Grand Junction, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 3° | -8° | 29 mm | 70% |
| Feb | 5° | -6° | 29 mm | 65% |
| Mar | 11° | -3° | 32 mm | 56% |
| Apr | 16° | 1° | 33 mm | 49% |
| May | 22° | 6° | 31 mm | 43% |
| Jun | 30° | 12° | 15 mm | 31% |
| Jul | 33° | 17° | 33 mm | 36% |
| Aug | 30° | 15° | 34 mm | 40% |
| Sep | 25° | 10° | 40 mm | 41% |
| Oct | 17° | 2° | 38 mm | 49% |
| Nov | 9° | -3° | 28 mm | 57% |
| Dec | 2° | -8° | 35 mm | 69% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Grand Junction. Values describe typical conditions, not a forecast.
About Grand Junction weather
Grand Junction, in Colorado's high-altitude climate, ranging from semi-arid plains to alpine mountains, is positioned about 315 km west of Denver. The warmer months mean warm days and cool nights (June–August), especially at altitude. Finally, there's cold, snowy winters in the mountains, milder on the eastern plains. This page shows live, auto-refreshing weather for Grand Junction: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Denver.
Frequently asked questions
Grand Junction is about 315 km west of Denver, in Colorado.
Grand Junction sees cold, snowy winters in the mountains, milder on the eastern plains.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Grand Junction's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Grand Junction, with average daytime highs of about 33°C and nights around 17°C.
The coldest nights come in January, when the average low is about -8°C and daytime highs reach around 3°C. Frost is possible on clear, calm nights.
Grand Junction receives about 380 mm of rain in a typical year. September is the wettest month at roughly 40 mm; no month averages more than 100 mm.
May to June and August to September usually offer the most comfortable weather in Grand Junction, with mild daytime temperatures and little rain.
In November Grand Junction typically sees daytime highs near 9°C and lows near -3°C, with about 28 mm of rain over the month and average humidity around 57%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for Grand Junction updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Grand Junction's day-to-day weather follows the broader pattern of Colorado described above. See the hourly weather forecast or the air quality index for more detail.