Grants Pass, Oregon Weather
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Climate of Grants Pass: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), August is usually the hottest month in Grants Pass, with average daytime highs around 31°C. December is the coolest, when nights typically fall to about -1°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 32°C, so the seasons feel very different from each other.
The area receives about 1070 mm of rain in a typical year. Most of it falls from November to March (around 73% of the yearly total), and December is the wettest month at roughly 219 mm. The driest stretch is July to August, with under 20 mm a month.
For outdoor plans and travel, May to October usually offer the most comfortable weather in Grants Pass, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 8° | -1° | 153 mm | 91% |
| Feb | 9° | 0° | 122 mm | 87% |
| Mar | 11° | 1° | 141 mm | 85% |
| Apr | 14° | 3° | 89 mm | 82% |
| May | 18° | 6° | 54 mm | 79% |
| Jun | 23° | 9° | 28 mm | 71% |
| Jul | 30° | 12° | 6 mm | 56% |
| Aug | 31° | 12° | 8 mm | 49% |
| Sep | 27° | 9° | 28 mm | 52% |
| Oct | 19° | 5° | 76 mm | 66% |
| Nov | 11° | 2° | 150 mm | 84% |
| Dec | 7° | -1° | 219 mm | 91% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Grants Pass. Values describe typical conditions, not a forecast.
About Grants Pass weather
Grants Pass is set in Oregon's climate divide — mild, wet Pacific coast and Willamette Valley to the west, drier high desert east of the Cascades, about 180 km south of Eugene. Summers bring warm, dry summers (June–September) west of the Cascades. The year winds down with mild, wet winters (November–March) in the west, colder and snowier in the east. This page shows live, auto-refreshing weather for Grants Pass: 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/Los_Angeles.
Frequently asked questions
Grants Pass is about 180 km south of Eugene, in Oregon.
Grants Pass sees mild, wet winters (November–March) in the west, colder and snowier in the east.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Grants Pass's exact coordinates. No fixed schedule, the page updates whenever you load it.
August is usually the hottest month in Grants Pass, with average daytime highs of about 31°C and nights around 12°C.
The coldest nights come in December, when the average low is about -1°C and daytime highs reach around 7°C. Frost is possible on clear, calm nights.
Grants Pass receives about 1070 mm of rain in a typical year. December is the wettest month at roughly 219 mm, and the main rainy period is November to March.
May to October usually offer the most comfortable weather in Grants Pass, with mild daytime temperatures and little rain.
In November Grants Pass typically sees daytime highs near 11°C and lows near 2°C, with about 150 mm of rain over the month and average humidity around 84%. 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.
Live temperature for Grants Pass is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Grants Pass's day-to-day weather follows the broader pattern of Oregon described above. See the hourly weather forecast or the air quality index for more detail.