Ellensburg, Washington Weather
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Climate of Ellensburg: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Ellensburg, with average daytime highs around 27°C. December is the coolest, when nights typically fall to about -6°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 33°C, so the seasons feel very different from each other.
The area receives about 580 mm of rain in a typical year. Rainfall is modest in every month; December is the wettest at about 94 mm. The driest stretch is July to August, with under 20 mm a month.
For outdoor plans and travel, June to September usually offer the most comfortable weather in Ellensburg, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 0° | -6° | 89 mm | 93% |
| Feb | 3° | -5° | 56 mm | 84% |
| Mar | 8° | -3° | 62 mm | 78% |
| Apr | 12° | 0° | 41 mm | 70% |
| May | 18° | 5° | 39 mm | 65% |
| Jun | 22° | 8° | 24 mm | 62% |
| Jul | 27° | 11° | 8 mm | 56% |
| Aug | 27° | 11° | 11 mm | 54% |
| Sep | 21° | 8° | 21 mm | 59% |
| Oct | 13° | 2° | 56 mm | 71% |
| Nov | 5° | -3° | 82 mm | 84% |
| Dec | 0° | -6° | 94 mm | 91% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Ellensburg. Values describe typical conditions, not a forecast.
About Ellensburg weather
Ellensburg, in Washington's stark east–west divide — mild, wet Pacific coast and Puget Sound versus a much drier, more continental interior, is positioned about 146 km east of Tacoma. The warmer months mean mild, dry summers (June–September) west of the Cascades. Finally, there's mild, rainy winters (November–February) in the west, colder with more snow east of the mountains. This page shows live, auto-refreshing weather for Ellensburg: 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
Ellensburg is about 146 km east of Tacoma, in Washington.
Ellensburg sees mild, rainy winters (November–February) in the west, colder with more snow east of the mountains.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Ellensburg's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Ellensburg, with average daytime highs of about 27°C and nights around 11°C.
The coldest nights come in December, when the average low is about -6°C and daytime highs reach around 0°C. Frost is possible on clear, calm nights.
Ellensburg receives about 580 mm of rain in a typical year. December is the wettest month at roughly 94 mm; no month averages more than 100 mm.
June to September usually offer the most comfortable weather in Ellensburg, with mild daytime temperatures and little rain.
In November Ellensburg typically sees daytime highs near 5°C and lows near -3°C, with about 82 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.
The current temperature for Ellensburg 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.
Ellensburg's day-to-day weather follows the broader pattern of Washington described above. See the hourly weather forecast or the air quality index for more detail.