Bellingham, Washington Weather
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Climate of Bellingham: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Bellingham, with average daytime highs around 23°C. December is the coolest, when nights typically fall to about 0°C and frost is possible on the coldest nights.
The area receives about 1400 mm of rain in a typical year. Most of it falls from October to March (around 74% of the yearly total), and November is the wettest month at roughly 222 mm.
For outdoor plans and travel, June to September usually offer the most comfortable weather in Bellingham, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 5° | 0° | 207 mm | 91% |
| Feb | 6° | 0° | 114 mm | 87% |
| Mar | 9° | 2° | 157 mm | 85% |
| Apr | 13° | 4° | 97 mm | 81% |
| May | 17° | 8° | 71 mm | 78% |
| Jun | 19° | 11° | 56 mm | 79% |
| Jul | 23° | 13° | 29 mm | 77% |
| Aug | 23° | 13° | 36 mm | 77% |
| Sep | 19° | 11° | 77 mm | 80% |
| Oct | 14° | 6° | 153 mm | 85% |
| Nov | 8° | 3° | 222 mm | 90% |
| Dec | 5° | 0° | 184 mm | 91% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Bellingham. Values describe typical conditions, not a forecast.
About Bellingham weather
Bellingham lies in Washington's stark east–west divide — mild, wet Pacific coast and Puget Sound versus a much drier, more continental interior — about 129 km north of Seattle. Expect mild, dry summers (June–September) west of the Cascades. Winter brings mild, rainy winters (November–February) in the west, colder with more snow east of the mountains. This page shows live, auto-refreshing weather for Bellingham: 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
Bellingham is about 129 km north of Seattle, in Washington.
Bellingham 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 Bellingham's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Bellingham, with average daytime highs of about 23°C and nights around 13°C.
The coldest nights come in December, when the average low is about 0°C and daytime highs reach around 5°C. Frost is possible on clear, calm nights.
Bellingham receives about 1400 mm of rain in a typical year. November is the wettest month at roughly 222 mm, and the main rainy period is October to March.
June to September usually offer the most comfortable weather in Bellingham, with mild daytime temperatures and little rain.
In November Bellingham typically sees daytime highs near 8°C and lows near 3°C, with about 222 mm of rain over the month and average humidity around 90%. 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 Bellingham 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.
Bellingham'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.