Whatcom County, WA Weather Forecast
County weather hub
Sunny
Compare major city weather across Whatcom County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 73.
County Weather Overview
This county weather page brings together forecast coverage for Whatcom County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 7 of 7 mapped cities in Whatcom County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 14 to Jul 17, 2026
- Latest sync
- Jul 10, 2026 8:15 PM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Whatcom County
Tuesday looks like the warmest upcoming period in Whatcom County at 73 degrees F.
Thursday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Tuesday at about 1 to 9 mph WNW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 10, 2026 8:15 PM PDT
- Coverage
- 4 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KATX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 56.
Sunny, with a high near 73.
A chance of rain after 5am. Partly cloudy, with a low around 57.
A chance of rain. Partly sunny, with a high near 73.
A chance of rain. Partly cloudy, with a low around 55.
A slight chance of rain before 11am. Mostly sunny, with a high near 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
73°F |
1 to 9 mph
WNW
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
56°F |
2 to 8 mph
SW
|
|
Wednesday
Jul 15
|
Sunny
|
73°F |
2 to 8 mph
W
|
|
Wednesday Night
Jul 15
|
Partly Cloudy then Chance Light Rain
|
57°F |
3 to 8 mph
NNE
|
|
Thursday
Jul 16
|
Chance Light Rain
|
73°F |
2 to 9 mph
WNW
|
|
Thursday Night
Jul 16
|
Chance Light Rain
|
55°F |
3 to 9 mph
ESE
|
|
Friday
Jul 17
|
Slight Chance Light Rain then Mostly Sunny
|
70°F |
2 to 9 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across Whatcom County.
Coverage
Forecast coverage currently spans 7 of 7 mapped cities in Whatcom County.
Largest mapped city population in this region: 93,955.
