Whatcom County, WA Weather Forecast
County weather hub
Slight Chance Light Rain
Compare major city weather across Whatcom County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of rain after 5pm. Mostly cloudy. High near 50, with temperatures falling to around 48 in the afternoon. Southwest wind around 2 mph. Chance of precipitation is 20%.
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
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 2:12 PM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Whatcom County
Friday looks like the warmest upcoming period in Whatcom County at 66 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Friday Night at about 1 to 13 mph S.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 2:12 PM PDT
- Coverage
- 8 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
Rain likely. Cloudy. Low around 45, with temperatures rising to around 47 overnight. South southwest wind 1 to 6 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain before 10am. Mostly cloudy, with a high near 54. Southwest wind 0 to 3 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Partly cloudy, with a low around 46. East northeast wind 1 to 8 mph.
Mostly sunny, with a high near 64. East southeast wind 0 to 9 mph.
Mostly clear, with a low around 52.
Mostly sunny, with a high near 66.
Rain likely after 11pm. Mostly cloudy, with a low around 47.
Rain likely before 5pm. Partly sunny, with a high near 49.
Partly cloudy, with a low around 36.
A slight chance of rain after 5pm. Partly sunny, with a high near 51.
Rain likely. Mostly cloudy, with a low around 40.
Rain likely. Cloudy, with a high near 46.
Rain likely. Mostly cloudy, with a low around 39.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 13
|
Slight Chance Light Rain
|
50°F |
2 mph
SW
|
|
Tonight
Oct 13
|
Light Rain Likely
|
45°F |
1 to 6 mph
SSW
|
|
Wednesday
Oct 14
|
Chance Light Rain then Mostly Cloudy
|
54°F |
0 to 3 mph
SW
|
|
Wednesday Night
Oct 14
|
Partly Cloudy
|
46°F |
1 to 8 mph
ENE
|
|
Thursday
Oct 15
|
Mostly Sunny
|
64°F |
0 to 9 mph
ESE
|
|
Thursday Night
Oct 15
|
Mostly Clear
|
52°F |
0 to 12 mph
ESE
|
|
Friday
Oct 16
|
Mostly Sunny
|
66°F |
1 to 9 mph
S
|
|
Friday Night
Oct 16
|
Rain Likely
|
47°F |
1 to 13 mph
S
|
|
Saturday
Oct 17
|
Rain Likely
|
49°F |
2 to 13 mph
WSW
|
|
Saturday Night
Oct 17
|
Partly Cloudy
|
36°F |
3 mph
SE
|
|
Sunday
Oct 18
|
Partly Sunny then Slight Chance Light Rain
|
51°F |
3 mph
SSE
|
|
Sunday Night
Oct 18
|
Rain Likely
|
40°F |
1 to 8 mph
SSE
|
|
Monday
Oct 19
|
Rain Likely
|
46°F |
1 to 7 mph
SSE
|
|
Monday Night
Oct 19
|
Light Rain Likely
|
39°F |
3 mph
SE
|
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.
