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Whatcom County (North Cascades National Park)
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United States weather

Weather in Whatcom County, Washington for October 2026

Your guide to Whatcom County weather in October - trends and predictions

    Snow Forecast ❄️

  • With an average of 4 snowy days, Whatcom County usually enjoys a light touch of snow in October.
    According to Whatcom County snow forecast for October 2026, no snow is expected in the next 2 weeks.

    • Temperatures

  • The forecast for the next days in Whatcom County predicts temperatures to be around 13 °F, close to the historical average.

  • In general, the average temperature in Whatcom County at the beginning of October is 17.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 2.6 °F by the end of October.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
15
Dry days
Average rainy days
12
Rainy days
Average snowy days
4
Snow days
Average temperatures
6°/1°
Temperatures
Average wind speed
8 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Whatcom County Weather October

Move between months or click on a day
September
November
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain
13°
2
Patchy rain possible
20°
3
Sunny
20°
4
Sunny
21°
5
Overcast
17°
6
Overcast
16°
7
Overcast
17°
8
Sunny
20°
9
Partly cloudy
15°
10
Patchy rain possible
9°
11
Sunny
11°
12
Patchy rain possible
4°
13
Freezing fog
4°
14
Light drizzle
1°
15
Sunny
7°
16
Overcast
11°
17
Light rain
2°
18
Moderate rain at times
3°
19
Moderate or heavy rain with thunder
2°
20
Fog
1°
21
Fog
7°
22
Overcast
9°
23
Fog
4°
24
Moderate or heavy rain shower
4°
25
Patchy moderate snow
1°
26
Moderate rain
0°
27
Heavy snow
0°
28
Patchy moderate snow
0°
29
Moderate rain
0°
30
Overcast
5°
31
Heavy rain at times
12°

Temperatures trend during October in Whatcom County

See the weather trend as well as the moving average line

October weather in Whatcom County day by day

Click on a date for more information
September November
Date Weather Temperatures Rain Snow More
Oct. 1 Light rain
Light rain
 13° /7° 2.9 mm 0 cm
Oct. 2 Patchy rain possible
Patchy rain possible
 20° /12° 1 mm 0 cm
Oct. 3 Sunny
Sunny
 20° /6° 0 mm 0 cm
Oct. 4 Sunny
Sunny
 21° /7° 0 mm 0 cm
Oct. 5 Overcast
Overcast
 17° /6° 0.1 mm 0 cm
Oct. 6 Overcast
Overcast
 16° /5° 0 mm 0 cm
Oct. 7 Overcast
Overcast
 17° /4° 0 mm 0 cm
Oct. 8 Sunny
Sunny
 20° /7° 0 mm 0 cm
Oct. 9 Partly cloudy
Partly cloudy
 15° /6° 0 mm 0 cm
Oct. 10 Patchy rain possible
Patchy rain possible
 9° /0° 1.4 mm 0 cm
Oct. 11 Sunny
Sunny
 11° /-2° 2.3 mm 0 cm
Oct. 12 Patchy rain possible
Patchy rain possible
 4° /-3° 7.4 mm 0 cm
Oct. 13 Freezing fog
Freezing fog
 4° /-5° 9.7 mm 0 cm
Oct. 14 Light drizzle
Light drizzle
 1° /-5° 11 mm 0 cm
Oct. 15 Sunny
Sunny
 7° /-5° 0 mm 0 cm
Oct. 16 Overcast
Overcast
 11° /0° 0 mm 0 cm
Oct. 17 Light rain
Light rain
 2° /1° 3.2 mm 0 cm
Oct. 18 Moderate rain at times
Moderate rain at times
 3° /-2° 36.7 mm 0 cm
Oct. 19 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 2° /1° 106.4 mm 0 cm
Oct. 20 Fog
Fog
 1° /0° 2.4 mm 0 cm
Oct. 21 Fog
Fog
 7° /1° 0 mm 0 cm
Oct. 22 Overcast
Overcast
 9° /0° 2 mm 0 cm
Oct. 23 Fog
Fog
 4° /2° 2.3 mm 0 cm
Oct. 24 Moderate or heavy rain shower
Moderate or heavy rain shower
 4° /3° 75 mm 0 cm
Oct. 25 Patchy moderate snow
Patchy moderate snow
 1° /-1° 27.7 mm 1.1 cm
Oct. 26 Moderate rain
Moderate rain
 0° /-1° 51.9 mm 0 cm
Oct. 27 Heavy snow
Heavy snow
 0° /-2° 27.5 mm 10.6 cm
Oct. 28 Patchy moderate snow
Patchy moderate snow
 0° /-5° 11.6 mm 1 cm
Oct. 29 Moderate rain
Moderate rain
 0° /-1° 44.4 mm 7.9 cm
Oct. 30 Overcast
Overcast
 5° /-1° 0 mm 0 cm
Oct. 31 Heavy rain at times
Heavy rain at times
 12° /8° 12.2 mm 0 cm
Next
Important Notice
Our weather forecast for Whatcom County in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Whatcom County forecast closer to your planned date for the most up-to-date weather information.
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Whatcom County in October - FAQ

What are the expected maximum and minimum temperatures in Whatcom County during October?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 1°.

How much rainfall should be expected in Whatcom County during October?
Significant rainfall exceeding 460 mm is expected in Whatcom County during October, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Whatcom County in October 2026?
Whatcom County experiences an average snowfall of 20.6 cm during October, occurring over 4 days.

What are the typical wind conditions in Whatcom County during October?
The average wind speed in Whatcom County during October is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

Whatcom County snow forecast October 2026

Track daily snowfall levels and discover Whatcom County’s snowy potential this October ❄️
On average, Whatcom County sees 4 snowy days during October, with approximately 20.6 cm of total snowfall.

October rainfall patterns in Whatcom County

Explore the daily rainfall trends and prepare for Whatcom Countys October weather 💧
Typically, Whatcom County has 12 rainy days in October with a total of 460 mm of rainfall.

UV exposure in Whatcom County during October

Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
Top locations in Whatcom County
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North Cascades National Park
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Location coordinates Where is Whatcom County?

Get accurate weather forecasts for Whatcom County, located at latitude 48.833 and longitude -121.347. Stay updated with localized weather information tailored for Whatcom County.

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