Lummi Island, WA Weather Tomorrow

For a complete weather outlook, review tomorrow's Lummi Island forecast and the following 5 days with daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details for the Lummi Island area and around Whatcom county, Washington.
Updated: Fri Oct 2nd 2026 10:30 AM PDT
Lummi Island, WA Weather – 10-2 – Scattered Showers
63° / 55°
Scattered Showers
Daytime highs will reach 63°F with lows dropping to 55°F in Lummi Island, where showers likely at times. Rainfall predicted to have a 58% chance with an estimated 0.02in. Winds will be light at 5mph and gusts of 15mph at 9 PM. High humidity with average of 86% is anticipated, the maximum being 96% at 10 PM and 78% being its lowest at 3 PM. Barometric pressure is its highest of 30.12inHg at 11 PM, a lowest point of 30.04inHg at 11 AM with an avg 30.07inHg.
Lummi Island, WA Weather – 10-3 – Sunny
62° / 53°

Weather Tomorrow

Sunny
In Lummi Island, bright and sunny conditions with highs near 62°F and lows around 53°F. There might be light rainfall having a 18% chance with an estimated 0in. Winds will be light at 6mph and gusts of 8.1mph at 5 PM. High humidity with average of 87% is anticipated, the maximum being 97% at 2 AM and 69% being its lowest at 1 PM. Barometric pressure is its highest of 30.12inHg at 2 AM, a lowest point of 30.01inHg at 6 PM with an avg 30.07inHg.
Lummi Island, WA Weather – 10-4 – Sunny
64° / 53°
Sunny
A sunny day is in the forecast for Lummi Island, with a high of 64°F and a low of 53°F. There might be light rainfall having a 12% chance. Winds will be light at 6mph and gusts of 16.3mph at 1 PM. High humidity with average of 82% is anticipated, the maximum being 92% at 3 AM and 62% being its lowest at 12 PM. Barometric pressure is its highest of 30.03inHg at 4 AM, a lowest point of 29.96inHg at 6 PM with an avg 30inHg.
Lummi Island, WA Weather – 10-5 – Overcast
61° / 53°
Overcast
Skies will be overcast in Lummi Island, with a high of 61°F and a low of 53°F. There might be light rainfall having a 18% chance. Wind will be moderate, blowing around 11mph on average and gusts of 17.9mph at 9 PM. High humidity with average of 83% is anticipated, the maximum being 91% at 12 AM and 70% being its lowest at 10 AM. Barometric pressure is its highest of 30.04inHg at 11 PM, a lowest point of 29.97inHg at 3 AM with an avg 30.01inHg.
Lummi Island, WA Weather – 10-6 – Overcast
58° / 50°
Overcast
Lummi Island could see cloud-filled skies with daytime highs of 58°F and nighttime lows near 50°F. There might be light rainfall having a 20% chance. Wind will be moderate, blowing around 11mph on average and gusts of 18.6mph at 1 AM. High humidity with average of 84% is anticipated, the maximum being 94% at 7 AM and 71% being its lowest at 1 PM. Barometric pressure is its highest of 30.14inHg at 12 PM, a lowest point of 30.04inHg at 12 AM with an avg 30.1inHg.
Lummi Island, WA Weather – 10-7 – Overcast
60° / 50°
Overcast
Daytime highs will reach 60°F with lows dropping to 50°F in Lummi Island, where skies will be overcast. There might be light rainfall having a 22% chance. Winds will be light at 6mph and gusts of 16.6mph at 2 PM. High humidity with average of 81% is anticipated, the maximum being 90% at 11 PM and 66% being its lowest at 2 PM. Barometric pressure is its highest of 30.16inHg at 11 AM, a lowest point of 30.07inHg at 10 PM with an avg 30.11inHg.

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