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Eureka, CA Weather Tomorrow

Tomorrow's forecast for Eureka includes an extended 5 day weather outlook with precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Eureka area and around Humboldt county, California.
Updated: Thu Sep 17th 2026 12:45 AM PDT
Eureka, CA Weather – 9-17 – Sunny
61° / 55°
Sunny
Eureka is set for a sunny day with temperatures peaking at 61°F and dipping to 55°F. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 15mph on average and gusts of 21mph at 12 PM. High humidity with average of 87% is anticipated, the maximum being 98% at 8 PM and 73% being its lowest at 10 AM. Barometric pressure is its highest of 30.13inHg at 9 PM, a lowest point of 29.93inHg at 2 AM with an avg 30.05inHg.
Eureka, CA Weather – 9-18 – Sunny
60° / 55°

Weather Tomorrow

Sunny
It will be sunny in Eureka, with a high of 60°F and a low of 55°F. There might be light rainfall having a 18% chance with an estimated 0in. Wind will be moderate, blowing around 11mph on average and gusts of 15.5mph at 4 PM. High humidity with average of 90% is anticipated, the maximum being 94% at 12 AM and 84% being its lowest at 3 PM. Barometric pressure is its highest of 30.17inHg at 11 AM, a lowest point of 30.1inHg at 11 PM with an avg 30.14inHg.
Eureka, CA Weather – 9-19 – Overcast
60° / 53°
Overcast
Eureka may see overcast, with daytime highs of 60°F and overnight lows near 53°F. There might be light rainfall having a 25% chance with an estimated 0in. Winds will be light at 8mph and gusts of 17mph at 12 PM. High humidity with average of 88% is anticipated, the maximum being 95% at 11 PM and 76% being its lowest at 2 PM. Barometric pressure is its highest of 30.09inHg at 12 AM, a lowest point of 29.97inHg at 11 PM with an avg 30.01inHg.
Eureka, CA Weather – 9-20 – Scattered Showers
59° / 54°
Scattered Showers
Daytime highs will reach 59°F with lows dropping to 54°F in Eureka, where showers likely at times. Rainfall predicted to have a 60% chance with an estimated 0.02in. Wind will be moderate, blowing around 13mph on average and gusts of 17.5mph at 5 PM. High humidity with average of 88% is anticipated, the maximum being 95% at 12 AM and 81% being its lowest at 11 AM. Barometric pressure is its highest of 30inHg at 8 PM, a lowest point of 29.94inHg at 5 AM with an avg 29.97inHg.
Eureka, CA Weather – 9-21 – Sunny
60° / 55°
Sunny
Bright and sunny conditions in Eureka, with a high of 60°F and a low of 55°F. There might be light rainfall having a 19% chance with an estimated 0in. Wind will be moderate, blowing around 16mph on average and gusts of 28.7mph at 8 PM. High humidity with average of 86% is anticipated, the maximum being 94% at 5 AM and 79% being its lowest at 3 PM. Barometric pressure is its highest of 29.99inHg at 8 AM, a lowest point of 29.91inHg at 4 AM with an avg 29.96inHg.
Eureka, CA Weather – 9-22 – Sunny
61° / 55°
Sunny
Bright and sunny conditions in Eureka, with a high of 61°F and a low of 55°F. There's a very small chance of rainfall, only about 9%. Wind will be moderate, blowing around 14mph on average and gusts of 25.5mph at 2 PM. The humidity will be on the higher side, averaging about 79%, the maximum being 92% at 2 AM and 64% being its lowest at 2 PM. Barometric pressure is its highest of 29.97inHg at 11 AM, a lowest point of 29.89inHg at 11 PM with an avg 29.94inHg.

Currently

Clear 56°F
29.92 inHg.
Barometer
90%
Humidity
S 13.3 mph
Wind
Clear

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