Eureka Weather Forecast

    • 54
    • 61

    Cloudy

    • 54
    • 62

    Cloudy

    • 53
    • 63

    Mostly Cloudy

    • 53
    • 64

    Mostly Cloudy

    • 53
    • 62

    Mostly Cloudy

    • 52
    • 61

    Mostly Cloudy

Today 20 Sep Northern Coastal Humboldt

Mostly cloudy. Patchy fog in the morning. Highs 60 to 71. Northwest wind around 10 Mph.

Tonight 20 Sep Northern Coastal Humboldt

Cloudy. Patchy fog. Lows 47 to 57. Northwest wind around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Eureka Temperature Statistics

September Temperature

Arcata / Eureka, Arcata Airport (11.8 miles)

  • Lowest 5 September, 2026

    46.7 °F

  • Average September

    58.7 °F

  • Highest 9 September, 2026

    75.7 °F

Climate (2021–2026)

Arcata / Eureka, Arcata Airport (11.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    59.8 °F
Get WillyWeather+ to remove ads