Issaquah Weather Forecast

    • 46
    • 62

    Rain Likely

    • 43
    • 54

    Rain Likely

    • 38
    • 51

    Rain

    • 36
    • 52

    Rain Showers

    • 39
    • 56

    Slight Chance Rain

    • 39
    • 57

    Mostly Cloudy

    • 45
    • 62

    Chance Rain

Today 12 Apr Eastside

Mostly cloudy until late afternoon then becoming mostly sunny. Patchy fog in the morning. Highs in the lower 60s. Light wind.

Tonight 12 Apr Eastside

Partly cloudy in the evening then becoming cloudy. A slight chance of Showers in the Evening, then a chance of Showers late in the evening. Showers likely after midnight. Rainfall Amounts a tenth to a quarter of an inch possible. Lows in the mid to upper 40s. Light wind becoming south to 10 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Issaquah Temperature Statistics

April Temperature

Renton Municipal Airport (8.7 miles)

  • Lowest 8 April, 2026

    36 °F

  • Average April

    51.7 °F

  • Highest 6 April, 2026

    73.9 °F

Climate (2021–Present)

Renton Municipal Airport (8.7 miles)

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

  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.4 °F
Get WillyWeather+ to remove ads