Riley Lake Weather Forecast

    • 61
    • 99

    Hot

    • 63
    • 101

    Hot

    • 57
    • 87

    Slight Chance Rain

    • 54
    • 84

    Partly Sunny

    • 53
    • 80

    Mostly Cloudy

    • 53
    • 82

    Mostly Cloudy

Today 21 Jul Foothills and Valleys of the North Cascades

Mostly sunny. Patchy smoke. Highs in the upper 80s to mid 90s. Light wind.

Tonight 21 Jul Foothills and Valleys of the North Cascades

Partly cloudy. Lows in the upper 50s to mid 60s. Light wind.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Riley Lake Temperature Statistics

July Temperature

Arlington Municipal Airport (11.2 miles)

  • Lowest 13 July, 2026

    44.6 °F

  • Average July

    62.1 °F

  • Highest 6 July, 2026

    81 °F

Climate (2021–2026)

Arlington Municipal Airport (11.2 miles)

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

  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
Get WillyWeather+ to remove ads