Union Gap Weather Forecast
Weather forecast for: Union Gap WA
Last Update: 4:01 am PDT Sep 14, 2026
Today: Sunny, with a high near 69. West wind around 5 mph becoming calm.
Tonight: Increasing clouds, with a low around 47. Light and variable wind.
Tuesday: Mostly cloudy, with a high near 67. Calm wind becoming northeast around 5 mph in the afternoon.
Tuesday Night: Partly cloudy, with a low around 47. Northeast wind around 5 mph becoming calm.
Wednesday: Sunny, with a high near 74. North wind 5 to 7 mph.
Wednesday Night: Clear, with a low around 48.
Thursday: Sunny, with a high near 78.
Thursday Night: Mostly clear, with a low around 51.
Friday: Sunny, with a high near 79.
Friday Night: Mostly clear, with a low around 51.
Saturday: Sunny, with a high near 80.
Saturday Night: Mostly clear, with a low around 50.
Sunday: Sunny, with a high near 79.