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Union Gap, WA Weather Forecast
Union Gap, WA Weather Forecast Dated: 643 AM Sat Sep 12 2026
Expect a mild stretch with plenty of sunshine and occasional showers over the coming period. comfortable humidity and no major pressure swings will dominate.
Saturday, September 12, 2026
Mid-Morning
65°F 19°C
Overcast
Mid-Afternoon
76°F 25°C
Overcast
Early-Evening
65°F 18°C
Overcast
Pleasant near 76°F 25°C, overcast throughout the day, with steady humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
53°F 12°C
Light Showers
Mid-Afternoon
54°F 12°C
Light Showers
Early-Evening
58°F 14°C
Overcast
Cool and brisk at 54°F 12°C, showers lingering into the afternoon before clearing, with steady humidity and steady pressure.
Monday, September 14, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
66°F 19°C
Partly Cloudy
Enjoyable around 68°F 20°C, sunny through the afternoon, turning overcast this evening, with lower humidity and steady pressure.
Tuesday, September 15, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
70°F 21°C
Sunny
Mild temperatures up to 71°F 22°C, overcast in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
62°F 16°C
Sunny
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
71°F 22°C
Sunny
Mild with a high of 74°F 23°C, sunny throughout the day, with lower humidity and steady pressure.
Thursday, September 17, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
76°F 24°C
Sunny
Early-Evening
73°F 23°C
Sunny
Pleasant near 76°F 24°C, sunny throughout the day, with steady humidity and steady pressure.
Friday, September 18, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
76°F 25°C
Sunny
Comfortable with temperatures reaching 79°F 26°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Saturday, September 19, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
82°F 28°C
Overcast
Early-Evening
79°F 27°C
Sunny
Quite warm around 82°F 28°C, cloudy in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and barometric pressure falling.
Sunday, September 20, 2026
Mid-Morning
70°F 21°C
Sunny
Mid-Afternoon
85°F 30°C
Sunny
Early-Evening
81°F 27°C
Sunny
Warm temperatures up to 85°F 30°C, sunny throughout the day, with lower humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
68°F 20°C
Overcast
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
81°F 27°C
Sunny
Very warm with a high of 84°F 29°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
82°F 28°C
Sunny
Warm and summery near 86°F 30°C, sunny throughout the day, with steady humidity and steady pressure.
Wednesday, September 23, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
83°F 28°C
Sunny
Balmy with temperatures reaching 86°F 30°C, sunny throughout the day, with lower humidity and barometric pressure falling.
Thursday, September 24, 2026
Mid-Morning
72°F 22°C
Sunny
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
75°F 24°C
Sunny
Quite warm around 88°F 31°C, sunny throughout the day, with steady humidity and steady pressure. Winds turning from the SW to the SE at 8 mph 12 km/h.
Friday, September 25, 2026
Mid-Morning
56°F 13°C
Light Showers
Mid-Afternoon
55°F 13°C
Overcast
Early-Evening
58°F 15°C
Overcast
Cool and brisk at 55°F 13°C, scattered morning showers before drying out later, with increasing humidity and steady pressure.
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