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Plain, WA Weather Forecast
Plain, WA Weather Forecast Dated: 515 PM Wed Sep 02 2026 (Plain Time)
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Wednesday, September 2, 2026
Mid-Morning
63°F 17°C
Scattered Showers
Mid-Afternoon
65°F 18°C
Light Rain
Early-Evening
61°F 16°C
Light Rain
Refreshing around 65°F 18°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.
Thursday, September 3, 2026
Mid-Morning
43°F 6°C
Sunny
Mid-Afternoon
52°F 11°C
Nearby Thunderstorms
Early-Evening
48°F 9°C
Light Showers
Cool and brisk at 52°F 11°C, locally heavy thunderstorms at times, with increasing humidity and steady pressure.
Friday, September 4, 2026
Mid-Morning
41°F 5°C
Light Showers
Mid-Afternoon
42°F 6°C
Light Showers
Early-Evening
46°F 8°C
Scattered Showers
Cold with a high near 42°F 6°C, locally heavy downpours at times, with steady humidity and barometric pressure rising.
Saturday, September 5, 2026
Mid-Morning
44°F 7°C
Scattered Showers
Mid-Afternoon
53°F 11°C
Nearby Thunderstorms
Early-Evening
50°F 10°C
Cloudy
Crisp with a high near 53°F 11°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.
Sunday, September 6, 2026
Mid-Morning
48°F 9°C
Cloudy
Mid-Afternoon
61°F 16°C
Partly Cloudy
Early-Evening
56°F 14°C
Cloudy
Refreshing around 61°F 16°C, cloudy throughout the day, with steady humidity and steady pressure.
Monday, September 7, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
67°F 20°C
Cloudy
Early-Evening
61°F 16°C
Overcast
Mildly cool near 67°F 20°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure.
Tuesday, September 8, 2026
Mid-Morning
58°F 14°C
Overcast
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
64°F 18°C
Overcast
Comfortable with temperatures reaching 70°F 21°C, overcast throughout the day, with steady humidity and steady pressure.
Wednesday, September 9, 2026
Mid-Morning
60°F 16°C
Sunny
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
67°F 20°C
Sunny
Enjoyable around 73°F 23°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Thursday, September 10, 2026
Mid-Morning
62°F 17°C
Overcast
Mid-Afternoon
62°F 17°C
Partly Cloudy
Early-Evening
53°F 12°C
Scattered Showers
Refreshing around 62°F 17°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds out of the WNW at 11 mph 17 km/h.
Friday, September 11, 2026
Mid-Morning
43°F 6°C
Sunny
Mid-Afternoon
50°F 10°C
Overcast
Early-Evening
46°F 8°C
Sunny
Cool and brisk at 50°F 10°C, cloudy throughout the day, with steady humidity and steady pressure. Winds blowing from the WNW at 11 mph 18 km/h.
Saturday, September 12, 2026
Mid-Morning
42°F 6°C
Overcast
Mid-Afternoon
50°F 10°C
Overcast
Early-Evening
47°F 8°C
Partly Cloudy
Chilly near 50°F 10°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds WNW at 10 mph 17 km/h.
Sunday, September 13, 2026
Mid-Morning
43°F 6°C
Sunny
Mid-Afternoon
58°F 14°C
Sunny
Early-Evening
54°F 12°C
Sunny
Cool with a high near 58°F 14°C, sunny throughout the day, with steady humidity and steady pressure. Winds out of the WNW at 9 mph 14 km/h.
Monday, September 14, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
63°F 18°C
Sunny
Enjoyable around 68°F 20°C, sunny throughout the day, with steady humidity and steady pressure.
Tuesday, September 15, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
68°F 20°C
Sunny
Mild temperatures up to 74°F 23°C, sunny throughout the day, with steady humidity and steady pressure.
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