Union, ON 14 Day Weather - WeatherWorld.com
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Union, ON Weather Forecast


Union, ON Weather Forecast Dated: 245 AM Fri Sep 18 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.
Friday, September 18, 2026
Mid-Morning
15°C 60°F
Cloudy
Mid-Afternoon
20°C 68°F
Overcast
Early-Evening
19°C 65°F
Overcast
Pleasant near 20°C 68°F, cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds out of the SE at 5 km/h 3 mph.
Saturday, September 19, 2026
Mid-Morning
16°C 60°F
Overcast
Mid-Afternoon
18°C 64°F
Overcast
Early-Evening
19°C 65°F
Overcast
Mildly cool near 18°C 64°F, overcast throughout the day, with steady humidity and steady pressure. Winds switching from the ENE to the ESE at 20 km/h 13 mph.
Sunday, September 20, 2026
Mid-Morning
15°C 59°F
Light Rain
Mid-Afternoon
16°C 60°F
Light Rain
Early-Evening
17°C 62°F
Drizzle
Comfortable at 16°C 60°F, on-and-off showers throughout the day, with lower humidity and steady pressure. Winds NE at 23 km/h 15 mph.
Monday, September 21, 2026
Mid-Morning
14°C 57°F
Scattered Showers
Mid-Afternoon
15°C 60°F
Overcast
Early-Evening
15°C 59°F
Overcast
Cool with a high near 15°C 60°F, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds out of the ENE at 38 km/h 23 mph. Gusts up to 49 km/h 31 mph.
Tuesday, September 22, 2026
Mid-Morning
13°C 55°F
Scattered Showers
Mid-Afternoon
16°C 60°F
Light Showers
Early-Evening
15°C 60°F
Light Showers
Refreshing around 16°C 60°F, scattered downpours possible, with steady humidity and steady pressure. Winds shifting from the ENE to the ESE at 43 km/h 27 mph. Gusts up to 48 km/h 30 mph.
Wednesday, September 23, 2026
Mid-Morning
15°C 59°F
Light Showers
Mid-Afternoon
16°C 61°F
Light Showers
Early-Evening
17°C 62°F
Scattered Showers
Mildly cool near 16°C 61°F, locally heavy downpours at times, with steady humidity and steady pressure. Winds turning from the ESE to the SE at 22 km/h 14 mph.
Thursday, September 24, 2026
Mid-Morning
16°C 61°F
Overcast
Mid-Afternoon
16°C 61°F
Scattered Showers
Early-Evening
17°C 63°F
Overcast
Comfortable at 16°C 61°F, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds switching from the NE to the NW at 18 km/h 12 mph.
Friday, September 25, 2026
Mid-Morning
13°C 55°F
Overcast
Mid-Afternoon
16°C 60°F
Sunny
Early-Evening
14°C 56°F
Sunny
Cool with a high near 16°C 60°F, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds moving from the NW to the NNW at 26 km/h 16 mph. Gusts up to 36 km/h 22 mph.
Saturday, September 26, 2026
Mid-Morning
11°C 52°F
Sunny
Mid-Afternoon
17°C 63°F
Sunny
Early-Evening
15°C 58°F
Sunny
Refreshing around 17°C 63°F, sunny throughout the day, with lower humidity and steady pressure. Winds swinging from the NNW to the SW at 20 km/h 13 mph.
Sunday, September 27, 2026
Mid-Morning
13°C 55°F
Sunny
Mid-Afternoon
17°C 62°F
Sunny
Early-Evening
17°C 63°F
Overcast
Mildly cool near 17°C 62°F, sunny through the afternoon, turning cloudy this evening, with steady humidity and barometric pressure falling. Winds picking up from E at 5 km/h 3 mph to SSW at 18 km/h 11 mph.
Monday, September 28, 2026
Mid-Morning
17°C 63°F
Sunny
Mid-Afternoon
19°C 66°F
Sunny
Early-Evening
21°C 69°F
Sunny
Comfortable at 19°C 66°F, sunny throughout the day, with steady humidity and steady pressure. Winds blowing from the SSW at 21 km/h 13 mph. Gusts up to 32 km/h 20 mph.
Tuesday, September 29, 2026
Mid-Morning
19°C 67°F
Overcast
Mid-Afternoon
21°C 69°F
Sunny
Early-Evening
22°C 71°F
Overcast
Comfortable with temperatures reaching 21°C 69°F, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds SW at 20 km/h 13 mph.
Wednesday, September 30, 2026
Mid-Morning
20°C 67°F
Sunny
Mid-Afternoon
20°C 68°F
Overcast
Early-Evening
21°C 70°F
Sunny
Enjoyable around 20°C 68°F, sunny in the morning, overcast in the afternoon, and partly cloudy this evening, with steady humidity and barometric pressure falling. Winds moving from the SSW to the SSE at 8 km/h 5 mph.
Thursday, October 1, 2026
Mid-Morning
16°C 60°F
Overcast
Mid-Afternoon
17°C 62°F
Overcast
Early-Evening
15°C 58°F
Cloudy
Mildly cool near 17°C 62°F, overcast through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds blowing from the NNW at 26 km/h 16 mph.
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