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Union ON Weather - Overcast
Overcast
63°F
Updated 2:45 am
Feels Like 54°F
Humidity 53%
Wind N 14 mph
Barometer  30.24 in
Visibility 6 mi
Union ON Weather - Overcast
Overcast
17°C
Updated 2:45 am
Feels Like 12°C
Humidity 53%
Wind N 22 km/h
Barometer  102.4 kPa
Visibility 10 km
Union, ON Weather and Current Conditionsunion on weather forecast

Union, ON Weather Forecast

Union Ontario WeatherUnion, Ontario Weather Weather Forecast
14 day API Union, ON weather forecast. Note. Our 7-day weather forecast for Union, Ontario is our most reliable and accurate forecast. This model should only be used as a likely scenario. Forecasting more than 7 days is difficult.
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
Union Weather - 2026-09-18 - Morning - Cloudy
15°C 60°F
Cloudy
Mid-Afternoon
Union Weather - 2026-09-18 - Afternoon - Overcast
20°C 68°F
Overcast
Early-Evening
Union Weather - 2026-09-18 - Evening - Overcast
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
Union Weather - 2026-09-19 - Morning - Overcast
16°C 60°F
Overcast
Mid-Afternoon
Union Weather - 2026-09-19 - Afternoon - Overcast
18°C 64°F
Overcast
Early-Evening
Union Weather - 2026-09-19 - Evening - Overcast
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
Union Weather - 2026-09-20 - Morning - Light Rain
15°C 59°F
Light Rain
Mid-Afternoon
Union Weather - 2026-09-20 - Afternoon - Light Rain
16°C 60°F
Light Rain
Early-Evening
Union Weather - 2026-09-20 - Evening - Drizzle
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
Union Weather - 2026-09-21 - Morning - Scattered Showers
14°C 57°F
Scattered Showers
Mid-Afternoon
Union Weather - 2026-09-21 - Afternoon - Overcast
15°C 60°F
Overcast
Early-Evening
Union Weather - 2026-09-21 - Evening - Overcast
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
Union Weather - 2026-09-22 - Morning - Scattered Showers
13°C 55°F
Scattered Showers
Mid-Afternoon
Union Weather - 2026-09-22 - Afternoon - Light Showers
16°C 60°F
Light Showers
Early-Evening
Union Weather - 2026-09-22 - Evening - Light Showers
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
Union Weather - 2026-09-23 - Morning - Light Showers
15°C 59°F
Light Showers
Mid-Afternoon
Union Weather - 2026-09-23 - Afternoon - Light Showers
16°C 61°F
Light Showers
Early-Evening
Union Weather - 2026-09-23 - Evening - Scattered Showers
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
Union Weather - 2026-09-24 - Morning - Overcast
16°C 61°F
Overcast
Mid-Afternoon
Union Weather - 2026-09-24 - Afternoon - Scattered Showers
16°C 61°F
Scattered Showers
Early-Evening
Union Weather - 2026-09-24 - Evening - Overcast
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
Union Weather - 2026-09-25 - Morning - Overcast
13°C 55°F
Overcast
Mid-Afternoon
Union Weather - 2026-09-25 - Afternoon - Sunny
16°C 60°F
Sunny
Early-Evening
Union Weather - 2026-09-25 - Evening - Sunny
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
Union Weather - 2026-09-26 - Morning - Sunny
11°C 52°F
Sunny
Mid-Afternoon
Union Weather - 2026-09-26 - Afternoon - Sunny
17°C 63°F
Sunny
Early-Evening
Union Weather - 2026-09-26 - Evening - Sunny
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
Union Weather - 2026-09-27 - Morning - Sunny
13°C 55°F
Sunny
Mid-Afternoon
Union Weather - 2026-09-27 - Afternoon - Sunny
17°C 62°F
Sunny
Early-Evening
Union Weather - 2026-09-27 - Evening - Overcast
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
Union Weather - 2026-09-28 - Morning - Sunny
17°C 63°F
Sunny
Mid-Afternoon
Union Weather - 2026-09-28 - Afternoon - Sunny
19°C 66°F
Sunny
Early-Evening
Union Weather - 2026-09-28 - Evening - Sunny
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
Union Weather - 2026-09-29 - Morning - Overcast
19°C 67°F
Overcast
Mid-Afternoon
Union Weather - 2026-09-29 - Afternoon - Sunny
21°C 69°F
Sunny
Early-Evening
Union Weather - 2026-09-29 - Evening - Overcast
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
Union Weather - 2026-09-30 - Morning - Sunny
20°C 67°F
Sunny
Mid-Afternoon
Union Weather - 2026-09-30 - Afternoon - Overcast
20°C 68°F
Overcast
Early-Evening
Union Weather - 2026-09-30 - Evening - Sunny
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
Union Weather - 2026-10-01 - Morning - Overcast
16°C 60°F
Overcast
Mid-Afternoon
Union Weather - 2026-10-01 - Afternoon - Overcast
17°C 62°F
Overcast
Early-Evening
Union Weather - 2026-10-01 - Evening - Cloudy
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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Weather by the Numbers

Fri, 18th
Union ON Weather - Friday, Sep 18, 2026 - Sunny
Hi: 20°C 68°F
Lo: 14°C 58°F
Sunrise 07:10 AM
Sunset 07:31 PM
Wind NE 13 km/h8 mph
Dew Point 10°C51°F
uv Index 5
Barometric Pressure 102.5 kPa30.27 in
POP 5% *
Humidity 59%
Sat, 19th
Union ON Weather - Saturday, Sep 19, 2026 - Overcast
Hi: 19°C 65°F
Lo: 15°C 60°F
Sunrise 07:11 AM
Sunset 07:29 PM
Wind E 28 km/h18 mph
Dew Point 11°C53°F
uv Index 4
Barometric Pressure 102.1 kPa30.15 in
POP 18% *
Humidity 68%
Sun, 20th
Union ON Weather - Sunday, Sep 20, 2026 - Light Rain
Hi: 17°C 63°F
Lo: 14°C 58°F
Sunrise 07:12 AM
Sunset 07:27 PM
Wind NE 21 km/h13 mph
Dew Point 14°C57°F
uv Index 1
Barometric Pressure 101.5 kPa29.97 in
POP 78% *
Humidity 94%
Mon, 21st
Union ON Weather - Monday, Sep 21, 2026 - Patchy Rain Nearby
Hi: 16°C 61°F
Lo: 13°C 55°F
Sunrise 07:13 AM
Sunset 07:26 PM
Wind ENE 42 km/h26 mph
Dew Point 10°C50°F
uv Index 3
Barometric Pressure 102.1 kPa30.15 in
POP 21% *
Humidity 74%
Tue, 22nd
Union ON Weather - Tuesday, Sep 22, 2026 - Patchy Rain Nearby
Hi: 16°C 60°F
Lo: 13°C 55°F
Sunrise 07:14 AM
Sunset 07:24 PM
Wind NE 35 km/h21 mph
Dew Point 11°C52°F
uv Index 3
Barometric Pressure 101.9 kPa30.09 in
POP 32% *
Humidity 88%
Wed, 23rd
Union ON Weather - Wednesday, Sep 23, 2026 - Light Rain Shower
Hi: 17°C 62°F
Lo: 15°C 59°F
Sunrise 07:15 AM
Sunset 07:22 PM
Wind ESE 28 km/h17 mph
Dew Point 14°C56°F
uv Index 4
Barometric Pressure 102.3 kPa30.21 in
POP 50% *
Humidity 89%
Thu, 24th
Union ON Weather - Thursday, Sep 24, 2026 - Patchy Rain Nearby
Hi: 17°C 63°F
Lo: 16°C 60°F
Sunrise 07:16 AM
Sunset 07:20 PM
Wind ESE 15 km/h9 mph
Dew Point 14°C57°F
uv Index 4
Barometric Pressure 102.1 kPa30.15 in
POP 28% *
Humidity 88%
Fri, 25th
Union ON Weather - Friday, Sep 25, 2026 - Sunny
Hi: 16°C 61°F
Lo: 12°C 53°F
Sunrise 07:17 AM
Sunset 07:18 PM
Wind NNW 32 km/h20 mph
Dew Point 8°C46°F
uv Index 4
Barometric Pressure 102.2 kPa30.18 in
POP 11% *
Humidity 66%
Sat, 26th
Union ON Weather - Saturday, Sep 26, 2026 - Sunny
Hi: 17°C 63°F
Lo: 10°C 50°F
Sunrise 07:18 AM
Sunset 07:17 PM
Wind NW 21 km/h13 mph
Dew Point 5°C41°F
uv Index 4
Barometric Pressure 102.3 kPa30.21 in
POP 2% *
Humidity 52%
Sun, 27th
Union ON Weather - Sunday, Sep 27, 2026 - Sunny
Hi: 18°C 64°F
Lo: 11°C 53°F
Sunrise 07:19 AM
Sunset 07:15 PM
Wind S 12 km/h8 mph
Dew Point 5°C41°F
uv Index 5
Barometric Pressure 102.1 kPa30.15 in
POP 2% *
Humidity 50%
Mon, 28th
Union ON Weather - Monday, Sep 28, 2026 - Sunny
Hi: 21°C 70°F
Lo: 17°C 63°F
Sunrise 07:21 AM
Sunset 07:13 PM
Wind SSW 23 km/h14 mph
Dew Point 11°C52°F
uv Index 5
Barometric Pressure 101.6 kPa30 in
POP 4% *
Humidity 62%
Tue, 29th
Union ON Weather - Tuesday, Sep 29, 2026 - Overcast
Hi: 22°C 72°F
Lo: 19°C 66°F
Sunrise 07:22 AM
Sunset 07:11 PM
Wind SSW 22 km/h13 mph
Dew Point 16°C60°F
uv Index 4
Barometric Pressure 101.5 kPa29.97 in
POP 22% *
Humidity 77%
Wed, 30th
Union ON Weather - Wednesday, Sep 30, 2026 - Overcast
Hi: 22°C 71°F
Lo: 19°C 67°F
Sunrise 07:23 AM
Sunset 07:09 PM
Wind SSW 14 km/h9 mph
Dew Point 15°C60°F
uv Index 4
Barometric Pressure 101.3 kPa29.91 in
POP 11% *
Humidity 77%
Thu, 1st
Union ON Weather - Thursday, Oct 1, 2026 - Overcast
Hi: 21°C 69°F
Lo: 13°C 56°F
Sunrise 07:24 AM
Sunset 07:08 PM
Wind NW 22 km/h14 mph
Dew Point 14°C58°F
uv Index 4
Barometric Pressure 101 kPa29.83 in
POP 26% *
Humidity 84%
* POP = Probability of Precipitation. Data for 12:00 PM.