Grimsby

Regional Municipality of Niagara, Ontario, Canada

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Current Weather

19°

Overcast

Feels Like: 19°

Min: 18°

Max: 27°

The next few hours will be overcast, with today reaching 27°C and dropping to 18°C. The coming days will be partly cloudy until night.

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Hourly Forecast

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Today

Daylight Hours

06:57

Sunrise

19:32

Sunset

12 hours 34 minutes of sunlight today

Moon

Waning Crescent

04:55

Moonrise

18:57

Moonset

Daily Forecast

Today

18°
27°

Thursday

16°
23°

Friday

13°
21°

Saturday

15°
24°

Sunday

19°
24°

Monday

17°
22°

Tuesday

19°
25°

Wednesday

17°
21°

Thursday

17°
19°

Friday

18°
27°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

73% Humid
Low High

Weather in Grimsby today, September 09, 2026

Grimsby starts September 09, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. Expect a grey start, with morning cloud around 100% by 01:00. Outdoor plans early on should not rely on bright skies.

Temperatures climb from an overnight low near 18°C toward a daytime high of about 27°C. Expect humidity between 57% and 93%, most humid near 05:00. A lighter breeze peaks around 16:00 near 8.3 km/h.

The afternoon keeps an overcast feel, as cloud reaches about 100% around 12:00. Outdoor plans may still want a flexible backup. Expect visibility near 13.9 km, with poorer spells close to 6.4 km. Expect sunrise at 06:57, sunset at 19:32, and 12 hours 34 minutes of sunlight today overall.

Taken together, settled sunshine in Grimsby on September 09, 2026 makes outdoor timing easier, with highs near 27°C.

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Metric (°C, km/h)