Weather for Grimsby, Ontario
Current Weather
Humidity: 77%
Feels Like: -11.7°C
Wind: W 25.3 mph
Wind Gusts: 34.4 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 1 mi
UV Index: 0
Five Day Weather Forecast
Fri
H: 6°C
L: -4°C
Sat
H: 2°C
L: -6°C
Sun
H: -1°C
L: -6°C
Mon
H: -1°C
L: -7°C
Tue
H: 3°C
L: 0°C
Air Quality
Nitrogen Dioxide: 3.05 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 79 μg/m3
Astronomical
Sun Transit: 12:15 AM
Sunset: 4:45 PM
Daylight: 8 hrs 59 mins
Moon Transit: 11:56 AM
Moonset: 4:03 PM
Moon Phase: New
Moon Illumination: 1.1%
Best Times for Fishing or Hunting
Major Periods
12:27 AM - 2:57 AM11:26 AM - 1:56 PM
Minor Periods
3:33 PM - 5:03 PM7:20 AM - 8:50 AM
Action Rating: 5 out of 5
Wind Advisory issued December 19 at 1:10PM EST until December 20 at 1:00AM EST by NWS Buffalo NY
Effective: Fri December 19, 2025, 1:10 PM
Expires: Sat December 20, 2025, 1:00 AM
* WHAT...West winds 30 to 40 mph with gusts up to 55 mph. * WHERE...Erie, Niagara, Orleans, Monroe, Wayne, Northern Cayuga, Oswego, Genesee, Wyoming, Livingston, Ontario, Cattaraugus, and Allegany Counties. * WHEN...Until 1 AM EST Saturday. * IMPACTS...Gusty winds will blow around unsecured objects, including outdoor holiday decorations. Tree limbs could be blown down and a few power outages may result.
Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects.
Winter Weather Advisory issued December 19 at 1:12PM EST until December 20 at 1:00AM EST by NWS Buffalo NY
Effective: Fri December 19, 2025, 1:12 PM
Expires: Sat December 20, 2025, 1:00 AM
* WHAT...Lake effect snow and blowing snow expected. Total snow accumulations 3 to 6 inches in the most persistent lake snows. Winds gusting as high as 45 mph. * WHERE...Wyoming, Chautauqua, Cattaraugus, and Southern Erie Counties. * WHEN...Until 1 AM EST Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Friday evening commute. Gusty winds will lead to reduced visibility in blowing snow and down tree branches causing isolated power outages.
Lake effect snow will fall in relatively narrow bands. If traveling, be prepared for rapidly changing road conditions and visibilities. Submit snow reports through our website or social media. Be prepared for slippery roads. Slow down and use caution while driving. If you are going outside, be careful on stairs, sidewalks, and driveways. These surfaces could be icy and slippery, increasing your risk of a fall and injury.
Weather Forecast
Average Temperature: 2.3°C
Average Humidity: 79%
Wind: 31.1 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 7.18 μg/m3
Sulphur Dioxide: 3.8 μg/m3
Ozone: 66.48 μg/m3
Astronomical
Sun Transit: 12:15 AM
Sunset: 4:45 PM
Daylight: 8 hrs 59 mins
Moon Transit: 11:56 AM
Moonset: 4:03 PM
Moon Phase: New
Moon Illumination: 1.1%
Best Times for Fishing or Hunting
Major Periods
12:27 AM - 2:57 AM11:26 AM - 1:56 PM
Minor Periods
3:33 PM - 5:03 PM7:20 AM - 8:50 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: -1.3°C
Average Humidity: 73%
Wind: 28 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 8.18 μg/m3
Sulphur Dioxide: 4.05 μg/m3
Ozone: 68.4 μg/m3
Astronomical
Sun Transit: 12:15 AM
Sunset: 4:45 PM
Daylight: 8 hrs 59 mins
Moon Transit: 12:49 AM
Moonset: 4:59 PM
Moon Phase: New
Moon Illumination: 0.0%
Best Times for Fishing or Hunting
Major Periods
1:19 AM - 3:49 AM12:19 AM - 2:49 PM
Minor Periods
4:29 PM - 5:59 PM8:12 AM - 9:42 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: -2.5°C
Average Humidity: 67%
Wind: 28 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 8.56 μg/m3
Sulphur Dioxide: 3.09 μg/m3
Ozone: 63 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 4:46 PM
Daylight: 8 hrs 59 mins
Moon Transit: 1:41 PM
Moonset: 6:02 PM
Moon Phase: New
Moon Illumination: 1.5%
Best Times for Fishing or Hunting
Major Periods
2:12 AM - 4:42 AM1:11 PM - 3:41 PM
Minor Periods
5:32 PM - 7:02 PM8:55 AM - 10:25 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: -4°C
Average Humidity: 80%
Wind: 13.9 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 8.9 μg/m3
Sulphur Dioxide: 3.16 μg/m3
Ozone: 65.56 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 4:46 PM
Daylight: 8 hrs 59 mins
Moon Transit: 2:31 PM
Moonset: 7:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.5%
Best Times for Fishing or Hunting
Major Periods
3:03 AM - 5:33 AM2:01 PM - 4:31 PM
Minor Periods
6:39 PM - 8:09 PM9:30 AM - 11:00 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 2.1°C
Average Humidity: 91%
Wind: 17.4 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 18.56 μg/m3
Sulphur Dioxide: 6.07 μg/m3
Ozone: 47.23 μg/m3
Astronomical
Sun Transit: 12:17 AM
Sunset: 4:47 PM
Daylight: 8 hrs 59 mins
Moon Transit: 3:19 PM
Moonset: 8:19 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.7%
Best Times for Fishing or Hunting
Major Periods
3:52 AM - 6:22 AM2:49 PM - 5:19 PM
Minor Periods
7:49 PM - 9:19 PM9:59 AM - 11:29 AM
Action Rating: 2 out of 5