Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™

Grimsby, Ontario

50°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Grimsby

Ontario

50°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
Grimsby, Ontario Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center

Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

January

January February March April May June July August September October November December

2027

2025 2026 2027

10-Day

S
M
T
W
T
F
S
27
Mostly cloudy
30°
12°
28
Partly sunny
30°
10°
29
Sun and clouds
31°
12°
30
Clouds and sun
29°
22°
31
A blend of sun and clouds
31°
24°
1
Rain, freezing on surfaces
36°
17°
2
Cloudy with a little snow
32°
19°
3
Colder with snow at times
26°
15°
4
A.M. flurries; mostly cloudy
30°
24°
5
Sunshine and a few clouds
31°
28°
6
Snow and rain in the p.m.
36°
29°
7
Rain and ice in the morning
40°
20°
8
Rain and ice in the morning
43°
15°
9
Sun and clouds; windy, colder
29°
16°
10
Windy and colder with snow
21°
18°
11
Periods of snow
25°
16°
12
Cloudy with a bit of snow
23°
14°
13
Snow at times
22°
10°
14
Cold with occasional snow
19°
10°
15
Mainly cloudy
22°
17°
16
Sunshine and some clouds
24°
18°
17
Mostly sunny
27°
24°
18
Mostly cloudy
30°
15°
19
Windy with snow
32°
11°
20
Periods of snow
24°
11°
21
Cold with periods of snow
20°
17°
22
Partly sunny
27°
25°
23
Some sun
34°
26°
24
Intervals of bright sunshine
35°
28°
25
A little afternoon rain
36°
28°
26
Rain and ice in the morning
38°
26°
27
Cloudy
37°
27°
28
Mostly cloudy
38°
25°
29
Mostly cloudy
37°
25°
30
Periods of snow
33°
25°
31
Hist. Avg.
31°
17°
1
Hist. Avg.
31°
17°
2
Hist. Avg.
31°
18°
3
Hist. Avg.
32°
18°
4
Hist. Avg.
32°
18°
5
Hist. Avg.
32°
18°
6
Hist. Avg.
32°
18°

Temperature Graph

°F
50° 40° 30° 20° 10° Jan
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 *31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable

January Weather in Grimsby

Grimsby's January 2027 forecast shows daily high temperatures ranging from 19° to 43°, with overnight lows between 10° and 29°. The average high for January is 30° with an average low of 19°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Grimsby. See also: February | March | April.

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Pineapple express to rain buckets, renew flash flooding in Southwest

6 hours ago

Travel

Erosion threatens California’s PCH as Newsom orders El Niño preps

3 days ago

Weather Forecasts

No frigid air coming to U.S. despite polar vortex being on the move

9 hours ago

Severe Weather

Severe storms threaten Plains, Election Day plans

6 hours ago

Weather Forecasts

Election Day weather: Rain, storms could complicate trips to polls

8 hours ago

More Stories

Featured Stories

Weather News

New daylight saving time bill takes different approach to time changes

1 day ago

Weather News

Secret to more fireflies next summer is hiding under fallen leaves

1 day ago

Winter Weather

5 East Coast ski areas to check out this winter, from an expert

1 day ago

Weather News

4 struck by lightning at El Mirage Elementary in Arizona

1 day ago

Weather News

Drought uncovers Colorado historic highway as water reservoir shrinks

3 days ago

World North America Canada Ontario Grimsby

Weather Near Grimsby:

  • Brampton, Ontario
  • Mississauga Valley, Ontario
  • Toronto, Ontario
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...