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Grimsby ON Weather - Overcast
Overcast
75°F
Updated 6:36 pm
Feels Like 69°F
Humidity 50%
Wind SSW 13 mph
Barometer  30.12 in
Visibility 6 mi
Grimsby ON Weather - Overcast
Overcast
24°C
Updated 6:36 pm
Feels Like 21°C
Humidity 50%
Wind SSW 21 km/h
Barometer  102 kPa
Visibility 10 km
Grimsby, ON Weather and Current Conditionsgrimsby on weather forecast

Grimsby, ON Weather Forecast

Grimsby Ontario WeatherGrimsby, Ontario Weather Weather Forecast
14 day API Grimsby, ON weather forecast. Note. Our 7-day weather forecast for Grimsby, 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.
Grimsby, ON Weather Forecast Dated: 636 PM Tue Sep 15 2026
Expect a cool pattern with more clouds than sun and mostly dry weather over the coming period. generally humid conditions and no major pressure swings will dominate.

Tuesday, September 15, 2026

Mid-Morning
Grimsby Weather - 2026-09-15 - Morning - Overcast
17°C 62°F
Overcast
Mid-Afternoon
Grimsby Weather - 2026-09-15 - Afternoon - Overcast
23°C 73°F
Overcast
Early-Evening
Grimsby Weather - 2026-09-15 - Evening - Overcast
24°C 74°F
Overcast
Pleasant near 23°C 73°F, overcast throughout the day, with lower humidity and steady pressure. Winds turning from the S to the SW at 20 km/h 12 mph.

Wednesday, September 16, 2026

Mid-Morning
Grimsby Weather - 2026-09-16 - Morning - Overcast
20°C 67°F
Overcast
Mid-Afternoon
Grimsby Weather - 2026-09-16 - Afternoon - Overcast
21°C 69°F
Overcast
Early-Evening
Grimsby Weather - 2026-09-16 - Evening - Overcast
21°C 70°F
Overcast
Comfortable with temperatures reaching 21°C 69°F, overcast throughout the day, with lower humidity and steady pressure. Winds switching from the N to the NE at 6 km/h 4 mph.

Thursday, September 17, 2026

Mid-Morning
Grimsby Weather - 2026-09-17 - Morning - Overcast
18°C 64°F
Overcast
Mid-Afternoon
Grimsby Weather - 2026-09-17 - Afternoon - Cloudy
19°C 66°F
Cloudy
Early-Evening
Grimsby Weather - 2026-09-17 - Evening - Overcast
20°C 68°F
Overcast
Comfortable at 19°C 66°F, overcast in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure.

Friday, September 18, 2026

Mid-Morning
Grimsby Weather - 2026-09-18 - Morning - Partly Cloudy
16°C 60°F
Partly Cloudy
Mid-Afternoon
Grimsby Weather - 2026-09-18 - Afternoon - Overcast
16°C 62°F
Overcast
Early-Evening
Grimsby Weather - 2026-09-18 - Evening - Overcast
16°C 61°F
Overcast
Cool with a high near 16°C 62°F, partly cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds moving from the NNE to the NE at 13 km/h 8 mph.

Saturday, September 19, 2026

Mid-Morning
Grimsby Weather - 2026-09-19 - Morning - Scattered Showers
14°C 57°F
Scattered Showers
Mid-Afternoon
Grimsby Weather - 2026-09-19 - Afternoon - Scattered Showers
11°C 52°F
Scattered Showers
Early-Evening
Grimsby Weather - 2026-09-19 - Evening - Cloudy
13°C 55°F
Cloudy
Brisk around 11°C 52°F, scattered downpours possible, with increasing humidity and barometric pressure falling. Winds swinging from the ESE to the E at 15 km/h 9 mph.

Sunday, September 20, 2026

Mid-Morning
Grimsby Weather - 2026-09-20 - Morning - Scattered Showers
15°C 59°F
Scattered Showers
Mid-Afternoon
Grimsby Weather - 2026-09-20 - Afternoon - Overcast
16°C 60°F
Overcast
Early-Evening
Grimsby Weather - 2026-09-20 - Evening - Overcast
16°C 61°F
Overcast
Mildly cool near 16°C 60°F, locally heavy downpours at times, with lower humidity and steady pressure. Winds shifting from the NE to the E at 28 km/h 18 mph. Gusts up to 36 km/h 23 mph.

Monday, September 21, 2026

Mid-Morning
Grimsby Weather - 2026-09-21 - Morning - Scattered Showers
16°C 60°F
Scattered Showers
Mid-Afternoon
Grimsby Weather - 2026-09-21 - Afternoon - Overcast
16°C 62°F
Overcast
Early-Evening
Grimsby Weather - 2026-09-21 - Evening - Overcast
17°C 62°F
Overcast
Comfortable at 16°C 62°F, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds turning from the ENE to the E at 28 km/h 17 mph. Gusts up to 32 km/h 20 mph.

Tuesday, September 22, 2026

Mid-Morning
Grimsby Weather - 2026-09-22 - Morning - Scattered Showers
17°C 62°F
Scattered Showers
Mid-Afternoon
Grimsby Weather - 2026-09-22 - Afternoon - Partly Cloudy
18°C 64°F
Partly Cloudy
Early-Evening
Grimsby Weather - 2026-09-22 - Evening - Sunny
18°C 65°F
Sunny
Cool with a high near 18°C 64°F, scattered downpours possible, with steady humidity and steady pressure. Winds out of the ENE at 33 km/h 21 mph. Gusts up to 32 km/h 20 mph.

Wednesday, September 23, 2026

Mid-Morning
Grimsby Weather - 2026-09-23 - Morning - Cloudy
17°C 62°F
Cloudy
Mid-Afternoon
Grimsby Weather - 2026-09-23 - Afternoon - Sunny
17°C 63°F
Sunny
Early-Evening
Grimsby Weather - 2026-09-23 - Evening - Cloudy
18°C 64°F
Cloudy
Refreshing around 17°C 63°F, overcast in the morning, sunny in the afternoon, and cloudy this evening, with increasing humidity and steady pressure. Winds moving from the NE to the E at 15 km/h 9 mph.

Thursday, September 24, 2026

Mid-Morning
Grimsby Weather - 2026-09-24 - Morning - Partly Cloudy
19°C 66°F
Partly Cloudy
Mid-Afternoon
Grimsby Weather - 2026-09-24 - Afternoon - Cloudy
23°C 74°F
Cloudy
Early-Evening
Grimsby Weather - 2026-09-24 - Evening - Overcast
22°C 71°F
Overcast
Mild with a high of 23°C 74°F, partly cloudy through the afternoon, turning overcast this evening, with steady humidity and barometric pressure falling. Winds swinging from the S to the SSE at 21 km/h 13 mph.

Friday, September 25, 2026

Mid-Morning
Grimsby Weather - 2026-09-25 - Morning - Overcast
21°C 69°F
Overcast
Mid-Afternoon
Grimsby Weather - 2026-09-25 - Afternoon - Light Showers
23°C 73°F
Light Showers
Early-Evening
Grimsby Weather - 2026-09-25 - Evening - Light Showers
21°C 69°F
Light Showers
Pleasant near 23°C 73°F, clouds and showers taking over for the afternoon and evening, with steady humidity and steady pressure. Winds shifting from the S to the SE at 17 km/h 11 mph.

Saturday, September 26, 2026

Mid-Morning
Grimsby Weather - 2026-09-26 - Morning - Scattered Showers
18°C 65°F
Scattered Showers
Mid-Afternoon
Grimsby Weather - 2026-09-26 - Afternoon - Light Showers
16°C 62°F
Light Showers
Early-Evening
Grimsby Weather - 2026-09-26 - Evening - Overcast
14°C 57°F
Overcast
Cool with a high near 16°C 62°F, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds turning from the SSW to the NNW at 37 km/h 23 mph. Gusts up to 47 km/h 29 mph.

Sunday, September 27, 2026

Mid-Morning
Grimsby Weather - 2026-09-27 - Morning - Overcast
11°C 52°F
Overcast
Mid-Afternoon
Grimsby Weather - 2026-09-27 - Afternoon - Sunny
15°C 59°F
Sunny
Early-Evening
Grimsby Weather - 2026-09-27 - Evening - Sunny
14°C 58°F
Sunny
Refreshing around 15°C 59°F, partly cloudy in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds N at 17 km/h 11 mph.

Monday, September 28, 2026

Mid-Morning
Grimsby Weather - 2026-09-28 - Morning - Sunny
12°C 53°F
Sunny
Mid-Afternoon
Grimsby Weather - 2026-09-28 - Afternoon - Cloudy
15°C 59°F
Cloudy
Early-Evening
Grimsby Weather - 2026-09-28 - Evening - Overcast
15°C 59°F
Overcast
Mildly cool near 15°C 59°F, sunny in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the NNW to the SE at 9 km/h 6 mph.

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Weather by the Numbers

Tue, 15th
Grimsby ON Weather - Tuesday, Sep 15, 2026 - Overcast
Hi: 24°C 76°F
Lo: 15°C 59°F
Sunrise 06:58 AM
Sunset 07:28 PM
Wind S 24 km/h15 mph
Dew Point 11°C51°F
uv Index 4
Barometric Pressure 102.3 kPa30.21 in
POP 13% *
Humidity 54%
Wed, 16th
Grimsby ON Weather - Wednesday, Sep 16, 2026 - Cloudy
Hi: 22°C 71°F
Lo: 19°C 66°F
Sunrise 06:59 AM
Sunset 07:26 PM
Wind NE 10 km/h6 mph
Dew Point 16°C61°F
uv Index 4
Barometric Pressure 102.6 kPa30.3 in
POP 20% *
Humidity 79%
Thu, 17th
Grimsby ON Weather - Thursday, Sep 17, 2026 - Cloudy
Hi: 21°C 69°F
Lo: 17°C 63°F
Sunrise 07:00 AM
Sunset 07:24 PM
Wind N 6 km/h4 mph
Dew Point 9°C49°F
uv Index 5
Barometric Pressure 102.4 kPa30.24 in
POP 8% *
Humidity 55%
Fri, 18th
Grimsby ON Weather - Friday, Sep 18, 2026 - Cloudy
Hi: 18°C 65°F
Lo: 15°C 59°F
Sunrise 07:01 AM
Sunset 07:23 PM
Wind NE 21 km/h13 mph
Dew Point 11°C52°F
uv Index 4
Barometric Pressure 102.6 kPa30.3 in
POP 13% *
Humidity 72%
Sat, 19th
Grimsby ON Weather - Saturday, Sep 19, 2026 - Light Drizzle
Hi: 15°C 59°F
Lo: 11°C 52°F
Sunrise 07:02 AM
Sunset 07:21 PM
Wind SE 16 km/h10 mph
Dew Point 5°C41°F
uv Index 1
Barometric Pressure 102.2 kPa30.18 in
POP 33% *
Humidity 65%
Sun, 20th
Grimsby ON Weather - Sunday, Sep 20, 2026 - Patchy Rain Nearby
Hi: 16°C 61°F
Lo: 14°C 56°F
Sunrise 07:03 AM
Sunset 07:19 PM
Wind ENE 33 km/h20 mph
Dew Point 11°C52°F
uv Index 4
Barometric Pressure 101.9 kPa30.09 in
POP 22% *
Humidity 77%
Mon, 21st
Grimsby ON Weather - Monday, Sep 21, 2026 - Overcast
Hi: 17°C 62°F
Lo: 15°C 59°F
Sunrise 07:04 AM
Sunset 07:17 PM
Wind ENE 31 km/h19 mph
Dew Point 11°C52°F
uv Index 4
Barometric Pressure 101.8 kPa30.06 in
POP 19% *
Humidity 72%
Tue, 22nd
Grimsby ON Weather - Tuesday, Sep 22, 2026 - Patchy Rain Nearby
Hi: 18°C 65°F
Lo: 16°C 61°F
Sunrise 07:05 AM
Sunset 07:15 PM
Wind ENE 33 km/h21 mph
Dew Point 14°C58°F
uv Index 4
Barometric Pressure 101.9 kPa30.09 in
POP 34% *
Humidity 82%
Wed, 23rd
Grimsby ON Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 18°C 64°F
Lo: 16°C 61°F
Sunrise 07:07 AM
Sunset 07:14 PM
Wind NE 10 km/h6 mph
Dew Point 13°C56°F
uv Index 5
Barometric Pressure 102.2 kPa30.18 in
POP 15% *
Humidity 79%
Thu, 24th
Grimsby ON Weather - Thursday, Sep 24, 2026 - Sunny
Hi: 24°C 75°F
Lo: 17°C 62°F
Sunrise 07:08 AM
Sunset 07:12 PM
Wind SSE 21 km/h13 mph
Dew Point 16°C60°F
uv Index 6
Barometric Pressure 101.8 kPa30.06 in
POP 9% *
Humidity 71%
Fri, 25th
Grimsby ON Weather - Friday, Sep 25, 2026 - Overcast
Hi: 24°C 74°F
Lo: 19°C 67°F
Sunrise 07:09 AM
Sunset 07:10 PM
Wind SSW 27 km/h17 mph
Dew Point 19°C66°F
uv Index 5
Barometric Pressure 101 kPa29.83 in
POP 23% *
Humidity 81%
Sat, 26th
Grimsby ON Weather - Saturday, Sep 26, 2026 - Light Rain Shower
Hi: 20°C 68°F
Lo: 13°C 55°F
Sunrise 07:10 AM
Sunset 07:08 PM
Wind SSW 31 km/h19 mph
Dew Point 16°C61°F
uv Index 4
Barometric Pressure 100.3 kPa29.62 in
POP 39% *
Humidity 89%
Sun, 27th
Grimsby ON Weather - Sunday, Sep 27, 2026 - Overcast
Hi: 16°C 60°F
Lo: 11°C 51°F
Sunrise 07:11 AM
Sunset 07:06 PM
Wind N 20 km/h12 mph
Dew Point 2°C35°F
uv Index 3
Barometric Pressure 102 kPa30.12 in
POP 11% *
Humidity 46%
Mon, 28th
Grimsby ON Weather - Monday, Sep 28, 2026 - Partly Cloudy
Hi: 16°C 60°F
Lo: 11°C 52°F
Sunrise 07:12 AM
Sunset 07:04 PM
Wind WSW 7 km/h4 mph
Dew Point 5°C40°F
uv Index 4
Barometric Pressure 102 kPa30.12 in
POP 4% *
Humidity 56%
* POP = Probability of Precipitation. Data for 12:00 PM.