Current Conditions

Grimsby, Ontario

73°F23°C
Clear

Wind

WSW 5 mph8 km/h

Humidity

43%

Cloud Cover

16%

As of Thursday, July 23, 2026 at 1:48 PM EDT

Today's Outlook

Day

Mostly clear and warm, with a high of 75°F24°C and morning low of 60°F16°C. Breezy from the W at 6 to 8 mph10 to 12 km/h.

Night

Mostly clear, with a low around 66°F19°C. Breezy from the SW at 8 mph12 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
ThursdayJul 23ClearHigh 75°F24°CLow 60°F16°CPrecip 0 in0 mmCloud 5%Wind WSW 7 mph11 km/hThursday: Mostly clear and warm, with a high of 75°F24°C and morning low of 60°F16°C. Breezy from the W at 6 to 8 mph10 to 12 km/h. Thursday Night: Mostly clear, with a low around 66°F19°C. Breezy from the SW at 8 mph12 km/h.
FridayJul 24ClearHigh 78°F26°CLow 60°F16°CPrecip 0 in0 mmCloud 9%Wind SE 4 mph7 km/hFriday: Mostly clear and warm, with a high of 78°F26°C and morning low of 64°F18°C. Light wind from the SE around 3 mph5 km/h. Friday Night: Mostly clear, with a low around 60°F16°C. Breezy from the ESE at 5 to 7 mph8 to 11 km/h.
SaturdayJul 25ClearHigh 79°F26°CLow 65°F19°CPrecip 0.01 in0.2 mm5%Cloud 38%Wind S 6 mph9 km/hSaturday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 69°F20°C. Light wind from the S around 5 mph9 km/h. Saturday Night: Mostly clear, with a low around 65°F19°C. Breezy from the S at 6 to 7 mph9 to 11 km/h.
SundayJul 26ShowersHigh 80°F26°CLow 68°F20°CPrecip 0.08 in2 mm50%Cloud 36%Wind WSW 6 mph10 km/hSunday: Partly cloudy and warm, with a high of 80°F26°C and morning low of 70°F21°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. 50% chance of showers in the afternoon. Humid. Sunday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the WSW around 6 mph9 km/h. 41% chance of showers in the evening.
MondayJul 27ShowersHigh 79°F26°CLow 68°F20°CPrecip 0.19 in4.7 mm40%Cloud 60%Wind SW 6 mph9 km/hMonday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 69°F21°C. Breezy from the SW at 6 to 7 mph9 to 11 km/h. 40% chance of showers throughout the day. Humid. Monday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the SW at 6 to 7 mph9 to 12 km/h. 38% chance of showers throughout the night.
TuesdayJul 28ShowersHigh 77°F25°CLow 70°F21°CPrecip 0.44 in11.2 mm52%Cloud 58%Wind WNW 8 mph12 km/hTuesday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 71°F22°C. Breezy from the WNW at 7 mph12 km/h. 51% chance of showers throughout the day. Humid. Tuesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the WNW at 8 to 9 mph13 to 14 km/h. 52% chance of showers throughout the night.
WednesdayJul 29DrizzleHigh 77°F25°CLow 66°F19°CPrecip 0.05 in1.2 mm15%Cloud 29%Wind NNW 8 mph12 km/hWednesday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 67°F19°C. Breezy from the NNW at 7 to 8 mph12 to 14 km/h. 15% chance of drizzle in the afternoon. Wednesday Night: Partly cloudy, with a low around 66°F19°C. Breezy from the NNW at 8 to 9 mph13 to 14 km/h. 14% chance of drizzle throughout the night.

15-Day Forecast

Day High (°F) Low (°F) Precip (mm) Cloud Cover (%) Condition Wind (mph)

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

PatternExampleDescription
/weather/{country}/{city}//weather/united-states/san-francisco/City forecast (canonical URL)
/weather/{city}//weather/tokyo/Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}//weather/united-states/california/san-francisco/With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}/weather/nearby?lat=48.1&lon=11.5Find nearest city by coordinates
/weather/{country}//weather/germany/Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 43.2001°N, 79.5663°W·Elevation: 88m·Timezone: America/Toronto·Population: 27,314