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August Weather in Grimsby, Canada

Last updated: June 18, 2025

In August, the average temperature in Grimsby, Canada is a pleasant 22°C (72°F). However, be prepared for some variation, as temperatures can dip to a minimum of 14°C (58°F) and peak at a warm 30°C (86°F). With an average humidity level of 72% and precipitation totaling 76 mm (3.0 in) over 11 days, it's wise to keep an umbrella handy while enjoying the mild climate!

August Temperature in Grimsby

In August, in Grimsby, the average temperature is a pleasant 22°C (72°F). Maximum temperatures can reach up to 30°C (86°F), while minimums can drop to a cooler 14°C (58°F). This mild climate makes Grimsby an ideal destination for travelers seeking comfortable weather.

August Weather in Grimsby: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Grimsby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grimsby, August typically has an average temperature of 22°C (72°F), with highs reaching up to 30°C (86°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec282934435365737266554234
Data source: Temperature data for Grimsby generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Grimsby

In Grimsby in August, the total precipitation amount is 76 mm (3.0 in), recorded over a period of 11 days.

August Precipitation Trends in Grimsby

The chart displays monthly precipitation patterns in Grimsby, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Grimsby, August typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec75836911598788876651158384
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Grimsby

In Grimsby in August humidity is 72%. With an average temperature of 22°C (72°F), this humidity feels like you are stepping into a warm, embracing blanket, making traveling feel sweaty and slightly stifling, but the balmy weather is also quite perfect for exploring local attractions.

August Average Humidity in Grimsby

This chart illustrates the average monthly humidity levels in Grimsby, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Grimsby is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Grimsby

In Grimsby in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Grimsby.

Maximum UV Index Levels in Grimsby for August

The chart shows the monthly maximum UV Index (UVI) for Grimsby in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Grimsby typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Grimsby August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Grimsby Compares to Other Months

Weather in Grimsby varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Grimsby, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Grimsby, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)75 mm (3.0 inches)91%low
February Weather-2°C (29°F)83 mm (3.3 inches)91%moderate
March Weather1°C (35°F)69 mm (2.7 inches)88%moderate
April Weather6°C (43°F)115 mm (4.5 inches)88%very high
May Weather12°C (53°F)98 mm (3.9 inches)82%very high
June Weather18°C (65°F)78 mm (3.1 inches)79%very high
July Weather23°C (73°F)88 mm (3.5 inches)77%very high
August Weather22°C (72°F)76 mm (3.0 inches)72%very high
September Weather19°C (66°F)65 mm (2.6 inches)76%high
October Weather13°C (56°F)115 mm (4.5 inches)83%moderate
November Weather5°C (42°F)83 mm (3.3 inches)88%moderate
December Weather1°C (35°F)84 mm (3.3 inches)87%low

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