Hamilton weather live forecast

Today's maximum temperature in Hamilton is expected to be 79°F. Select a day from the live weather forecast for Hamilton, Ontario, Canada for more weather parameters.

5-day weather forecast updated at 04:01 on Sunday 17th August 2025 GMT

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The 5-day weather forecast for Ontario (Hamilton) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Hamilton weather forecast by day

Below are the detailed weather forecasts for Hamilton for the next 5 days.

Hamilton weather for Sunday 17th August 2025

Expect isolated thunderstorms in Hamilton, Ontario with a maximum temperature of 79°F, low levels of heat & humidity, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 66% chance of some rain and a light breeze of 6 mph from the north-east.

  • 79°F maximum temperature79
    °F maximum temperature
  • 66°F minimum temperature66
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 66% chance of some rain66
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 6 mph from the North-East6
    mph wind from NE

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Hamilton weather for Monday 18th August 2025

Expect scattered clouds in Hamilton, Ontario with a maximum temperature of 70°F, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north-east.

  • 70°F maximum temperature70
    °F maximum temperature
  • 63°F minimum temperature63
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 70°F wind chill70
    °F wind chill
  • Light breeze of 7 mph from the North-East7
    mph wind from NE

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Hamilton weather for Tuesday 19th August 2025

Expect isolated thunderstorms in Hamilton, Ontario with a maximum temperature of 75°F, maximum UV of 6 (High) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 51% chance of some rain and little or no wind of 4 mph from the east.

  • 75°F maximum temperature75
    °F maximum temperature
  • 61°F minimum temperature61
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 51% chance of some rain51
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • 75°F wind chill75
    °F wind chill
  • Little or no wind of 4 mph from the East4
    mph wind from E

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Hamilton weather for Wednesday 20th August 2025

Expect isolated thunderstorms in Hamilton, Ontario with a maximum temperature of 75°F, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 38% chance of some rain and a light breeze of 4 mph from the north-east.

  • 75°F maximum temperature75
    °F maximum temperature
  • 66°F minimum temperature66
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 38% chance of some rain38
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 75°F wind chill75
    °F wind chill
  • Light breeze of 4 mph from the North-East4
    mph wind from NE

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Hamilton weather for Thursday 21st August 2025

Expect broken clouds in Hamilton, Ontario with a maximum temperature of 75°F, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the north-east.

  • 75°F maximum temperature75
    °F maximum temperature
  • 64°F minimum temperature64
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 4 mph from the North-East4
    mph wind from NE

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