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July Weather in Montreal, United States

Last updated: June 24, 2025

In July, the average temperature in Montreal, United States reaches a pleasant 21°C (70°F). However, be prepared for a range of temperatures, as it can dip to a minimum of 7°C (46°F) and soar up to a maximum of 34°C (94°F). During this month, expect about 87 mm (3.4 in) of precipitation over 9 days, contributing to an average humidity level of 70%.

July Temperature in Montreal

In July in Montreal, the average temperature is 21°C (70°F). Maximum temperatures can reach 34°C (94°F), while the minimum can drop as low as 7°C (46°F). Pack a variety of clothing to ensure you're comfortable for both warm days and cooler evenings during your travels.

July Weather in Montreal: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Montreal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montreal, July typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 7°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec161528385465706660463122
Data source: Temperature data for Montreal 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.

July Precipitation in Montreal

In Montreal in July, the precipitation amount is 87 mm (3.4 in), occurring over a span of 9 days.

July Precipitation Trends in Montreal

The chart displays monthly precipitation patterns in Montreal, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Montreal, July typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec395252878711187110941126174
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Montreal

In Montreal in July, humidity is 70%. With an average temperature of 21°C (70°F), this humidity feels like a warm, muggy embrace, making travel slightly uncomfortable, as the air clings to your skin and can leave you feeling sticky and in need of frequent breaks to cool down.

July Average Humidity in Montreal

This chart illustrates the average monthly humidity levels in Montreal, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Montreal is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%89%85%76%71%70%71%73%82%88%91%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Montreal

In Montreal in July, 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 Montreal.

Maximum UV Index Levels in Montreal for July

The chart shows the monthly maximum UV Index (UVI) for Montreal in July, 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 July, the maximum UV index in Montreal typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458810987532
Data source: Montreal July 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 July Weather in Montreal Compares to Other Months

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

This table compares monthly weather conditions in Montreal, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)39 mm (1.5 inches)93%low
February Weather-9°C (16°F)52 mm (2.1 inches)93%moderate
March Weather-2°C (28°F)52 mm (2.0 inches)89%moderate
April Weather3°C (38°F)87 mm (3.4 inches)85%very high
May Weather12°C (54°F)87 mm (3.4 inches)76%very high
June Weather18°C (65°F)111 mm (4.4 inches)71%very high
July Weather21°C (70°F)87 mm (3.4 inches)70%very high
August Weather19°C (67°F)110 mm (4.3 inches)71%very high
September Weather15°C (60°F)94 mm (3.7 inches)73%high
October Weather8°C (46°F)112 mm (4.4 inches)81%moderate
November Weather-1°C (31°F)61 mm (2.4 inches)87%moderate
December Weather-6°C (22°F)74 mm (2.9 inches)91%low

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