Last updated: April 22, 2025
In September, Mont-Royal, Canada, experiences a diverse range of weather patterns, making it a month of transition. With maximum temperatures soaring to 31°C (88°F), the warmth is complemented by a refreshing average of 17°C (62°F). However, nights can get brisk, dipping to a minimum of 3°C (38°F). Rainfall is a notable feature this month, contributing 69 mm (2.7 in) of precipitation over approximately 9 days, while humidity levels hover at a comfortable 78%. This blend of warm days and cooler evenings, along with intermittent showers, creates an inviting atmosphere for outdoor activities and exploration.
In September, Mont-Royal begins to bid farewell to the sweltering days of summer, offering a refreshing transition as temperatures cool. The month showcases a minimum of 3°C (38°F), averaging a pleasant 17°C (62°F), with a maximum reaching around 31°C (88°F). This dip from August's warmth reveals a distinct shift as autumn approaches; however, the lingering warmth still allows for ideal outdoor activities. As daylight shortens, visitors can enjoy the gorgeous fall foliage against the backdrop of these comfortable temperatures, marking September as a delightful blend of summer's end and autumn's embrace.
In September, Mont-Royal experiences a notable decrease in precipitation, accumulating 69 mm (2.7 in) over 9 days—the lowest monthly totals of the year thus far. This marks a shift from the wetter summer months, such as August, which saw 98 mm of rain. As the region transitions into fall, the reduction in rainfall hints at the approaching cold season, with average monthly figures climbing again in October to 132 mm (5.2 in). This trend underscores the seasonal variability characteristic of Mont-Royal's climate, as the landscape braces for the crisp autumn air while soaking up the last remnants of summer’s moisture.
In Mont-Royal, Canada, September marks a subtle transition in humidity levels as the summer months draw to a close. With a relative humidity of 78%, September sits comfortably amid the season's waning warmth, showing a slight increase from August's 75%. This gradual uptick is part of a broader trend where humidity levels typically rise again in the fall, reaching 86% by October. The preceding months reveal a steady decline from the year's peak in January at 93%, illustrating how the crispness of autumn begins to seep in. As the air becomes a bit heavier, September offers a refreshing blend of lingering summer warmth and the cool embrace of the approaching fall, making it a unique time to experience the natural beauty of Mont-Royal.
As summer transitions into fall, the UV Index in Mont-Royal, Canada shows a gradual decline, reflecting the shifting sunlight. September features a UV Index of 7, categorized as high, which means that while exposure remains significant with a burn time of 25 minutes, it’s less intense than the peak summer months of May and June, both registering a UV Index of 9. This trend of decreasing UV levels continues into October, with the index dropping to 5, indicating a moderate risk. Residents and visitors alike should remain vigilant during September, as the sun's potential for causing skin damage persists. For detailed information on the UV Index throughout the year, check out the Mont-Royal UV Index.
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As summer gracefully transitions into fall, September in Mont-Royal shines brightly with an impressive 281 hours of sunshine. This month marks a gentle decline from the peak of 342 hours in July, reflecting the natural rhythm of the seasons. The steady abundance of sunlight in September continues a trend established over the summer months, where June and August also boasted over 300 hours each. As daylight gradually recedes in the ensuing months, with October offering just 196 hours, September becomes a cherished pocket of warmth and light, inviting locals and visitors alike to bask in its golden glow before autumn takes hold.
September in Mont-Royal, Canada, brings a moderate chance of sunny weather, with about 42% likelihood of clear skies. This marks a slight increase from the drearier summer months, where July and June dipped to 34% and 36% respectively. Interestingly, September’s sunny prospects are enhanced compared to both the cold winter months and the unpredictable temperatures of April (37%) and May (41%). As autumn approaches, the weather starts to shift, with an optimistic forecast for sunshine in September, standing just below the sunnier months of March (44%) and August (44%). This blend of warmth and early autumn colors makes September an inviting time to enjoy the outdoors in Mont-Royal.
As summer gives way to autumn in Mont-Royal, Canada, September sees daylight gradually diminishing to around 12 hours. This marks a gentle decline from the sun-drenched 15 hours of daylight experienced in the peak of summer months, July and August. Following the vibrant blooms of May and the long, bright days of June, the transition into fall continues with October bringing further reductions, dipping to 10 hours. This trend highlights the shifting seasons, encapsulating the beauty of nature's cyclical rhythm as the days shorten and prepare for the crisp days of winter ahead.
As autumn gently approaches Mont-Royal in September, the wind begins to whisper tales of change, with an average speed of 3.3 m/s (7 mph). This slight uptick from the summer months, where winds hovered around 3.0 m/s, indicates a shift in the air as nature prepares for the vibrant foliage of fall. The consistency in wind speed throughout the spring and summer months, averaging 3.5 m/s, showcases a calmness that residents and visitors have come to expect. Yet, as the season transitions, it’s clear that nature’s breath is becoming a bit more pronounced, hinting at the brisk months ahead. With October showing similar breezes, it’s a reminder that while the warm days may dwindle, the enchanting beauty of Mont-Royal remains ever-present in the rustling leaves and crisp air.
The weather in Mont-Royal changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Mont-Royal and find detailed weather information for every month.
September and January present starkly contrasting weather conditions. In September, temperatures range from a mild 3°C (38°F) at night to a warm average of 17°C (62°F) and can peak at 31°C (88°F). This month sees about 69 mm (2.7 in) of precipitation spread over 9 days, with a humidity level of 78%. In contrast, January is characterized by frigid temperatures, where it can plunge to a chilling -31°C (-24°F) at night, with an average temperature of -8°C (18°F) and a maximum of just 10°C (50°F). Despite slightly higher precipitation at 84 mm (3.3 in) over 10 days, the humidity rises to a brisk 93%. For a detailed look at January weather, visit Mont-Royal weather in January.
September and February present strikingly different weather profiles. In September, temperatures range from a mild 3°C (38°F) at night to a warm 31°C (88°F) during the day, with an average of 17°C (62°F). The month typically experiences about 69 mm (2.7 in) of precipitation over 9 days, paired with a moderate humidity level of 78%. In stark contrast, February is significantly colder, with temperatures dropping as low as -24°C (-10°F) at night and reaching a maximum of only 11°C (53°F) during the day. With an average temperature of -7°C (20°F), February sees an increase in precipitation to 85 mm (3.3 in), occurring over 12 days, and higher humidity at 92%. For a closer look at February weather specifics, visit Mont-Royal weather in February.
In September, temperatures in Mont-Royal average around 17°C (62°F), with daily highs reaching up to 31°C (88°F), while the nights are relatively mild, with a minimum of 3°C (38°F). The weather tends to be humid at 78%, and precipitation occurs over about 9 days, totaling around 69 mm (2.7 in). In contrast, March brings a stark transformation; temperatures drop significantly, with a maximum of only 19°C (66°F) and a chilling minimum of -22°C (-8°F), averaging around -2°C (29°F). March also sees slightly higher precipitation of 85 mm (3.3 in) spread over 11 days, along with an increase in humidity to 86%. This transition highlights the stark seasonal contrast experienced between the two months. For more details, you can check Mont-Royal weather in March.
September and April present contrasting weather patterns. In September, temperatures range from a mild 3°C (38°F) at night to a warm 31°C (88°F) during the day, with an average of 17°C (62°F). This month sees less precipitation, totaling 69 mm (2.7 in) over approximately 9 days, and humidity levels around 78%. In contrast, April experiences cooler temperatures, with minimums plunging to -10°C (15°F) and maximums reaching 22°C (72°F), averaging 6°C (42°F). Additionally, April is marked by higher precipitation of 120 mm (4.7 in) spread over 12 days and slightly elevated humidity at 85%. For more detailed information, visit Mont-Royal weather in April.
September and May present contrasting yet pleasantly mild weather patterns. In September, temperatures range from a cool 3°C (38°F) at night to a warm 31°C (88°F) during the day, with an average of 17°C (62°F). The month experiences about 69 mm (2.7 in) of rainfall over 9 days, accompanied by a humidity level of 78%. In comparison, May tends to be slightly cooler, with temperatures varying from a minimum of 0°C (33°F) to a maximum of 30°C (87°F) and an average of 13°C (56°F). The precipitation is higher, totaling 96 mm (3.8 in) across 11 days, with humidity levels reaching 80%. For those interested in exploring specific conditions, more details can be found at Mont-Royal weather in May.
In comparing the weather between September and June, we see some notable differences. September typically experiences a wider temperature range, with minimum temperatures around 3°C (38°F) and maximums reaching up to 31°C (88°F), while June has slightly warmer averages, with minimums of 4°C (40°F) and maximums up to 32°C (89°F). Precipitation levels are also a factor, as September receives about 69 mm (2.7 in) over 9 days, whereas June sees 97 mm (3.8 in) across 11 days. Interestingly, despite having more rainfall in June, the humidity remains slightly lower at 74%, compared to 78% in September. For a detailed look at the June weather, you can check Mont-Royal weather in June.
In comparing the weather of September and July, one can notice distinct differences in temperature and precipitation patterns. September experiences a more moderate temperature range, with minimums around 3°C (38°F) and maximums reaching up to 31°C (88°F), while July is generally warmer, with minimums of 12°C (54°F) and maximums peaking at 34°C (93°F). The average temperature in September is 17°C (62°F), compared to 22°C (73°F) in July. Additionally, September sees 69 mm (2.7 in) of precipitation over 9 days, while July has slightly heavier rainfall at 89 mm (3.5 in) over 13 days, resulting in a somewhat more humid atmosphere in September at 78% versus 76% in July. For more detailed information about July weather, you can visit Mont-Royal weather in July.
In comparing the weather conditions of September and August, September experiences a wider temperature range with a minimum of 3°C (38°F) and a maximum of 31°C (88°F), averaging around 17°C (62°F). In contrast, August is generally warmer with a minimum of 10°C (50°F) and a maximum of 32°C (89°F), along with a higher average temperature of 21°C (71°F). Precipitation is also notable, as September sees 69 mm (2.7 in) over 9 days, while August has more rainfall at 98 mm (3.9 in) across 13 days. Humidity levels are relatively comparable, with September at 78% and August slightly lower at 75%. For more detailed information on August weather, you can visit Mont-Royal weather in August.
September typically features warmer weather with an average temperature of 17°C (62°F) and maximum highs reaching 31°C (88°F), while October sees a notable drop in temperatures, averaging 10°C (51°F) and peaking at 25°C (77°F). Precipitation also increases from 69 mm (2.7 in) over 9 days in September to 132 mm (5.2 in) across 13 days in October, contributing to a more humid environment with the humidity rising from 78% to 86%. For more details on the weather patterns in October, you can refer to Mont-Royal weather in October.
In September, the weather is generally mild and fluctuates significantly, with temperatures ranging from a chilly 3°C (38°F) at night to a warm 31°C (88°F) during the day. The month sees an average temperature of 17°C (62°F) and approximately 69 mm (2.7 in) of precipitation over 9 days, coupled with humidity around 78%. In contrast, November brings a stark shift, with average temperatures dropping to a chilly 2°C (36°F) and nighttime lows plummeting to -17°C (2°F). Precipitation increases to 115 mm (4.5 in) over 13 days, leading to higher humidity levels at 88%. For a detailed look at the weather in November, you can refer to Mont-Royal weather in November.
September weather is characterized by mild temperatures, with averages around 17°C (62°F) and maximums reaching up to 31°C (88°F). The month sees about 69 mm (2.7 in) of precipitation over roughly 9 days, all while maintaining a humidity level of 78%. In contrast, December brings a stark chill, with average temperatures dropping to -4°C (24°F) and maximums peaking at 15°C (59°F). This month experiences colder conditions, with a substantial increase in precipitation to 89 mm (3.5 in) spread over 12 days, alongside a higher humidity of 89%. For more specific details about December weather in Mont-Royal, you can check Mont-Royal weather in December.
As September unfolds in Mont-Royal, it marks a transition from the heat of summer to the crispness of autumn. The temperatures begin to cool, creating a refreshing shift in the air, while the delightful blend of warmth and chill invites outdoor exploration. With an average temperature hovering around a comfortable 17°C, this month is characterized by a mix of sunny days and occasional rain, as evidenced by the increased precipitation that occurs on nearly a third of the days. The higher humidity lingers, making for a unique blend of summer and fall that is quintessentially Mont-Royal. For an in-depth look at the weather patterns throughout the year, visit Mont-Royal Climate.