October Weather in Calgary, Canada

Last updated: April 22, 2025

October in Calgary, Canada showcases a dynamic spectrum of weather conditions, with maximum temperatures peaking at a pleasant 24°C (75°F) while the average hovers around a brisk 4°C (39°F). As the month progresses, the chill intensifies, dipping to a minimum of -22°C (-8°F), reminding residents of the impending winter. With 31 mm (1.2 in) of precipitation spread across 5 days, the atmosphere embraces a relatively humid environment, registering humidity levels at 80%. This blend of warmth and briskness creates a tapestry of experiences for those in this vibrant city during the fall season. Enjoy the rich hues of autumn, but be prepared for sudden weather shifts!

October Temperature in Calgary

As October arrives in Calgary, the city transitions into the heart of autumn, showcasing a striking temperature range that reflects the changing season. With minimum temperatures dipping to a chilly -22°C (-8°F), residents brace for the brisk air, while average temperatures hover around 4°C (39°F), hinting at the cozy sweaters and warm drinks that define this time of year. Daytime highs can still reach a pleasant 24°C (75°F), offering occasional sunny breaks that are perfect for enjoying Calgary's stunning fall foliage. This month notably marks a departure from the warmth of summer, yet the city’s climate remains remarkably variable, capturing the spirit of the Great White North where one can experience several seasons in a single day.

October Weather in Calgary: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Calgary, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec191327375058636252382920
Data source: Temperature data for Calgary generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Calgary

In October, Calgary experiences a notable shift in weather patterns, with the city receiving an average of 31 mm (1.2 in) of precipitation over just 5 days. This represents a dip compared to the more prolific summer months, but still marks a significant transition as autumn settles in. The precipitation amount in October is more than the proceeds of both January and February, hinting at the latent moisture that precedes the winter snows. The brisk air and vibrant fall colors make this a unique time to appreciate Calgary's landscape, even as the rainfall begins to taper off before the cold months ahead. Overall, October’s precipitation serves as a reminder of nature’s cyclical rhythm, transitioning from the lushness of summer to the starkness of winter.

October Precipitation Trends in Calgary

The chart displays monthly precipitation patterns in Calgary, with values for each month alongside October's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec82927386285694343312624
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

October Humidity in Calgary

As October unfolds in Calgary, the humidity levels settle at a moderate 80%, marking a subtle shift from the drier months of late summer. With a steady decline from the peak of 93% in February and a gradual drop through the warmer months, Calgary experiences a comforting balance this fall. The humidity level this month is consistent with the trends observed in the latter part of the year, where it hovers between 74% in September and 86% in November. This slight increase in moisture hints at the impending winter, where humidity levels rise again, settling in at higher percentages that characterize the colder months. Overall, October serves as a transitional period, bridging the drier summers with the more humid winters that Calgary is known for.

October Average Humidity in Calgary

This chart illustrates the average monthly humidity levels in Calgary, with October's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how October's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec91%93%88%84%80%79%80%77%74%80%86%92%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Calgary

As October rolls in, Calgary experiences a moderate UV Index of 4, indicating a slight dip from the summer months but still requiring caution. This is a significant change from the very high levels seen in the peak of summer, where UV readings soared to 9 in July. With a burn time of 30 minutes, residents should remain aware of the sun's rays, especially during midday. The trend shows a gradual decline in UV exposure as the year progresses, moving from very high levels in June through August to a more moderate index in October. As the days grow shorter and cooler, it's important to adjust sun safety practices accordingly. For more detailed information on UV levels throughout the year, visit Calgary UV Index.

Maximum UV Index Levels in Calgary for October

The chart shows the monthly maximum UV Index (UVI) for Calgary in October, 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.
JanFebMarAprMayJunJulAugSepOctNovDec234688987421
Data source: Calgary October 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.

October Sunshine in Calgary

In October, Calgary experiences a shift as the days grow shorter, marking a transition from the vibrant summer months to the brisk onset of winter. With 223 hours of sunshine, the city sees a noticeable decline compared to the sun-drenched peak of summer, where July boasts an impressive 382 hours. However, October still outshines the later months, such as November and December, which dip to 166 and 163 hours respectively. This autumn month serves as a delightful intersection of lingering warmth from summer and the coolness of approaching winter, making it a perfect time for Calgarians to embrace the outdoors while the sun still graces the landscape with its golden glow.

Monthly Sunshine Duration in Calgary: October Highlighted

The October sunshine duration represents the total number of hours Calgary experiences direct sunlight during the month of October, excluding cloudy or obstructed periods. This chart compares the sunshine duration of October with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec140h180h256h287h318h347h382h331h255h223h166h163h
Data source: Calgary October Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Calgary During October

When it comes to the likelihood of sunny weather in October in Calgary, the city enjoys a balanced 50% chance of sunshine, making it one of the more favorable months for clear skies. This mid-autumn period contrasts with earlier months like February, which sees a lower 28% chance, and December, which drops to 32%. Notably, October's ratio aligns closely with the sunshine probabilities of September and August, both hovering around 47%, suggesting a trend of relatively consistent weather as the seasons transition. With summer's lingering warmth giving way to cooler temperatures, October offers a delightful mix of sunny days, making it an ideal time for outdoor activities before winter sets in.

Percentage of Sunny Days in October in Calgary

The chart illustrates the percentage of sunny days in Calgary throughout the year, with October highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Calgary experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec43%28%46%49%37%54%58%47%47%50%42%32%
Data source: Calgary October chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Calgary in October

As October rolls into Calgary, daylight begins to dwindle after the vibrant summer months. With 10 hours of daylight, the onset of fall marks a notable decrease from the longer days of summer, which peaked at 16 hours in June. The transition from the bright, sun-filled days of May and June—where daylight lasts up to 15 hours—signals a shift towards shorter, crisper days. As the city prepares for winter, the gradual reduction in daylight continues, echoing the trend seen from September's 12 hours and foreshadowing even less light in the approaching winter months. This rhythmic dance of daylight not only reflects the seasonal changes but also invites Calgary residents to embrace the cozy charm of fall and winter activities ahead.

Average Daylight Hours in Calgary for October

The chart illustrates the variation in daylight duration in Calgary throughout the year, with October highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 28m10h 1m11h 56m13h 53m15h 35m16h 27m15h 58m14h 26m12h 33m10h 37m8h 53m7h 58m
Data source: Calgary daylight hours, calculated by summing the hours between sunrise and sunset for each day.

October Winds in Calgary

As October rolls into Calgary, the city's wind begins to pick up slightly, averaging a brisk 3.0 m/s (7 mph). This gentle yet invigorating breeze mirrors the transition of the season, providing a refreshing contrast to the milder winds of summer, which hovered around 2.4 to 2.8 m/s. While the spring months showcased an uptick in wind speed, October settles into a comfortable average that eases into the cool embrace of fall. Notably, October’s winds serve as a precursor to November's modest increase back to 3.1 m/s, suggesting a shift towards a slightly more dynamic weather pattern as the year draws to a close. Whether it's the rustling of vibrant autumn leaves or the anticipation of winter's chill, the October winds in Calgary carry with them both change and excitement.

Average October Wind Speed in Calgary

The chart displays monthly wind speed patterns in Calgary, with values for each month shown alongside October's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how October's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.22.83.23.03.12.82.42.62.73.0 m/s3.12.8
Data source: Calgary October wind data, generated using information from the Copernicus Climate Change Service.

How October Weather in Calgary Compares to Other Months

The weather in Calgary changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Calgary and find detailed weather information for every month.

October and January present distinct contrasts in weather conditions. In October, temperatures vary more dramatically, ranging from a chilly -22°C (-8°F) as the minimum to a pleasant 24°C (75°F) at its peak, with an average temperature around 4°C (39°F). This month experiences a moderate amount of precipitation, totaling 31 mm (1.2 inches) over about five days, accompanied by a relative humidity of 80%.

In sharp contrast, January is notably colder, with minimum temperatures dropping to -36°C (-32°F) and a maximum of 11°C (52°F), leading to a much lower average temperature of -7°C (20°F). Precipitation is scarce in January, with only 8 mm (0.3 inches) falling over two days, while humidity rises to 91%. For a closer look at Calgary's January weather, visit Calgary weather in January.

In comparing the weather of October and February, one can see stark differences in temperature and conditions. October enjoys a milder temperature range, with lows of -22°C (-8°F) and highs reaching up to 24°C (75°F), while February presents a more frigid scenario with a minimum temperature of -35°C (-31°F) and a maximum of only 13°C (56°F). Although both months receive similar levels of precipitation, February is wetter with nearly 29 mm over 8 days compared to October's 31 mm over just 5 days. Additionally, February has a higher humidity level of 93%, compared to October's 80%. For more details on February's weather, check out Calgary weather in February.

In comparing the weather of October and March, October showcases a wider range of temperatures, with a minimum of -22°C (-8°F) and a maximum of 24°C (75°F), yielding an average temperature of 4°C (39°F). In contrast, March experiences lower overall temperatures, with a minimum of -31°C (-23°F) and an average of -3°C (27°F), peaking at a maximum of 18°C (64°F). Both months exhibit similar precipitation levels, with October receiving 31 mm (1.2 in) over 5 days and March slightly less at 27 mm (1.1 in) over 6 days. Humidity is notably high in both months, with March being slightly more humid at 88% compared to October’s 80%. For more details, you can check Calgary weather in March.

When comparing the weather in October and April, we can see some notable similarities and differences. October features a broader temperature range with a minimum of -22°C (-8°F) and a maximum of 24°C (75°F), leading to an average of 4°C (39°F). In contrast, April has a slightly narrower range, with temperatures ranging from -17°C (1°F) to a maximum of 26°C (80°F), resulting in an average of 3°C (37°F). Precipitation levels are also slightly higher in April, with 38 mm (1.5 in) over 9 days, compared to October's 31 mm (1.2 in) across 5 days. Furthermore, humidity is marginally elevated in April at 84%, compared to October's 80%. For more details, you can refer to Calgary weather in April.

October and May present quite contrasting weather experiences. In October, temperatures typically range from a chilling minimum of -22°C (-8°F) to a pleasant maximum of 24°C (75°F), with an average of around 4°C (39°F). This month usually sees about 31 mm (1.2 in) of precipitation over approximately 5 days, accompanied by a consistent humidity level of 80%. In comparison, May offers milder conditions, with temperatures fluctuating between a low of -6°C (22°F) and a high of 29°C (85°F), averaging at 10°C (51°F). However, it experiences more rainfall, totaling about 62 mm (2.4 in) across 10 days, but retains the same humidity of 80%. For more detailed insights into the weather during this vibrant month, you can check Calgary weather in May.

October and June present contrasting weather patterns in Calgary. In October, temperatures range from a chilling minimum of -22°C (-8°F) to a more moderate maximum of 24°C (75°F), with an average of 4°C (39°F). This month experiences lighter precipitation, totaling 31 mm (1.2 in) over five days, and a high humidity of 80%. In comparison, June boasts much warmer temperatures, with a minimum of 1°C (35°F) and a sizzling maximum of 37°C (99°F), averaging at 15°C (59°F). However, this warmth comes with heavier rainfall, recording 85 mm (3.3 in) over 12 days and slightly lower humidity at 79%. For more insights on June weather specifically, you can check out Calgary weather in June.

When comparing the weather in October and July, there is a stark contrast in temperatures and precipitation patterns. October experiences a wide temperature range with a minimum of -22°C (-8°F) and a maximum of 24°C (75°F), averaging around 4°C (39°F). In contrast, July is considerably warmer, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 36°C (98°F) and an average of 17°C (63°F). Additionally, July sees more rainfall, receiving approximately 69 mm (2.7 in) over 11 days, while October has only 31 mm (1.2 in) spread across 5 days. Both months have a humidity level of 80%, but the overall feel of the weather in July is much more temperate and conducive to outdoor activities compared to the chill of October. For more detailed insights, check out this link: Calgary weather in July.

In comparing the weather of October and August, October showcases a significant drop in temperatures, with minimums plunging to -22°C (-8°F) while averaging a cool 4°C (39°F). In stark contrast, August experiences a much warmer climate, with minimums around 3°C (37°F) and average highs reaching a sweltering 16°C (62°F). Moreover, October sees a maximum temperature of 24°C (75°F), while August can peak dramatically at 38°C (100°F). Precipitation is also a factor, with October receiving 31 mm (1.2 in) over 5 days, compared to August’s higher total of 43 mm (1.7 in) spread across 7 days. Despite the higher humidity levels in October at 80%, August remains relatively humid at 77%. For a more in-depth look at August weather, you can visit Calgary weather in August.

In September, Calgary experiences warmer temperatures, with averages reaching around 11°C (52°F) and maximums peaking at 33°C (92°F). However, the weather is more humid at 74%, and there's a greater likelihood of precipitation, totaling 43 mm (1.7 in) over about 9 days. In contrast, October brings a noticeable drop in temperature, with an average of 4°C (39°F) and maximums of 24°C (75°F), but it is accompanied by slightly less rainfall at 31 mm (1.2 in) over 5 days and increased humidity at 80%. For more details, you can visit Calgary weather in September.

In October, temperatures range from a chilly minimum of -22°C (-8°F) to a pleasant maximum of 24°C (75°F), with an average temperature of 4°C (39°F). The month experiences about 31mm (1.2 inches) of precipitation over five days, accompanied by a humidity level of 80%.

In contrast, November brings even colder conditions, with a minimum of -23°C (-9°F) and an average temperature dropping to -2°C (29°F). While the maximum temperature is slightly lower at 21°C (70°F), November has a similar amount of precipitation at 26mm (1.0 inches) but occurs over a greater number of days—seven in total. Humidity also rises to 86%, indicating a damp, chilly atmosphere during this month. For more detailed insights, you can refer to Calgary weather in November.

October and December present a stark contrast in weather conditions. In October, temperatures fluctuate more widely, with a minimum of -22°C (-8°F), an average of 4°C (39°F), and a maximum of 24°C (75°F). The month experiences an average precipitation of 31 mm (1.2 in) over 5 days, with humidity levels at 80%. In contrast, December is significantly colder, featuring a minimum temperature of -35°C (-31°F), an average of -7°C (20°F), and a maximum of 14°C (58°F). Precipitation decreases slightly to 24 mm (0.9 in) over the same number of days, but humidity rises to 92%. For more details, you can check Calgary weather in December.

Compare Calgary's Climate with Cities Worldwide

Conclusion: What to Expect From October Weather in Calgary

As October settles over Calgary, a remarkable shift in weather patterns emerges, contrasting sharply with the sun-soaked days of summer. The month experiences a broad spectrum of temperatures, ranging from brisk frosts to mild afternoons, illustrating the transition toward winter. With an average of 80% humidity and precipitation spanning five days, October marks a time of muted gray skies and occasional rain, setting the stage for the snowy months ahead. This blend of conditions emphasizes the city's unique climate dynamics, making it a fascinating month to explore. For a deeper understanding of the region's weather patterns throughout the year, visit Calgary Climate.