September Weather in Stratford, Canada

Last updated: April 22, 2025

In September, Stratford, Canada transitions into crisp autumn air, marked by a maximum temperature reaching 31°C (88°F) while the average settles at 17°C (62°F). Residents experience the occasional chill, with minimums dipping to -1°C (31°F), hinting at the season's change. Rainfall is a notable feature this month, with 89 mm (3.5 inches) of precipitation spread over 11 days, contributing to the region’s lush scenery. The humidity level hovers around a balmy 81%, creating a rich atmosphere that enhances the vibrant tones of fall foliage.

September Temperature in Stratford

As September arrives in Stratford, Canada, the weather begins to transition from the warmth of summer to the cooler embrace of autumn. With average temperatures hovering around 17°C (62°F) and daytime highs reaching up to 31°C (88°F), the month still retains a taste of summer's warmth. However, the nights take on a chillier character, dipping to a minimum of -1°C (31°F), signaling the approach of fall. This blend of warmth and crispness invites the vibrant hues of autumn foliage, creating a picturesque backdrop for outdoor activities. September truly encapsulates a delightful turning point in Stratford's climate, where summer's linger still contrasts beautifully with the incoming refreshment of autumn.

September Weather in Stratford: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Stratford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec232432425666706862513730
Data source: Temperature data for Stratford 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.

September Precipitation in Stratford

September in Stratford, Canada, sees a notable shift in precipitation patterns as summer transitions into fall. With 89 mm (3.5 in) of rain recorded over 11 days, the month maintains a robust level of moisture, contributing to the lushness of the landscape. This amount is slightly below the rainfall totals of August and, interestingly, precedes a more significant spike in October, which experiences the highest monthly precipitation of the year at 122 mm (4.8 in). The relatively consistent number of rainy days throughout the late summer into early autumn suggests a steady climate cycle, setting the stage for the vibrant colors of fall foliage while dampening the soil, ensuring a rich environment for the upcoming season's growth. As Stratford greets September, the blend of moderate rain and cooling temperatures creates an inviting atmosphere, reflective of nature's graceful transition.

September Precipitation Trends in Stratford

The chart displays monthly precipitation patterns in Stratford, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec80827510710211390102891229276
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stratford

In Stratford, Canada, the humidity levels present a fascinating seasonal rhythm. As the year begins, residents experience a peak in humidity, with January and February reaching a notable 90%. As spring unfolds, levels gradually ease to 87% in March and April, before dipping further to 82% in May. The summer months bring a slight respite, with July and August seeing humidity stabilize around 79% and 80%, respectively. Just as fall arrives, September maintains an 81% humidity level, reflecting a subtle consistency in the comfortable yet slightly moist conditions that characterize the transition into autumn. This mild dip continues into October at 84%, followed by an uptick in humidity as winter approaches, reminding residents of the cyclical nature of weather patterns in this charming locale.

September Average Humidity in Stratford

This chart illustrates the average monthly humidity levels in Stratford, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%88%87%83%81%79%80%81%84%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Stratford

As September rolls into Stratford, Canada, the UV Index begins to taper slightly from the summer highs, yet it still remains firmly in the very high exposure category. With a UV Index of 8, residents and visitors alike should be cautious, as the recommended burn time is just 15 minutes. This trend marks a continuation of the intense UV radiation experienced through July and August, where indices peaked at 10. While September signals a gradual transition toward lower UV levels, it's essential to maintain sun safety practices during this time. For more detailed information on UV exposure throughout the year, check out Stratford UV Index.

Maximum UV Index Levels in Stratford for September

The chart shows the monthly maximum UV Index (UVI) for Stratford in September, 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.
JanFebMarAprMayJunJulAugSepOctNovDec24589101098542
Data source: Stratford September 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.

September Sunshine in Stratford

In September, Stratford, Canada, basks in delightful warmth, enjoying 293 hours of sunshine—almost as radiant as the vibrant summer months that precede it. This marks a gentle decline from the peak sunshine of July and August, which both basked in a generous 350 and 336 hours respectively. As autumn approaches, the sunlit days begin to shorten, following the upward trend seen from the chilly beginning of the year, where January barely recorded 95 hours. The steady increase from winter through to summer showcases Stratford's transition into brighter, more lively seasons, making September a perfect blend of lingering summer vibes and the promising whispers of fall.

Monthly Sunshine Duration in Stratford: September Highlighted

The September sunshine duration represents the total number of hours Stratford experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec95h145h229h241h294h336h350h336h293h207h143h112h
Data source: Stratford September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Stratford During September

As summer transitions to autumn, September in Stratford, Canada boasts a 45% chance of sunny weather. This marks a slight dip from the sunny days of August, which enjoys a favorable 49%; however, it still represents one of the more promising months for sunshine throughout the year. The trend of increasing likelihood of sunshine from the winter months—where the chance hovers around a mere 12% in January—reaches a peak in late summer with July and August. Notably, September retains a significant chance of clear skies, particularly when compared to the gloomier days of spring and fall, indicating that this early autumn month is a great opportunity to bask in the sun before the chill of October sets in.

Percentage of Sunny Days in September in Stratford

The chart illustrates the percentage of sunny days in Stratford throughout the year, with September 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 Stratford experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec12%19%42%36%41%40%44%49%46%25%33%19%
Data source: Stratford September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Stratford in September

In September, Stratford, Canada enjoys a delightful 12 hours of daylight, marking a subtle transition as summer begins to wane. This month features a gentle decline in daylight hours compared to the vibrant 14 hours in May and 15 hours in June, reflecting the approaching fall. Interestingly, September's daylight duration is still more generous than the short winter months, showcasing a gradual easing into the cozy autumn vibe. As daylight dims ever so slightly, locals and visitors alike can fully embrace the beauty of early fall, where the warmth of summer lingers just a bit longer before giving way to the crispness of October.

Average Daylight Hours in Stratford for September

The chart illustrates the variation in daylight duration in Stratford throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 22m10h 31m11h 57m13h 26m14h 42m15h 20m14h 59m13h 52m12h 26m10h 57m9h 40m9h
Data source: Stratford daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Stratford

As September graces Stratford, Canada, the winds begin to pick up slightly, averaging 3.6 m/s (8 mph), reminiscent of the refreshing breezes of late spring. This gentle increase in wind speed follows the summer's calmest months, where August recorded a low of 2.6 m/s (6 mph). Notably, September's winds are on par with October, suggesting a transition towards the cooler autumn season. As we move through the fall, wind speeds will continue to rise, peaking in December at 4.4 m/s (10 mph). This trend not only highlights the dynamic nature of Stratford's seasonal weather but also prepares residents for the brisk days ahead, invigorating the landscape with a whisper that signals change.

Average September Wind Speed in Stratford

The chart displays monthly wind speed patterns in Stratford, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.43.94.33.83.43.63.12.63.6 m/s3.63.94.4
Data source: Stratford September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Stratford Compares to Other Months

The weather in Stratford 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 Stratford and find detailed weather information for every month.

September and January present stark contrasts in weather patterns. September boasts a mild average temperature of 17°C (62°F), with daytime highs reaching up to 31°C (88°F), making it a pleasant month for outdoor activities. Despite some precipitation, averaging 89 mm (3.5 in), the humidity sits at a relatively comfortable 81%. In contrast, January brings frigid conditions, with average temperatures plummeting to -5°C (24°F) and nighttime lows dipping as low as -26°C (-14°F). While January sees a similar number of precipitation days (11), it delivers only 80 mm (3.2 in) of moisture, coupled with slightly higher humidity at 90%. For more information about the weather specifics in January, you can check Stratford weather in January.

September and February present stark contrasts in weather patterns. September boasts a much warmer climate, with average temperatures reaching 17°C (62°F) and maximum highs peaking at 31°C (88°F), while February is defined by its cold, with average temperatures dropping to -4°C (25°F) and max temperatures only reaching 16°C (61°F). Although both months experience a similar amount of precipitation—with September receiving 89 mm (3.5 in) over 11 days and February slightly less at 82 mm (3.2 in) over 13 days—February's higher humidity at 90% makes the cold feel even more biting. For a detailed look at February weather, you can check out Stratford weather in February.

In September, the weather is generally milder, with temperatures ranging from a minimum of -1°C (31°F) to a comfortable maximum of 31°C (88°F) and an average of 17°C (62°F). While the month experiences precipitation on about 11 days, totaling 89 mm (3.5 in), the humidity hovers around 81%. Conversely, March presents a stark contrast, with temperatures dropping significantly, seeing a minimum of -23°C (-8°F) and an average of 0°C (33°F), peaking at a more moderate 20°C (68°F). Despite lower total precipitation of 75 mm (3.0 in) spread over 12 days, the humidity is slightly higher at 87%. To delve deeper into March weather specifics, you can check Stratford weather in March.

In comparing the weather of September and April, September tends to offer milder temperatures with an average of 17°C (62°F) and maximums reaching up to 31°C (88°F), marking it as a warmer month. In contrast, April is cooler, with an average temperature of only 6°C (43°F) and maximums around 25°C (77°F). Both months see considerable precipitation, with April receiving slightly more at 107 mm (4.2 in) over 15 days, compared to September's 89 mm (3.5 in) over 11 days. Humidity levels are relatively high in both months, with April slightly ahead at 87% compared to September's 81%. For more detailed insights into April weather, you can visit Stratford weather in April.

In comparing the weather of September and May, both months exhibit a wide temperature range, with maximums reaching up to 31°C (88°F). However, September tends to be warmer overall, with an average temperature of 17°C (62°F) compared to May's average of 13°C (56°F). Interestingly, while September experiences slightly less precipitation at 89 mm (3.5 in) over 11 days, May sees a bit more rainfall at 102 mm (4.0 in) across 13 days. Humidity levels are similar in both months, with September at 81% and May at 82%. For more detailed insights into May's weather, you can visit Stratford weather in May.

In comparing the weather of September and June, both months exhibit similar humidity levels at 81%, contributing to a generally comfortable atmosphere. However, September experiences a broader temperature range, with minimums dipping down to -1°C (31°F) while averaging 17°C (62°F) and peaking at 31°C (88°F). In contrast, June has milder temperatures, with minimums of 4°C (39°F), an average of 19°C (66°F), and maximums reaching 32°C (90°F). Additionally, September sees slightly less precipitation at 89 mm (3.5 in) over 11 days compared to June's 113 mm (4.5 in) over the same number of days. For more details, you can explore Stratford weather in June.

When comparing the weather in September to that of July, several notable differences emerge. September experiences a wider temperature range, with minimums dropping to 1°C (31°F) and maximums peaking at 31°C (88°F), making it cooler overall with an average of 17°C (62°F). In comparison, July is warmer, with minimum temperatures around 9°C (49°F) and maximums reaching up to 33°C (92°F), resulting in a comfortable average of 21°C (71°F). Precipitation levels are similar, with both months receiving around 90 mm (3.5 in), though September has slightly fewer rainy days at 11 compared to July's 13. Humidity levels are also quite close, with September at 81% and July at 79%. For more detailed information, check out Stratford weather in July.

In comparing the weather patterns of September and August, we observe that September experiences a wider temperature range, with minimums dropping to -1°C (31°F) compared to August's milder 5°C (41°F). The average temperature in September is slightly lower at 17°C (62°F), while both months share a maximum temperature of 31°C (88°F). Precipitation is somewhat less in September, totaling 89 mm (3.5 in) over 11 days, while August sees 101 mm (4.0 in) across 13 days. Humidity levels remain relatively consistent, with September at 81% and August at 80%. For more specific details about August weather, visit Stratford weather in August.

September and October present distinct contrasts in weather patterns. In September, temperatures range from a chilly low of -1°C (31°F) to a warm high of 31°C (88°F), averaging around 17°C (62°F). The month sees a moderate level of precipitation at 89 mm (3.5 in) over 11 days, with humidity at 81%. In comparison, October brings cooler conditions, with a minimum temperature of -3°C (27°F) and an average of 10°C (51°F), peaking at 27°C (82°F). Precipitation increases to 122 mm (4.8 in) over 15 days, and humidity also rises slightly to 84%. For a more detailed look at this month, check out Stratford weather in October.

September typically presents a more moderate climate with an average temperature of 17°C (62°F) and maximum highs reaching up to 31°C (88°F). The month features relatively lower humidity levels at 81% and experiences about 89 mm (3.5 in) of precipitation over 11 days. In contrast, November is noticeably colder, with average temperatures dropping to 3°C (37°F) and minimum temperatures plunging to -14°C (6°F). While precipitation is slightly higher at 92 mm (3.6 in) over 14 days, the humidity also rises to 88%. For a deeper look into November's weather specifics, you can refer to Stratford weather in November.

September weather in Stratford is generally mild and pleasant, with temperatures ranging from a chilly -1°C (31°F) at night to a warm 31°C (88°F) during the day, averaging around 17°C (62°F). This month typically sees about 89 mm (3.5 in) of precipitation over 11 days, alongside a humidity level of 81%. In contrast, December brings a significant chill, with temperatures plummeting to a minimum of -24°C (-11°F) and averaging -1°C (30°F), peaking at 15°C (60°F). Although December records less precipitation at 76 mm (3.0 in) over 14 days, the humidity increases slightly to 87%. For more detailed insights into December's climate, you can check Stratford weather in December.

Compare Stratford's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Stratford

As September unfolds, Stratford experiences a transition from the warmth of summer to the crispness of autumn. With a maximum temperature that can soar up to 31°C, the month often delivers those lingering hot days ideal for enjoying outdoor activities. However, as the days grow shorter, temperatures can dip down to a chilly -1°C, creating a notable contrast that differentiates September from the balmy summer months. Rainfall also makes an appearance, with 89 mm over about 11 days, adding a refreshing touch to the landscape while boosting humidity levels to 81%. This vibrant mix of warmth and coolness makes September a unique time to experience Stratford's changing climate. For more insights, visit Stratford Climate.