September Weather in Jasper, United States

Last updated: February 24, 2025

In September, Jasper, United States experiences a delightful mix of temperatures that makes it a unique time of year. With maximum highs reaching 34°C (93°F) and a pleasant average of 23°C (73°F), the days are warm and inviting. However, cooler evenings can surprise with lows dipping to 9°C (49°F). This month also witnesses 111 mm (4.4 in) of rainfall over approximately 10 days, contributing to a humid atmosphere with an average humidity of 76%. Visitors can enjoy the vibrant fall foliage while being prepared for occasional showers, making September a captivating blend of warmth and refreshing rainfall.

September Temperature in Jasper

As September rolls in, Jasper, United States, experiences a gentle transition from summer to autumn. The minimum temperature settles around 9°C (49°F), providing a crisp start to the month, while the average temperature hovers at a pleasant 23°C (73°F), perfect for outdoor activities. With a maximum temperature peaking at 34°C (93°F), the early weeks of September still carry the warmth of summer, inviting locals and visitors alike to enjoy the lingering sunshine. This month is characterized by a gradual cooling trend, foreshadowing the cooler days of fall, making it a lovely time to experience Jasper’s natural beauty before winter takes hold.

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

The chart illustrates September temperature patterns in Jasper, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434854606974777673645046
Data source: Temperature data for Jasper 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.

September Precipitation in Jasper

In September, Jasper experiences a noticeable drop in precipitation, receiving 111 mm (4.4 in) of rain over just 10 days. This marks a shift from the wetter summer months, where rainfall peaked in August with 147 mm (5.8 in) across 18 days. The gradual decline in precipitation this month signals the onset of fall, as temperatures cool and the region transitions toward drier conditions. With September's rainfall representing one of the lower totals of the year, it's a welcome reprieve from the moisture-laden summer, paving the way for the crisp, clear days of October ahead.

September Precipitation Trends in Jasper

The chart displays monthly precipitation patterns in Jasper, 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.
JanFebMarAprMayJunJulAugSepOctNovDec12919816514712213512214711114495155
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Jasper

September in Jasper, United States, marks the end of summer's warmth, bringing a notable drop in humidity to 76%. This shift mirrors a broader trend observed throughout the year, where humidity levels peak in the coldest months, January and February, at a high 86%. As the seasons transition, a gradual decrease occurs, with summer months, particularly August, showcasing the lowest levels before the start of autumn. The slight uptick in October's humidity to 80% hints at the impending chill, as the air begins to feel crisper and more refreshing. Overall, September serves as a bridge between the humid summer and the cooler, drier months ahead, making it a unique time in Jasper's climate cycle.

September Average Humidity in Jasper

This chart illustrates the average monthly humidity levels in Jasper, 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.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jasper

As summer fades into autumn, September in Jasper, United States, presents a very high UV Index of 9, indicating a significant risk of harm from unprotected sun exposure. With a burn time of just 15 minutes, it’s crucial to remain vigilant about sun safety during this transition month. Following the peak of extreme UV levels throughout June and July, the slight decrease in the index signals a shift, yet care is still essential. This trend of high UV levels persists into October before tapering off in November, where the index reduces to 6, categorized as high. For those planning to enjoy the outdoors in September, visiting the sun safety guidelines can be beneficial. Explore more at Jasper UV Index.

Maximum UV Index Levels in Jasper for September

The chart shows the monthly maximum UV Index (UVI) for Jasper 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.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111109864
Data source: Jasper 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 Jasper

September in Jasper, United States, offers a splendid embrace of sunshine, with an impressive 293 hours of glorious daylight. As summer transitions to fall, the daylight hours begin to dwindle from the peak seen in July, which boasts a remarkable 336 hours. However, September continues to bask in abundant sunlight, slightly trailing behind August’s 312 hours. This month stands out not only for its warm days but also as a precursor to the cozy autumn vibes of October, where daylight significantly reduces to 263 hours. The gradual decline in sunshine hours from the vibrant summer months signals the change of seasons, inviting residents and visitors alike to relish the beautiful, sun-drenched days of early fall.

Monthly Sunshine Duration in Jasper: September Highlighted

The September sunshine duration represents the total number of hours Jasper 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.
JanFebMarAprMayJunJulAugSepOctNovDec163h163h233h272h306h311h336h312h293h263h237h186h
Data source: Jasper September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Jasper During September

In September, Jasper enjoys a notable increase in sunny weather, with a 47% chance of sunshine compared to the summer months that hover below 40%. This uplift in clear skies marks a shift from the colder months, where chances range between 32% and 38%. As summer gives way to autumn, September's weather provides a pleasant balance—offering a brighter landscape for outdoor activities. The transition from the relatively dim skies of August to September indicates a promising trend towards more favorable and enjoyable sunny days as the season changes.

Percentage of Sunny Days in September in Jasper

The chart illustrates the percentage of sunny days in Jasper 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 Jasper experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec38%40%35%54%32%36%34%33%47%38%61%36%
Data source: Jasper September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Jasper in September

As September arrives in Jasper, the daylight hours begin to wane, offering around 12 hours of sunlight each day. This transition marks a gradual shift from the long, sun-drenched days of summer, with July and June boasting a generous 14 hours of daylight. August still offers a taste of summer's bounty with 13 hours of light, but as the autumn season approaches, daylight starts to decrease steadily. Throughout the year, daylight in Jasper peaks in June and July before descending into shorter days in the fall and winter months, ultimately reaching a mere 9 hours by December. This annual rhythm of daylight not only shapes the local climate but also influences the activities and mood of the community as they prepare for the crisp days of autumn.

Average Daylight Hours in Jasper for September

The chart illustrates the variation in daylight duration in Jasper throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 7m10h 56m11h 59m13h 4m13h 58m14h 24m14h 10m13h 22m12h 20m11h 16m10h 20m9h 52m
Data source: Jasper daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Jasper

As summer fades, September in Jasper brings a gentle shift in the winds, with an average speed of 2.1 m/s (5 mph). This marks a subtle increase from the languid breezes of August, which averaged a mere 1.7 m/s (4 mph). The transition into fall heralds a refreshing change, as wind speeds typically begin to rise again, following a downward trend during the peak summer months. Nature's breath picks up in anticipation of the more dynamic autumnal months ahead, making September a delightful time to experience the area's moderate winds that serve as a prelude to the brisk gusts of October and beyond.

Average September Wind Speed in Jasper

The chart displays monthly wind speed patterns in Jasper, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.93.13.22.82.62.31.71.72.1 m/s2.42.62.7
Data source: Jasper September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Jasper Compares to Other Months

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

September and January display striking contrasts in weather patterns. In September, temperatures range from a mild 9°C (49°F) at night to a warm average of 23°C (73°F), peaking at 34°C (93°F) during the day, accompanied by relatively lower humidity at 76%. The month experiences about 111 mm (4.4 in) of precipitation over roughly 10 days. In contrast, January brings a dramatic drop in temperatures, with nighttime lows plunging to -13°C (9°F) and an average temperature of just 6°C (43°F), while daytime highs reach a more modest 23°C (73°F). This month also has a bit more rain, totaling around 129 mm (5.1 in) over the same number of days, coupled with higher humidity at 86%. For more details on weather conditions in January, you can visit Jasper weather in January.

September and February showcase contrasting weather patterns. In September, temperatures range from a mild 9°C (49°F) at night, peaking at a warm 34°C (93°F) during the day, with an average of 23°C (73°F). The month sees around 111 mm (4.4 in) of precipitation over approximately 10 days, accompanied by a humidity level of 76%.

In stark contrast, February experiences much colder temperatures, with lows dipping to -6°C (21°F) and daytime highs reaching 25°C (78°F). The average temperature settles at a cool 9°C (49°F). This month is also wetter, receiving about 198 mm (7.8 in) of rain over 15 days, with humidity rising to 86%. For a deeper look into Jasper's weather in February, check out this link: Jasper weather in February.

When comparing the weather in September and March, a significant difference in temperatures and precipitation patterns is evident. In September, temperatures range from a mild 9°C (49°F) at night to a warm 34°C (93°F) during the day, with an average of 23°C (73°F). The month experiences 111 mm (4.4 in) of rainfall over approximately 10 days and boasts a humidity level of 76%. In contrast, March sees colder temperatures, starting as low as -5°C (24°F) and peaking at 29°C (84°F), with an average temperature of 12°C (54°F). This month also has higher precipitation at 165 mm (6.5 in) over 14 days, and humidity rises to 86%. For more details, check out Jasper weather in March.

In comparing the weather between September and April, we see notable differences in temperature and precipitation. September tends to be warmer, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 34°C (93°F), while April experiences cooler temperatures, dipping as low as -1°C (31°F) and peaking at 29°C (84°F). While both months receive precipitation on roughly ten days, April sees more rainfall, totaling 147 mm (5.8 in) compared to September's 111 mm (4.4 in). Additionally, April's humidity is slightly higher at 82%, compared to September's 76%. For a more detailed look at the climate during this time, check out Jasper weather in April.

In September, the weather typically features a milder temperature range, with minimums around 9°C (49°F) and average highs of 23°C (73°F), while still reaching maximums of 34°C (93°F). This month experiences substantial rainfall, averaging 111 mm (4.4 in) over about 10 days, alongside a humidity level of 76%. In contrast, May presents cooler minimum temperatures at 2°C (37°F) but maintains a similar maximum of 34°C (93°F), with an average of 21°C (69°F). While May has slightly more precipitation at 122 mm (4.8 in) over 12 days, it is characterized by a higher humidity of 85%. For further details on May's climate, you can explore Jasper weather in May.

In comparing September and June weather, both months experience similar average temperatures, around 23°C (73°F), with maximum temperatures reaching up to 34°C (93°F). However, September tends to have slightly cooler minimum temperatures, dropping to 9°C (49°F), compared to June's minimum of 12°C (54°F). Precipitation levels are higher in June, with a total of 135 mm (5.3 in) spread over 16 days, whereas September receives 111 mm (4.4 in) over just 10 rainy days. Additionally, humidity is higher in June at 85%, while September's humidity sits at 76%. For more detailed information about the climate, you can visit Jasper weather in June.

When comparing the weather in September and July, we see notable differences in temperature and precipitation. September boasts a wider range in temperatures, with a minimum of 9°C (49°F) and a maximum of 34°C (93°F), averaging around 23°C (73°F). In contrast, July offers a warmer experience, with temperatures ranging from a minimum of 15°C (59°F) to a peak of 33°C (93°F) and an average of 25°C (78°F). Precipitation is slightly higher in July, totaling 122 mm (4.8 in) over 17 days compared to September's 111 mm (4.4 in) spread over 10 days. Additionally, humidity levels are higher in July at 83% compared to 76% in September, indicating a more humid experience during the summer month. For those interested in more details, you can find additional information here: Jasper weather in July.

In comparing the weather between August and September, we observe notable differences in temperature and precipitation patterns. August tends to have a warmer temperature range, with a minimum of 15°C (60°F) and an average of 25°C (77°F), while September experiences cooler nights with a minimum of 9°C (49°F). The maximum temperatures are relatively similar, with August reaching 33°C (92°F) and September peaking at 34°C (93°F). In terms of rainfall, September sees less precipitation at 111 mm (4.4 in) over 10 days compared to August's 147 mm (5.8 in) across 18 days. Despite the variations in temperature and precipitation, both months share the same humidity level of 76%. For a more detailed look at the weather statistics for August, you can check this link: Jasper weather in August.

In September, temperatures range from a minimum of 9°C (49°F) to a warm maximum of 34°C (93°F), with an average temperature of 23°C (73°F). The month experiences around 111 mm (4.4 in) of precipitation over 10 days, accompanied by a humidity level of 76%. In contrast, October brings a notable shift in climate, with temperatures dipping to a minimum of -1°C (30°F) and an average of 18°C (64°F), while the maximum can reach 35°C (96°F). Rainfall increases slightly to 144 mm (5.7 in) over the same number of days, and humidity rises to 80%. For more detailed insights, check out Jasper weather in October.

September and November present a stark contrast in weather conditions. In September, temperatures range from a comfortable minimum of 9°C (49°F) to a warm maximum of 34°C (93°F), with an average of 23°C (73°F). The humidity is relatively high at 76%, and the month experiences about 111 mm (4.4 in) of precipitation over 10 days. In contrast, November ushers in cooler temperatures, with a minimum dipping to -6°C (21°F) and an average of only 10°C (51°F), though it can still reach up to 24°C (76°F). The humidity increases to 88%, and precipitation slightly decreases to 95 mm (3.7 in) over 9 days. For more specifics on the weather during this time, check out Jasper weather in November.

September and December showcase contrasting weather patterns. In September, temperatures range from a mild 9°C (49°F) at night to a warm average of 23°C (73°F) during the day, peaking at 34°C (93°F). With 111 mm (4.4 in) of rainfall over about 10 days, humidity sits at 76%, creating a balmy atmosphere. Conversely, December brings a chillier climate, with temperatures dropping to a minimum of -8°C (18°F) and averaging only 8°C (46°F), while the maximum reaches 22°C (72°F). Precipitation increases to 155 mm (6.1 in) over approximately 12 days, accompanied by higher humidity levels at 88%. For more details on December's weather, visit Jasper weather in December.

Compare Jasper's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Jasper

September in Jasper marks a transition into the cooler months, with comfortable average temperatures that hint at the changing season. While warm days can still reach into the low 30s°C, the nights bring a refreshing coolness that contrasts sharply with the heat of summer. Precipitation becomes more frequent, with about a third of the month experiencing rain, leading to a noticeable increase in humidity. This month serves as a reminder of nature’s rhythm, as Jasper begins to trade its summer warmth for the crispness of autumn. For more details on climate patterns throughout the year, visit Jasper Climate.