Last updated: February 24, 2025
In September, Columbia, United States experiences a diverse range of weather, with maximum temperatures soaring up to 40°C (105°F) and averaging around 22°C (72°F). The month welcomes a refreshing shift as temperatures dip to a pleasant minimum of 7°C (45°F) during cooler nights. Despite an overall dry climate, precipitation is limited, accumulating only 4 mm (0.2 in) across just one day. Humidity levels stand at a moderate 55%, adding to the month’s intriguing weather dynamics, making it a fascinating time for both residents and visitors to explore the seasonal transitions.
In September, temperatures in Columbia, United States transition from the sweltering summer heat to the crispness of autumn. With a minimum of 7°C (45°F) and an average of 22°C (72°F), residents enjoy a mild climate that provides a pleasant backdrop for outdoor activities. Notably, daytime highs reach up to 40°C (105°F), reminding us of the lingering warmth from August. This month marks a clear shift, reflecting a steady decline in average temperatures compared to the preceding summer months, while still retaining some of that late-summer warmth. As fall approaches, the weather begins to hint at the cooler months ahead, setting the stage for vibrant foliage and cozy gatherings.
In September, Columbia experiences a noticeable shift in precipitation patterns, with a modest amount of 4 mm (0.2 in) of rainfall recorded over just 1 day. This marks a stark contrast to the wetter months at the beginning of the year, where precipitation is abundant, peaking in March with 197 mm (7.7 in) across 13 days. After a dry summer with no recorded rainfall in July and August, September's meager rains hint at the transition towards the wetter autumn months. The light drizzle serves as a gentle prelude to the increased precipitation that typically follows in October and November, as Columbia bids farewell to summer and embraces the arrival of cooler, rainier weather.
In September, Columbia experiences a notable shift in humidity, with levels dropping to a comfortable 55%. This marks a continuation of the declining trend initiated during the summer months, where July and August recorded lower humidity levels of 58% and 54%, respectively. As the autumn approaches, residents can enjoy crisper air, contrasting sharply with the high humidity of the earlier months, peaking at 84% in February. The gradual decrease leading into September is indicative of the city’s transition towards a more moderate climate, setting the stage for the upcoming months where humidity again begins to rise, reaching 62% in October. This cyclical pattern highlights how Columbia's weather evolves, allowing for a refreshing change as summer wanes.
As September arrives in Columbia, the UV Index stays robust at 9, categorizing it as very high and indicating that protective measures are essential during outdoor activities. This month marks a slight decrease from the extreme levels of 11 observed in the summer months, but the risk of overexposure remains significant. With a burn time of just 15 minutes, residents and visitors should be mindful of skin protection, especially as the sun's intensity gradually shifts with the changing seasons. The trend of elevated UV levels from late spring through early fall underscores the importance of sun safety practices year-round. For more detailed information on UV exposure in Columbia, visit Columbia UV Index.
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As summer bids farewell, September in Columbia offers a delightful transition with 321 hours of sunshine. This month marks a gentle decline from the peak brightness of July, which boasted a stunning 396 hours. While the light diminishes slightly, September maintains a warm glow, exceeding both October’s 290 hours and the earlier months of the year. The consistent rise in sunlight from January's modest 159 hours to September’s robust total illustrates the region’s embrace of longer days, making this month a beautiful blend of the lingering summer warmth and the upcoming autumn crispness. The gradual decrease in sunshine hours invites a sense of change and anticipation, promising colorful fall foliage and cooler breezes ahead.
As September rolls in, Columbia, United States, enjoys a substantial likelihood of sunny weather, with a notable 89% chance of sunshine lighting up the days. This trend continues the upward progression seen throughout the summer months, peaking at an impressive 96% in August. After the abundant rays of summer, September maintains that warmth and brightness, providing an ideal backdrop for outdoor activities. Although the chance of sun begins to dip in October, the month of September stands out as a delightful time when summer’s glow lingers just a little longer, making it a perfect month for enjoying the fading warmth before autumn takes hold.
As summer transitions into fall, September in Columbia, United States, marks a subtle shift in daylight hours, with the sun gracing the sky for 12 hours each day. This month reflects a gentle decline from the summer peak of 14 hours in June, July, and August, leading us into a more tempered daylight experience. Interestingly, the daylight hours begin their gradual descent, foreshadowing the shorter days of autumn that follow, with October bringing 11 hours and November further narrowing that to 10 hours. This trend highlights the cyclical nature of seasons, where the warmth and brightness of summer gracefully yield to the crispness and coziness of fall.
As September arrives in Columbia, United States, the average wind speed holds steady at 2.3 m/s (5 mph), mirroring the calm breezes of the preceding months. This consistency underscores a broader trend throughout the year, where wind speeds remain relatively moderate, fluctuating only slightly. From the mild winds in the earlier months to a small uptick to 2.6 m/s (6 mph) in May, these gentle currents create a serene backdrop that is characteristic of Columbia's fall transition. Interestingly, as summer fades, September maintains these placid conditions, hinting at a smooth shift into autumn with wind patterns that continue to retain their peaceful charm.
The weather in Columbia 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 Columbia and find detailed weather information for every month.
September typically offers a much warmer and drier climate compared to January. With average temperatures hovering around 22°C (72°F) and maximums that can reach as high as 40°C (105°F), September is characterized by its mild evenings, with lows of 7°C (45°F). In contrast, January brings a significant drop in temperatures, with averages around 8°C (46°F) and lows dipping to -6°C (22°F), necessitating warmer clothing. Furthermore, January experiences a considerable increase in precipitation, with 183 mm (7.2 in) of rain over 8 days, compared to just 4 mm (0.2 in) on a single day in September. The humidity also rises in January, reaching 82%, compared to September's 55%. For more details on Columbia's winter weather, visit Columbia weather in January.
In contrast to September, which boasts an average temperature of 22°C (72°F) and allows for warm days with highs reaching up to 40°C (105°F), February presents a much cooler climate with an average of 8°C (47°F) and maximum temperatures peaking at 24°C (75°F). While September is relatively dry with only 4 mm of precipitation over just one day, February experiences significantly more rain, totaling 180 mm over nine days, contributing to a noticeably higher humidity level of 84%. For more insights into the weather conditions during this month, you can refer to Columbia weather in February.
When comparing the weather in September and March, we see striking contrasts. September typically enjoys warmer temperatures, ranging from a minimum of 7°C (45°F) to a maximum of 40°C (105°F), with an average of 22°C (72°F) and very little precipitation at only 4 mm (0.2 in) over just one day. The humidity during this time is moderate at 55%. In contrast, March presents a cooler climate, with minimum temperatures dropping to -2°C (28°F) and maximums reaching 27°C (80°F), averaging around 10°C (51°F). This month is significantly wetter, with precipitation totaling 197 mm (7.7 in) spread over 13 days, resulting in a higher humidity level of 82%. For those interested in details about March weather, more information can be found at Columbia weather in March.
When comparing the weather in September and April, distinct differences emerge. September typically boasts a warm average temperature of 22°C (72°F), with maximum highs reaching up to 40°C (105°F) and minimal precipitation of only 4 mm over a single day. In contrast, April features a cooler average temperature of 14°C (57°F), with nighttime lows dipping to -1°C (31°F) and maximums around 30°C (87°F). Notably, April experiences significantly higher rainfall, totaling 83 mm across six days, and an increase in humidity at 78%. This contrast highlights September's dry and hot conditions versus April's cooler, wetter climate. For those looking for more detailed weather insights, visit Columbia weather in April.
Comparing the weather in September and May reveals notable differences in temperature and precipitation. September typically enjoys a warmer range, with minimum temperatures of 7°C (45°F) and average highs reaching up to 40°C (105°F), while May starts cooler, with minimums around 3°C (37°F) and a maximum of 35°C (94°F). Additionally, September experiences minimal rainfall, averaging just 4 mm (0.2 in) over about one day, while May sees significantly more precipitation, totaling 49 mm (1.9 in) over five days. Humidity also varies, with September at 55% compared to May's higher level of 71%. For more details on May weather in Columbia, visit Columbia weather in May.
In September, temperatures generally range from a minimum of 7°C (45°F) to a maximum of 40°C (105°F), leading to an average of 22°C (72°F). The month experiences minimal precipitation with only 4 mm (0.2 in) over just 1 day, and humidity levels are around 55%. In contrast, June has a slightly warmer minimum temperature of 8°C (46°F) and similar average temperatures of 22°C (73°F), with a maximum of 39°C (103°F). Precipitation also remains low in June, at 4 mm (0.1 in) over 1 day, but humidity is higher, reaching 64%. This means that while both months share similar average temperatures and low precipitation, June tends to feel a bit more humid than September. For more details on June weather, you can visit Columbia weather in June.
In comparing the weather between September and July, September showcases a broader temperature range, with minimums dipping to 7°C (45°F) and maximums reaching 40°C (105°F), while July has a warmer minimum of 13°C (55°F) and a maximum of 39°C (103°F). Both months experience relatively low precipitation, but September sees a slight increase with 4 mm (0.2 in) over just one day of rain, as opposed to the completely dry July, which records 0 mm (0.0 in) of precipitation over the entire month. Humidity levels are slightly lower in September at 55%, compared to 58% in July. For a detailed look at July weather, you can visit Columbia weather in July.
In comparing the weather between September and August, one notable difference is the drop in minimum temperatures, with September starting at a cooler 7°C (45°F) compared to August's 12°C (54°F). However, both months reach the same maximum temperature of 40°C (105°F), indicating a consistent peak heat. The average temperature in September is slightly lower at 22°C (72°F) than August's 25°C (78°F). Additionally, September sees a small amount of precipitation with 4 mm over 1 day, while August remains completely dry with no recorded rain. Humidity levels are quite similar, with September at 55% and August slightly lower at 54%. For more detailed weather information about August, you can refer to Columbia weather in August.
September and October offer distinct weather experiences. September boasts warmer temperatures, with an average high of 22°C (72°F) and peaks reaching up to 40°C (105°F), while October sees a notable drop, averaging 16°C (62°F) and maxing out at 34°C (93°F). Precipitation increases significantly in October, from just 4 mm (0.2 in) in September to 44 mm (1.7 in), and the number of rainy days rises from 1 to 2. Additionally, humidity levels are slightly higher in October at 62%, compared to 55% in September. For more insights on October weather, check out Columbia weather in October.
In comparing the weather between September and November, a stark contrast emerges. September boasts warmer temperatures, with an average high of 22°C (72°F) and a maximum reaching up to 40°C (105°F). It experiences minimal precipitation, only about 4 mm (0.2 in) over just one day, accompanied by a moderate humidity level of 55%. In contrast, November sees a significant drop in temperatures, with an average of 11°C (52°F) and lows dipping to -1°C (30°F). This month is much wetter, receiving 89 mm (3.5 in) of rain across six days, and the humidity rises to 78%. For more details on the weather specifics in November, you can visit Columbia weather in November.
September and December present drastically different weather patterns. In September, temperatures range from a mild 7°C (45°F) to a scorching 40°C (105°F), with an average of 22°C (72°F) and minimal precipitation of just 4 mm (0.2 in) over a single day, creating a relatively dry atmosphere with 55% humidity. In contrast, December sees significantly cooler temperatures, with lows dipping to -2°C (28°F) and a much more moderate maximum of 22°C (72°F). The average temperature for December hovers around 8°C (46°F) and the month experiences substantial rainfall, totaling 148 mm (5.8 in) over approximately nine days, paired with increased humidity of 80%. For more details on December weather, you can visit Columbia weather in December.
As summer gives way to autumn, Columbia's September weather presents a delightful transition characterized by mild temperatures and low precipitation. In comparison to the scorching highs often experienced during the peak of summer, September brings a more comfortable warmth, with average temperatures making outdoor activities enjoyable. The month typically sees a refreshing dip in humidity, allowing for pleasant evenings under the stars. With only a minimal amount of rain and just a single rainy day, it's a great time to explore the beauty of Columbia. For a comprehensive look at what to expect throughout the year, visit Columbia Climate.