Last updated: February 24, 2025
October in St. Louis, United States, showcases a vibrant transition into autumn with temperatures fluctuating between a maximum of 34°C (93°F) and a minimum of -4°C (26°F), resulting in an average of 15°C (59°F). This month experiences significant precipitation, totaling 105 mm (4.1 in) over approximately 11 days, contributing to a humidity level of 76%. These weather patterns create a dynamic and engaging environment, perfect for enjoying the rich tapestry of fall foliage and outdoor activities in the Gateway City.
In October, St. Louis experiences a notable shift as the city transitions from the warmth of summer to the crispness of autumn. The average temperature settles at a refreshing 15°C (59°F), with nighttime lows dipping to around -4°C (26°F). This significant change is accompanied by pleasantly warm daytime highs that can reach up to 34°C (93°F), showcasing the tail end of summer's warmth. As the month progresses, the contrast between the warm afternoons and cool nights offers a beautiful canvas of fall colors and the perfect backdrop for outdoor activities. Despite the drop in temperatures compared to September, October still provides a delightful mix of warmth and chill, making it a perfect time to enjoy the season's vibrant scenery.
In October, St. Louis experiences a significant uptick in precipitation, averaging 105 mm (4.1 in) over approximately 11 days of rain. This monthly total marks a noticeable increase from the drier conditions seen in September, which only recorded 56 mm (2.2 in). The trend towards wetter weather continues through the fall, with October's rainfall contributing to the overall average that peaks in late spring. This transition not only rejuvenates the landscape with vibrant autumn colors but also sets the stage for approaching winter, as the city starts to prepare for the colder months ahead. The consistent rainfall during this time underscores the importance of October in St. Louis’s climatic cycle, bridging the gap between the warmer and harsher seasons.
In October, St. Louis experiences a notable shift in humidity, with levels dropping to 76%, reflecting a gradual retreat from the summer's oppressiveness. This month marks one of the lowest points in humidity levels throughout the year, aligning closely with September's figures. After the peak 83% during the sweltering summer months of June and July, the city begins to embrace the crisp, fall air. As the year progresses, humidity consistently rises again, culminating in the wetter months of late fall and winter, particularly November and December, where levels soar to 85% and 86%, respectively. This transition signifies the changing seasons and prepares St. Louis for the moisture-laden winter months ahead.
As October rolls around in St. Louis, the UV Index dips to 6, marking a transition to the high exposure category, where the risk of harm from unprotected sun exposure increases. Compared to the summer months, where the index peaked at 11 in June, there's a noticeable decline in intensity, allowing for longer burn times of up to 25 minutes. This month serves as a reminder that while summer sunburns might fade, vigilance is still important in the autumn. The overall trend showcases a gradual reduction in UV levels as the seasons shift, emphasizing the importance of sunscreen and protective measures year-round. For detailed insights, check out the full report at St. Louis UV Index.
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As October unfolds in St. Louis, the city experiences a delightful shift, with 239 hours of sunshine illuminating the autumn landscape. Although this marks a decrease from the sun-drenched summer months, it still offers a vibrant backdrop for seasonal festivities. Comparatively, October's sunshine is a notable decline from the peak of 348 hours in July but remains brighter than the winter months that follow, such as January with only 125 hours. This transitional month bridges the gap between the lush, sun-soaked days of summer and the brisk, overcast seasons ahead, allowing residents to savor the crisp air and golden foliage under a warm sun before the year's end.
In St. Louis, October brings a 39% chance of sunny weather, offering a pleasant contrast to the brisk winter months that follow. Notably, this percentage sits below the peak sunshine of September, which enjoys a significant 64% chance, showcasing a transition into the cooler fall season. While October's likelihood of sun is relatively moderate, it still provides more sunshine than the earlier months of the year, especially when compared to the drearier days of January and February, both at just 30%. As fall unfolds, residents can expect a mix of sunny days and crisp air, making October a delightful time to embrace the shifting seasons.
As October unfolds in St. Louis, the city experiences a gentle decline in daylight, offering around 11 hours of sunlight each day. This shift marks a noticeable transition from the long, sun-soaked days of summer, where residents enjoyed up to 14 hours of daylight in June and July. The gradual decrease continues from the peak of May, where daylight reaches its zenith, gradually easing into the crisp autumn months. As daylight hours taper off from September's 12 hours to October's 11 hours, this period invites a cozy atmosphere, perfect for enjoying the vibrant fall foliage. It's a time when the days become shorter, setting the stage for the early evenings that characterize the upcoming winter months.
As October arrives in St. Louis, the breeze begins to shift, bringing an average wind speed of 3.5 m/s (8 mph) that refreshingly contrasts the summer's stagnant air. Following a slight uptick from September’s 3.0 m/s (7 mph), October's winds are reminiscent of earlier spring months, such as April's 3.5 m/s (8 mph), suggesting a seasonal oscillation that prepares the city for the cooler months ahead. This subtle increase underscores the transition from the sparser winds of summer, with July and August recording notably lower averages of 2.1 m/s (5 mph) and 2.4 m/s (5 mph), respectively. As the leaves begin to rustle and autumn sets in, St. Louis experiences a refreshing blend of crisp air and gentle currents, marking the delightful shift from summer's warmth to fall's embrace.
The weather in St. Louis 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 St. Louis and find detailed weather information for every month.
October weather in St. Louis is marked by a more moderate temperature range, with minimums dipping to -4°C (26°F), an average of 15°C (59°F), and maximums reaching up to 34°C (93°F). While the month experiences significant rainfall of 105 mm (4.1 in) over 11 days, the humidity sits at a relatively comfortable 76%. In contrast, January presents a stark change, featuring much colder temperatures with a minimum of -22°C (-7°F) and an average of 0°C (32°F), peaking at 19°C (67°F). Additionally, January brings less rainfall, with only 76 mm (3.0 in) spread over 8 days, yet the humidity is slightly higher at 82%. For a more detailed look at January conditions, visit St. Louis weather in January.
October and February present contrasting weather conditions. In October, temperatures range from a chilly -4°C (26°F) at their lowest to a warm 34°C (93°F) at their peak, with an average temperature of 15°C (59°F). The month sees a significant amount of rainfall, totaling 105 mm (4.1 in) over about 11 days, with humidity levels averaging 76%. In contrast, February experiences much colder temperatures, with minimums plummeting to -19°C (-1°F) and maximums reaching 24°C (76°F). The average temperature in February is a frigid 2°C (35°F). Although February has slightly less rainfall, at 80 mm (3.2 in) over 10 days, the humidity remains high at 80%. For more details on February weather, visit St. Louis weather in February.
October and March present contrasting weather patterns in St. Louis. In October, temperatures range from a chilly -4°C (26°F) at night to a warm average of 15°C (59°F) by day, peaking at a hot 34°C (93°F). The month sees about 105 mm (4.1 in) of precipitation over approximately 11 days, with humidity levels around 76%. In comparison, March starts off much colder, with minimum temperatures reaching -17°C (2°F) and an average of 8°C (47°F), with a maximum of 27°C (81°F). It brings even more precipitation, totaling 131 mm (5.2 in) over 12 days, and slightly higher humidity at 80%. For more details, check out St. Louis weather in March.
In comparing the weather of October and April, we notice some intriguing similarities and differences. Both months experience a minimum temperature of around -4°C (26°F), indicating a chance of chilly nights. In October, the average temperature reaches about 15°C (59°F) with a maximum of 34°C (93°F), while April sees a slightly cooler average of 13°C (55°F) and a maximum of 30°C (87°F). Precipitation is a notable factor in both months, with October registering 105 mm (4.1 in) and April slightly higher at 129 mm (5.1 in). Interestingly, both months feature approximately 11 days of precipitation, but the humidity is marginally higher in April at 80%, compared to October's 76%. For more detailed information, you can refer to St. Louis weather in April.
When comparing the weather in October and May, several notable differences emerge. October experiences cooler temperatures with a minimum of -4°C (26°F) and an average of 15°C (59°F), while May boasts milder conditions, starting at a minimum of 4°C (40°F) and averaging 20°C (68°F). Both months can reach similar maximum temperatures of 34°C (93°F in October and 94°F in May). However, October receives about 105 mm (4.1 in) of precipitation over 11 days, whereas May sees higher rainfall at 145 mm (5.7 in) over 14 days, contributing to a slightly higher humidity level of 82% in May compared to 76% in October. For more detailed information on May's climate, you can check St. Louis weather in May.
October and June offer contrasting weather experiences. In June, temperatures range from a minimum of 12°C (54°F) to a maximum of 36°C (98°F), with an average of 25°C (77°F), making it the warmer month. The humidity is slightly higher in June at 83%, accompanied by a similar level of precipitation at 101 mm (4.0 in) over 11 days. In contrast, October sees colder temperatures, with a minimum of -4°C (26°F) and a maximum of 34°C (93°F), averaging at 15°C (59°F). The humidity in October is lower at 76%, and it experiences slightly more precipitation at 105 mm (4.1 in) over the same number of days. For more detailed information, you can check out St. Louis weather in June.
When comparing the weather in October and July, significant differences emerge. October features a cooler temperature range, with minimums dipping to -4°C (26°F) and a comfortable average of 15°C (59°F), while the maximum can reach 34°C (93°F). In contrast, July's temperatures are notably warmer, with a minimum of 16°C (61°F) and an average of 26°C (80°F), peaking at a sweltering 38°C (101°F). Precipitation levels are slightly higher in October at 105 mm (4.1 in) compared to July’s 97 mm (3.8 in), and both months experience rainfall on about 11 days. Additionally, although October's humidity sits at 76%, July is slightly more humid at 81%, contributing to the muggy summer atmosphere. For more details, you can check out St. Louis weather in July.
In October, the weather experiences a notable shift compared to August. October sees a wider temperature range, with minimums dipping as low as -4°C (26°F) and maximums reaching 34°C (93°F), while August stays warmer with minimums of 12°C (54°F) and a maximum of 35°C (96°F). Precipitation is slightly less in October at 105 mm (4.1 in) compared to August's 130 mm (5.1 in), though both months experience similar numbers of rainy days, with precipitation occurring on 11 days. Additionally, humidity levels are slightly lower in October at 76%, compared to August’s 80%. This overall shift indicates a transition into cooler, more variable weather patterns as fall approaches. For a more detailed look at August weather, visit St. Louis weather in August.
In October, the weather exhibits more variability compared to September, with a minimum temperature dropping to -4°C (26°F) and an average of 15°C (59°F), while September maintains a milder minimum of 7°C (45°F) and a higher average of 22°C (73°F). October also experiences greater precipitation, totaling 105 mm (4.1 in) over 11 days, in contrast to September's 56 mm (2.2 in) across just 7 days. Despite both months featuring a consistent humidity level of 76%, October's cooler temperatures and increased rainfall mark a distinct shift from the warmer, drier conditions of September. For more insights on September's weather, you can refer to St. Louis weather in September.
October and November present a notable shift in weather patterns. In October, temperatures range from a minimum of -4°C (26°F) to a maximum of 34°C (93°F), with an average of 15°C (59°F). The month sees a fair amount of rainfall, totaling 105 mm (4.1 in) over 11 days, and humidity levels average around 76%. In contrast, November brings cooler conditions, with temperatures dropping to a minimum of -13°C (9°F), an average of 7°C (44°F), and a maximum of 25°C (78°F). Precipitation decreases to 75 mm (2.9 in) over 9 days, while humidity rises slightly to 85%. For more details on November weather specifics, you can explore St. Louis weather in November.
In October, temperatures can vary significantly, ranging from a chilly -4°C (26°F) at their lowest to a warm 34°C (93°F) at their peak, with an average of 15°C (59°F). The month experiences about 105 mm (4.1 inches) of precipitation over 11 days, contributing to a humidity level of 76%.
In contrast, December brings much colder weather, with minimum temperatures dropping to -18°C (0°F) and an average of only 4°C (39°F), while the maximum temperature reaches 22°C (71°F). The month sees less rainfall, with 59 mm (2.3 inches) falling over about 7 days, resulting in a higher humidity of 86%.
For more detailed insights, check out St. Louis weather in December.
October in St. Louis presents a striking contrast to the more extremes of summer and winter, transitioning into a season marked by mild temperatures and a notable increase in humidity. While the month begins with warmer days, ideal for outdoor activities, it gradually cools, reminding residents that winter is approaching. With an average temperature hitting a comfortable 15°C (59°F), the risk of chilly nights is accompanied by an increase in precipitation, seen over approximately 11 days. This blend of warmth and moisture gives October a uniquely crisp feel, setting it apart from the sweltering summer heat or the deep winter chills. For more detailed insights on how St. Louis weather evolves throughout the year, check out St. Louis Climate.