Last updated: February 24, 2025
March weather in St. Louis, United States presents a dynamic tapestry of conditions as winter transitions into spring. The average temperature hovers around 8°C (47°F), with peaks reaching a maximum of 27°C (81°F) and the occasional dip to a minimum of -17°C (2°F). This month is characterized by a notable total precipitation of 131 mm (5.2 in), falling over approximately 12 days, contributing to a crisp humidity level of 80%. As the landscape begins to awaken, St. Louis experiences an engaging mix of chilly winds and balmy days, making March a month of transformation and anticipation.
March in St. Louis marks a significant transition as winter's chill begins to wane. With temperatures ranging from a crisp -17°C (2°F) at night to a pleasant 27°C (81°F) during the day, this month showcases the arrival of spring. The average temperature rises to 8°C (47°F), heralding a shift towards warmer days. As nature awakens, you'll notice a notable increase in warmth compared to the biting cold of January and February. This month not only bridges the gap between the harsh winters and the vibrant blooms of April but also entices residents and visitors alike to embrace the budding outdoor activities and fresh beginnings that spring promises.
In March, St. Louis experiences a notable uptick in precipitation, receiving an impressive 131 mm (5.2 in) of rain over 12 days. This marks a significant increase from the previous months, particularly February's 80 mm. The increase in both the amount of rainfall and the number of wet days heralds the arrival of spring, nurturing the vibrant blooms and green landscapes that characterize the season. As winter departs, March often sets the stage for a wet spell, paving the way for a series of rainy days that continue into the warmer months. With April closely following at 129 mm, it’s clear that this period is pivotal for building the moisture levels necessary for a lush and lively spring in the region.
In St. Louis, March experiences a consistent level of humidity at 80%, mirroring the trends seen in both February and April. This steady level suggests a transitional phase in the weather as winter yields to spring, with moisture levels remaining relatively stable during this time. Following March, humidity begins to creep upward into May and June, indicating the onset of warmer and more humid conditions typical of early summer. Interestingly, the humidity levels are generally higher in the cold months, peaking in December at 86%, while the summer months see a slight decrease, with September and October dropping to 76%. This pattern not only highlights the significant shifts in St. Louis's weather but also emphasizes the city's unique climate rhythm throughout the year.
As March rolls in St. Louis, the UV Index begins to climb, reaching a moderate level of 6 and marking the shift to a high exposure category. With a burn time of just 25 minutes, it’s essential for residents to start thinking about sun protection as daylight hours lengthen and temperatures rise. This increase in UV radiation is a precursor to the more intense months ahead; for comparison, April's index skyrockets to 9, and by June, it peaks at 11 in the extreme category. So, whether you’re planning a stroll in the park or a weekend adventure, stay informed and protected. For detailed information, visit St. Louis UV Index.
UV Risk Categories
As spring arrives in St. Louis, March bursts forth with an impressive 205 hours of sunshine, signaling a delightful transition from the colder winter months. This increase from February's 174 hours showcases the gradual awakening of nature, inviting residents and visitors alike to bask in the warming rays. The trend continues upwards as the city anticipates even sunnier days ahead, with April’s forecasted 241 hours promising a vibrant and lively atmosphere. Such growth in daylight not only enhances the beauty of St. Louis but also encourages outdoor activities and community gatherings, making March a pivotal moment in the yearly cycle of sunshine.
As March rolls into St. Louis, the likelihood of sunny weather begins to brighten the atmosphere, with a 44% chance of sun, a significant increase compared to the chilly winter months of January and February, each at just 30%. This upward trend continues into April, where the sun shines even more frequently at 49%, setting the stage for the vibrant blooms of spring. Interestingly, while May dips to 26%, the sunny days make a comeback in the summer months, peaking at 51% in July. Overall, March serves as a transitional month, hinting at the sunny promise of the seasons to come.
As winter fades and spring begins, March in St. Louis brings a refreshing increase in daylight, with a total of 11 hours of sunshine illuminating the city's vibrant landscapes. This upward trend in daylight hours marks a significant change from the shorter days of January and February, as the days noticeably lengthen. Following March, the growth continues into April and May, where daylight extends to 13 and 14 hours, respectively. This progression not only heralds the arrival of warmer weather but also invites residents to enjoy longer evenings filled with outdoor activities. The shift from mere introspection in winter to the exuberance of spring is beautifully captured in this gradual elongation of daylight, setting the stage for the sun-drenched days ahead.
As March unfolds in St. Louis, the winds begin to pick up, averaging 3.8 m/s (9 mph), a noticeable increase from the more placid breezes of January and February. This slight uptick not only heralds the arrival of spring but also sets the stage for a transitional season, as wind speeds gradually decline into warmer months. Interestingly, compared to April's 3.5 m/s (8 mph), March stands out as a month where nature seems to stir with renewed energy, hinting at warmer days ahead. The gradual descent in wind speeds throughout the summer, peaking in July at a gentle 2.1 m/s (5 mph), ultimately creates a calm backdrop for the vibrant life that blossoms in the city. Overall, March acts as a pivotal moment in the year, where the fresh spring winds invite a sense of renewal and anticipation.
The weather in St. Louis changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of March'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.
When comparing the weather in March to that in January, it's evident that March experiences milder temperatures, with an average of 8°C (47°F) compared to January's chillier average of 0°C (32°F). While January sees minimum temperatures drop to -22°C (-7°F), March's lowest recorded temperature is a comparatively warmer -17°C (2°F). Precipitation levels are higher in March, totaling 131 mm (5.2 in) over 12 days, versus January's 76 mm (3.0 in) spread across 8 days. Both months exhibit similar humidity levels, with January at 82% and March at 80%. For a closer look at how January weather impacts the area, you can check St. Louis weather in January.
March typically experiences a significant temperature increase compared to February, with average temperatures rising from 2°C (35°F) in February to 8°C (47°F) in March. While both months have similar humidity levels at 80%, March sees higher maximum temperatures reaching up to 27°C (81°F), compared to February's max of 24°C (76°F). Additionally, March is wetter, receiving 131 mm (5.2 in) of precipitation over 12 days, whereas February has only 80 mm (3.2 in) over 10 days. For more details, you can check St. Louis weather in February.
March and April exhibit notable shifts in weather patterns. In March, temperatures range from a chilly minimum of -17°C (2°F) to an average of 8°C (47°F), with highs reaching up to 27°C (81°F). The month experiences approximately 131 mm (5.2 in) of precipitation over 12 days, maintaining a high humidity level of 80%. In contrast, April brings a milder climate, with a minimum temperature of -4°C (24°F) and an average of 13°C (55°F), peaking at 30°C (87°F). Additionally, April sees a slight decrease in precipitation, totaling 129 mm (5.1 in) over 11 days, yet humidity remains steady at 80%. For more detailed insights into April's weather, visit St. Louis weather in April.
March and May exhibit notable differences in weather patterns. In March, temperatures range from a chilling minimum of -17°C (2°F) to a maximum of 27°C (81°F), with an average of 8°C (47°F). This month also experiences significant precipitation, totaling 131 mm (5.2 in) over about 12 days, accompanied by a humidity level of 80%.
In contrast, May sees a more moderate temperature range, with a minimum of 4°C (40°F) and a maximum of 34°C (94°F), leading to a higher average of 20°C (68°F). Precipitation increases slightly to 145 mm (5.7 in) across 14 days, with humidity remaining high at 82%. For more detailed information, you can explore St. Louis weather in May.
In March, the weather exhibits a wide variation in temperatures, with a minimum of -17°C (2°F) and a maximum of 27°C (81°F), resulting in an average of 8°C (47°F). This month experiences significant precipitation, totaling 131 mm (5.2 in) over 12 days, alongside a humidity level of 80%. In contrast, June brings much warmer temperatures, with a minimum of 12°C (54°F) and a maximum reaching 36°C (98°F), averaging around 25°C (77°F). Although June has slightly less precipitation at 101 mm (4.0 in) over 11 days, the humidity remains high at 83%. For more information, check out St. Louis weather in June.
The weather in March and July showcases significant differences in temperature, precipitation, and overall climate conditions. March sees a wide temperature range, with a minimum of -17°C (2°F) and a maximum of 27°C (81°F), averaging around 8°C (47°F). In contrast, July features much warmer weather, with temperatures ranging from a minimum of 16°C (61°F) to a scorching maximum of 38°C (101°F), averaging 26°C (80°F). Precipitation levels also differ, with March receiving 131 mm (5.2 in) over 12 days, while July has a slightly lower total of 97 mm (3.8 in) across 11 days. Humidity levels are comparable, hovering around 80% for both months, but the overall feel is markedly different, making March's cool, variable climate a stark contrast to July's hot and humid conditions. For more detailed information, check out St. Louis weather in July.
March and August present contrasting yet somewhat comparable weather patterns. In March, temperatures fluctuate from a frigid minimum of -17°C (2°F) to a more pleasant average of 8°C (47°F), peaking at a warm 27°C (81°F). The month also experiences significant precipitation, totaling 131 mm (5.2 in) over approximately 12 days, coinciding with a high humidity level of 80%. Conversely, August offers a much milder climate, with minimum temperatures at 12°C (54°F) and an average of 25°C (76°F), reaching a maximum of 35°C (96°F). Despite similar levels of precipitation at 130 mm (5.1 in) across 11 days, the humidity remains constant at 80%. For more insights on the weather patterns, feel free to check St. Louis weather in August.
March and September present distinct contrasts in weather patterns. In March, temperatures range significantly, with a minimum of -17°C (2°F) and an average of 8°C (47°F), reaching a maximum of 27°C (81°F). This month experiences higher precipitation, totaling 131 mm (5.2 in) over about 12 days, and maintains a humidity level of 80%. In contrast, September boasts a milder climate, with temperatures starting at a minimum of 7°C (45°F), averaging 22°C (73°F), and peaking at 35°C (95°F). Precipitation is notably lower, at 56 mm (2.2 in) over just 7 days, and humidity slightly decreases to 76%. For more details on September's weather, check St. Louis weather in September.
When comparing March and October, it's evident that both months exhibit quite distinct weather characteristics. March experiences a wider temperature range, with minimums plunging to -17°C and maximums reaching up to 27°C. In contrast, October tends to be milder, with nighttime lows of -4°C and highs capping at 34°C. Precipitation also plays a role, with March receiving a bit more—131 mm over 12 days—compared to October's 105 mm over 11 days. Humidity levels are relatively similar, with March at 80% and October slightly lower at 76%. For more insights into the conditions in October, check out St. Louis weather in October.
March and November present contrasting but mild weather patterns, both reflecting the transitional seasons. In March, temperatures range from a chilly minimum of -17°C (2°F) to a maximum of 27°C (81°F), with an average of 8°C (47°F) and a higher precipitation level of 131 mm (5.2 in) over 12 days. The humidity is relatively stable at 80%. Conversely, November features a slightly warmer minimum of -13°C (9°F) and a maximum of 25°C (78°F), with an average temperature of 7°C (44°F), and experiences less precipitation at 75 mm (2.9 in) over 9 days. The humidity increases to 85%, making November feel a bit damp. For a detailed overview of November weather, check out St. Louis weather in November.
March weather features a broader range of temperatures compared to December, with minimums dropping to -17°C (2°F) and maximums peaking at a mild 27°C (81°F). The average temperature in March is a more comfortable 8°C (47°F), along with higher precipitation levels at 131 mm (5.2 in) spread over 12 days and a humidity level of 80%. In contrast, December's coldest temperature can reach -18°C (0°F), with an average of 4°C (39°F) and a maximum of 22°C (71°F). December sees significantly less precipitation at 59 mm (2.3 in) over 7 days, accompanied by a slightly higher humidity of 86%. For more insights, check out St. Louis weather in December.
March in St. Louis marks a significant transition from the cold grip of winter to the budding warmth of spring. Average temperatures start to rise, with fluctuations from brisk chilly days to surprisingly warm spells. This month often ushers in a mix of rain and humidity—131 mm of precipitation over about 12 days can make it one of the wetter periods as the region shakes off its wintry layers. Compared to the harsher cold of January and February, March's weather offers a refreshing blend of potential sunshine and lingering coolness, creating an invigorating atmosphere as nature awakens. For a deeper understanding of the overall climate trends in St. Louis, visit St. Louis Climate.