Last updated: February 26, 2025
In Saint-Malo, France, September unveils a tapestry of varied weather, with maximum temperatures reaching a pleasant 25°C (78°F) and an average hovering around 17°C (63°F). The crisp mornings bring a refreshing minimum of 12°C (53°F), perfect for leisurely strolls along the historic coast. This month also sees approximately 86 mm (3.4 in) of rainfall over 11 days, contributing to the area's lush greenery. With an ambient humidity level of 79%, visitors can expect a mix of sunshine and gentle coastal breezes, making September an inviting time to explore this charming seaside town.
In September, Saint-Malo embraces the lingering warmth of summer, with temperatures ranging from a comfortable 12°C (53°F) at night to a pleasant 25°C (78°F) during the day. The average temperature settles around 17°C (63°F), making it an ideal time for outdoor exploration of the city's historic sites and beautiful coastline. As autumn approaches, the days gradually begin to cool, yet September retains a certain vibrancy reminiscent of the summer months. This transitional period offers visitors a delightful blend of warm days and crisp evenings, perfect for savoring the local cuisine al fresco. As the month progresses, September sets the stage for the seasonal shift, allowing travelers to enjoy the last of the summer warmth while preparing for the cooler days ahead.
September in Saint-Malo sees a notable transition in weather, as the summer warmth gives way to the cooler embrace of autumn. With precipitation amounting to 86 mm (3.4 in) over 11 rainy days, it ranks among the wetter months, slightly less than October, which is notable for its 140 mm (5.5 in). This increase in rainfall follows the summer’s more temperate 63 mm in August, hinting at the onset of the wetter season ahead. The frequency of rain remains consistent with the preceding months, suggesting a slow but steady shift in weather patterns as the year progresses. Visitors and locals alike should prepare for the dynamic weather, making September a month of both change and beauty in this charming coastal town.
In September, Saint-Malo experiences a moderate humidity level of 79%, making it a transition month as summer gives way to autumn. This figure reflects a slight increase from the lower 69% in July and 73% in August, indicating the lingering warmth of late summer. As the year progresses into the autumn months, humidity levels are expected to rise significantly, peaking at 92% in both November and December. The general trend shows a gradual decrease in humidity from winter through spring, with the dry summer months providing a welcome respite before the wetter, more humid conditions set in as winter approaches.
As summer fades and September arrives in Saint-Malo, the UV Index begins to decrease, settling at a moderate level of 6. This shift indicates a transition from the peak summer months, which boasted very high UV levels, to a more manageable sun exposure scenario. With a burn time of 25 minutes, it's a reminder to remain vigilant even as the weather cools. The high exposure category highlights the importance of sun protection, particularly during outdoor activities. As daylight hours grow shorter, the UV Index trends downwards approaching autumn, yet the need for skincare remains essential—making it wise to check out the Saint-Malo UV Index for the latest updates.
UV Risk Categories
September in Saint-Malo, France, is a beautiful blend of summer's lingering warmth and the promise of autumn. With 329 hours of sunshine, it marks a gentle decline from the peak of 424 hours in July, illustrating the gradual shift in seasons. The sun continues to shine brightly well into early fall, making September an ideal time to explore the city's stunning beaches and historic architecture. Compared to the earlier months, sunshine in September remains plentiful, significantly richer than January’s 141 hours, and keeps the spirit of summer alive just a little longer. As one strolls along the picturesque coastline, the golden hues of late summer become a bittersweet reminder that winter is on the horizon.
In Saint-Malo, France, September offers a welcoming embrace of sunny weather, with a 44% chance of sunshine—a slight increase from the summer months that typically boast a 41% to 47% likelihood. As the coastal city transitions from the summer's peak, the arrival of autumn brings a mild blend of warmth and light. Observing the trend throughout the year, there’s a gradual steeping from the dismal 23% in January to an encouraging 62% by April, followed by a fluctuating pattern that culminates in September's promising outlook. This month serves as a pleasant bridge between the sunniest days of summer and the overcast spells of autumn, making it an ideal time for visitors to enjoy the stunning coastlines and vibrant cultural experiences that Saint-Malo has to offer.
As summer transitions into autumn, Saint-Malo experiences a noticeable shift in daylight duration. In September, daylight hours decline to an inviting 12 hours, providing a gentle waning from the sunlit months of June and July. The days start to shorten after the vibrant heights of the summer solstice, marking a gradual descent that begins in August with 14 hours of daylight. This pattern reflects the region's seasonal rhythm, where lush, long days give way to the crispness of fall, inviting both locals and visitors to enjoy the mild weather and stunning changes in the landscape before the days retreat further into the colder months of October and November.
As September unfolds in Saint-Malo, France, the coastal breeze softens, with an average wind speed of 5.3 m/s (12 mph), making it one of the calmer months of the year. This gentle wind marks a noticeable decline from the earlier summer months, which boasted slightly stronger gusts, such as 5.9 m/s (13 mph) in August. Following the trend of waning winds, September transitions smoothly into the brisker autumn months, where the wind picks up again, reaching 6.5 m/s (15 mph) in October. This ebb and flow of wind patterns not only shapes the local climate but also creates a serene atmosphere, perfect for leisurely strolls along the picturesque coastline or cozy moments in the charming town, as the summer rush gives way to autumn's tranquility.
The weather in Saint-Malo 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 Saint-Malo and find detailed weather information for every month.
In September, the weather tends to be warmer, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F) and an average of 17°C (63°F). The humidity is relatively high at 79%, and precipitation measures around 86 mm (3.4 in) over approximately 11 days. In contrast, January experiences much cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 14°C (58°F), averaging just 8°C (47°F). The month sees slightly more rainfall, at 88 mm (3.5 in) spread across about 14 days, coupled with a higher humidity level of 90%. For those curious about what to expect during the colder month, you can find more details at Saint-Malo weather in January.
September and February in Saint-Malo present contrasting weather experiences. September typically showcases milder temperatures, with daily averages around 17°C (63°F) and a maximum of 25°C (78°F). The month experiences 86 mm of precipitation over approximately 11 days, coupled with a humidity level of 79%. In contrast, February is much cooler, featuring an average temperature of 8°C (47°F) and highs reaching only 14°C (57°F). This month also sees slightly more precipitation at 90 mm over 15 days, alongside a higher humidity of 89%. For more detailed insights on February weather, you can check Saint-Malo weather in February.
In September, the weather tends to be milder, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F), and an average of 17°C (63°F). The month sees moderate rainfall of 86 mm (3.4 in) over about 11 days, accompanied by a humidity level of 79%. In contrast, March is significantly cooler, with temperatures dropping to a minimum of -2°C (29°F) and peaking at 16°C (60°F), averaging around 9°C (48°F). Precipitation is slightly lower at 70 mm (2.8 in) but occurs over 15 days, contributing to a higher humidity of 86%. For more detailed insights, you can check Saint-Malo weather in March.
When comparing the weather in September and April, significant differences in temperature and precipitation emerge. September boasts a milder climate with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F), making it a generally warmer month with higher averages than April, which sees minimum temperatures around 5°C (42°F) and a maximum of 18°C (64°F). Additionally, September experiences more precipitation at 86 mm (3.4 in) over 11 days, compared to April's 40 mm (1.6 in) over just 8 days. Humidity levels are slightly lower in September at 79%, whereas April maintains a higher humidity at 84%. This overall analysis highlights a transition from the warmth of late summer to the cooler, wetter conditions of early spring. For more specific details on April weather, visit Saint-Malo weather in April.
In comparing the weather of September and May, September tends to be warmer, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F). In contrast, May sees cooler temperatures, with an average of 8°C (46°F) to a maximum of 21°C (71°F). Precipitation is higher in September, totaling 86 mm (3.4 in) over 11 days, compared to May's 67 mm (2.6 in) over the same number of days. Humidity remains relatively consistent, with September at 79% and May slightly higher at 80%. For more details, you can check Saint-Malo weather in May.
In comparing the weather of September and June, we observe a few notable differences. September generally experiences slightly warmer temperatures, with average highs reaching 25°C (78°F) compared to June's maximum of 27°C (80°F). However, June tends to be milder overall, with a lower average temperature of 16°C (61°F) compared to September's 17°C (63°F). Both months see relatively similar levels of precipitation, with September receiving 86 mm (3.4 in) and June slightly less at 74 mm (2.9 in), though they share the same number of rainy days at 11. Interestingly, humidity levels remain nearly identical, contributing to a consistently damp feel in both months. For a closer look at June's weather patterns, check out Saint-Malo weather in June.
In comparing the weather between September and July, we can observe distinct differences. September tends to be slightly cooler, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F), while July is warmer, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 28°C (83°F). Additionally, September experiences higher precipitation, totaling 86 mm (3.4 in) over 11 wet days, compared to July’s 46 mm (1.8 in) over 9 days. Humidity levels are also higher in September at 79%, compared to July’s 69%, contributing to a more humid feel as summer transitions into autumn. For more detailed insights, you can check Saint-Malo weather in July.
In comparing the weather patterns of September and August, September tends to be slightly cooler, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F), while August features slightly warmer temperatures, with a minimum of 14°C (57°F) and an average of 18°C (65°F). Both months experience 11 days of precipitation, but September sees a significant increase in rainfall, accumulating 86 mm (3.4 in) compared to August's 63 mm (2.5 in). Additionally, the humidity in September is higher at 79%, compared to August’s 73%. For more details on August weather, you can explore Saint-Malo weather in August.
In September, the weather features milder temperatures, with a minimum of 12°C (53°F) and an average of 17°C (63°F), while the maximum can reach up to 25°C (78°F). This month experiences moderate precipitation of 86 mm (3.4 in) over 11 days, with a humidity level of 79%. In contrast, October brings cooler temperatures, with a minimum of 8°C (47°F) and an average of 15°C (59°F), peaking at a maximum of 21°C (71°F). The rainfall increases significantly to 140 mm (5.5 in), spread over 17 days, and the humidity rises to 89%. For a detailed look at October weather in Saint-Malo, visit Saint-Malo weather in October.
In September, the weather tends to be milder, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (78°F). The month experiences relatively less precipitation, totaling 86 mm (3.4 in) over about 11 days, along with a humidity level of 79%. In contrast, November brings cooler temperatures, with an average of 11°C (53°F) and a drop in maximums to 17°C (63°F). It also sees increased precipitation, reaching 122 mm (4.8 in) over 16 days, and higher humidity at 92%. For more specifics on November conditions, you can refer to Saint-Malo weather in November.
September and December showcase a striking contrast in weather conditions. In September, temperatures range from a mild 12°C (53°F) at night to a pleasant maximum of 25°C (78°F) during the day, with an average of 17°C (63°F). The month experiences 86 mm (3.4 in) of precipitation over approximately 11 days, accompanied by a humidity level of 79%.
In contrast, December brings a significant drop in temperatures, with minimums dipping to 3°C (37°F), average temperatures around 9°C (49°F), and maximums reaching only 14°C (57°F). This month is wetter, seeing 164 mm (6.4 in) of precipitation across about 20 days, along with increased humidity at 92%. For more detailed insights on December weather, visit Saint-Malo weather in December.
As summer transitions to autumn, September in Saint-Malo brings a noticeable shift in weather. While daytime temperatures still offer warmth, averaging around 17°C, the evenings can feel cooler, hinting at the approaching fall. Humidity levels remain fairly high, and residents should be prepared for occasional rain, with about 11 days of precipitation throughout the month. This is a stark contrast to the drier summer months, as September sees a surge in moisture with a total of 86 mm of rainfall. September is indeed a time of transformation, blending the lingering vibrance of summer with the refreshing crispness of autumn. For more insights into what to expect, check out Saint-Malo Climate.