Last updated: February 26, 2025
Experience the September weather in Blois, France, where daily temperatures can soar to a maximum of 36°C (97°F), while the average hovers around 18°C (64°F). Nights can get cool, dipping to a minimum of 5°C (41°F), offering a refreshing contrast to the warmth of the day. Although the month sees 39 mm (1.5 in) of precipitation over about 7 days, the overall ambiance remains pleasant, with humidity levels reaching 76%. Embrace the vibrant autumn transition in this charming Loire Valley town, a time when crisp air and rich cultural heritage await at every turn.
In September, Blois experiences a delightful shift as summer begins to gracefully transition into autumn. With average temperatures settling around 18°C (64°F), the coolness of the mornings and evenings complements the warmer afternoons, where highs can reach an impressive 36°C (97°F). This month marks a noticeable drop from the intense summer heat yet retains warmth, creating an inviting atmosphere for outdoor activities. As the minimum temperature hovers at a mild 5°C (41°F), the scenery becomes adorned with the rich hues of fall, making September an enchanting time to explore Blois. The gentle warmth, combined with the emerging autumn colors, invites visitors to enjoy this charming French city at a comfortably temperate pace.
September in Blois, France, marks the transition into autumn with precipitation levels averaging 39 mm (1.5 in), consistent with the lighter rainfall seen in the preceding summer months. Recorded over just 7 days, this moderate precipitation signals a shift from the more substantial summer showers, setting a tranquil tone for the month. As Blois prepares for the wetter season ahead, September’s weather creates a gentle lead-up to October, which is typically more humid, often reaching 79 mm (3.1 in). This trend reveals a clear pattern where rainfall begins to build as the year progresses, reflecting the gradual decline in temperatures and the lush, verdant landscapes characteristic of the Loire Valley during autumn.
In September, Blois experiences a noticeable shift in humidity, with levels averaging around 76%, marking a slight increase from the warmth of summer, where August saw a low of 68%. This transition indicates the onset of autumn, as humidity begins to rise again, but remains significantly lower than the wintry months ahead, where it can soar above 90%. The gradual decline from January's high of 90% to summer's lows reveals a clear trend: the changing seasons bring varying moisture levels, with September sitting comfortably in the middle, balancing the warmth of summer with the cooler, damp expectations of fall.
As September unfolds in Blois, France, the UV Index stands at 6, categorizing it as high exposure. This marks a slight decrease from the peak of 9 observed during the summer months of June and July, when sun protection was critical with a burn time of just 15 minutes. In comparison, the moderate burn time of 25 minutes this month allows for a bit more leisure under the sun, but caution remains essential. As autumn approaches, witnessing this shift from the intense summer sun provides a lovely opportunity to enjoy outdoor activities while staying mindful of UV levels. For more detailed insights on understanding and managing UV exposure throughout the year, check out the comprehensive resource here: Blois UV Index.
UV Risk Categories
September in Blois, France, marks a delightful transition as summer begins to wane, offering a warm embrace of 323 hours of sunshine. This month, while slightly less radiant than the peak of July's 416 hours, still showcases a generous display of sunlight that keeps the vibrant spirit of summer alive. As the days grow shorter, September's sunshine notably outshines the dimming light of October, which sees only 260 hours. The trend reveals a notable peak from May through July, where daylight hours reach their zenith, gradually tapering off into the cooler months. The steady glow of September not only invites leisurely strolls along the banks of the Loire but also signals the perfect time to savor the rich harvest of the season.
In Blois, France, the likelihood of sunny weather in September offers a pleasant transition into autumn, with a 46% chance of sunshine. This figure marks a notable increase compared to the summer months of July and August, which hover around 39% and 40% respectively. As the year progresses, sunny probabilities elevate from the chilly depths of January (15%) to a peak in the vibrant spring of April (60%). While September's sun chances are slightly lower than those in October (48%), this month remains a bright spot in the gradually cooling season, inviting locals and visitors alike to enjoy the temperate outdoors before winter sets in.
As summer fades and autumn begins to set in, September in Blois, France, offers a delightful transition with about 12 hours of daylight. This marks a gradual decline from the sunny heights of 15 hours enjoyed in the summer months, specifically from June to August. September serves as a bridge between the vibrant long days of summer and the shorter, cosier days of fall. As the sunlight wanes, the lush landscapes transform, embracing the softer hues of early autumn. This rhythm of daylight not only invites locals to savor the lingering warmth but also signals the impending seasonal changes, laying the groundwork for cooler October days ahead.
As September rolls in, Blois experiences a gentle shift in its breezy ambiance, characterized by an average wind speed of 2.9 m/s (7 mph). This marks a noticeable decline from the spring and summer months, where winds were more robust, particularly in May, which boasted the highest speed of 4.6 m/s (10 mph). Throughout the year, Blois typically enjoys moderate breezes, but September’s subtle winds indicate the transition towards the calmer, cooler days of autumn. While the air still whispers stories of summer, it begins to hint at the crispness to come, bridging the gap between the vibrant summer and the serene fall, creating a unique atmosphere for both residents and visitors.
The weather in Blois 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 Blois and find detailed weather information for every month.
In September, the weather is considerably warmer, with temperatures ranging from a minimum of 5°C (41°F) to a comfortable average of 18°C (64°F), peaking at a high of 36°C (97°F). The month experiences relatively low precipitation, totaling 39 mm (1.5 in) over about 7 days, along with a humidity level of 76%. In contrast, January brings a much chillier climate, with temperatures dipping down to a minimum of -7°C (19°F), averaging around 5°C (41°F), and a maximum of 16°C (60°F). Precipitation is slightly higher at 56 mm (2.2 in) over 9 days, and the humidity rises to 90%, making January feel notably damp. For more details on January weather, visit Blois weather in January.
In September, the weather is marked by warmer temperatures, with a minimum of 5°C (41°F) and an average of 18°C (64°F), reaching a maximum of 36°C (97°F). The month experiences relatively low precipitation of 39 mm (1.5 in) over about 7 days, coupled with a humidity level of 76%. In contrast, February is much colder, featuring a minimum temperature of -9°C (16°F) and an average of 7°C (44°F), with a maximum temperature reaching 22°C (72°F). The precipitation in February is higher at 63 mm (2.5 in) over 13 days, along with increased humidity at 88%. For further insights into February weather, check this link: Blois weather in February.
September and March present contrasting weather conditions. In September, temperatures fluctuate from a minimum of 5°C (41°F) to a maximum of 36°C (97°F), with an average of 18°C (64°F) and relatively low precipitation of 39 mm (1.5 in) over about 7 days, resulting in a humidity level of 76%. In stark contrast, March experiences colder temperatures, with a minimum of -9°C (16°F) and a maximum of 25°C (76°F), averaging just 9°C (48°F). The month is also wetter, receiving 67 mm (2.6 in) of precipitation across 13 days, contributing to a higher humidity level of 85%. For more detailed insights into March weather specifically, check out Blois weather in March.
In comparing the weather of September and April, we see distinct differences in temperature and overall climate. September boasts a higher average temperature of 18°C (64°F), with a range from a cool 5°C (41°F) to a warm 36°C (97°F), while April presents a cooler environment, with an average of 12°C (53°F) and temperatures dipping as low as -3°C (26°F) and peaking at 28°C (83°F). Both months experience similar precipitation levels of 39 mm (1.5 in) but differ slightly in the number of rainy days, with September having rain on about 7 days compared to April’s 8 days. Additionally, humidity levels are slightly higher in April at 83%, compared to September’s 76%. For a more detailed look at the weather in April, you can visit Blois weather in April.
When comparing the weather in September and May, it's clear that both months exhibit distinctive characteristics. September enjoys a wider temperature range, with minimums of 5°C (41°F) and maximums reaching up to 36°C (97°F), averaging around 18°C (64°F). The month typically sees lower precipitation, totaling 39 mm (1.5 in) over about 7 days and a humidity level of 76%. In contrast, May is generally cooler, with minimum temperatures dropping to 1°C (34°F) and an average of 15°C (59°F), while maximum temperatures cap at 32°C (89°F). May tends to be wetter, accumulating 79 mm (3.1 in) of rain over 13 days, accompanied by higher humidity at 83%. For a more detailed view of May weather, check out Blois weather in May.
In comparing the weather of June and September, we see some notable differences. June typically has a slightly higher average temperature of 19°C (67°F) compared to September's 18°C (64°F), with maximum temperatures reaching up to 39°C (102°F) in June versus 36°C (97°F) in September. September enjoys a lower minimum temperature, starting at 5°C (41°F) compared to June's 7°C (44°F). Both months experience significant precipitation, with June receiving about 69 mm (2.7 in) over 11 days, while September has 39 mm (1.5 in) over just 7 days. Humidity levels are relatively similar, with September at 76% and June slightly higher at 79%. For more detailed insights, check Blois weather in June.
September weather is characterized by a slightly wider temperature range compared to July, with minimum temperatures dropping to 5°C (41°F) and maximums reaching up to 36°C (97°F). In contrast, July tends to be warmer overall, with minimum temperatures around 9°C (49°F) and maximums hitting 41°C (106°F). Precipitation levels are similar in both months, near 35-39 mm (1.4-1.5 in), but July experiences slightly lower humidity at 71% compared to September’s 76%. For more detailed information, you can check out Blois weather in July.
In comparing the weather of September to August, September tends to be slightly cooler, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 36°C (97°F), while August features a higher minimum of 7°C (45°F) and an average temperature of 21°C (70°F). Both months experience similar precipitation levels, with September receiving 39 mm (1.5 in) over 7 days, just slightly more than August's 38 mm (1.5 in) over 8 days. Additionally, September is characterized by higher humidity at 76%, compared to August’s 68%. For a closer look at August weather in Blois, you can visit Blois weather in August.
In September, the weather tends to be warmer, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 36°C (97°F) and an average of 18°C (64°F). The month experiences relatively low precipitation at 39 mm (1.5 in) over about 7 days, with humidity sitting at a moderate 76%. In contrast, October brings cooler weather, with temperatures dropping to a minimum of 1°C (34°F), an average of 13°C (56°F), and a maximum of 27°C (81°F). Rainfall increases significantly to 79 mm (3.1 in) across 12 days, and humidity rises to 87%. For more details on October weather, you can check Blois weather in October.
In September, the weather features a warm average temperature of 18°C (64°F), with highs that can reach up to 36°C (97°F), making it a transition into the cooler autumn months. However, it also comes with a fair bit of humidity at 76% and some precipitation, amounting to around 39 mm (1.5 in) over approximately 7 days. In contrast, November brings much cooler temperatures, with a minimum of -3°C (26°F) and an average of only 8°C (47°F), along with more frequent rainfall that totals 69 mm (2.7 in) over 12 days. The humidity also rises to 91%, contributing to a distinctly chillier atmosphere. For more detailed insights on the weather during this month, check out Blois weather in November.
In September, the weather is characterized by warm temperatures, with a minimum of 5°C (41°F) and an average of 18°C (64°F), peaking at a high of 36°C (97°F). The month experiences relatively low precipitation, totaling 39 mm (1.5 in) over 7 days, along with a moderate humidity level of 76%. In contrast, December brings a significant drop in temperatures, with minimums reaching -4°C (26°F), an average of 7°C (44°F), and a maximum of 16°C (61°F). This winter month also sees increased precipitation, accumulating 96 mm (3.8 in) across 16 days and a higher humidity of 93%. For more details, check out Blois weather in December.
As the summer fades, September in Blois presents a captivating shift in weather patterns, offering a refreshing blend of warmth and crispness. With an average temperature that balances comfortably between the highs of summer and the chill of autumn, visitors can enjoy pleasant days, ideal for exploring the area's stunning landscapes. Although September experiences a slight increase in precipitation compared to the drier summer months, the humidity remains relatively high, creating a soft and inviting atmosphere. This transitional month serves as a perfect time to appreciate the beauty of Blois before the full onset of fall. For a more detailed look at what to expect throughout the year, check out Blois Climate.