Last updated: February 26, 2025
Calais, France, in September offers a mild and pleasant climate, perfect for exploring this charming coastal city. The maximum temperature reaches around 23°C (75°F), while the average temperature settles at a comfortable 17°C (62°F). Nights can be cooler, with minimum temperatures dipping to 11°C (51°F). Visitors should be prepared for some rain, as the month sees about 65 mm (2.6 in) of precipitation spread over 11 days, contributing to a humidity level of 80%. This blend of warm days and occasional showers makes September a unique time to enjoy Calais’s rich history and beautiful landscapes.
As September arrives in Calais, France, a noticeable transition begins, hinting at the impending autumn. The temperatures during this month feature a minimum of 11°C (51°F) and an average of 17°C (62°F), providing a comfortable reprieve from the summer heat. With a maximum temperature reaching 23°C (75°F), the days are still pleasantly warm, ideal for exploring the coastal beauty and historic sites. This shift marks a gradual decline from the summer highs, yet September retains a charming warmth that invites visitors to enjoy outdoor activities before the chill of October sets in. The gradual decrease in temperature indicates a beautiful blend of summer's farewell and autumn's embrace, creating a unique atmosphere in this picturesque French town.
In September, Calais experiences a balanced blend of rain and sunshine, receiving an average precipitation of 65 mm (2.6 in) over approximately 11 days of the month. While this amount marks a slight decrease from the wetter summer months, such as August, which recorded 74 mm (2.9 in), it is still significantly lower than the incoming autumn rains. This trend highlights a gradual transition in weather patterns, as the drier temperatures of April and July give way to more consistent precipitation, setting the stage for the much wetter months of October and December ahead. Overall, September stands as a pivotal month, illustrating a shift from the warmth of summer towards the cooler, rainier days of fall.
In September, Calais experiences a notable increase in humidity, reaching 80% after the warm summer months. While this is a slight uptick from the 73% seen in August, it remains relatively low compared to the winter months. Throughout the year, humidity levels in this coastal city are highest in the depths of winter, with January and February averaging around 91-89%. As spring transitions into summer, humidity tends to decline, hitting its lowest point in July at 76% before the trend reverses slightly in early autumn. This seasonal pattern emphasizes Calais' maritime climate, where the interplay of seasonal changes consistently shapes the humidity levels, creating a refreshing yet variable atmosphere as summer gives way to fall.
As summer fades, September in Calais marks a transition, with the UV Index dropping to 5, indicating a moderate level of exposure. This means that while the sun is still bright, residents and visitors can expect a burn time of about 30 minutes if unprotected. Compared to the peak months of June and July, when the Index reached a high of 8, September provides a more comfortable sunbathing experience without the extreme risk of sunburn. This slight decline reflects the approaching fall and the diminishing intensity of sunlight. However, it's essential to remain vigilant, as UV rays can still cause harm. For further details on UV exposure in this coastal city, check out the Calais UV Index.
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As the warmth of summer gives way to the crispness of autumn, September in Calais shines with an impressive 326 hours of sunshine. This month marks a subtle decline from the peak summer months of July and August, yet it still radiates more sunlight than the earlier months of the year. Following the vibrant displays of light in May and June, which boast hours exceeding 400, September offers a gentle transition, embodying the lingering grace of summer while hinting at the quieted glow of October with its 250 hours. Overall, the trend reveals a gradual journey toward shorter days, yet September remains a delightful bridge, allowing residents and visitors alike to bask in the mellow, golden sun before winter's approach.
In Calais, France, September experiences a 40% chance of sunny weather, maintaining a consistency that's visible in the months leading up to it. Following the summer months of July and August, where sunshine probabilities hover around 42% and 39% respectively, September's weather signals a gentle transition towards autumn. Interestingly, this month mirrors March's likelihood, suggesting a reliable warmth that can still entice visitors. As the year progresses into October, the chance of sun dips to 30%, emphasizing that while September offers a favorable window for sun seekers, it's the last glitter of summer before the cold sets in.
In Calais, France, the month of September marks a gentle transition from the long, sun-drenched days of summer to the shorter, cooler days of autumn. With 12 hours of daylight, September's sunlight begins to wane compared to the peak of 16 hours seen in June. This gradual decline reflects the annual rhythm of the seasons, where longer days give way to the crisp, shorter daylight hours of fall. As summer fades, September holds onto a good portion of daylight, allowing for lingering outdoor activities and a chance to savor the changing foliage before the darker days of October arrive with only 10 hours of sunlight.
As September graces Calais, the wind takes a gentle turn, averaging 5.2 m/s (12 mph), making it one of the calmer months of the year. This shift follows a gradual decline from the summer breezes, marked by a peak in August where winds reached 6.4 m/s (14 mph). Interestingly, the month heralds the beginning of a seasonal transition; while the winds lull, they also anticipate the invigorating gusts of fall, as October sees a notable rebound to 7.2 m/s (16 mph). This pattern reflects a consistent rhythm throughout the year, characterized by stronger winds in winter and early spring, while the summer months offer a brief reprieve. Thus, September serves as a serene bridge, blending the warmth of late summer with the crispness of autumn on the horizon.
The weather in Calais 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 Calais and find detailed weather information for every month.
In September, temperatures are milder, ranging from a minimum of 11°C (51°F) to a maximum of 23°C (75°F), while January brings much colder weather with temperatures dropping to a minimum of -2°C (28°F) and peaking at 13°C (56°F). September experiences an average temperature of 17°C (62°F), making it a relatively comfortable month, whereas January has a much lower average of 6°C (44°F). Precipitation in September totals 65 mm (2.6 in) over 11 days, slightly less than January's 75 mm (2.9 in) over 12 days. The humidity is also higher in January at 91% compared to 80% in September. For more details on January weather, you can check Calais weather in January.
September and February exhibit stark differences in weather conditions. September enjoys milder temperatures, with a minimum of 11°C (51°F) and an average of 17°C (62°F), gradually peaking at a max of 23°C (75°F). In contrast, February is much colder, with temperatures dipping to a minimum of -3°C (26°F) and only reaching an average of 7°C (44°F), peaking at 14°C (57°F). Both months experience similar levels of precipitation, around 65 mm (2.6 in), and roughly the same number of rainy days, though February has slightly higher humidity at 89% compared to September's 80%. For a closer look at February weather, visit Calais weather in February.
When comparing the weather in September and March, we see distinct differences in temperature and conditions. September typically enjoys milder temperatures with a minimum of 11°C (51°F) and an average of 17°C (62°F), reaching a maximum of 23°C (75°F). In contrast, March starts off much chillier, with a minimum of -4°C (26°F) and an average of 8°C (46°F), although it can warm up to 19°C (66°F) at its peak. Both months also experience a significant amount of precipitation; September sees 65 mm (2.6 in) over 11 days, while March has slightly less at 63 mm (2.5 in) but over 14 days, indicating more frequent rain. Humidity levels are higher in March at 86%, compared to September's 80%. For more detailed information, visit Calais weather in March.
When comparing the weather in September and April, we can see distinct differences in temperature and precipitation patterns. September boasts milder temperatures, with an average of 17°C (62°F) and maximum highs reaching 23°C (75°F), while April experiences cooler averages around 9°C (49°F), peaking at 18°C (66°F). In terms of rainfall, September is wetter, receiving 65 mm (2.6 in) over 11 days compared to April's 28 mm (1.1 in) over just 7 days. Additionally, humidity levels are slightly higher in April at 85% as opposed to September’s 80%. For more detailed weather insights, you can check Calais weather in April.
September and May both feature similar maximum temperatures, reaching around 23°C (74°F) to 75°F, but their overall climate characteristics differ. In September, the average temperature is warmer at 17°C (62°F), compared to May's cooler average of 12°C (54°F). September experiences slightly higher precipitation of 65 mm (2.6 in) over 11 days, while May has 60 mm (2.4 in) across 9 days, indicating a relatively wetter month. Additionally, humidity levels are quite close, with May at 82% and September at 80%. For more detailed information on May weather, check this link: Calais weather in May.
September and June present similar temperature ranges, with both months featuring a minimum of 11°C (51°F). However, September averages slightly warmer temperatures at 17°C (62°F), compared to June's 16°C (60°F). June typically sees higher maximum temperatures, reaching up to 26°C (79°F), while September peaks at 23°C (75°F). Precipitation levels are fairly comparable, with September receiving 65 mm (2.6 in) over 11 days, and June slightly less at 62 mm (2.4 in) over 9 days. Humidity levels are also similar, hovering around 80% in September and 81% in June. For a more detailed look at June weather, you can visit Calais weather in June.
When comparing the weather in September and July, noticeable differences emerge. September typically sees milder temperatures, with a minimum of 11°C (51°F) and a maximum of 23°C (75°F), averaging around 17°C (62°F). In contrast, July is warmer, featuring minimum temperatures of 13°C (56°F) and maximum highs reaching 32°C (89°F), with an average of 18°C (64°F). Precipitation levels also vary, with September receiving 65 mm (2.6 in) over 11 days, while July has less rainfall at 48 mm (1.9 in) over 9 days. Humidity is slightly higher in September at 80%, compared to 76% in July. For more detailed insights, you can check out Calais weather in July.
In comparing the weather between September and August, September tends to be cooler with average temperatures ranging from a minimum of 11°C (51°F) to a maximum of 23°C (75°F), while August experiences higher averages, peaking at 28°C (82°F). Precipitation is slightly lower in September at 65 mm (2.6 in) over 11 days, compared to August's 74 mm (2.9 in) across 12 days. Additionally, September has a higher humidity level at 80%, making the air feel more humid than in August, where the humidity is a more comfortable 73%. For a more detailed look at August's weather conditions, visit Calais weather in August.
In September, the weather typically features milder temperatures, with averages around 17°C (62°F) and a maximum of 23°C (75°F). The month experiences about 65 mm (2.6 in) of precipitation over 11 days, accompanied by a relative humidity of 80%. In contrast, October brings cooler temperatures, with an average of 14°C (57°F) and a maximum of 22°C (72°F). However, it is notably wetter, with precipitation reaching 118 mm (4.6 in) over 17 days and higher humidity at 89%. For more detailed insights, you can check the weather specifics at Calais weather in October.
In September, the weather is generally milder with average temperatures around 17°C (62°F) and a maximum of 23°C (75°F), making it a pleasant transition into autumn. The month sees around 65 mm (2.6 in) of rainfall over approximately 11 days, with a humidity level of 80%. In contrast, November experiences a significant drop in temperatures, averaging 10°C (50°F) with highs reaching only 17°C (64°F) and lows plummeting to 3°C (37°F). Precipitation increases to about 90 mm (3.6 in) spread over 17 days, accompanied by a higher humidity of 92%. For more detailed information on November's weather, check out Calais weather in November.
September weather is characterized by milder temperatures, with averages around 17°C (62°F) and maximums reaching 23°C (75°F). Precipitation is moderate, with about 65 mm (2.6 in) falling over 11 days, and humidity levels are relatively high at 80%. In contrast, December brings much cooler temperatures, with averages dropping to 8°C (47°F) and maximums peaking at just 14°C (57°F). This month also sees increased precipitation, totaling 133 mm (5.2 in) over 19 days, alongside even higher humidity levels of 92%. For more details about December weather, you can visit Calais weather in December.
As summer transitions to autumn, September in Calais offers a refreshing change from the preceding months. The moderate temperatures create a pleasant atmosphere for outdoor activities, while the increased humidity adds a crispness to the air that is often missed in the hotter summer days. With an uptick in rainfall, it’s wise to prepare for a few showers, as the month typically experiences more precipitation days than its drier summer counterparts. If you're planning a visit, be sure to check the latest on weather patterns for this vibrant coastal city. For more detailed insights, visit Calais Climate.