Last updated: February 26, 2025
In September, Paris experiences a delightful blend of summer warmth and the gentle onset of autumn. With maximum temperatures soaring up to 34°C (93°F), the city still basks in sunshine, while the average temperature hovers around a comfortable 17°C (62°F). As the month progresses, a refreshing coolness brings lower temperatures down to 4°C (40°F). Rainfall is modest, totaling 49 mm (1.9 in) over about 8 days, accompanied by a humidity level of 76%, making the air feel crisp yet invigorating. This transitional month invites visitors to enjoy the enchanting streets of Paris, adorned in a palette of early fall colors.
As September unfolds in Paris, the temperatures begin to shift, embracing the early whispers of autumn. With a minimum of around 4°C (40°F) and an average that comfortably settles at 17°C (62°F), the city offers a pleasant respite from the summer heat. The maximum can still soar to 34°C (93°F), reflecting the lingering warmth of the season. This month presents a delightful balance: warm days perfect for leisurely strolls along the Seine, while cooler evenings invite cozy moments at cafes. As the leaves start to turn, September transforms Paris into a beautiful canvas, making it an ideal time to explore the rich culture and vibrant atmosphere the city has to offer.
September in Paris sees a moderate precipitation amount of 49 mm (1.9 in), marking a slight dip as summer gives way to autumn. This month typically experiences about 8 days of rain, continuing the trend of diminishing precipitation following the wetter months of May and June. Interestingly, September's rainfall is notably less than the 79 mm (3.1 in) that October brings, suggesting a transitional phase as the city prepares for the onset of fall. Overall, the shifting weather patterns hint at the approaching chill, with a gradual increase in rainfall expected in the subsequent months.
As summer wanes, September in Paris brings a slight uptick in humidity, averaging around 76%. This marks a transition from the drier August, which saw humidity levels drop to a comfortable 68%. The trend illustrates a gradual return to the more humid conditions that characterize the autumn months—particularly as October approaches with a significant rise to 88%. Overall, September serves as a bridge, where lingering summer warmth meets the encroaching dampness of fall, creating a unique atmosphere in the City of Light.
As September unfolds in Paris, the UV Index reflects a transition from the sizzling summer months to the more temperate autumn. This month, the UV Index averages at 6, categorizing exposure as high, with a burn time of approximately 25 minutes for fair-skinned individuals. This indicates a slight dip from the peak levels experienced in July and August, when the Index soared to 8. While the sun's rays remain potent, this decline is a reminder that the intensity of solar radiation is moderating. If you're soaking in the early autumn sun, it's wise to enjoy the outdoors while also being mindful of skin protection. For more detailed insights, visit Paris UV Index.
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As the vibrant glow of September sunshine blankets Paris, the city basks in an impressive 323 hours of daylight, marking a graceful transition from the peak summer days. This month captures the tail end of a radiant season, with sunlight hours gradually tapering from the 407 hours of July, creating a warm and inviting atmosphere for locals and visitors alike. September’s sunshine remains a significant contributor to the annual total, outshining the quieter months of autumn ahead. The ebb and flow of daylight in Paris reveals a charming rhythm: from the glimmering 388 hours in May to the cozy 266 hours in October, each month tells a unique story. As the golden hues of September give way to the cooler tones of fall, the city prepares for a new chapter, rich in culture and the fading warmth of lingering summer days.
In September, Paris enjoys a 42% chance of sunny weather, making it one of the more favorable months for sunshine compared to the summer months, which hover around 36%. This slight uptick in sunlit days, following the more unpredictable summer, signals a transition as autumn approaches. Notably, September follows the more vibrant spring months, where sunshine chances peak in April at 57% and drop in May. The positive trend in sunny weather during September offers a delightful window for both locals and visitors to explore the city's charm under the gentle sun, inviting outdoor activities before the cooler October sets in with an improved chance of bright days at 43%.
As summer gracefully gives way to autumn, September in Paris welcomes a warm embrace of 12 hours of daylight, signaling the transition from the sun-soaked days of August and the fading brightness of July. This month stands as a midpoint, reflecting a gentle decline in daylight hours compared to the vibrant 15 hours experienced during May and June. The shift is a reminder of nature's rhythm, showcasing the increasing coolness of the season ahead. While the days shorten, there's still ample time to explore the enchanting streets and rich culture of Paris, allowing visitors to soak up the lingering warmth before the darker days of October and November descend. Embrace September's atmosphere, where day and night meld seamlessly, offering a perfect blend of light and shadow in the City of Light.
As summer fades into autumn, September in Paris brings a gentle shift in the wind, with an average speed of 2.7 m/s (6 mph). This marks one of the calmest months of the year, suggesting a serene transition as the bustling city starts to slow down. Compared to the lively breezes of late spring, which peak at 4.3 m/s (10 mph) in May, September offers a more soothing atmosphere. While the winds pick up again in October, reaching 3.7 m/s (8 mph), September’s tranquil gusts invite leisurely strolls along the Seine and a chance to savor the last remnants of summer days. This subtle dip in wind speed indicates a seasonal change, creating an enchanting backdrop for Parisian life as it embraces the slower rhythms of fall.
The weather in Paris 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 Paris and find detailed weather information for every month.
September and January present stark contrasts in weather. September boasts a wide temperature range, with minimums around 4°C (40°F) and maximums reaching 34°C (93°F), providing an average warmth of 17°C (62°F). In contrast, January is much cooler, with temperatures dipping to a minimum of -8°C (18°F) and an average of only 4°C (40°F), peaking at 14°C (58°F). While September experiences moderate rainfall of 49 mm (1.9 in) over about 8 days, January sees slightly higher precipitation at 57 mm (2.2 in) over 10 days, along with increased humidity at 91%. These differences vividly illustrate the transition from the warmth of early autumn to the chill of mid-winter. For a more detailed look into January weather, you can visit Paris weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a brisk 4°C (40°F) at night to a warm average of 17°C (62°F) during the day, peaking at a sizzling 34°C (93°F) on the warmest days. The month sees about 49 mm (1.9 in) of precipitation over approximately 8 days, with humidity around 76%. In stark contrast, February experiences much cooler temperatures, with nightly lows plummeting to -8°C (17°F) and a daily average of only 6°C (43°F), reaching a maximum of 20°C (68°F). February is also wetter, with 67 mm (2.6 in) of rain spread across about 13 days and higher humidity levels at 89%. For more specific insights into February conditions, you can check Paris weather in February.
September and March present quite different weather patterns. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 34°C (93°F), with an average of 17°C (62°F). The month experiences 49 mm (1.9 in) of precipitation over about 8 days, along with a humidity level of 76%. In contrast, March shows cooler conditions, with temperatures dipping as low as -9°C (17°F) and peaking at 24°C (75°F), averaging at 8°C (47°F). There is more rainfall in March, totaling 74 mm (2.9 in) spread over 14 days, and the humidity is slightly higher at 85%. For those interested in detailed March weather trends, check out Paris weather in March.
In comparing the weather between September and April, we see distinct differences in temperatures and conditions. September boasts a wider temperature range, with a minimum of 4°C (40°F) and a maximum of 34°C (93°F), giving it a much warmer average of 17°C (62°F). Additionally, it faces higher humidity levels at 76% and increased precipitation, totaling 49 mm (1.9 in) over 8 days. On the other hand, April experiences cooler conditions, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 28°C (82°F), resulting in a lower average of 11°C (52°F). It also has less precipitation, totaling 33 mm (1.3 in) over 6 days, but comes with slightly higher humidity at 84%. For a more detailed look at April's weather patterns, you can visit Paris weather in April.
In comparing the weather of September and May, we see distinct differences in temperature and precipitation patterns. September typically boasts a broader temperature range, with lows of 4°C (40°F), averages around 17°C (62°F), and highs reaching up to 34°C (93°F). In contrast, May's temperatures are generally milder, with minimums of 0°C (33°F), average temperatures of 14°C (58°F), and maximums capping at 30°C (86°F). While September receives about 49 mm (1.9 in) of precipitation over 8 days, May tends to be wetter, accumulating 75 mm (3.0 in) over 13 days. Additionally, both months exhibit high humidity, with September at 76% and May slightly higher at 82%. For more specific insights on May weather, you can visit Paris weather in May.
In comparing the weather between September and June, we observe some notable differences. September experiences a wider temperature range, with minimums dipping to 4°C (40°F) and maximums soaring up to 34°C (93°F), while June has a milder minimum of 7°C (44°F) and a slightly higher maximum at 36°C (97°F). Precipitation in June is also higher, with 74 mm (2.9 in) recorded over 12 days compared to September's 49 mm (1.9 in) across 8 days. Humidity levels are closely matched, with September at 76% and June slightly higher at 80%. For more details on June weather, visit Paris weather in June.
When comparing September and July weather, September typically offers a broader range of temperatures, with a minimum of 4°C (40°F) and a maximum of 34°C (93°F), resulting in an average temperature of 17°C (62°F). In contrast, July presents warmer conditions, featuring a minimum of 8°C (46°F), an average of 20°C (69°F), and a peak temperature of 41°C (106°F). Interestingly, both months experience similar levels of precipitation, around 49-51 mm (1.9-2.0 in) over approximately 8 days, but September tends to have slightly higher humidity at 76%, compared to July's 73%. For more details on July's climate, visit Paris weather in July.
In comparing the weather of September and August, it’s evident that September experiences a broader temperature range, with minimums dipping to 4°C (40°F) and maximums reaching up to 34°C (93°F), while August maintains a warmer profile, with minimums at 7°C (44°F) and maximums peaking at 37°C (99°F). Additionally, September sees slightly less precipitation at 49 mm (1.9 in) over 8 days compared to August's 60 mm (2.3 in) over 10 days, contributing to its higher average humidity of 76% compared to August's 68%. Overall, September tends to be cooler and a bit wetter than August. For more detailed information, visit Paris weather in August.
September and October present a noticeable shift in weather conditions. In September, temperatures vary from a cool 4°C (40°F) at night to a warm 34°C (93°F) during the day, with an average of 17°C (62°F). The month typically experiences 49 mm (1.9 in) of precipitation over about 8 days, with humidity averaging around 76%.
In contrast, October brings cooler temperatures, with minimums dropping to 2°C (35°F) and maximums reaching 26°C (79°F). The average temperature falls to 13°C (55°F), and precipitation increases to 79 mm (3.1 in) spread over 13 days, resulting in a higher humidity level of 88%. This transition marks a shift from the warmth of September to the cooler and wetter conditions of October. For more detailed information on the specifics of October weather, you can visit Paris weather in October.
In September, the weather is generally much warmer, with average temperatures around 17°C (62°F) and a maximum reaching 34°C (93°F), while November sees a drop in temperature, averaging only 8°C (46°F) and peaking at 19°C (67°F). September experiences less rainfall, averaging 49 mm (1.9 in) over about 8 days, compared to November, which typically has 65 mm (2.6 in) spread across 12 days. Additionally, November is significantly more humid, with levels reaching 92% compared to September's 76%. For further details on the weather patterns, you can check Paris weather in November.
September and December present stark contrasts in weather. In September, temperatures soar with an average of 17°C (62°F) and maximums reaching 34°C (93°F), fostering a warm atmosphere alongside 49 mm (1.9 in) of precipitation over about 8 days and humidity at 76%. In contrast, December sees much colder weather with average temperatures dropping to 6°C (43°F), maxing out at 15°C (60°F), along with significant rainfall totaling 102 mm (4.0 in) across 17 days and higher humidity levels at 93%. For more detailed information, you can explore Paris weather in December.
As summer gives way to autumn, September in Paris showcases a delightful transition, marked by moderate temperatures and an inviting ambiance. With a comfortable average of 17°C (62°F), it's a month that balances the warmth of lingering summer days and the crispness of approaching fall. While you may encounter some rain—averaging 49 mm across about 8 days—the humidity remains relatively high at 76%, lending an earthy richness to the air. This weather contrasts vividly with the harsh cold of winter and the sweltering heat of July and August, making September a perfect time for exploration. Discover more about how these atmospheric changes contribute to the city's charm in our detailed overview of Paris Climate.