Last updated: August 21, 2025
September in Thessaloniki, Greece offers a delightful blend of warm days and cooler evenings, with maximum temperatures reaching 35°C (95°F) and an average of 22°C (72°F). Cooler nights can dip to 8°C (46°F), providing a refreshing contrast. The month sees approximately 27 mm (1.1 in) of rain over 5 days, contributing to a humidity level of 57% that enhances the city's vibrant atmosphere. Visitors can enjoy the lingering summer warmth while being prepared for the occasional drizzle, making September a charming month to explore Thessaloniki’s rich history and culture.
In September, Thessaloniki enjoys a pleasant transition from the sweltering summer months to the milder fall, featuring temperatures that range from a minimum of 8°C (46°F) to a maximum of 35°C (95°F). With an average temperature of 22°C (72°F), this month serves as a sweet spot for outdoor activities, allowing visitors to relish the warm days while enjoying cooler evenings. The lingering warmth from August gradually gives way to the refreshing breezes of autumn, making September an ideal time to explore the city’s rich history and vibrant culture before the autumn chill sets in. As the month progresses, temperatures begin to dip, signaling the approach of the cooler October weather, creating a perfect backdrop for those keen to experience Thessaloniki's beautiful transition into fall.
In September, Thessaloniki enjoys a pleasant transition into autumn, marked by a significant drop in precipitation. With only 27 mm (1.1 in) of rain over approximately 5 days, this month's rainfall is the lowest of the year, showcasing a gradual easing from the wetter summer months. The preceding June and July witness peak precipitation levels of 100 mm (3.9 in) and 52 mm (2.1 in), respectively, paving the way for drier conditions as summer fades. This trend of declining rainfall continues into October, where the precipitation amount climbs again, making September a brief respite before the subsequent increase in rainfall typical of the fall season. Overall, September stands out for its mild weather and reduced rain, setting an inviting stage for autumn wanderings in this historic city.
As summer fades into autumn, September in Thessaloniki experiences a notable transition in humidity levels. Following the peak dryness of August at 47%, September sees a slight increase to 57%, marking the beginning of a more humid season. This uptick is part of a broader trend, as the city typically showcases higher humidity in the fall and winter months, culminating in January’s peak at 88%. The gradual rise in September serves as a precursor to the wetter months ahead, providing a refreshing change for residents and visitors alike, who can expect the air to become increasingly rich and enveloping as the year progresses.
In September, Thessaloniki experiences a high UV Index of 7, indicating an increased risk of harm from unprotected sun exposure. With a burn time of just 25 minutes, it's essential for residents and visitors to take precautions, especially as this month sees a slight drop in UV levels compared to the peak summer months of June, July, and August, which boasted indices of 9 and 10. The early autumn sun still has enough intensity to cause skin damage, similar to the levels seen in April and May. Therefore, while September offers a respite from the peak summer glare, vigilance remains key for enjoying the sun safely. For more details on UV trends throughout the year, explore Thessaloniki UV Index.
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As the vibrant summer months of July and August begin to fade, September in Thessaloniki still embraces a generous 346 hours of sunshine. This marks a delightful transition, with daylight dipping from the highs of summer, yet remaining significantly robust compared to the earlier months of the year. This trend demonstrates that while the sun begins to retreat, autumn still offers an enjoyable glow, perfect for exploring the city's rich culture and historical sites. With a gradual decrease in light, from the peak of 424 hours in July to September's inviting warmth, those visiting can relish in the lingering summer feel, making it an ideal time for leisurely strolls along the waterfront or savoring local cuisine al fresco style.
As summer transitions into autumn, Thessaloniki experiences a noticeable shift in the likelihood of sunny weather. September boasts a sunny probability of 53%, a modest decrease from the peak summer months of July and August, where the sun shines nearly 80% of the time. This slight dip indicates that while the warm, sunny days continue to linger, the arrival of fall introduces a blend of sunny interludes and the beginning of more variable weather. Despite this reduction, September remains a favorable time for outdoor activities, ensuring visitors can still relish in the Mediterranean warmth before the cooler months set in.
As summer gently fades into autumn, the daylight duration in Thessaloniki, Greece begins to shift. In September, the city enjoys 12 hours of sunlight, a graceful decline from the peak of 15 hours in June. This transition marks the end of the sun-drenched days of summer, where the daylight hours typically wane gradually, reflecting the changing season. The rhythm of light in September reminds residents and visitors alike of the approaching fall, setting the stage for a cozy embrace of cooler weather and the rich hues of autumn leaves. While the days may shorten, the beautiful Mediterranean sunsets continue to cast a warm glow over the city, inviting everyone to savor the lingering summer charm just a little longer.
As summer wanes, September in Thessaloniki brings a subtle shift in the breeze, with average wind speeds dipping to 1.8 m/s (4 mph). This gradual decline marks the end of the warmer months, contrasting with the gentle gusts often felt earlier in the year. In fact, September experiences one of the lightest winds of the year, mirroring the calmer patterns seen in August. The transition into autumn is gentle, with the wind whispering through the historic streets and along the waterfront, setting a tranquil backdrop for locals and visitors alike to savor the lingering warmth of the Mediterranean. While the winds may calm, the vibrant atmosphere of Thessaloniki remains undiminished, inviting exploration and enjoyment in this picturesque city.
Weather in Thessaloniki varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Thessaloniki, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is typically warm and pleasant, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 35°C (95°F) and an average of 22°C (72°F). This month sees relatively low precipitation at 27 mm (1.1 in) over about five days, along with a moderate humidity of 57%. In contrast, January presents a starkly different climate; the temperatures drop significantly, with a minimum of -10°C (14°F) and an average of just 4°C (39°F), peaking at 18°C (65°F). Precipitation increases to 58 mm (2.3 in) across eight days, and humidity rises to a notable 88%. For more detailed information, you can check out Thessaloniki weather in January.
September and February present strikingly different weather patterns. In September, temperatures can soar with an average of 22°C (72°F) and highs reaching up to 35°C (95°F), while the minimum temperature rarely drops below 8°C (46°F). This month also sees moderate precipitation, averaging 27 mm (1.1 inches) over about 5 days, with a humidity level of 57%. In contrast, February experiences much colder conditions, with an average temperature of only 7°C (46°F) and lows plummeting to -5°C (23°F). This winter month is typically wetter, with 46 mm (1.8 inches) of precipitation spread over 8 days, contributing to a higher humidity of 83%. For more detailed insights, check out Thessaloniki weather in February.
In comparing the weather of September and March, September offers a much warmer climate with average temperatures hovering around 22°C (72°F), while March experiences a cooler average of 10°C (50°F). The maximum temperature in September can reach up to 35°C (95°F), creating a stark contrast to March's maximum of 25°C (77°F). Additionally, September is relatively dry with only 27 mm (1.1 in) of precipitation over about 5 days, whereas March sees significantly more rainfall, totaling 84 mm (3.3 in) over approximately 12 days. Humidity levels also differ, as September's humidity stands at 57%, compared to 81% in March, making the latter feel noticeably more humid. For more details on the weather in March, you can visit Thessaloniki weather in March.
September and April showcase distinct weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 35°C (95°F), with an average temperature of 22°C (72°F). The month experiences relatively low precipitation at 27 mm (1.1 in) over five rainy days and a humidity level of 57%. In contrast, April features cooler temperatures, with a minimum of 1°C (34°F), an average of 14°C (57°F), and a maximum of 29°C (85°F). This month also has higher precipitation, totaling 57 mm (2.2 in) across nine days, and increased humidity at 71%. To explore more about the April climate, you can check Thessaloniki weather in April.
When comparing the weather in September and May, it’s clear that both months share similar minimum temperatures, hovering around 8°C (46°F) to 8°C (47°F). However, September generally offers warmer average highs, reaching up to 35°C (95°F), while May peaks at a slightly lower 33°C (91°F). Additionally, September experiences much less precipitation with only 27 mm (1.1 in) over 5 days compared to May's 77 mm (3.0 in) across 10 days, making it drier overall. Humidity levels are also higher in May at 74%, compared to 57% in September, contributing to a more muggy feel during the spring month. For those interested in more detailed information on May weather, check out Thessaloniki weather in May.
The weather in September is generally milder compared to June, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 35°C (95°F), while June sees slightly higher averages from 12°C (54°F) to 38°C (101°F). September experiences less precipitation, totaling 27 mm (1.1 in) over about 5 days, in contrast to June's significantly higher 100 mm (3.9 in) spread across 13 days. Additionally, September’s humidity is lower at 57%, making the warm temperatures feel more comfortable compared to the higher humidity of 63% in June. For more details, you can check out Thessaloniki weather in June.
In comparing the weather of September and July, it is clear that July tends to be warmer and more humid. The average temperature in July reaches a comfortable 26°C (79°F), peaking at a high of 39°C (102°F), while September has a slightly cooler average of 22°C (72°F) and a maximum of 35°C (95°F). Additionally, July experiences more precipitation, with 52 mm (2.1 in) falling over 7 days compared to September's 27 mm (1.1 in) over 5 days. Humidity levels are also marginally higher in July at 60%, compared to September's 57%. For more details on July's weather, you can check Thessaloniki weather in July.
In comparing the weather of September to that of August, we see distinct differences in temperature and precipitation. September features a wider temperature range, with minimums dipping to 8°C (46°F) and maximums reaching up to 35°C (95°F), resulting in an average temperature of 22°C (72°F). In contrast, August is noticeably warmer with minimums of 15°C (60°F) and maximums soaring to 40°C (105°F), averaging 26°C (80°F). Additionally, September experiences less precipitation, totaling 27 mm (1.1 in) over 5 days, while August has a heavier rainfall of 50 mm (2.0 in) across the same number of days. Humidity levels are also higher in September at 57%, compared to 47% in August. For more detailed insights, you can check out Thessaloniki weather in August.
September and October exhibit distinct shifts in weather patterns. September enjoys warmer temperatures, with a range from a minimum of 8°C (46°F) to a maximum of 35°C (95°F) and an average of 22°C (72°F). In contrast, October sees cooler weather, with temperatures dropping to a minimum of 4°C (40°F) and an average of 16°C (61°F), peaking at 29°C (85°F). Additionally, October experiences increased precipitation, measuring 62 mm (2.5 in) over 6 days compared to September's 27 mm (1.1 in) over 5 days. Humidity also rises in October to 76%, compared to 57% in September. For a more detailed look at conditions, check out Thessaloniki weather in October.
September's weather features warm temperatures, with a minimum of 8°C (46°F) and an average high of 22°C (72°F), making it a pleasant month for outdoor activities. The precipitation is relatively low at 27 mm (1.1 in) over 5 days, contributing to a moderate humidity level of 57%. In contrast, November brings notable changes, with colder temperatures dropping to a minimum of -2°C (28°F) and an average high of 12°C (53°F). The month experiences higher precipitation levels of 80 mm (3.2 in) over 10 days, along with increased humidity at 85%. This shift indicates a transition from mild autumn days in September to the chillier and wetter conditions of November. For more details, check out Thessaloniki weather in November.
In September, the weather in Thessaloniki is typically warm, with temperatures ranging from a mild 8°C (46°F) at night to a hot 35°C (95°F) during the day, and an average of 22°C (72°F). The month sees relatively low precipitation at 27 mm (1.1 in) over five days, and humidity levels are moderate at 57%.
Contrastingly, December brings a stark change, featuring much cooler temperatures, with a minimum of -6°C (22°F) and a maximum of 18°C (65°F), averaging just 7°C (45°F). Rainfall increases significantly to 83 mm (3.3 in), spread over nine days, and humidity rises to a high of 87%. For a detailed look at December weather in Thessaloniki, visit Thessaloniki weather in December.
As summer transitions into autumn, September brings a delightful change to Thessaloniki’s weather. With average temperatures hovering around a comfortable 22°C (72°F) and maximums that can still reach up to 35°C (95°F), the month offers a pleasant mix of warmth and cooler evenings, making it ideal for outdoor activities. While the humidity remains moderate at 57%, the rainfall is light, with just a few days of precipitation totaling 27 mm (1.1 in). This refreshing shift provides a stark contrast to the scorching summer months, inviting visitors to explore the city's stunning landscapes and rich history. For a more detailed outlook on Thessaloniki's weather patterns throughout the year, check out the Thessaloniki Climate page.