Last updated: August 21, 2025
Rethymno, Greece in September offers a delightful blend of warm temperatures and moderate humidity, making it an enticing destination for travelers. With maximum temperatures reaching 31°C (88°F) and an average of 23°C (74°F), the days are beautifully warm, while evenings cool down to a pleasant minimum of 16°C (61°F). Visitors can expect a touch of rain, with 25 mm (1.0 in) of precipitation spread over just 3 days of the month, ensuring that sunny skies are more common than not. The humidity level at 74% adds a slight tropical feel, perfect for enjoying the stunning beaches and vibrant culture that Rethymno has to offer.
In September, Rethymno enjoys a pleasant transition into autumn, with temperatures reflecting a delightful warmth. The minimum temperature settles around 16°C (61°F), providing a comfortable start to the day, while the average peaks at a cozy 23°C (74°F). With maximum temperatures reaching up to 31°C (88°F), it's the perfect time for basking in the Mediterranean sun before the cooler months arrive. Compared to the sizzling summer months, September's weather offers a more moderate climate, making outdoor activities and beach visits both enjoyable and refreshing. As the month progresses, the city embraces a softer atmosphere, making it an ideal destination for travelers seeking a charming escape.
In September, Rethymno experiences a shift as the summer heat begins to wane, bringing with it an increase in rainfall compared to the dry months of July and August. With 25 mm (1.0 in) of precipitation over 3 days, it marks a transition towards a wetter autumn. This month's rainfall stands out against the backdrop of a notably dry summer, indicating a resurgence of humidity and the first whispers of the rainy season. Looking back, it's clear that September, while still relatively mild, serves as an important bridge to the wetter months ahead, acting as a gentle reminder that nature is gearing up for the more substantial rains of October and November.
As summer gives way to autumn in Rethymno, Greece, September marks a transition in humidity, with levels dropping to 74%. This shift follows the peak of 84% humidity in May, gradually easing throughout the warmer months. June and July maintain relatively high humidity levels at 83% and 81%, before August’s slight dip to 78%. The September humidity reflects a subtle but notable decline, hinting at the onset of fall and the refreshingly crisp air to come. This trend continues into October, where humidity further relaxes to 73%, suggesting a comfortable climate for visitors looking to experience the charm of Rethymno beyond the summer hustle.
In Rethymno, Greece, September marks the transition from summer heat towards autumn, where the UV Index remains notably high at 9, indicating a very high exposure category. With a burn time of just 15 minutes, it's essential to stay vigilant about sun protection during this month, as the intensity of UV radiation is still significant. This high UV Index reflects the lingering warmth of summer that peaks in June and July, where levels reach 11, and remains elevated throughout August. Although September provides a slight reduction in UV intensity, it still demands attention, especially for those spending extended time outdoors. To understand the full UV Index trends and stay safe under the sun, check the detailed information here: Rethymno UV Index.
UV Risk Categories
September in Rethymno, Greece, continues the sun-kissed tradition of summer with an impressive 352 hours of sunshine, making it a delightful time to soak up the warm rays. As the peak summer months of July and August wrap up, which enjoy 422 and 395 hours respectively, September offers a slightly more tempered experience while still delivering plenty of bright days. This transition hints at the changing seasons, with sunshine gradually tapering off as October arrives, bringing 317 hours. It's a prime opportunity for travelers to relish the lingering warmth and vibrant atmosphere of the region before autumn settles in, blending the best of summer's vibrancy with the charm of early fall.
In Rethymno, Greece, September heralds a delightful transition as summer gradually yields to autumn, boasting an impressive 88% chance of sunny weather. This follows a spectacular August, where sun-soaked days peak at 98%, ensuring many have enjoyed the warmth of the Mediterranean. As the season shifts, September retains a high likelihood of clear skies, though it subtly hints at cooler days ahead. With the sun still shining brightly, this month is perfect for those looking to relish the tail end of summer before the more temperate October arrives at just 55%. Overall, September stands out as a golden opportunity to experience Rethymno’s beauty and charm under the sun.
In September, Rethymno, Greece, enjoys a delightful transition as daylight begins to wane slightly, offering around 12 hours of sunshine each day. This marks a subtle decline from the summer months, where daylight reached its peak at 14 hours in June and July. Following the sun-kissed warmth of August, September retains a generous amount of daylight, allowing residents and visitors to savor the lingering summer ambiance before the days grow shorter. As autumn approaches, the gradual decrease in daylight sets the stage for a cozy shift, with October further continuing this trend at 11 hours. This rhythm of light not only enhances outdoor activities but also invites an appreciation of the beautiful landscapes bathed in the softer hues of early fall.
As September arrives in Rethymno, Greece, the gentle embrace of the average wind speed settles at 2.5 m/s (6 mph), mirroring the consistent breeziness of the preceding months. This subtle shift in wind patterns, characteristic of late summer, encourages a serene atmosphere perfect for leisurely strolls along the coastline. Notably, the winds have shifted from a peak of 2.9 m/s (6 mph) in July to a more moderated pace, while still offering a refreshing respite from the warmth. As the days shorten and autumn approaches, the winds begin a gradual descent, hinting at the seasonal transition ahead. September, with its steady breezes, provides an idyllic backdrop for both relaxation and adventure amidst Rethymno’s stunning landscapes.
Weather in Rethymno varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rethymno, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January contrast sharply in terms of weather. In September, temperatures are warm, ranging from a minimum of 16°C (61°F) to a maximum of 31°C (88°F), with an average of 23°C (74°F). The month sees relatively low precipitation of 25 mm (1.0 in) over just three days, accompanied by a higher humidity of 74%. In stark contrast, January experiences much cooler conditions, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 21°C (70°F) and an average of 10°C (50°F). This winter month is notably wetter, receiving 89 mm (3.5 in) of rain over 15 days and slightly lower humidity at 71%. For more detailed information, check Rethymno weather in January.
September weather offers a warm and pleasant climate, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 31°C (88°F), making it an ideal time for outdoor activities. The humidity level is relatively high at 74%, but with only 25 mm (1.0 in) of precipitation over just 3 days, the likelihood of rain is low. In contrast, February brings cooler temperatures, with averages soaring only between 2°C (37°F) and 19°C (66°F). This month sees more significant precipitation, totaling 86 mm (3.4 in) over 10 days, coupled with a slightly lower humidity of 72%. For more detailed insights, you can check Rethymno weather in February. Overall, September is a time of warmth and sunshine, while February presents a much cooler and wetter landscape.
September and March present contrasting weather patterns. In September, temperatures are warm, ranging from a minimum of 16°C (61°F) to a maximum of 31°C (88°F), with an average of 23°C (74°F). The month experiences relatively low precipitation, totaling just 25 mm (1.0 in) over about 3 days, and maintains a consistent humidity level of 74%. In contrast, March is much cooler, with temperatures dipping as low as 2°C (36°F) and averaging 12°C (53°F), reaching up to 22°C (71°F). Precipitation in March is significantly higher at 67 mm (2.6 in) across approximately 9 days, but the humidity remains the same at 74%. For more detailed information about March weather, you can visit Rethymno weather in March.
When comparing the weather in September and April, notable differences emerge. September typically enjoys warmer temperatures, with an average of 23°C (74°F), peaking at 31°C (88°F), whereas April's average is cooler at 15°C (58°F), with a maximum of 26°C (79°F). Additionally, September experiences lower precipitation, totaling 25 mm (1.0 in) over just 3 days, compared to April’s 32 mm (1.3 in) spread across 5 days. Humidity levels are slightly higher in April at 78%, while September has a humidity of 74%. For a closer look at April weather specifics, check out Rethymno weather in April.
In comparing the weather between September and May, we see notable differences in temperature and humidity. September boasts a warmer climate, with average temperatures around 23°C (74°F) and highs reaching up to 31°C (88°F), while May is cooler, with an average of 19°C (67°F) and maximum temperatures hitting 35°C (94°F). Both months experience similar levels of precipitation, around 25 mm (1.0 in) over three days, but May tends to have higher humidity at 84% compared to September's 74%. For more detailed insights, you can explore Rethymno weather in May.
September and June both share similar average temperatures, hovering around 23°C (74°F), but the month of September features slightly higher maximum temperatures, reaching up to 31°C (88°F) compared to June's 31°C (89°F). In terms of precipitation, September experiences a bit more rainfall with 25 mm (1.0 in) over three days, while June has only 17 mm (0.7 in) across the same number of days. Humidity levels are also higher in June at 83%, compared to September's 74%, making June feel a bit more humid. For those interested in exploring the weather specifics for June, they can check Rethymno weather in June.
In comparison to July, September in Rethymno presents a slightly cooler climate, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 31°C (88°F). In July, the temperatures are warmer, with a range from 18°C (65°F) to a peak of 34°C (94°F), making July generally the hotter month. Additionally, September experiences more frequent rain, with 25 mm of precipitation over three days, while July is relatively dry, receiving only 8 mm over one day. The humidity also differs slightly, with September at 74% and July at a higher 81%. For more details on July weather, you can check Rethymno weather in July.
In August, temperatures were notably warmer, with a minimum of 20°C (68°F) and an average high of 34°C (93°F), resulting in a more intense heat, while September experienced a slight cooling with a minimum of 16°C (61°F) and an average high of 31°C (88°F). Despite being generally milder, September saw more rainfall with 25 mm (1.0 in) over 3 days, compared to August's minimal precipitation of just 3 mm (0.1 in) over 1 day. Additionally, humidity remained relatively high in both months, hitting 78% in August and 74% in September, contributing to a muggy feel. For more details on August weather, you can visit Rethymno weather in August.
September's weather tends to be warmer, with average temperatures around 23°C (74°F) and maximums reaching up to 31°C (88°F). The month experiences relatively low rainfall, accumulating only 25 mm (1.0 in) over just three days and maintaining a humidity level of 74%. In contrast, October sees a noticeable drop in average temperature to 19°C (67°F), with minimums dipping to 11°C (53°F). Rainfall increases significantly to 45 mm (1.8 in) over eight days, while humidity remains fairly consistent at 73%. For more details about the weather in October, you can check Rethymno weather in October.
September typically offers warm weather with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 31°C (88°F), averaging around 23°C (74°F). The month is relatively dry, with only 25 mm (1.0 in) of precipitation over about 3 days and a humidity level of 74%. In contrast, November brings a notable drop in temperatures, with a minimum of 8°C (47°F) and a maximum of 25°C (77°F), averaging just 16°C (61°F). This month sees significantly more rainfall, totaling 90 mm (3.6 in) over 12 days, and slightly lower humidity at 71%. For more detailed information on the weather in November, you can visit Rethymno weather in November.
September weather typically features warm temperatures, with a minimum of 16°C (61°F) and an average of 23°C (74°F), peaking at 31°C (88°F). This month experiences relatively low precipitation of 25 mm (1.0 in) over just 3 days, coupled with a humidity level of 74%. In contrast, December brings cooler conditions; the minimum temperature drops to 4°C (40°F), with an average of 12°C (54°F) and a maximum of 19°C (66°F). Rainfall significantly increases in December, totaling 115 mm (4.5 in) across 15 days, while humidity remains slightly lower at 71%. For more detailed information on the weather in December, you can check Rethymno weather in December.
As September ushers in a gentle transition from summer to autumn, Rethymno experiences a delightful blend of warm temperatures and a hint of humidity. With average highs reaching around 31°C (88°F), the days still retain a summer feel, yet the evenings cool down comfortably, inviting outdoor activities. Compared to the scorching peak summer months, September sees a slight increase in rainfall, with only about 25 mm over a handful of days, making it a splendid time for those seeking milder weather without sacrificing sun-soaked adventures. This balance of weather makes September an ideal choice for travelers looking to enjoy the picturesque landscapes of Crete. For a comprehensive look at what to expect throughout the year, visit Rethymno Climate.