Climate Insights for Rethymno

The climate in Rethymno is warm and mild. The average annual temperature is 19°C and approximately 677mm of precipitation falls per year. December is the wettest month, receiving around 134mm of rainfall. Rethymno is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, March, when temperatures can drop to 11°C.

Rethymno sees moderate temperature variation throughout the year, ranging from 11°C to 26°C. The warmest month is August, when average highs reach 26°C and the mean temperature sits around 26°C. January is the coolest month, with minimum temperatures around 11°C and an average of 12°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between May and June, with a 4°C shift in average temperatures.

Rethymno is a relatively dry area, receiving approximately 677mm of precipitation annually, which averages out to around 56mm per month. The wettest month is December, averaging 134mm of rainfall. January and November also tend to see above-average precipitation. The driest month is July, with just 5mm. That's 129mm less than December, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Rethymno is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

It is currently summer in Rethymno, which began on June 21, 2026. Rethymno is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 26°C, while the coldest stretch bottoms out in January near 11°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.

The best time to visit Rethymno is during April, May, June, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 28mm per month. By contrast, August can be uncomfortably hot with highs reaching 26°C, while January is the coldest period with lows dropping to 11°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Rethymno based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.