Rethymno climate — normals and trends
Rethymno (Greece) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.8 °C and it receives 558 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (24.5 °C on average) and the coldest is January (9.7 °C). Rainfall peaks in December.
Rethymno averages 0 frost days, 14 hot days (≥ 30 °C) and 87 rainy days per year.
Rethymno has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.2 °C (on 21 August 1945) and the coldest -3.4 °C (on 20 February 1983).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
RethymnoCrete
- coords
- 35.37°, 24.48°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.8°C
Average daily high
19.7°C
Average daily low
14.1°C
Annual rainfall
558mm
Sunshine / day
10.9h
Mean relative humidity
70%
Average peak wind
12.4km/h
Seasonal range
14.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
14 d/yr
Rainy days (≥ 1 mm)
87 d/yr
Annual snowfall
2.9 cm
Average feels-like high
19.4 °C
Average feels-like low
13.2 °C
Average peak gust
40.2 km/h
Tropical nights (≥ 20 °C)
76 d/yr
Solar radiation
18.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.51 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
39.2 °C
21 August 1945
Coldest day
-3.4 °C
20 February 1983
Wettest day
70 mm
15 October 2022
Windiest day
37.5 km/h
10 April 2015
Strongest gust
117.7 km/h
28 February 1990
Hottest feels-like
40.4 °C
13 June 2024
Coldest feels-like
-7.3 °C
20 February 1983
Snowiest day
8.2 cm
18 January 1949
Sunniest day
14.0 h
25 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 15.0 °C | +2.8 °C | 46 mm | -53 mm |
| Feb | 11.1 °C | -1.3 °C | 71 mm | -14 mm |
| Mar | 16.6 °C | +2.7 °C | 35 mm | -32 mm |
| Apr | 17.0 °C | -0.2 °C | 60 mm | +26 mm |
| May | 22.6 °C | +0.8 °C | 44 mm | +24 mm |
| Jun | 26.5 °C | +0.5 °C | 3 mm | -3 mm |
| Jul | 30.1 °C | +2.6 °C | 0 mm | -2 mm |
| Aug | 28.0 °C | +0.5 °C | 3 mm | -0 mm |
| Sep | 25.5 °C | +0.3 °C | 1 mm | -17 mm |
| Oct | 21.6 °C | +0.2 °C | 19 mm | -34 mm |
| Nov | 19.3 °C | +1.9 °C | 38 mm | -32 mm |
| Dec | 15.1 °C | +1.4 °C | 80 mm | -19 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Rethymno?
Rethymno has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.8 °C and it receives 558 mm of precipitation per year.
What is the hottest day ever recorded in Rethymno?
The hottest day measured in Rethymno between 1940 and 2025 was 21 August 1945, reaching 39.2 °C.
What is the coldest day in Rethymno?
The coldest day measured in Rethymno between 1940 and 2025 was 20 February 1983, at -3.4 °C.
Does it snow in Rethymno?
Yes. Rethymno gets on average 2.9 cm of snow per year and has around 0 frost days.
Has the climate of Rethymno warmed?
Yes: Rethymno warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rethymno?
The wettest day measured in Rethymno between 1940 and 2025 was 15 October 2022, with 70 mm of rain in 24 hours.
What was the windiest day in Rethymno?
The windiest day measured in Rethymno between 1940 and 2025 was 10 April 2015, with winds reaching 37.5 km/h.
What is the warmest month in Rethymno?
The warmest month in Rethymno is July (24.5 °C on average); the coldest is January (9.7 °C).
How much does it rain in Rethymno?
Rethymno receives on average 558 mm of precipitation per year, spread over about 87 rainy days.
Is it sunny in Rethymno?
Rethymno gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
What is the biggest single-day snowfall in Rethymno?
The heaviest 24-hour snowfall measured in Rethymno between 1940 and 2025 was 18 January 1949, with 8.2 cm.
Are there tropical nights in Rethymno?
Yes: Rethymno has on average 76 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rethymno?
In Rethymno, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 13 June 2024, and the lowest was -7.3 °C on 20 February 1983.
Compare Rethymno with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rethymno