Kalymnos Weather

The weather in Kalymnos has mild and breezy winters and hot and dry summers in the remote villages, but the temperature falls as you move towards the mountainous inland.

In brief, the island is at its warmest in the summer months, while wintertime is mild with frequent rainfalls.
Kalymnos has pleasant, warm weather from late spring up until mid-fall! The peak season is in July and August, while most hotels are open between May and October.

Below, you can see the average temperatures in Kalymnos by month. We have also gathered information regarding the weather by month.

Average High & Low Air Temperature (in °C/°F)

 

Discover the weather in Kalymnos by month:
January | February | March | April | May | June | July | August | September | October | November | December

January is the year's coldest month for Kalymnos, with low temperatures and limited sunshine.

The average temperature is 11.1°C/52°F (maximum 13.9°C/57°F | minimum 8.3°C/47°F)
On the coldest nights, the temperature may drop to 7.1°C/44.8°F.
On the warmest days, the temperature may reach 21.4°C/70.5°F.
The sunshine lasts approximately 4.8 hours.
Humidity reaches 70%, while the mean speed of the wind is around 24 kph (14.9 mph).
The mean sea temperature is about 17.2°C/63°F; hence, the waters are quite cool.

February is slightly warmer, though rainfalls are still frequent and extreme cold temperatures are not that uncommon.

The average temperature is 12.5°C/54.5°F (maximum: 15°C/59°F | minimum 10°C/50°F).
On the coldest nights, the temperature may drop to 4.7°C/40.5°F.
On the warmest days, the temperature may reach 21.8°C/71.2°F.
The sunshine lasts approximately 5.4 hours.
Humidity reaches 71%, while the mean speed of the wind is around 24.5 kph (15.2 mph).
The mean sea temperature is about 16.1°C/61°F; hence, swimming is not recommended.

The temperatures during March are still on the cold side but the month offers more daytime sunlight to the island's residents.

The average temperature is 13.9°C/57°F (maximum 16.7°C/62°F | minimum 11.1°C/52°F).
On the coldest nights, the temperature may drop to 6.4°C/43.5°F.
On the warmest days, the temperature may reach 25.9°C/78.6°F.
The sunshine lasts approximately 6.4 hours.
Humidity reaches 68%, while the mean speed of the wind is around 22.7 kph (14.1 mph).
The mean sea temperature is about 16.1°C/61°F; hence, swimming is not recommended.

April is a warmer month, as Kalymnos hosts the first visitors of the season, usually because of Easter.

The average temperature is 16.7°C/62°F (maximum 20°C/68°F | minimum 13.3°C/56°F).
On the coldest nights, the temperature may drop to 12.2°C/54°F.
On the warmest days, the temperature may reach 27.8°C/82°F.
The sunshine lasts approximately 7.5 hours.
Humidity reaches 66%, while the mean speed of the wind is around 19.6 kph (12.2 mph).
The mean sea temperature is about 17.2°C/63°F; hence, the waters are quite cool.

Most early visitors arrive in Kalymnos during May, given that its climate is ideal and sunshine hours are enough for exploring the island! This month presents a solid, budget-friendly option for vacation in Kalymnos, with accommodation prices still relatively low!

The average temperature is 20.7°C/69.5°F (maximum: 24.4°C/76°F | minimum: 17.2°C/63°F).
On the coldest nights, the temperature may drop to 14.3°C/57.7°F.
On the warmest days, the temperature may reach 31.1°C/88°F.
The sunshine lasts approximately 9.2 hours.
Humidity reaches 66%, while the mean speed of the wind is around 17.4 kph (10.8 mph).
The mean sea temperature is about 18.9°C/66°F; hence, the waters are a bit cool.

June is a prime month for stopping by Kalymnos, with relatively high temperatures, decent sea warmth, and some last-minute accommodation options still available!

The average temperature is 24.4°C/76°F (maximum 28.3°C/83°F | minimum 20.6°C/69°F).
On the coldest nights, the temperature may drop to 19.1°C/66.4°F.
On the warmest days, the temperature may reach 38.6°C/101.5°F.
The sunshine lasts approximately 10.6 hours.
Humidity reaches 64%, while the mean speed of the wind is around 20.3 kph (12.6 mph).
The mean sea temperature is 21.7°C/71°F; hence, the waters are somewhat warm.

The high-season period of July is hectic for the island of Kalymnos, while temperatures rise over 30°C/86°F very frequently!

The average temperature is 26.9°C/80.5°F (maximum 31.1°C/88°F | minimum 22.8°C/73°F).
On the coldest nights, the temperature may drop to 22.6°C/72.7°F.
On the warmest days, the temperature may reach 40.6°C/105.1°F.
The sunshine lasts approximately 10.6 hours.
Humidity reaches 59%, while the mean speed of the wind is around 23.8 kph (14.8 mph).
The mean sea temperature is 23.3°C/74°F; hence, the waters are warm.

We recommend you book your ferry tickets and hotel room months in advance if you want to visit Kalymnos in August! The island reaches its peak temperatures during this month.

The average temperature is 27.5°C/81.5°F (maximum 31.7°C/89°F | minimum 23.3°C/74°F).
On the coldest nights, the temperature may drop to 23.2°C/73.8°F.
On the warmest days, the temperature may reach 35.8°C/96.4°F.
The sunshine lasts approximately 10.4 hours.
Humidity reaches 62%, while the mean speed of the wind is around 23.3 kph (14.5 mph).
The mean sea temperature is 24.4°C/76°F; hence, the waters are very warm.

Visit Kalymnos in September to enjoy medium-hot temperatures, lots of sunshine, and lower hotel prices!

The average temperature is 24.7C/76.5°F (maximum 28.3°C/83°F | minimum 21.1°C/70°F).
On the coldest nights, the temperature may drop to 20°C/68°F.
On the warmest days, the temperature may reach 36.1°C/97°F.
The sunshine lasts approximately 9 hours.
Humidity reaches 65%, while the mean speed of the wind is around 21.4 kph (13.3 mph).
The mean sea temperature is 23.9°C/75°F; hence, the waters are quite warm.

October is quite a warm month, but most shops and rooms for rent are now closed for the year.

The average temperature is 20.8°C/69.5°F (maximum 23.9°C/75°F | minimum 17.8°C/64°F).
On the coldest nights, the temperature may drop to 17°C/62.6°F.
On the warmest days, the temperature may reach 28.7°C/83.7°F.
The sunshine lasts approximately 7.1 hours.
Humidity reaches 68%, while the mean speed of the wind is around 20.4 kph (12.7 mph).
The mean sea temperature is 22.2°C/72°F; hence, the waters are a little warm.

November offers a great range of temperatures, though most people on the island are now the permanent residents.

The average temperature is 17.2°C/63°F (maximum 20°C/68°F | minimum 14.4°C/58°F).
On the coldest nights, the temperature may drop to 8.7°C/47.7°F.
On the warmest days, the temperature may reach 26.7°C/80.1°F.
The sunshine lasts approximately 5.5 hours.
Humidity reaches 70%, while the mean speed of the wind is around 21.9 kph (13.6 mph).
The mean sea temperature is 20°C/68°F; hence, the waters are a little on the cold side.

December in Kalymnos is a colder month, with increased chances of rain, cold sea waters, low temperatures, and few to no visitors.

The average temperature is 13.1°C/55.5°F (maximum 15.6°C/60°F | minimum 10.6°C/51°F).
On the coldest nights, the temperature may drop to 10.4°C/50.7°F.
On the warmest days, the temperature may reach 21.8°C/71.2°F.
The sunshine lasts approximately 4.4 hours.
Humidity reaches 70%, while the mean speed of the wind is around 23.5 kph (14.6 mph).
The mean sea temperature is about 18.3°C/65°F; hence, the waters are a bit cool.