On the Balearic Islands, the climate is Mediterranean, with mild winters and hot, sunny summers, a bit sultry but tempered by sea breezes. At sea level, the daily average temperature ranges from 9/11 °C (48/52 °F) in January and February to about 24/24.5 °C (75/76 °F) in July and August. Rainfall is generally not abundant, since it amounts to 400/450 mm (15.5/17.5 in) per year on the coast, and follows the Mediterranean pattern, so it is more common in autumn and winter, and decreases gradually during spring, reaching a low in summer, when it almost never rains.
Here is the average precipitation in Formentera.
Formentera - Average precipitation

Being exposed to the wind that blows from France, the Balearic Islands are pretty windy, especially from October to April. In summer, sea breezes blow, but they are welcome because they make the heat more bearable.

In addition to these general features, there are some differences that are worthy of note:

- The easternmost islands (Mallorca and Menorca), being closer to France, are the windiest ones.
- Mallorca (or Majorca) is a bit more continental, that is, a bit colder in winter and warmer in summer. This happens both because it is larger and because there's a mountain range in the north, Sierra de Tramontana, which somehow isolates the inland plain. This mountain range, whose highest peak is Puig Major, 1,445 meters (4,741 feet) high, is wetter and greener: precipitation reaches 1,200 millimeters (47 inches) per year, and in winter, it can snow.
Here are the average temperatures of Palma de Mallorca.
Palma - Average temperatures
Min (°C)445711151718161285
Max (°C)151617192327313128231916
Min (°F)393941455259636461544641
Max (°F)596163667381888882736661

- Menorca (or Minorca), the easternmost island, is the rainiest, at least at sea level: rainfall reaches 600 mm (23.5 in) per year, although there are no hills or mountains. Usually, the difference is noticeable especially in autumn, when the rains can sometimes be abundant.
- Formentera and Ibiza, the southernmost and farthest from France, are slightly milder and less windy in the cold half-year.
Here are the average temperatures of Ibiza.
Ibiza - Average temperatures
Min (°C)88910131720211915119
Max (°C)151517182226292927231916
Min (°F)464648505563687066595248
Max (°F)595963647279848481736661

The amount of sunshine on the Balearic Islands is not bad, in fact, some sunny day can occur all year round, although it is better, as happens in Mediterranean climates, in late spring and summer, especially from May to August, when sunny days prevail.
Here, for example, are the average daily sunshine hours in Minorca.
Minorca - Sunshine

Palma de Mallorca, beach

The temperature of the sea is fairly uniform in the archipelago; the sea is warm enough for swimming from July to September, while it is cool in June and October. Here are the temperature of the sea in Ibiza.
Ibiza - Sea temperature
Temp (°C)151415161821242624221916
Temp (°F)595759616470757975726661

In Menorca, the most northern and most exposed to the north wind, the sea is just less warm in summer: it reaches 25 °C (77 °F) in August.

Best Time

The best time for a beach holiday at the Balearics is the summer, from June to mid-September. The water temperature is comfortable enough July to September, although in September, which overall is still a good month (especially in the first half), the first Atlantic disturbances begin to affect the islands. May and June are sunny months, but the sea is still a bit cool, especially in May, when it is actually a bit cold, and sometimes, the air can be a little cold as well.

April and May are suitable months for visiting the islands and their cities, while in summer, it can sometimes be too hot for hiking. In October and November, temperatures are mild, but the days are shorter and the weather can be rainy and windy.

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