Cannes, where it's located

The climate of Cannes is Mediterranean, with mild, relatively rainy winters and hot, sunny summers, sometimes sultry, but tempered by the breeze.
The city is located on the Cote d'Azur, south-west of Nice.
The average temperature of the coldest month (January) is of 8.4 °C (47 °F), that of the warmest month (August) is of 23.3 °C (74 °F). Here are the average temperatures.
Cannes - Average temperatures
Min (°C)446913161919161285
Max (°C)131415172124282825211714
Min (°F)393943485561666661544641
Max (°F)555759637075828277706357

Precipitation amounts to 755 millimeters (29.7 inches) per year: so, it is at an intermediate level. It ranges from 15 mm (0.6 in) in the driest month (July) to 120 mm (4.7 in) in the wettest (October). Here is the average precipitation.
Cannes - Average precipitation

On average, there are around 2,740 sunshine hours per year. Here are the average sunshine hours per day.
Cannes - Sunshine

The sea temperature ranges between 13 °C (55 °F) and 23 °C (73 °F). The sea is therefore never very warm, but it becomes altogether acceptable for swimming in July and August. Here are the average sea temperatures.
Cannes - Sea temperature
Temp (°C)131313141619222321191614
Temp (°F)555555576166727370666157


Best Time

The best time to visit Cannes is the spring, from mid-April to mid-June. September is also a good month, but it is quite rainy. Summer, from mid-June to August, can be hot and muggy, even though it's the best time for those who also want to swim in the sea. Winter is generally mild, but it can sometimes get cold and it can rain.