Pisa, where it's located

The climate of Pisa is Mediterranean, with mild, relatively rainy winters and hot, sunny summers.
The city is located in the north of Tuscany, 10 km (6 miles) from the coast.
The average temperature of the coldest month (January) is of 6.9 °C (44 °F), that of the warmest month (August) is of 24 °C (75 °F). Here are the average temperatures.
Pisa - Average temperatures
Min (°C)335811151818151284
Max (°C)111215182327303026211612
Min (°F)373741465259646459544639
Max (°F)525459647381868679706154

Precipitation amounts to 910 millimeters (36 inches) per year: so, it is at an intermediate level. It ranges from 25 mm (1 in) in the driest month (July) to 145 mm (5.7 in) in the wettest (November).
Snow in Pisa is very rare, not only because the climate is mild, but also because with the cold wind blowing from the north-east, the weather is dry.
Here is the average precipitation.
Pisa - Average precipitation

On average, there are around 2,430 sunshine hours per year. Here are the average sunshine hours per day.
Pisa - Sunshine

The sea temperature ranges between 13 °C (55 °F) and 25 °C (77 °F). The sea is warm enough for swimming from July to September. Here are the average sea temperatures.
Pisa - Sea temperature
Temp (°C)141314151821242523201715
Temp (°F)575557596470757773686359


Best Time

The best times to visit Pisa are spring and autumn, ie from mid-April to mid-June and from September to early October. In June, the weather is often nice, but it can sometimes be hot, especially in the second half of the month.
The best months to go to the beach are July and August. In June, the sea is still a little cool.