Treviso, where it's located

The climate of Treviso is moderately continental, with cold, damp winters and hot, muggy summers.
The city is located in the Venetian plain, 20 km (12 mi) from Venice. The climate is similar to that of the Po valley, with respect to which it is a bit milder in winter, but also a little more windy, given that it is exposed to both the bora (cold, dry north-east wind) and the sirocco (mild south-east wind).
The average temperature of the coldest month (January) is of 3.2 °C (38 °F), that of the warmest month (July) is of 23.3 °C (74 °F). Here are the average temperatures.
Treviso - Average temperatures
Min (°C)-10471216181814940
Max (°C)7101417232629292419128
Min (°F)303239455461646457483932
Max (°F)455057637379848475665446

Precipitation amounts to 895 millimeters (35.2 inches) per year: so, it is at an intermediate level. It ranges from 55 mm (2.2 in) in the driest months (January, February) to 105 mm (4.1 in) in the wettest (June). Here is the average precipitation.
Treviso - Average precipitation


Best Time

The best period to visit Treviso is that of spring and early summer, and in particular, from mid-April to mid-June. September, too, is a good month. However, you have to take into account some rainy days in both periods.
Summer can be hot, although some days can be acceptable, especially in June. In summer, and sometimes in May, sudden thunderstorms in the afternoon or evening must be put into account.