Oristano is the capital of the Oristano province in the west central area of the island of Sardinia. It's known for its medieval Carnevale festival called Sartiglia.
As you can see from the historic temperature charts, the warm weather builds gradually, then jumps in June. But overall, summer temperatures are moderate, compared to the south of Sardinia. May through October is ideal for those who like warmer climes, but March and April aren't too bad for those who like cooler temperatures.
Sartiglia, with events on the last Sunday and the Tuesday of Carnival, comes at a time of cool temperatures with a small possibility of precipitation.
Oristano is a city located on the river Tirso. It has a train station in Piazza Ungheria.
The unique archaeological museum called the Antiquarium Arborense is found in Palazzo Parpaglia in the Piazza Corrias
Oristano is served by the Oristano-Fenosu Airport, located about 3 km east of Oristano. The airport hosts flights from Rome and Milan.
The Phoenician-Roman Port ruins of Tharros are near Oristano. The complex was abandoned in about 1000 Ad, and fronts on the Mediterranean Sea. It's quite a spectacular archaeological site.
Also nearby is the little San Salvatore de Cabras, a town in the interesting Sinis Peninsula that's been the setting for many spaghetti westerns but also features a 4th century hypogeum under the parish church. See: San Salvatore
A bit south of Bosa is the little village of Milis, known for its traditional costume (there's a museum) and oranges.
For the dates of Sartiglia, see the official site: Sartiglia.
Sardinia is home to some of the most unique festivals in Europe, and one of the best Sardinian festivals.