December in Cranston averages a daily high of 6.4°C with nights around -2.3°C. Expect roughly 12 wet days totalling 120.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Cranston is May–September.
Based on RHODE ISLAND T.F. GREEN INTERNATIONAL AIRPORT, RI US (6.4km), 1995–2024. 30 years of December data.