In October, the weather in Upplands-Bro is typically cold. Average daily high temperature in October is about 9 degrees above zero. On average, Upplands-Bro has 10 cloudy, 9 rainy, 8 partly cloudy, and 4 sunny days in October. The rains are usually moderate. October as well as January, February, March, and April is considered the most uncomfortable time to visit Upplands-Bro.