The British weather is renown throughout the world for being very interchangeable & unpredictable, rain is quite frequent so it's a good idea to carry an umbrella or coat with you when your out & about.
Climate in Bristol
Temperatures in Bristol range from 2.3 to 20.95 (Celcius).
Temperature
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Rainfall in Bristol varies from 138.0 to 321.0 (mm/month).