Birmingham, like all cities in England, has a mild oceanic climate, which is characterised by the changing of the four seasons.
The differences between winter and summer are less than in continental or southern Europe, for example. Extreme weather (whether extreme heat or severe cold) is rare.
Normal summer temperatures rise to around 20 to 24 °C.
In winter, expect temperatures between 4 and 7 °C. It rarely freezes or snows, and most precipitation, even during winter, falls as rain.
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When does it rain the most?
England has a reputation for having consistently bad weather.
Compared to the rest of Europe, Birmingham gets average but steady rain throughout the year. There is no period of the year when it doesn't rain at all, but equally there is no period of the year when it is guaranteed to rain.
Showers are rather weak and on average occur 10-12 days each month throughout the year.
The likelihood of rain is a little higher in October to January, but the differences between spring or summer are not significant.
Especially in autumn and winter, morning fogs occur and may persist into the afternoon.
Table of temperatures during the year
Birmingham - Temperatures during the year
When to go to Birmingham
Birmingham is a purely urban destination with plenty of indoor activities.
So you can visit all year round.
If long walks along the local canals are your goal in Birmingham, then May-October is the best time of year for pleasant temperatures.