By the time you have looked through the table you will know what weather to expect in July and what type of clothes to bring on your holiday. To see my weather log for other months in Barcelona or to see the current weather conditions please refer to our Related Pages section at the foot of this page where you will find links to these pages. Summary of temperatures and weather in July: Average temperature: 29° C or 84.2 F Maximum temperature: 33° C or 91.4 F