Climate data for Mecca Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Mean daily daylight hours 11.0 11.0 12.0 13.0 13.0 13.0 13.0 13.0 12.0 12.0 11.0 11.0 12.1 Average Ultraviolet index 7 9 11+ 11+ 11+ 11+ 11+ 11+ 11+ 10 8 7 9.8 Source: Weather Atlas [4]