Most save the date cards will not require more than a typical forever stamp (first class) when you are mailing with the US postal service, because they are usually fairly small (5x3.5 inches, 5.5x4.25 inches) and will weigh under an ounce.
Day by Day weather log for Barcelona Weather in September. September 30. Daily Comment: Temperature 25Â° C around 77 F Warm and sunny light cloud at times but generally clear skies. Day 29. Daily Comment: Temperature 25Â° C around 77 F warm and sunny. A little light cloud at times from 15:00 onwards.
CLIMATE: AVERAGE MONTHLY WEATHER IN Barcelona, Spain. 1  With an humid subtropical climate the best time to visit Barcelona is from May to the end of July and the whole month of September. August is generally very hot (with occasional peaks of 34 Â° Celsius, 95 Fahrenheit or higher) and humid.