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.
1 * Average high temperatures range from 20Â°C/69Â°F in Northeast Spain to 25Â°C/77Â°F in Southern Spain. * 2  Average rainfall ranges from 599 mm/24 inches per year in the Balearic Islands to 1,909 mm/75 inches per year in Northwest Spain. *  Sea temperatures range from 16Â°C/61Â°F to 23Â°C/74Â°F.