Vaisala Stock Exchange Release 29.10.2010 at 11:00 a.m. Vaisala publishes its Q3/2010 results on Friday November 5, 2010 at 9:00 a.m. The stock exchange release will be available on the company website at www.vaisala.com. CEO's presentation will be published at 12.00 noon (GMT +2) on the same day at www.vaisala.com/investors. Briefing Briefing for analysts and media will be arranged in Hotel Kämp, Paavo Nurmi meeting room, Pohjoisesplanadi 29, starting at 12.00 noon. Please register to the briefing by email to liisa.ahtiluoto@vaisala.com. Audiocast A live audiocast of the presentation of Kjell Forsén, President and CEO of Vaisala, will be sent starting at 12.00 am (GMT +2). The audiocast will be available atwww.vaisala.com/investors. It will be recorded and published at the same address by 2.00 p.m. (GMT +2) on the same day. More information: Liisa Ahtiluoto, Communications Manager, liisa.ahtiluoto@vaisala.com, tel. +358 40 730 7695 --------------- Vaisala is a global leader in environmental and industrial measurement. Building on more than 70 years of experience, Vaisala contributes to a better quality of life by providing a comprehensive range of innovative observation and measurement products and services for meteorology, weather critical operations and controlled environments. Headquartered in Finland, Vaisala employs over 1400 professionals worldwide and is listed on the NASDAQ OMX Helsinki. www.vaisala.com [HUG#1456989]