Vaisala - Company Announcement

Vaisala's January-March 2013 Results Published on April 24, 2013

Vaisala Corporation         Stock Exchange Release           April 17, 2013 at
2:00 p.m.

Vaisala publishes its January-March 2013 results on Wednesday, April 24, 2013 at
2 p.m. (EEST). The stock exchange release and interim report will be available
on Vaisala's website at www.vaisala.com. The CEO's presentation will be
published at www.vaisala.com/investors at 4 p.m. (EEST) on the same day.

Briefing
Briefing for analysts and media will be arranged in Hotel Kämp, Paavo Nurmi
meeting room, Pohjoisesplanadi 29, Helsinki, on Wednesday, April 24, 2013
starting at 4 p.m. (EEST). Please register to the briefing by e-mail to
liisa.ahtiluoto@vaisala.com.

The presentation of Kjell Forsén, President and CEO, at the briefing will be
audiocast live at www.vaisala.com/investors. It will also be published at the
same address as a recording by 6 p.m. (EEST) on the same day.

More information:
Liisa Ahtiluoto, Communications Director
Tel. +358 40 730 7695

Vaisala is a global leader in environmental and industrial measurement. Building
on 75 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 chosen weather-related and industrial markets.
Headquartered in Finland, Vaisala employs approximately 1400 professionals
worldwide and is listed on the NASDAQ OMX Helsinki stock exchange.
www.vaisala.com   www.twitter.com/VaisalaGroup

Distribution:
OMX Nordic Exchange Helsinki
Main media
www.vaisala.com


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