Vaisala's Interim Report January-March 2017 to be

Vaisala Corporation Press Release April 5, 2017 at 4:00 p.m.

Vaisala's Interim Report January-March 2017 to be published on April 25, 2017

Vaisala Corporation will publish its Interim Report January-March 2017 on Tuesday, April 25, 2017 at about 2:00 p.m (Finnish time). The report will be available at www.vaisala.com/investors. The President and CEO's presentation will be published at 4:00 p.m. on the same day at www.vaisala.com/investors.

Telephone Conference An English-language conference call for analysts, investors and media will be held on the same day starting at 4:00 p.m. (Finnish time). Numbers for conference call, during which questions may be presented, are:

Finland: +358 9 8171 0495 UK: +44 20 3194 0552 Sweden: +46 8 5664 2702 US: +1 85 5716 1597

Audiocast The presentation by Kjell Forsén, President and CEO, can also be followed through a live audiocast at www.vaisala.com/investors starting at 4:00 p.m. A recording will be published at the same address by 6:00 p.m.

More information Paula Liimatta, Business Controller and Head of Investor Relations Tel. +358 40 580 3521 Vaisala Corporation

Distribution Key media www.vaisala.com

Vaisala is a global leader in environmental and industrial measurement. Building on 80 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 1,600 professionals worldwide and is listed on the Nasdaq Helsinki stock exchange. www.vaisala.com      www.twitter.com/VaisalaGroup