Vaisala Oyj

Pre-Annual General Meeting Information • Feb 27, 2008

Disclosure 255772

Vaisala - Notice to general meeting

Invitation to the Annual General Meeting of Vaisala

Vaisala Oyj's Annual General Meeting will be held on Thursday March 27, 2008, at 6 p.m. at the company's head office, Vanha Nurmijärventie 21, 01670 Vantaa. Agenda of the Annual General Meeting Items specified in Article 13 of the Articles of Association. Right of attendance Shareholders who are registered in the company's share register maintained by the Finnish Central Securities Depository Ltd by 17 March 2008 may attend the Annual General Meeting. Shareholders whose shares have not been transferred to the book-entry securities system may also attend the Annual General Meeting provided that such shareholders were registered in the company's share register before 21 October 1994. In such cases, shareholders must present evidence that their shareholding rights have not been transferred to the book-entry securities system. Documentation Documents relating to financial statements and the Board's proposals to the Annual General Meeting are available as copies for the shareholders to see at the company's head office in Vantaa, Vanha Nurmijärventie 21, for a week before the Annual General Meeting. On request, copies will be sent to shareholders. Notice of attendance Shareholders wishing to attend the Annual General Meeting must notify the company no later than 4 p.m. on Tuesday 18 March 2008. Notification can be made either by letter addressed to Vaisala Oyj, Nina Andersin, P.O.Box 26, FIN-00421 Helsinki, Finland, by telefax to +358 9 8949 2206, by e-mail at nina.andersin@vaisala.com, or by telephone on weekdays between 9 to 11 a.m., tel. +358 9 8949 2201. Letter authorizing a proxy to vote on behalf of a shareholder should be sent to the company before expiry of the notification. Distribution of profit and remuneration to the members of the Board The Board of Directors proposes to the Annual General Meeting a dividend of EUR 0.85 per share for 2007. The dividend will be paid to shareholders registered in the Register of Shareholders held by the Finnish Central Securities Depository Ltd on the record date April 1, 2008. The Board proposes that the dividend be paid on April 8, 2008. The Board proposes to the Annual General Meeting that the remuneration payable to the members of the Board of Directors to be elected at the Annual General Meeting for the term until the close of the Annual General Meeting in 2009 be as follows: EUR 35.000 for the Chairman and EUR 25.000 for each member. Election of the members of the Board of Directors and auditors Board members Mikko Niinivaara and Raimo Voipio are in turn to retire by rotation. Shareholders representing more than 10 percent of all the votes in the company have informed that they will propose to the Annual General Meeting held on 27 March 2008 the re-election of Mikko Niinivaara and Raimo Voipio. The Board proposes PricewaterhouseCoopers Oy and Mr Hannu Pellinen APA, to be selected as Vaisala Oyj's Authorized Public Accountants. The proposed members of the Board of Directors and the Authorized Public Accountants have given their consent for the election. Vantaa February 13, 2008 Vaisala Oyj Board of Directors