Auditor's report

(Translation from the Finnish Original)

To the Annual General Meeting of Vaisala Corporation

We have audited the accounting records, the financial statements, the report of the Board of Direc-tors and the administration of Vaisala Corporation for the year ended on December 31 , 2008. The financial statements comprise the consolidated balance sheet, income statement, cash flow state-ment, statement of changes in equity and notes to the consolidated financial statements, as well as the parent company's balance sheet, income statement, cash flow statement and notes to the financial statements.

Responsibility of the Board of Directors and the President and CEO

The Board of Directors and the President and CEO are responsible for the preparation of the fi-nancial statements and the report of the Board of Directors and for the fair presentation of the con-solidated financial statements in accordance with International Financial Reporting Standards (IFRS) as adopted by the EU, as well as for the fair presentation of the parent company’s financial statements and the report of the Board of Directors in accordance with laws and regulations gov-erning the preparation of the financial statements and the report of the Board of Directors in Finland. The Board of Directors is responsible for the appropriate arrangement of the control of the company’s accounts and finances, and the President and CEO shall see to it that the accounts of the company are in compliance with the law and that its financial affairs have been arranged in a reliable manner.

Auditor’s Responsibility

Our responsibility is to perform an audit in accordance with good auditing practice in Finland, and to express an opinion on the parent company’s financial statements, on the consolidated financial statements and on the report of the Board of Directors based on our audit. Good auditing practice requires that we comply with ethical requirements and plan and perform the audit to obtain reason-able assurance whether the financial statements and the report of the Board of Directors are free from material misstatement and whether the members of the Board of Directors of the parent com-pany and the President and CEO have complied with the Limited Liability Companies Act.

An audit involves performing procedures to obtain audit evidence about the amounts and disclo-sures in the financial statements and the report of the Board of Directors. The procedures selected depend on the auditor’s judgment, including the assessment of the risks of material misstatement of the financial statements, whether due to fraud or error. In making those risk assessments, the auditor considers internal control relevant to the entity’s preparation and fair presentation of the financial statements in order to design audit procedures that are appropriate in the circumstances. An audit also includes evaluating the appropriateness of accounting policies used and the reason-ableness of accounting estimates made by management, as well as evaluating the overall presen-tation of the financial statements and the report of the Board of Directors.

The audit was performed in accordance with good auditing practice in Finland. We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our audit opin-ion.

Opinion on the Consolidated Financial Statements

In our opinion, the consolidated financial statements give a true and fair view of the financial posi-tion, financial performance, and cash flows of the group in accordance with International Financial Reporting Standards (IFRS) as adopted by the EU.

Opinion on the Company’s Financial Statements and the Report of the Board of Directors

In our opinion, the financial statements and the report of the Board of Directors give a true and fair view of both the consolidated and the parent company's financial performance and financial posi-tion in accordance with the laws and regulations governing the preparation of the financial state-ments and the report of the Board of Directors in Finland. The information in the report of the Board of Directors is consistent with the information in the financial statements.

Vantaa, February 12, 2009

PricewaterhouseCoopers Oy
Authorised Public Accountants

Mikko Nieminen, Authorised Public Accountant
Hannu Pellinen, Authorised Public Accountant