Yes, if you are filing a resident tax return (Form 1040), you need to report your worldwide income, including interest income. Foreign banks do not issue Form 1099-INT, Hence you need  to report that interest as if you received a Form 1099-IN.

If you need exchange rates, please use the IRS website link: https://www.irs.gov/Individuals/International-Taxpayers/Yearly-Average-Currency-Exchange-Rates

Also remember to say "yes" or check the box when the tax applications ask "Owned or signed on a foreign bank, broker, or other financial account." If at any time during tax year you did not have equivalent of $10,000 or more on your bank account(s), then there will be no additional filing requirements.