Yes, thankfully. It is simple and easy.
"Use periodic account statements to determine the maximum value [over the calendar year] in the currency of the account. Convert to U.S. dollars using the end of the calendar year exchange rate and report in U.S. dollars.
Use the Treasury End-of-Calendar-Year rate for FBAR and IRS Form 8938."
Quoted from here:
Comparison of Form 8938 and FBAR Requirements | Internal Revenue Service (irs.gov)
You see now why you have absolutely no need for daily exchange rates.
