"monthly data" is correct and usable in written English.
For example, you could use it in a sentence such as: "We looked at the monthly data to identify any trends in our sales numbers."
The monthly data are not seasonally adjusted.
"The monthly data is very volatile.
At meetings, members compare their monthly data sheets.
Monthly data for 10,200 cities are provided at weatherbase.com.com
"I wouldn't overreact to monthly data if I were you.
And it's important to remember that monthly data are noisy.
Thirty meg up and down speeds, unlimited monthly data, no connection fee... they've been incredible.
He sends his monthly data to the Harvard School of Public Health and some 400 local allergists.
More significant than these momentary fluctuations are the daily and monthly data, which reflect long-term effects on people's health.
Using data from ComScore, which provides monthly data on US smartphone users, we can get close to a figure.
T-Mobile subscribers can add a $29.99 monthly data plan for unlimited surfing at T-Mobile Wi-Fi hot spots.
