Metrorail (Miami-Dade County) - Passenger ridership stats chart by month (2010-2017)

Sortable chart detailing monthly weekday ridership averages by Calendar Year; right hand chart giving annual averages may use "fiscal year" without disclosure, where the FY begins in October and has 75% of its time in the next year with only 25% in the starting year. Note the large jump in ridership starting September 2012 after the Orange Line extension to MIA opened, the largest project that came to fruition after the passing of the half-penny tax in 2002. Service frequency below Earlington Heights was doubled as a result, hence the ridership jumped by nearly 10,000, at least four times the ridership of the single new station at the Miami Intermodal Center (<2,000). Year averages are rounded to the nearest 500, and the highest month is also given in bold. A trend of lower ridership during the summer can be seen, when the traffic and population of the county (and state) is generally lower. The low December ridership anomaly may be explained by the long Christmas and holiday season. By 2016, ridership started to decrease, especially by summer, where July saw the lowest ridership since the Orange Line opened in 2012. This lag follows Metrobus, which began to decline in 2014, amid an aging fleet and falling oil and gas prices, and posted the lowest ridership numbers in over a decade during June and July 2016. For October 2016, even Metromover recorded low ridership, though the low numbers for this specific month were blamed on one day of closure for Hurricane Matthew.

Reference 1: January, February, March, April, May, June, July, August, September, October, November, December and Year Average.

Reference 2: 2010, 2011, 2012, 2013, 2014, 2015, 2016 and 2017.

Source: http://en.wikipedia.org/wiki/Metrorail_(Miami-Dade_County)