How to counter Yunara
Let us take a look on how to beat Yunara. We will look at champions who are strong against Yunara and who are weak against Yunara. Use win rate, gold difference and creep score difference at minute 10 to find the best 
Adc champion who counters Yunara. You can already win in champion select with the right counters for Yunara. If you want to know how to counter Yunara then you need to take into account the best picks vs Yunara and the worst picks vs Yunara. This Yunara counter data is based on matches played by Pros on patch 15.14 and previous ones. It is important to see whether Pros counter picked Yunara or whether they played as Yunara.
Champions used by Pros to counter pick Yunara
Looking at the matches from Pros (see table Pros counter picked Yunara) we can see that they picked 
Lucian most often to counter pick Yunara. The matchup Lucian vs Yunara occured 7 times. Yunara has 4 wins and 3 losses in this matchup. Learn how to counter pick Lucian to get another perspective on the data.
Lane outcome for Yunara
When looking at Yunara counters you will notice that win rates alone are not conclusional. Therefore we provide an overview (see table Lane Outcome) where you can see the lane outcome of Pros who played Yunara. The lane outcome of Yunara consists of three outcomes: Win, Loss or Draw. Let's take a look of Yunara lane and match outcome for specific matchups. Considering the lane outcome and the match outcome of a specific matchup, might enable you to find the right counter for Yunara.
Conclusion
Analyze the available data and learn how to beat Yunara. To master Yunara take also a look on Yunara builds and runes for Yunara. Good luck, Summoner!