Jinx's ultimate does less damage the closer you are to her.
Jinx's minigun takes time to ramp up. If you see her poking with rockets try to jump on her and burst her down.
Jinx's snare grenades have a long cooldown and are her primary means of protecting herself. If she misses with them she will have a hard time escaping if engaged upon.
The stats provided here show several critical Yuumi vs. Jinx matchup stats that may help you appreciate the distinctions between the two. As an example, Yuumi’s KDA ratio ([kills + assists] / deaths) of NaN is more than Jinx’s KDA ratio of NaN, demonstrating that Yuumi may be more central to her team's team fighting potential than Jinx. This observation is in large part caused by the differences in assists.
Yuumi normally has a significantly smaller longest kill spree than her foe does. Commonly, she takes less damage than Jinx. This commonly reflects differing health capacities; however, it can also illustrate that the champion with more HP has less agility and thus is not able to flee from additional damage when poked or engaged.
Both League champions are great. Both have their pros and cons. In League's current meta, Yuumi usually loses when taking on Jinx, with a 42.5% win rate. Therefore, Yuumi makes a bad counter to Jinx.
While Yuumi does have a much lower winrate compared to Jinx, when facing one another, Yuumi also has a much lower learning curve that makes her a less complex character to develop with. You should be very concerned when picking Yuumi into Jinx.
Moreover, Yuumi also has a great amount of CC and other utility, a similar amount to Jinx. This makes her just as valuable during teamfights, especially when facing champions with a lot of burst damage.
While there is not a single best champion for every situation in League of Legends, in Yuumi vs Jinx matchups, Jinx is the better champ with a much lower win rate, less champion complexity, and a similar amount of utility to help out your teammates during teamfights.
Yuumi is a garbage counter to Jinx. Make sure you focus your strategy on keeping up your gold income and clearing objectives. If you are able to do that, you should be able to stand on your own as Yuumi against Jinx.
To truly master Yuumi in order to counter Jinx during both the laning and mid / late game phases of League of Legends, you should continue reading to pick up a few extra lessons on this matchup. If you pay attention to the build and tips shown above, you should increase your win rate by a lot and be closer to League of Legends pro players.
Yuumi usually racks up a lot less CS relative to Jinx. Champs who on average don't earn many minion kills often don't need much CS to be valuable teammates, such as sup champs. These kinds of champions are able to scale properly off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, usually require several high cost items to be effective. In either case, try to do better than the numbers shown here to do well.
The top items to prioritize in your Yuumi versus Jinx build include Shurelya's Battlesong, Mikael's Blessing, and Ardent Censer. When Yuumi bought at least these three items in her build, she performed significantly better vs Jinx than with most other common item sets. In fact, Yuumi boasted an average win rate of 42.5% when playing against Jinx with this counter build.
To have the best chance of vanquishing Jinx as Yuumi, you should equip the Summon Aery, Manaflow Band, Transcendence, Scorch, Font of Life, and Revitalize runes from the Sorcery and Resolve rune sets. Out of all the runes players picked for Yuumi vs Jinx battles, this composite of runes yielded the best win rate. Moreover, these runes provided a 42.5% win rate overall.
By default, tips, statistics, and builds on how to beat Jinx as Yuumi are displayed for all ranked divisions. To narrow the statistics and builds to a distinct skill level, you should use the selection menu at the top of this page.