- Janna was designed by Brackhar.
- Janna is voiced by Sona. , who also voices
- Her title was previously "The Avatar of Air". In some languages, she still retains this title, such as French ("L'avatar De L'air").
- Janna's background story is possibly inspired from the character from the franchise. Storm was a street child who lived off her wits and thievery, until discovering her own powers, which led to her being revered by her fellow citizens.
- Janna is the only champion that can shield turrets.
- Janna's dance is a reference to Dance Studio's choreography to Jazz-Funk. A side-by-side comparison can be seen here.
- Forecast Janna references the dance from "I'm Singing in the Rain". A side-by-side comparison can be seen here.
- Janna was the first champion to receive a visual rework.
- Ezreal (person) confirmed that Janna's last name is Windforce.
- As of Patch V220.127.116.11, Janna gained a new voice actor and lines.
- Janna's old voiceovers was made to sound like the wind was blowing while she spoke. A video containing her old quotes before this change can be found here.
- Janna received a new joke after her patch update. She begins to say one of her old quotes in her old voice, before coughing and apologizing in her new voice, saying she doesn't know what came over her.
- Janna's second joke "Yes, it's true. For only $2.95 a minute, I will leave you breathless." is a reference to many television commercials for adult phone hotlines.
- Janna is one of the few champions that have had their voiceovers changed. Others are Anivia, Katarina and Karma.
- Janna's old quote, "I float on wings of truth", is similar to Vayne's quote, "On wings of night", and Shyvana's quote, "On wings of fury".
- Janna is one of the first champions to have her in-game model redone based off the Chinese Splash Art.
- Classic Janna, both Chinese and American, shows marks on her shoulders. However, they are not seen on her in-game model.
- Tempest Janna may be a reference to the character from the franchise.
- Frost Queen Janna is possibly a reference to , a summoned being from the series, particularly her appearance.
- Victorious Janna is possibly a reference to , a from and a childhood friend of and .
- On the Forecast Janna splash art Teemo can be seen floating on the right, and on the left down corner of the art there is what seems to be a Turret.
- The Romanian voice over of Forecast Janna includes a reference to the most known Romanian newscaster.
- On the updated Splash art for Forecast Janna she has a necklace with the RGN News tag on her neck.
- Janna is said to have tutored Karma in utilizing of her fans for battle.
- Janna was once matched through Blitzcrank's dating service with the journalist Bob Nashahago. It is unknown if they intended to date one another, considering Nashahago had been dating Nidalee at the time.
- In the Lore, Janna originally lived in the city-state of Zaun.
- Pictures of Janna wearing lingerie were made public, much to her dismay. It is unknown if these pictures were taken professionally or without her permission, although it has been suggested that this was the work of an ex-boyfriend.
- Janna has piloted the zeppelin, "Tailwind", and won a race during the annual Techmaturgical Conference as the representative of Piltover, defeating the Zaunite competitors aboard their flagship "Lead Zeppelin."
Forecast Janna legendary skin login animation:
- ↑ Ezreal confirms her last name
- ↑ The Journal of Justice: Volume 1, Issue 17#Blitzcrank.E2.80.99s Fleshling Compatibility Services
- ↑ The Journal of Justice: Volume 1, Issue 05#The Storm.27s Bedroom
- ↑ The Journal of Justice: Volume 1, Issue 12#Whoops.21 Here.27s Janna.21
- ↑ The Journal of Justice: Volume 1, Issue 24#Piltover Wins Annual Zeppelin Race