The installation, which took place from midday to 5pm, featured a collection of stunning dance performances of many different styles and genres, as well as opportunities for the audience to get up and boogie themselves.
Despite the rain, Big Dance Bus stayed true to its promise to "unite through dance", and got hundreds of locals to their feet to join in with dances both traditional and modern.
Emma Abbey, a producer for Big Dance Bus, said: "Big Dance Bus is a pop-up ballroom and ready-made rave; we pop up in all sorts of places across London and the UK.
"We pop up in fields, high streets, markets, we've done swimming pools, we've shut Regent Street, we've been in Covent Garden.
"The real essence of Big Dance Bus is that it showcases dance across genres, across abilities. We're inclusive, we're open, we're welcoming."
The Bell Square performance was the last stop ever for the Big Dance Bus after having gone on for 10 years. The Hounslow stop was the 28th in a UK-wide tour this year.
At the Big Dance Bus event, Ms Abbey said: "Today we have Indian dance... Bharathanatyam, Bollywood, and Bhangra... We've also got contemporary dance, we've got street dance, line-dancing, cheerleading, African dance, a piece where there are mummies dancing with their babies, we've got a local soloist who is eight years old.
"And then we've got workshops throughout the day, so we've got a Zumba workshop, we've got wheelchair streetdance, and we've got a classical Indian workshop."
The Big Dance Bus has visited Bell Square in Hounslow twice, and Hounslow itself six times, including a stop in Feltham Shopping Centre. The company use mostly local dancers in their touring performances, as well as a few resident dancers who travel with the bus.
Ms Abbey said: "Pretty much all of the dancers are local to Hounslow; then we've also got people who've travelled from other areas of London to come here, which I think is really important as well. We're getting people to come to areas where they might have never come to before.
"What dance does is that it is language-less, there are no barriers, you could be of any culture, any origin, any ethnicity and you can understand it, you can communicate with it."
Coming up next at Hounslow Bell Square will be Roger Bernat: The Rite of Spring on Saturday September 24 (7.30pm and 9pm).
The Rite of Spring is one of the world's greatest ballets. A musical piece written in 1913 by Russian composer Igor Stravinsky, it was made famous by German dancer and choreographer Pina Bausch in 1975.
The show is a silent-disco version of The Rite of Spring, and like all Hounslow Bell Square performances, will be free to take part in.
Councillor Steve Curran, leader of Hounslow Council, said: "There is literally something for everyone to go and see and be entertained in Bell Square this summer. You can get to see live entertainment for free and on your door step."
Bell Square, High Street, Hounslow, TW3 3HH - 020 8232 1019