Lucy, 39, looked stunning as she donned a clingy white tips with a hole design over the neck, chest stomach and in a racy design.
Pairing it with a skintight grey skirt, Lucy showed off her famous figure as she predicted warm weather ahead for the middle of September.
The skimpy material of the white top showed off Lucy's hourglass proportions, sending her viewers wild as she joked that they "shouldn't put their shorts away yet".
Letting her dark hair cascade over her shoulders, Lucy showed off her natural beauty as she kept her make-up simple but elegant.
Uploading a picture of her latest weather forecast onto social media, it didn't take long for the weather girl to be inundated with compliments.
Lucy captioned the picture: "Feeling like mid summer in mid September - don't put away your shorts just yet.
"See you with this week's toasty-looking forecast after the @itvnews at 10."
One fan replied: "Looking fabulous Lucy are you wearing shorts here?"
Another added: "Stunning looking women!! My 2nd favourite weather forecaster ..behind Anne-Marie Foss..who remembers her?"
A third chipped in: "Thanks Lucy it's been rather warm today. And you are looking lovely."
A fourth wrote: "Lucy you are so beautiful it’s unbelievable."
A fifth gushed: "Weather after the News at 10pm.....come soon enough!!!"
Lucy is no stranger to dressing in glamorous outfits both on ITV and off-screen, wowing her fans with her social media displays.
One of her latest snaps showed her presenting to the camera while stood in a park in a denim skirt and black vest top and white blouse.
Lucy stunned in the sunshine as she shared a snap of herself hard at work, captioning the picture: "Live outside broadcasts on last years August bank holiday - our hottest on record.
"This year I’m thinking of putting the heating on."
GMB continues tomorrow at 6am on ITV.