The cropped top is a pretty option for hot weather. Wear it alone or layered under a jacket and complement the cropped silhouette with high-rise styles - a pencil skirt or wide-leg pants.
If you're budget-restricted, your best bet is this Missguided Cropped Top. It's a fantastic piece, while not very costly. Another strong contender for your wardrobe is this J.o.a. Cropped Top. While the price of this item is not very high, it will surely attract a lot of attention.