“Hump day” may as well be retitled slump day, as the now-typical spike in fuel prices on Wednesday is proving to be, yet again, another letdown.

Perth motorists are urged to fuel up today, before the price of ULP will be bumped up by 25 cents per litre, reaching a whopping average price of 191.7 cpl.

Coles Express, Ampol, 7-Eleven, EG Ampol and Caltext/Puma will reach 199.9 cpl.