When is the best time to rent the Toyota Veloz in Umm Al Quwain? Refreshed regularly to keep average fleet age low,. From compact city cars to full-size SUVs in Umm Al Quwain, the honest answer is any time of year. Winter brings right driving weather for exploring Umm Al Quwain at leisure. Summer demands a well-maintained air conditioning system — which every automobile in our automobile selection is confirmed to deliver.