I found that in order to get consistent exercise, I had to be able to work out regardless of the weather. So, I joined a gym. The YMCA often has inexpensive memberships, and if needed you can sometimes get trial memberships or short-term memberships--say, for the summer.
Where I live now, the YMCA isn't convenient, so I joined a different gym. It pays to shop around, check out the facilities, make sure they have what you need. Try to pay month-by-month rather than a year ahead--gyms have been known to go out of business!
This way, the weather is not a consideration in whether I get my exercise in. I live in Florida, and it's not just hot--we get terrific rain storms on almost a daily basis in the summer.
"My religion is kindness." --His Holiness the Dalai Lama