I live in the desert southwest in the USA. Specifically in Albuquerque, New Mexico. Winters are mild with typical winter high in the 40-50 F range. Almost always sunny. Summertime highs around 95 F with occasional temperature over 100 F.

Summer is no issue as I get out at sunup. I can do a 4-hour ride before it gets uncomfortably warm (above 80 F). It's also extremely dry where I live. So, if you're sweating and moving you keep cool.

Winter is the opposite. I ride in the afternoon during the warmest party of the day. Though sometimes that may still be temps in the 30-40 F range.

While I don't like the colder months, I'll take a ride in the cold over an indoor trainer ride. I managed to NOT do a single indoor ride this past winter.