That’s a question best asked of your health care provider, as individuals vary.
That said, though, heat has been researched as a THERAPY for diabetes. Just the process of eating anything raises both your insulin level and body temperature. The increased amount of circulating insulin drives the storage of nutrients and is the primary signal that tells your body to store energy from your food as body fat and glycogen. Insulin is also the main signal that drives glucose out of your blood and into your fat and muscle cells.
When insulin is elevated you are actively storing fat and unable to release that from your stores. However, recent research shows a correlation between temperature and insulin. A connection between ambient temperature and increased insulin resistance has been found in studies on people who spend more time outside or without air conditioning and thus more prone to be affected by seasonal changes in ambient temperature.
Temperature can even influence your glucose metabolism over a very short period of time. Heat can also increase the absorption of injected insulin, causing lower blood sugar levels and quick falls in blood sugar than at normal temperatures.
For all the interesting details, see: The Book on Heat.
