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When the seasons shift, most people notice changes in their energy levels, appetite, or even mood. But for someone living with diabetes, these transitions can feel more pronounced. From unexpected blood sugar fluctuations to changes in how the body responds to insulin, weather variations may have a direct impact on day-to-day health.
Whether it’s the onset of summer heat or the chill of winter, temperature swings can influence how active a person feels, how much water they drink, and even how well their medication works. Factors like dehydration, reduced physical activity in colder months, or heat-induced stress can all play a role in altering blood glucose levels.
Since diabetes management depends heavily on consistency, even subtle seasonal changes may bring new challenges. Understanding how the body reacts during these transitions can help people take practical steps to stay in control of their health throughout the year.
Dr Jagadish Hiremath, Public Health Intellectual, tells indianexpress.com, “Temperature fluctuations can significantly influence how the body regulates blood sugar. In hot weather, dehydration is more likely, which can lead to higher blood sugar levels. Heat can also make insulin absorb faster, increasing the risk of low sugar episodes if medication or meals are not adjusted.”
On the other hand, he states that cold temperatures may reduce circulation and make the body more insulin resistant, meaning glucose levels can rise more easily. For someone with diabetes, this means blood sugar monitoring becomes even more important when the weather shifts drastically.
According to Dr Hiremath, staying hydrated is one of the most important steps because adequate fluid intake helps regulate blood sugar and supports kidney function. In hot weather, drinking enough water and avoiding sugary or caffeinated drinks can prevent spikes.
“During colder months, activity levels often reduce, so it becomes necessary to consciously maintain physical movement indoors to keep sugar levels in check. Seasonal eating is also important: including high-fiber vegetables, fruits with a low glycemic index, and warm home-cooked meals during winter can help balance blood glucose. Consistency in meal timings and medication routines is key across all seasons,” he explains.
During seasonal transitions, sudden fluctuations in blood sugar are the biggest concern. Dr Hiremath notes that signs such as excessive thirst, frequent urination, unusual fatigue, dizziness, blurred vision, or sweating may indicate that blood sugar is either too high or too low. In colder weather, he says that people with diabetes must also “pay attention to circulation, especially in their feet,” since numbness or delayed wound healing can worsen in winter.
“Prevention lies in regular monitoring, keeping medication and insulin stored properly at the right temperature, wearing weather-appropriate clothing, and having a clear plan for hydration and diet. Consulting a doctor before making seasonal lifestyle changes ensures that risks are minimised,” concludes the expert.
DISCLAIMER: This article is based on information from the public domain and/or the experts we spoke to. Always consult your health practitioner before starting any routine.
