How does the cold affect blood pressure?

Hint: Over a two-year period, researchers examined seasonal variation in blood pressure among 8,801 adults over the age of 65 in France. Both systolic and diastolic blood pressures varied with the weather, according to the findings. Overall, systolic blood pressure was 5 points higher in the winter than in the summer.

Complete answer:
In general, blood pressure is higher in the winter and lower in the summer. Because low temperatures cause your blood vessels to constrict, blood pressure rises because more pressure is required to force blood through your constricted veins and arteries.

Blood pressure can be affected by a sudden change in weather patterns, such as a weather front or a storm, in addition to cold weather. Your body — and blood vessels — may react similarly to cold to sudden changes in humidity, atmospheric pressure, cloud cover, or wind. These weather-related blood pressure variations are more common in people 65 and older.

Other seasonal causes of high blood pressure include weight gain and reduced physical activity, both of which are common in the winter. If you already have high blood pressure, continue to monitor your readings as the seasons change and consult your doctor.

Note: Blood pressure readings of less than 120/80 mm Hg are considered normal. If your results fall into this category, stick to heart-healthy habits like eating a well-balanced diet and exercising regularly.