Is the humidity high if it is 86?

Very high.

Dehumidification is required when the indoor humidity reaches 80 degrees. According to my country's indoor air standards, indoor humidity should be 40% to 80% in summer and 30% to 60% in winter. The suitable indoor humidity for the elderly and children is 45% to 50%, and the suitable indoor humidity for patients with respiratory diseases such as asthma is between 40% and 50%.

In summer, the humidity in most areas of our country is relatively high. You can place a hygrometer indoors to observe the humidity status at any time. The air humidity in the south is high, so you can turn on the dehumidification function of the air conditioner. On rainy days, the outdoor humidity is heavy, so you should reduce the window opening time. When the weather is fine, open more windows for ventilation and moisture dissipation. Put some moisture-absorbing boxes or desiccants in wardrobes and cupboards. Keep less moisture in the bedroom. Raise fish and various plants.

An environment with excessive humidity is also not good for human health. People may feel nausea, loss of appetite, irritability, fatigue, dizziness, etc. Over time, they may also develop rheumatoid arthritis. In a high-humidity environment, mold and other bacteria are more likely to breed, threatening human health.