May weather forecast
Rayong, Thailand

May kick-starts the monsoon period in Rayong, exhibited by an onset of heavier rainfall. During this time, visitors generally anticipate a surge in humidity. This month holds the record for the highest average rainfall for the year, with a massive jump from previous measurements to 199mm (7.83"). Despite prevalent rains, the temperature remains consistently warm and sea conditions favorably decent.

Temperature

The onset of May in Rayong, Thailand, manifests an average high-temperature of a still hot 33.6°C (92.5°F), demonstrating a minor variation from the preceding month. Rayong's average low-temperature in the month of May is recorded at a moderately hot 26.9°C (80.4°F).

Heat index

The heat index for May is estimated at a life-threatening hot 50°C (122°F). Be on the lookout: Heat cramps and heat exhaustion are anticipated. Continued exertion can result in heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In Rayong, Thailand, the average relative humidity in May is 79%.

Rainfall

In Rayong, in May, during 15 rainfall days, 199mm (7.83") of precipitation is typically accumulated. In Rayong, Thailand, during the entire year, the rain falls for 111 days and collects up to 1383mm (54.45") of precipitation.

Sea temperature

May is the month with the warmest seawater in Rayong, Thailand, with an average sea temperature of 30.1°C (86.2°F).
Note: Swimming or participating in water activities at temperatures above 30°C (86°F) might not be as invigorating as one might hope.

Daylight

In May, the average length of the day in Rayong is 12h and 43min.
On the first day of May, sunrise is at 05:54 and sunset at 18:30. On the last day of the month, sunrise is at 05:48 and sunset at 18:37 +07.