Passage: Air temperature is stable over the year at 26 °C in February and 27 °C in August. Precipitation is as high as 3,000 mm/year and mostly occurs in summer. Sea currents are south-easterly and easterly in winter and south-westerly and westerly in summer. The average surface water temperature is 26-28 °C in February and 29 °C in May. The water temperature is constant at 4.8 °C at the depths of 1,600 m and below. Salinity is 31.5-32.5‰  in summer and 30.0-33.0‰ in winter in the southern part. In the northern part, it decreases to 20-25‰ due to the inflow of fresh water from the Irrawaddy River. Tides are semidiurnal  with an amplitude of up to 7.2 meters.
At it's lowest average surface temperature in February, how many degrees C warmer is it in May? At it's maximum level in the summer and winter, how many more percent is the salinity level in the northern part of the country in the summer? How many degree Celsius increase between February and August  regarding air temperature? How many degrees Celsius on average, does the surface eater temperature range in February? How many degrees higher is the temperature in February compared to August? How many percentage points differentiate the salinity in water from the lowest in summer to the highest in winter? On average, how many degrees C warmer is the temperature in August compared to February?