The weather will be fair to partly cloudy and hazy at times across the UAE and temperatures are likely to decrease, the National Centre of Meteorology said. It will be humid by night and into Monday morning over some coastal and internal areas. The mercury will reach the high thirties in Abu Dhabi and Dubai and humidity should creep above 80 per cent. Light to moderate winds will freshen, causing blowing dust. Conditions will be rough in the Arabian Gulf and slight in Oman Sea.