Residents have been warned to be alert in central and western areas due to poor visibility and fog formation over the next two days.
Visibility was reduced to less than 1,000 metres over some internal western areas on Monday, according to the National Centre for Meteorology and Seismology.
Cloudy and hazy conditions could increase in eastern areas of the country with moderate winds through the afternoon.
Humidity will increase in coastal and internal areas at night and in the morning with the sea turning rough in the Arabian Gulf.
Temperatures will range from 22°C to 40°C in the interior regions, 23°C to 38°C along the coast, 20°C to 30°C in the mountains.
The maximum humidity will be 75 to 90 per cent across coastal regions, between 70 to 95 per cent in internal areas and 30 to 50 per cent in the mountains.
