For last couple of days, Central Pakistan region has been witnessing dense and widespread fog. In the cities of Sargodha, Dera Ismail Khan, and Lahore, fog has been persisting due to which day temperatures are below normal. This is because the fog cover prevents sunlight from reaching the surface thereby allowing cold day conditions to prevail. Cold day conditions are said to exist when the current maximum temperature is 16°C or less and the difference between the normal maximum temperature and the current maximum temperature is 5°C or more.
Cold day conditions currently prevail in several parts of Pakistan with maximums dipping way below normal. The cities of Sialkot, Lahore, Faisalabad, and others have been affected by drop in temperatures. Meanwhile, fog was also witnessed in several parts of the country. The current maximum & minimum temperatures for various cities in Pakistan are as follows:
The diurnal temperature variation, i.e. the difference between the maximums and minimums, for the above mentioned cities currently averages around 4 °C with individual diurnal variation for these locations being:
Sargodha 2.5 °C
Sialkot 3.3 °C
Faislabad 2.2 °C
Dera Ismail Khan 6.5 °C
Lahore 6 °C
Interestingly though, the normal diurnal variation for these cities remain around 15°C during this time of the year. For example, the normal diurnal variation for Sargodha is 14°C while the current diurnal variation for the city is a low lying 2.5°C. Similarly, the normal diurnal variation for Dera Ismail Khan is 16.5°C while the current diurnal variation for the region reads 6.5°C. There is a noticeable amount of difference between the normal & current diurnal variation due to which the weather is extremely cold in all these cities.