Chandigarh, Dec. 23 -- Following a period of low visibility and persistent haze, the city experienced a significant rise in daytime temperatures on Monday as clear skies allowed for better sunlight penetration. According to data from the India Meteorological Department (IMD), the maximum temperature rose by three notches, marking the highest daytime temperature recorded in the city since mid-December. The maximum temperature reached 24.5degC on Monday, up from 21degC recorded on Sunday. This reading is 4.4 degrees above the seasonal normal and represents the warmest day since December 15, when the mercury hit 26.2degC. IMD officials attributed this surge to the absence of a thick fog cover, which allowed sunlight to warm the ground more effectively. Visibility throughout the day remained high, staying above 1,200 metres. However, the respite from winter conditions appears to be temporary. IMD officials have indicated that while pleasant weather is expected to continue into Tuesday, a fresh Western Disturbance is approaching the region around Christmas. This system is likely to trigger a return of dense fog by Wednesday, once again impacting visibility and daytime heating. While the days grew warmer, the nighttime temperature saw a slight decline as the fog cleared. The minimum temperature dropped from 8.8degC on Sunday to 8.3degC on Monday, which remains 1.3 degrees above the normal threshold. Despite the clearer skies, air quality remains a concern for the tricity. According to the daily Air Quality Index (AQI) bulletin released by the Central Pollution Control Board (CPCB), Chandigarh's AQI was recorded at 204, falling into the "poor" category. The air quality in neighbouring Panchkula was even more affected, with an AQI of 254, which also remains in the "poor" bracket....