The experiment was carried out with the aim of investigating the effect of ascorbic acid (AA) administration on fluctuations in rectal temperature (RT) of pigs transported by road during the harmattan season. Sixteen pigs administered orally with AA at the dose of 250 mg/kg served as experimental animals, and 13 others administered orally with sterile water were used as control animals. The RT was measured in all the pigs before and immediately after loading. Meteorological parameters as well as RT were also recorded concurrently at 30 min., 2 and 4 h of the journey, and at 3 h post-transportation and also three consecutive days  post-transportation. The RT value of 38.24±0.16oC recorded immediately after loading in experimental pigs was significantly (p