A total 667 goats and 669 sheep faecal samples were randomly collected in every season during the period of October 2017 to September 2018 at Department of Veterinary Parasitology to ascertain the influence of weather parameters on population dynamics of gastrointestinal parasites in different geographical regions of Maharashtra. The highest Egg per Gram [EPG] was recorded during monsoon [7320±338.23] in sheep and [6060±17.35] in goats during the monsoon season and lowest in summer season [440±120.83] and [600±277.48] respectively in sheep and goat. The severity of GI parasitism in goats and sheep were measured in terms of Egg per Gram [EPG] which showed significant seasonal correlation in all three seasons with rainfall, temperature and relative humidity. Ova of Strongyle spp, Strongyloides spp. Trichuris spp, Paramphistomum spp. sp. and oocyst of Eimeria spp, were found in [50.52%, 29.29%, 11.50%, 2.54%, 20.62%] and [59.22%, 24.28%, 24.28%, 6.44%, 34.18%] in sheep and goats respectively. The other GI parasitic ova/ oocyst in descending order were of Strongyle 50.52 percent, Eimeria 20.62 percent, Trichuris 11.50 percent in sheep and same pattern Strongyle 59.22 percent, Eimeria 34.18 percent, Trichuris 24.28 percent in goats.

Not only seasonal prevalence of GI parasitism in sheep and goats varies significantly during three seasons but also the severity of infection recorded in terms of EPG also shows at par trend of seasonal parameters. The variation in weather parameter also recorded and it was noted that highest rainfall, temperature and humidity were 3028 mm, 39 ⁰C and 94.37 percent during the study period. Correlation of parasitic load data with meteorological parameters and drawing of prediction models for every year is essential for control the parasitic infection.