In many practical disciplines, time series analysis, and forecasting—a technique that predicts future values by analyzing past values—play a substantial role. In this paper, the researchers analyze the monthly mean temperature in Davao Oriental from 2010 to 2022 using the SARIMA (Seasonal Auto-Regressive Integrated Moving Average) technique. Data from January 2010 to May 2020 were used as the training data set, while data from June 2020 to December 2022 were used as the testing data set. The presentation includes a thorough overview of model selection and forecasting precision. The findings demonstrate that the suggested research strategy achieves good forecasting accuracy. The analysis reveals that the best model which was satisfactory to describe was SARIMA (0,1,3) (2,0,0) [12], and in the month of May 2023, the temperature will be 28.28 0 C. In subsequent work, the researchers hope to expand the number of possible grid search parameter combinations. This method may lead us to models with improved predictive ability. The length of the training set may also affect forecasting accuracy, in addition to the SARIMA model’s parameters. A follow-up study is needed to investigate both hypotheses.