The research mainly aims to determine the total level of knowledge of citrus farmers about climate change, sources of knowledge and their effects on citrus fruits and the relationship of this level to some independent variables studied, as well as determining the contribution ratios of some independent variables with a significant relationship in explaining the total variation of citrus farmers' knowledge of climate changes, sources of knowledge and effects, in addition to identifying the most important information needed by a farmer citrus fruits to reduce the impact of climate change, and their most preferred sources of obtaining that information. To achieve the objectives of this research, data were collected from a random sample of 308 farmers using a questionnaire form in the personal interview that was initially pre-tested during July 2023. To analyze the research data statistically, simple correlation coefficient, stepwise regression analysis, percentages, arithmetic mean, range and standard deviation were used.The most important results were summarized as follows:There is a relative decline in farmers' knowledge of the effects of various climate changes that have occurred and been witnessed.There is a diversity and multiplicity of extension sources from which the surveyed farmers derive their knowledge about climate changes affecting citrus production. They rely heavily on local sources when compared to government guidance sources.There is a multiplicity of effects on citrus fruits amounting to fifty-five effects resulting from physiological, fungal and insect diseases, in addition to the multiplicity of the form of effect, most of which was negative