![]() Temperature is a measure of the thermal state of matter and represents the degree of hotness or coldness of a body. Hence, the total solar radiation potential will be a key factor for designing and predicting the performance of solar energy equipment. ![]() Even for the design of a solar energy conversion system, it requires precise knowledge of the availability of global solar radiation at the location of interest. Solar radiation is one of the important parameters to study climate change, environmental pollution, crop production, food industry, and hydrology. It is influenced by the location latitude, elevation, and proximity to water bodies. More importantly, climatic change has a great influence on the lives of people and their environments. Monitoring and prediction of the climatic phenomenon have developed over the years as a result, wide knowledge and information have been gathered that have helped to understand and to predict it. The diurnal and nocturnal temperature of each month showed that temperature difference was relatively lower (less than 10☌) at summer rather than in winter. Dew point was also calculated from the actual readings of air temperature and relative humidity using the online calculator, and the calculated value showed the exact linear relationship with the observed value. The lowest value of the relative humidity (55.4%) in April indicates the driest month of the year. ![]() Air temperature and dew point had the highest value from June to September nearly at 29☌ and 25☌, respectively. Maximum solar radiation (331 Wm -2) was observed in May and minimum (170 Wm -2) in December. Monthly variation of solar radiation, air temperature, and dew point shows a similar pattern, lower at winter and higher in summer. The dew point temperature shows somewhat complex behavior. However, the change in air temperature satisfies the sine function. The result shows that on a clear day, the variation of solar radiation and RH follows the Gaussian function in which the first one has an upward trend and the second one has a downward trend. ![]() This paper is aimed at reporting the variation of daily and monthly solar radiation, air temperature, relative humidity (RH), and dew point over the year of 2013 based on the data obtained from the weather station situated in Damak, Nepal. Monitoring and prediction of the climatic phenomenon are of keen interest in recent years because it has great influence in the lives of people and their environments. ![]()
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