The majority of previous research has completed analysis of weather patterns on a synoptic or regional scale with few studies analyzing weather conditions proximal to collection sites. A study that focuses on local weather conditions may lead to better understanding and more accurate forecasting of rain water chemistry. The overall objective of this project is to determine the relationship between local weather patterns and rain water chemistry in Wilmington. Daily and hourly meteorological data were collected consisting of average temperature, relative humidity, wind speed and direction, and maximum and minimum temperatures for the 48 hour period prior to each rain event. These data, along with the nitrate and sulfate concentrations obtained from the MACRL Lab at UNCW, were entered into an Excel spreadsheet. Data analysis of local weather conditions 48 hours prior to 24 storm events, including review of descriptive statistics, graphical and linear regression analysis, t-tests, and synoptic weather map analysis, was completed to determine any relationship between variables. The overall conclusion of the study is that there are no obvious or significant relationships between nitrate and sulfate concentrations and local meteorological variables. However, wind direction frequency and statistical tests suggest that trajectory, whether terrestrial or marine, is the most important factor influencing rain water chemistry. Further, weather map analysis indicated terrestrial storms have higher amounts of nitrate and sulfate while marine storms are characterized by lower concentrations of the chemicals. In conclusion, this study indicates that storm track is the most important factor influencing nitrate and sulfate concentration in the Wilmington area while local weather conditions may not add significant additional information to existing knowledge based upon trajectory analysis.