Job satisfaction is considered one of the most important job attitudes, being a good predictor of important individual and organizational outcomes. Its antecedents and results have been well researched, both in the area of work context and of individual characteristics. However, less efforts have been invested into research in the domain of environmental influences on job satisfaction. Job satisfaction has been shown to fluctuate throughout the day as an effect of specific job-related events (Ilies & Judge, 2002). In the context of average but significant correlations between job satisfaction and satisfaction in other areas of life (including life satisfaction), fluctuations of job satisfaction are possible also as an effect of larger environmental factors, such as seasonality and other factors. The current research investigates across a 6-months period with weekly measurements the fluctuations of job satisfaction in a sample of 183 job incumbents. Various subjective (e.g. perception of pollution in city) and objective (e.g. average daily temperature) environmental measurements have been collected and investigated as covariates of the observed fluctuations.