Purpose: This study aims to explore how science, technology, engineering, mathematics and medicine (STEMM) graduate students' experiences with and conceptualizations of racism can more clearly expose the current racial climate across multiple academic institutions. Design/methodology/approach: A mixed-method approach using a single online questionnaire consisting of open-ended and Likert scale questions about their perceptions of the racial climate in their department was completed by 34 graduate students of different races and STEMM disciplines. Findings: Results from this study suggested that graduate students, regardless of race, consistently perceive STEMM as colorblind. The results also suggest that experiencing or witnessing racial discrimination is potentially predictive of perceptions of negative social support. Furthermore, multiracial and international graduate students often face different experiences of discrimination than do other graduate students. Originality/value: By better understanding STEMM academic climates, higher education institutions can begin to reflect on the social barriers that may limit minoritized students from matriculating in academic STEMM spaces and affect retention.