Considerable research has pointed towards processing differences as a viable means for understanding the strength and likelihood of a framing effect. In the current study we explored how differences in processing may emerge through diurnal patters in circadian rhythm, which varies across individuals. We predicted that during circadian off-times, participants would exhibit stronger framing effects whereas framing effects would be relatively weaker during on-times. Six-hundred and eighty five individuals took part in the study; the findings supported our hypothesis, revealing a diurnal pattern of risk responding that varies across the 24-hour circadian cycle.