Fatal occupational injuries by day of week and month, 1992–2011
From 1992 to 2011, July had the highest number of fatal occupational injuries (11,168), and the fewest number of injuries occurred in February (8,008). Just over a quarter of workers (28 percent, or 32,795) were fatally injured during the summer months of June, July, and August. In comparison, the winter months of December, January, and February totaled 25,380 fatal injuries (22 percent).
Bureau of Labor Statistics