September had the most 2025 incidents, with 7
MONTH: September had the highest number of incidents (7).
NCIER®
Timing by month, day and time of day
40 claims on pp. 7–57 (fact 37, statement 3).
Claims about Timing by month, day and time of day
Incidents occurred on all seven days of the week, most on Wednesdays (10)
DAY: Active shooter incidents occurred every day of the week with the most occurring on Wednesdays (10).
September had the most 2025 incidents (7); October had none
September saw the highest number of incidents (7) while October experienced no attacks.
April incidents rose from one in 2024 to five in 2025, the largest monthly increase
Compared to 2024, April had the most notable increase, with incidents rising from one in 2024 to five in 2025.
June incidents fell from five in 2024 to two in 2025, the largest monthly decrease
Conversely, June experienced the largest decrease, as the number of incidents fell from five in 2024 to just two in 2025.
Wednesday had the most incidents (10) and Thursday the fewest (one)
Wednesday had the highest number of incidents (10) compared to Thursday, which had one.
Wednesday (five to 10) and Saturday (two to seven) had the largest weekday increases
Compared to 2024, both Wednesday and Saturday saw the largest increases, with Wednesday incidents doubling from five to 10, and Saturday’s rising from two to seven.
Thursday had the largest weekday decrease, from six in 2024 to one in 2025
Thursday experienced the largest decrease, with incidents falling from six in 2024 to just one in 2025.
January, February and March each had two incidents in 2025
January | 2 February | 2 March | 2
23 incidents (68%) in 2025 occurred between 6:00 a.m. and 5:59 p.m.; 63% in 2024
Overall, the majority of shootings occurred between 6:00 a.m. and 5:59 p.m., accounting for 23 incidents or 68% of the 2025 total. In 2024, a similar trend was observed, with 15 of the 24 incidents or 63% occurring within the same time frame.
Sunday had 5, Monday 6 and Tuesday 2 incidents in 2025
Sunday | 5 Monday | 6 Tuesday | 2
Eleven incidents occurred between 6:00 a.m. and 11:59 a.m.
6:00 a.m. to 11:59 a.m. | 11
Seven incidents occurred between 6:00 p.m. and 11:59 p.m.
6:00 p.m. to 11:59 p.m. | 7
June had the most 2021-2025 incidents (29)
MONTH: June had the highest number of incidents (29).
Incidents occurred every day of the week, most on Monday (40)
DAY: Active shooter incidents occurred every day of the week with the most occurring on Monday (40).
Bar chart shows monthly active shooter incidents for each year 2021-2025
This bar chart shows the number of active shooter incidents that occurred each month from 2021 through 2025, with separate bars for each year.
October-February had fewer attacks than March-September over five years
Based on the five-year data, October through February had less active shooter attacks compared to March through September.
June led with 29 incidents (5.8/yr), then April with 28 (5.6/yr)
June had the most incidents (29) which averaged 5.8 per year, followed by April (28) with an average of 5.6 per year.
October had fewest incidents (8, 1.6/yr); February and December had 10 each
In contrast, October had the fewest incidents (8) which averaged 1.6 per year with both February (10) and December (10), averaging 2.0 per year.
Average incidents per month over 2021-2025 for all 12 months, 1.6 to 5.8
Average number of incidents by month: • January: 2.6 • February: 2.0 • March: 3.2 • April: 5.6 • May: 4.6 • June: 5.8 • July: 4.4 • August: 5.0 • September: 4.0 • October: 1.6 • November: 2.6 • December: 2.0
Chart shows active shooter incidents by weekday for each year 2021-2025
This bar chart shows the number of active shooter incidents that occurred each day of the week from 2021 through 2025, with separate bars for each year.
Monday had most incidents 2021-2025 (40, 8.0/yr); Friday fewest (19, 3.8/yr)
From 2021 to 2025, Monday had the highest number of incidents (40) with an average of 8.0 per year, while Friday had the lowest number of incidents (19) with an average of 3.8 per year.
Bar chart shows incidents by time of day for each year 2021 through 2025
This bar chart shows the number of active shooter incidents that occurred by time of day from 2021 through 2025, with separate bars for each year.
Most attacks (71) occurred noon to 5:59 p.m.; fewest (35) midnight to 5:59 a.m., 2021-2025
Over the five-year period, most attacks (71) occurred between 12:00 p.m. and 5:59 p.m., whereas the fewest number of attacks (35) occurred between 12:00 a.m. and 5:59 a.m. Average
Average of 7.0 incidents per year between midnight and 5:59 a.m.
12:00 a.m. to 5:59 a.m.: 7.0
Average of 11.6 incidents per year between 6:00 a.m. and 11:59 a.m.
6:00 a.m. to 11:59 a.m.: 11.6
Average of 14.2 incidents per year between noon and 5:59 p.m.
12:00 p.m. to 5:59 p.m.: 14.2
Average of 10.6 incidents per year between 6:00 p.m. and 11:59 p.m.
6:00 p.m. to 11:59 p.m.: 10.6
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