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Normal statistics for tropical cyclones with maximum wind speeds of 17.2 m/s or higher forming over the western North Pacific

*Normal statistics are 1981-2010 averages.
**Blanks in the tables indicate an absence of tropical cyclones for the month in question during the period 1981-2010.
***The annual number of tropical cyclones approaching Japan does not always match the sum of monthly numbers because some approaches span two consecutive months.

Table 1 Numbers of tropical cyclones with maximum wind speeds of 17.2 m/s or higher forming over the western North Pacific, those approaching Japan, and those making landfall in Japan
Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
Formation 0.3 0.1 0.3 0.6 1.1 1.7 3.6 5.9 4.8 3.6 2.3 1.2 25.6
Approach 0.2 0.6 0.8 2.1 3.4 2.9 1.5 0.6 0.1 11.4
Landfall 0.0 0.2 0.5 0.9 0.8 0.2 0.0 2.7

Table 2 Numbers of tropical cyclones with maximum wind speeds of 17.2 m/s or higher approaching the mainland of Japan and Okinawa/Amami
Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
Mainland of Japan 0.0 0.1 0.4 1.0 1.7 1.7 0.7 0.0 5.5
Okinawa/Amami 0.0 0.4 0.6 1.5 2.3 1.7 1.0 0.3 0.1 7.6

Table 3 Numbers of tropical cyclones with maximum wind speeds of 17.2 m/s or higher approaching each district of Japan
Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
Okinawa 0.0 0.4 0.6 1.4 2.2 1.7 0.9 0.3 0.1 7.4
Kyushu (South) and Amami Amami 0.0 0.1 0.3 0.8 1.0 1.1 0.6 0.0 3.8
Kyushu (South) 0.0 0.0 0.4 0.7 0.9 1.0 0.4 0.0 3.3
Kyushu (North) 0.0 0.0 0.3 0.8 1.0 1.0 0.3 3.2
Shikoku 0.0 0.3 0.6 1.0 0.9 0.3 0.0 3.1
Chugoku 0.0 0.3 0.5 0.8 0.9 0.2 0.0 2.6
Kinki 0.0 0.3 0.5 1.0 1.0 0.5 0.0 3.2
Tokai 0.0 0.2 0.5 1.0 1.0 0.5 0.0 3.3
Hokuriku 0.2 0.4 0.9 0.8 0.2 0.0 2.5
Kanto/Koshin Kanto and Koshin 0.0 0.2 0.4 0.9 1.1 0.6 0.0 3.1
Izu Islands and Ogasawara Islands 0.1 0.4 0.3 0.8 1.2 1.3 1.1 0.3 0.1 5.4
Tohoku 0.0 0.1 0.3 0.8 0.9 0.4 2.6
Hokkaido 0.1 0.2 0.7 0.7 0.1 1.8