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Rumoi is located in the south of Rumoi Subprefecture, on the coast of the Sea of Japan. Rumoi River flows through the city.
Climate
Rumoi has a humid continental climate (Köppen climate classificationDfb) with warm summers and cold winters. Precipitation is significant throughout the year, but is heaviest from August to December. The highest temperature recorded was 35.6 °C (96 °F) on August 1, 2021.[5]
Climate data for Rumoi (1991−2020 normals, extremes 1943−present)
Source 2: NOAA (Percent possible sunshine, 1961–1990)[8]
Average wind speed by month
(Annual average: 4.9 m/s or 18 km/h or 11 mph)
Month
m/s
km/h
mph
January
6.1
22
14
February
5.3
19
12
March
4.9
18
11
April
4.8
17
11
May
4.2
15
9
June
3.5
13
8
July
3.4
12
8
August
3.8
14
9
September
4.5
16
10
October
5.8
21
13
November
6.5
23
15
December
6.5
23
15
Transportation
Rail
Currently, there are no rail services in the city of Rumoi.
Prior to 1 April 2023, Rumoi station, located in the city centre, was the terminus of the JR HokkaidoRumoi Main Line, which linked the city to Fukagawa. The sections between Rumoi and Ishikari-Numata, including Tōgeshita, Horonuka, Fujiyama, Ōwada and Rumoi station, were closed on 31 March 2023 due to declining passenger numbers. The Rumoi Main Line also formerly ran to Mashike, located southwest of Rumoi, until 4 December 2016, when the Mashike-Rumoi section, including Segoshi and Reuke station, was closed owing to declining passenger numbers.