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Has the climate in Asahikawa changed?

Asahikawa has warmed about 2.4°F between 1971 and 2020.

About 0.5°F per decade, measured from Asahikawa's official daily weather records, 1971–2020. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Asahikawa's warming is broadly in line with other cities in Japan — neither unusually fast nor unusually slow.

What has actually changed

Each card compares the 1970s (the first ten years of the record) with recent years (the last ten) — the same span the headline and the chart use.

Freezing nights
76 fewer nights
1970s
164 / yr
Recent
88 / yr
Milder winters — fewer frosts
Average temperature
+1.9°F
1970s
43.5°F
Recent
45.4°F
A steady upward drift
Hot days above 90°F
1 fewer day
1970s
4 / yr
Recent
3 / yr
Slightly fewer hot days
Rainy days
8 more days
1970s
183 / yr
Recent
191 / yr
Wetter on average

Asahikawa's temperature, year by year

Average temperature for each year from 1971 to 2020.

41°43°45°47°1971: 43.6°F1972: 44.9°F1973: 44.2°F1974: 43.0°F1975: 43.5°F1976: 43.2°F1977: 42.6°F1978: 43.5°F1979: 44.0°F1980: 43.0°F1981: 42.7°F1982: 44.7°F1983: 43.2°F1984: 43.2°F1985: 43.7°F1986: 42.5°F1987: 43.7°F1988: 43.8°F1989: 45.9°F1990: 47.0°F1991: 45.5°F1992: 44.3°F1993: 44.4°F1994: 45.6°F1995: 45.4°F1996: 43.7°F1997: 45.1°F1998: 44.5°F1999: 45.5°F2000: 44.3°F2001: 43.4°F2002: 44.9°F2003: 44.4°F2004: 45.6°F2006: 45.0°F2007: 45.2°F2008: 45.2°F2009: 45.0°F2010: 46.2°F2011: 45.0°F2012: 45.0°F2013: 45.1°F2014: 45.0°F2015: 46.3°F2016: 45.0°F2017: 44.9°F2018: 45.6°F2019: 45.9°F2020: 46.2°Flong-term trend197119801990200020102020
a warmer-than-average year a cooler-than-average year

Each bar is one year. Most recent years sit above the older ones. Some recent years still came in cool — warming is a slope, not a straight climb.

In day-to-day terms, that long-term shift shows up as about 48 fewer freezing nights a year compared with the 1970s.

Methodology & sources

Temperature — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Asahikawa, about 2 km from the city centre.

How we build these numbers →