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Has the climate in Asaka changed?
Asaka has warmed about 2°F between 1991 and 2024.
About 0.6°F per decade, measured from Asaka's official daily weather records, 1991–2024. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.
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.
Asaka's temperature, year by year
Average temperature for each year from 1991 to 2024.
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.
Methodology & sources
Temperature — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Nerima, about 7 km from the city centre.