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Has the climate in Castelo Branco changed?
Castelo Branco has warmed about 1.6°F between 1997 and 2021.
About 0.6°F per decade, measured from Castelo Branco's official daily weather records, 1997–2021. 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.
Castelo Branco's temperature, year by year
Average temperature for each year from 1997 to 2021.
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 — 1991–2020 normals computed from 25 years of daily observations at Castelo Branco, a weather station, about 1 km from the city centre. The underlying daily records come from NOAA's global station network.