About 0.1°F per decade, measured from León's official daily weather records, 1971–2025. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.
Is that a lot? León's climate has warmed more slowly than most other cities in Spain.
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
9 fewer nights
1970s
83 / yr
→
Recent
74 / yr
Milder winters — fewer frosts
Average temperature
about the same
1970s
52.3°F
→
Recent
52.4°F
Year-round temperature has barely moved
Hot days above 90°F
5 more days
1970s
7 / yr
→
Recent
12 / yr
More days of serious heat
Rainy days
about the same
1970s
102 / yr
→
Recent
104 / yr
Rainfall pattern about the same
León's temperature, year by year
Average temperature for each year from 1971 to 2025.
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.
When in the year the change shows up
How much warmer each month is now than in the 1970s.
Useful if you garden or care about a particular season —
otherwise the headline above already has the answer.
May has warmed the most — about 1.6°F. The warming runs across the whole year, not just one season.
Methodology & sources
Temperature — 1991–2020 normals computed from 30 years of daily observations at Leon Virgen Del Camino, a weather station, about 7 km from the city centre. The underlying daily records come from NOAA's global station network.