Tenerife, measured
The questions guidebooks answer with adjectives, answered with counted data. Three that decide a trip — the mountain, the dust and the sea — worked out from open European climate data instead of guessed at.
Ten complete years behind the mountain, 4 behind the sea and only 3 behind the dust — each page prints its own sample size, and shows a warning where that sample is thin. No affiliate links, nothing to sign up for.
-4.5 °C
Median temperature at the top of Teide in January
People arrive in shorts. It is 3,555 m up.
30%
Share of December days over the EU dust limit, south coast
And it is not the month everyone warns you about.
94% vs 60%
March days with waves over 1.5 m: north coast vs south coast
Same island, 40 km apart.
The tools
Teide summit: wind and cold, hour by hour
Will the cable car run, and how cold will it be at the top?
Ten years of hourly reanalysis at 3,555 m. Pick a month and see the chance of gusts above each threshold, hour by hour, plus the temperature you should actually dress for.
Calima: when the Saharan dust actually arrives
Which months bring dust, how bad, and for how long?
Daily PM10 and Saharan dust for four zones of the island. Frequency by month, intensity bands, and how long an episode typically lasts — on a deliberately short record, which the page says out loud.
Sea conditions: which coast, which month
Where is the water calm enough to swim, and how cold is it?
Daily maximum wave height and sea temperature for four beaches on three coasts. The north and the south are not the same island in February.
Why this exists
Search for “calima in Tenerife” or “is the Teide cable car open” and you get the same paragraph rewritten forty times, all of it hedged, none of it counted. The underlying data is public and free — the European reanalysis products that record every hour of weather over the island. Nobody had turned it into the answers people actually search for.
So this site is one thing only: those datasets, aggregated into the specific questions a visitor asks, with the sample size printed next to every figure. Where the sample is thin, it says so in orange at the top of the page rather than in a footnote.
The aggregation script is deliberately small and readable, and the Method page spells out every choice in it — including the one that nearly published three years of dust data labelled as ten.