The maximum air temperature in Altsasu for this day for the last 72 years of observations is +16.8°C, recorded in 2006.
An absolute minimum of -4.3°C was recorded in 2010. The average temperature for this day is +12.2°C.
The heaviest rainfall (24.6 mm) in Altsasu was recorded in 1969. The maximum wind gusts were up to 21.53 m/s in 1992.