Reference data analysis
What the year comparison shows for Lake Ägeri
Typical low point
723.62 m a.s.l.
December 15
Typical high point
723.85 m a.s.l.
June 10
Typical range
24 cm
Difference between daily medians
In the 1991-2020 reference period, Lake Ägeri's seasonal median is lowest on December 15 at 723.62 m a.s.l. and highest on June 10 at 723.85 m a.s.l.. The difference between these typical points is 24 cm. This describes the average seasonal cycle, not the largest individual fluctuation.
The 2026 curve currently contains 265 calendar days. On September 22 it shows 723.29 m a.s.l., which is 49 cm below that calendar day's median of 723.78 m a.s.l.. Compared with the same calendar day in 2025, the value is 49 cm lower.
Within the 1991-2020 reference period, the envelope reaches its highest value of 725.13 m a.s.l. on August 23 and its lowest value of 723.22 m a.s.l. on November 20. These are extremes of the displayed reference period, not all-time records.
The analysis uses the water-level series from Ägerisee, Unterägeri. Matching calendar days are compared, and the median is the middle value of the reference years. This classification does not replace flood warnings or local safety information.