Information on
1903 / 12: Observer: Georg Striedinger (until 1928 / 12).
1905/10: The observation 'snow cover' with the symbol [∗] is entered in the Notes column for the first time.
from 1910/12: The "height of the thermometer above the ground" is specified as 2.75 m (previously 3.01 m).
- From January 2 to January 20, 1901, the daily average was below -5 °C and the minimum temperature was below -10 °C for 19 consecutive days.
- 16 days with measurable snowfall, 12 of them in a row, were recorded in February 1902.
- From January 18 to January 24, 1903, the daily average temperature was below -14 °C, and the daily minimum was below -20 °C on 6 of these days.
- On January 24, 1903, the lowest temperature measured in Graz was recorded at -23.7 °C (together with February 3, 1929).
- On January 22, 1907, a daily minimum of -22.0 °C and a daily average of -18.4 °C were recorded.