Monthly weather and climate data for Great Aletsch Glacier per hydrological year
The graph below shows the monthly meteorological and climate data for a hydrological year, measured at one of the MeteoSwiss monitoring stations near the Great Aletsch Glacier.
Deviations of the annual values from the climate standard values 1991-2020
Measuring station: Jungfraujoch (3582m), Hydrological year 2025 / 2026
The definitive measured values and deviations for the hydrological year 2025 / 2026 are displayed from 1. October 2026.
| Physical quantity | Annual value | Standard value | Deviation | Unit |
| Temperature | -5.1 | -6.7 | +1.6 | °C |
| Sunshine duration | 207.2 | 1773.3 | -1566.1 | Std. |
| Global radiation | 123.2 | 178.8 | -55.6 | W/m2 |
Source of the basic data: MeteoSwiss
Deviations of the monthly temperature values from the climate norms 1991-2020
Measuring station: Jungfraujoch (3582m), Hydrological year 2025 / 2026
The definitive deviations for this November 2025 will be displayed from 1 December 2025.
| month | Monthly value
°C | Standard value
°C | Deviation
°C | Data
% |
| October 2025 | -5.1 | -4.9 | -0.2 | 97.8 |
| November 2025 | -5.1 | -9.2 | +4.1 | 99.9 |
| Hydrological year | -5.1 | -6.0 | +0.9 | 98.3 |
| Winter half-year | -5.1 | -6.0 | +0.9 | 98.3 |
Source of the basic data: MeteoSwiss
The more the values for «Data» deviate from 100%, the more cautiously the monthly values and deviations should be interpreted.
Deviations of the monthly sunshine duration values from the climate standard values 1991-2020
Measuring station: Jungfraujoch (3582m), Hydrological year 2025 / 2026
The definitive deviations for this November 2025 will be displayed from 1 December 2025.
| month | Monthly value
hrs | Standard value
hrs | Deviation
hrs |
% | Data
% |
| October 2025 | 156.7 | 144.8 | +11.9 | +8.2 | 97.7 |
| November 2025 | 50.5 | 35.4 | +15.2 | +42.8 | 99.9 |
| Hydrological year | 207.2 | 180.2 | +27.0 | +15.0 | 98.3 |
| Winter half-year | 207.2 | 180.2 | +27.0 | +15.0 | 98.3 |
Source of the basic data: MeteoSwiss
The more the values for «Data» deviate from 100%, the more cautiously the monthly values and deviations should be interpreted.
Deviations of the monthly global radidiation values from the climate norms 1991-2020
Measuring station: Jungfraujoch (3582m), Hydrological year 2025 / 2026
The definitive deviations for this November 2025 will be displayed from 1 December 2025.
| month | Monthly value
W/m2
kWh/m2 | Standard value
W/m2
kWh/m2 | Deviation
W/m2
kWh/m2 |
% | Data
% |
| October 2025 | 138.3
102.9 | 128.8
95.8 | +9.5
+7.1 | +7.4 | 97.7 |
| November 2025 | 108.1
25.9 | 78.8
18.9 | +29.3
+7.0 | +37.2 | 99.9 |
| Hydrological year | 130.9
128.8 | 116.6
114.7 | +14.3
+14.1 | +12.3 | 98.3 |
| Winter half-year | 130.9
128.8 | 116.6
114.7 | +14.3
+14.1 | +12.3 | 98.3 |
Source of the basic data: MeteoSwiss
The more the values for «Data» deviate from 100%, the more cautiously the monthly values and deviations should be interpreted.
Measuring station: Distance and compass direction
The measuring station Jungfraujoch (3582m) is located at a distance of approximately 12km from Great Aletsch Glacier in the direction of NNW.
Snow depths
The table below lists the snow depth measuring stations located in the vicinity of the Great Aletsch Glacier. Extensive information on the development of the snow depth for various periods can be called up for each measuring station. All links lead to the website www.whiterisk.ch, which is operated by the Institute for Snow and Avalanche Research SLF.
Legend
- Distance: Approximate distance from the Great Aletsch Glacier to the snow depth measuring station.
- Direction: Seen from the Great Aletsch Glacier, the snow depth measuring station is in this direction.
Availability of data
We have been storing the meteor data since 1. December 2023.
Further information
Further information on the measurement data and the graphics can be found
here... (External link to www.obeng.ch, the website of Oberli Engineering GmbH)
Further links
All links point to pages on our website www.obeng.ch.