Monthly weather and climate data for Gamchi 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 Gamchi 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 | -6.6 | -6.7 | +0.1 | °C |
| Sunshine duration | 1520.4 | 1773.3 | -252.9 | Std. |
| Global radiation | 180.2 | 178.8 | +1.4 | 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 July 2026 will be displayed from 1 August 2026.
| month | Monthly value
°C | Standard value
°C | Deviation
°C | Σ Dev.
°C | Data
% |
| October 2025 | -5.1 | -4.9 | -0.2 | -0.20 | 97.8 |
| November 2025 | -8.8 | -9.2 | +0.4 | +0.10 | 99.8 |
| December 2025 | -8.5 | -11.7 | +3.2 | +1.13 | 99.2 |
| January 2026 | -13.7 | -12.5 | -1.2 | +0.55 | 98.8 |
| February 2026 | -11.3 | -13.3 | +2.0 | +0.84 | 97.7 |
| March 2026 | -11.6 | -11.6 | 0.0 | +0.70 | 99.5 |
| April 2026 | -5.9 | -9.4 | +3.5 | +1.10 | 99.8 |
| May 2026 | -4.3 | -5.2 | +0.9 | +1.08 | 98.9 |
| June 2026 | 0.9 | -1.5 | +2.4 | +1.22 | 99.7 |
| July 2026 | 2.1 | 0.4 | +1.7 | +1.27 | 94.6 |
| Hydrological year | -7.0 | -8.2 | +1.2 | | 98.7 |
| Winter half-year | -9.8 | -10.5 | +0.7 | | 98.8 |
| Summer half-year | -2.2 | -4.4 | +2.2 | | 98.6 |
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 July 2026 will be displayed from 1 August 2026.
| month | Monthly value
hrs | Standard value
hrs | Deviation
hrs |
% | Σ Dev.
hrs | Data
% |
| October 2025 | 156.7 | 144.8 | +11.9 | +8.2 | +11.88 | 97.7 |
| November 2025 | 113.1 | 106.1 | +7.0 | +6.6 | +18.88 | 99.7 |
| December 2025 | 130.0 | 100.8 | +29.2 | +29.0 | +48.10 | 99.4 |
| January 2026 | 125.5 | 117.0 | +8.5 | +7.3 | +56.58 | 98.8 |
| February 2026 | 101.6 | 122.5 | -20.9 | -17.1 | +35.68 | 97.7 |
| March 2026 | 188.0 | 161.4 | +26.6 | +16.5 | +62.30 | 99.5 |
| April 2026 | 243.4 | 159.5 | +83.9 | +52.6 | +146.18 | 99.8 |
| May 2026 | 180.8 | 152.4 | +28.4 | +18.6 | +174.55 | 98.8 |
| June 2026 | 175.9 | 169.7 | +6.2 | +3.6 | +180.72 | 99.7 |
| July 2026 | 105.5 | 110.9 | -5.4 | -4.9 | +175.28 | 94.6 |
| Hydrological year | 1520.4 | 1345.1 | +175.3 | +13.0 | | 98.7 |
| Winter half-year | 814.9 | 752.6 | +62.3 | +8.3 | | 98.8 |
| Summer half-year | 705.5 | 592.5 | +113.0 | +19.1 | | 98.6 |
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 July 2026 will be displayed from 1 August 2026.
| 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 | 85.4
61.5 | 78.8
56.7 | +6.6
+4.8 | +8.4 | 99.7 |
| December 2025 | 68.4
50.9 | 59.6
44.3 | +8.8
+6.6 | +14.8 | 99.4 |
| January 2026 | 83.0
61.8 | 73.7
54.8 | +9.3
+6.9 | +12.6 | 98.8 |
| February 2026 | 105.4
70.8 | 115.1
77.4 | -9.7
-6.5 | -8.4 | 97.7 |
| March 2026 | 197.8
147.2 | 181.2
134.8 | +16.6
+12.4 | +9.2 | 99.5 |
| April 2026 | 275.4
198.3 | 240.2
172.9 | +35.2
+25.3 | +14.7 | 99.8 |
| May 2026 | 289.7
215.5 | 271.9
202.3 | +17.8
+13.2 | +6.6 | 98.8 |
| June 2026 | 292.5
210.6 | 290.4
209.1 | +2.1
+1.5 | +0.7 | 99.7 |
| July 2026 | 266.5
121.5 | 272.7
124.4 | -6.2
-2.8 | -2.3 | 94.6 |
| Hydrological year | 177.1
1241.0 | 167.3
1172.6 | +9.8
+68.4 | +5.8 | 98.7 |
| Winter half-year | 113.3
495.0 | 106.2
463.9 | +7.1
+31.1 | +6.7 | 98.8 |
| Summer half-year | 282.6
746.0 | 268.4
708.7 | +14.1
+37.3 | +5.3 | 98.6 |
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.
Unusual weather, climate and natural events
The following unusual weather, climate and natural events occurred during the hydrological year 2025 / 2026:
| Date | Title, description |
12.11.2025-
14.11.2025 | Zero degree line well above 3000 metres
The zero degree line rises to well above 3000 metres above sea level in Switzerland. |
14.11.2025-
15.11.2025 | Sahara dust (medium intensity)
Sahara dust event with medium intensity. |
| 21.11.2025 | Snow falls down to the lowlands
In the winter of 2025/2026, it snows for the first time in the lowlands. |
16.02.2026-
20.02.2026 | Lawinengefahr Stufe 4 - 5 - 4
Avalanche danger level 4 prevailed across large parts of the Alps.
On 17 February 2026, level 5 (the highest level) prevailed in northern Valais (including Lötschental and Aletsch). Numerous avalanches, some of them very large, were triggered. Various valleys were cut off from the outside world for at least one day (including Lötschental, Goms, Saastal and Binntal). A train derailed near Goppenstein after an avalanche (several people were injured). Around 50 people were evacuated as a precautionary measure in the Lower Valais. |
25.02.2026-
27.02.2026 | Zero degree limit in the 3000 m range
For three days, the zero degree line was around 3000 metres above sea level, which is unusually high for this time of year. |
04.03.2026-
10.03.2026 | Sahara dust (medium intensity)
Sahara dust event with medium intensity. For example, the Bernese Alps were not visible from the Emmental for days on end. |
14.03.2026-
16.03.2026 | A brief spell of winter weather
A brief spell of winter weather has brought snow as far as the lowlands. In the Alps, the avalanche risk has risen to level 4. Roads, for example over the Simplon Pass and into the Saas and Binntals, have had to be closed. |
07.04.2026-
09.04.2026 | Zero degree line above 3000m
For the first time in 2026, the freezing level in Switzerland will rise above 3,000 metres above sea level for several days in a row. |
| 12.04.2026 | Saharan dust (high intensity)
Sahara dust event with high intensity. |
| 23.05.2026 | Zero degree line above 4000m
For the first time in 2026, the freezing level in Switzerland will rise to over 4000 metres above sea level. |
23.05.2026-
30.05.2025 | First heatwave
Temperatures in the lowlands rose to 29°C or above for several days running, and the freezing level in Valais reached up to 4,300 metres above sea level. May 2026 had been rather cool up to that point. |
| 27.05.2026 | Sahara dust (medium intensity)
Sahara dust event with medium intensity. |
18.06.2026-
30.06.2026 | Second heatwave of 2026
A very long heatwave with temperatures well above 30°. Various June and all-time records were broken. There were several episodes of Saharan dust. The rainfall deficits of recent months led to severe drought and a high risk of forest fires in many places. |
06.07.2026-
16.07.2026 | Third heatwave of 2026
A prolonged heatwave with temperatures above 30°. The lack of rainfall over recent months has led to severe drought and a risk of forest fires in many places. |
Measuring station: Distance and compass direction
The measuring station Jungfraujoch (3582m) is located at a distance of approximately 18km from Gamchi glacier in the direction of E.
Snow depths
The table below lists the snow depth measuring stations located in the vicinity of the Gamchi 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.
| Snow depth measuring station | Height
m a.s.l | Distance
km | Direction | Link |
| Fisi , Kandersteg | 2155 | 11 | WSW | Snow depths |
| Elsige, Frutigen | 2143 | 12 | W | Snow depths |
| Gandegg, Wiler (Lötschental) | 2710 | 10 | SSW | Snow depths |
| Türliboden, Lauterbrunnen | 2332 | 8 | NNE | Snow depths |
| Kandersteg | 1178 | 9 | WSW | Snow depths |
Legend
- Distance: Approximate distance from the Gamchi glacier to the snow depth measuring station.
- Direction: Seen from the Gamchi glacier, the snow depth measuring station is in this direction.
Availability of data
We have been storing the meteor data since 1. December 2023.
Homogenised data from 2020 up to the previous year
You can find the same analysis, using standardised data for the years 2020 to the previous year
here... (External link to www.obeng.ch, the website of Oberli Engineering GmbH)
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.