Meteo and climate data on the Oberaar glacier: Monthly data
The graph below shows meteoro and climate data from the MeteoSwiss measuring stations located in the vicinity of the Oberaar glacier. Monthly data.
Deviations of the annual values from the climate standard values 1991-2020
Measuring station: Grimsel Hospiz (1980m), Year 2026
The definitive deviations for this year will be displayed from 1 January 2027.
| Physical quantity | Annual value | Standard value | Deviation | Unit |
| Temperature | 4.9 | 2.3 | +2.6 | °C |
| Precipitation | 1097 | 1834 | -737 | mm |
| Sunshine duration | 1632.5 | 1434.8 | +197.7 | Std. |
| Global radiation | 177.6 | 152.7 | +24.9 | W/m2 |
Source of the basic data: MeteoSwiss
Deviations of the monthly temperature values from the climate norms 1991-2020
Measuring station: Grimsel Hospiz (1980m), Year 2026
The definitive deviations for this November 2026 will be displayed from 1 December 2026.
| month | Monthly value
°C | Standard value
°C | Deviation
°C |
| January 2026 | -4.8 | -4.5 | -0.3 |
| February 2026 | -2.2 | -4.9 | +2.7 |
| March 2026 | -2.5 | -2.6 | +0.1 |
| April 2026 | 3.3 | 0.2 | +3.1 |
| May 2026 | 6.1 | 4.3 | +1.8 |
| June 2026 | 11.6 | 8.2 | +3.4 |
| July 2026 | 13.1 | 10.2 | +2.9 |
| August 2026 | 13.6 | 10.3 | +3.3 |
| September 2026 | 10.2 | 6.9 | +3.3 |
| October 2026 | 5.3 | 4.0 | +1.3 |
| November 2026 | 1.0 | -0.7 | +1.7 |
| Year 2026 | 5.2 | 3.1 | +2.1 |
Source of the basic data: MeteoSwiss
Deviations of the monthly precipitation values from the climate norms 1991-2020
Measuring station: Grimsel Hospiz (1980m), Year 2026
The definitive deviations for this November 2026 will be displayed from 1 December 2026.
| month | Monthly value
mm | Standard value
mm | Deviation
mm |
% |
| January 2026 | 81.0 | 190.1 | -109.1 | -57.4 |
| February 2026 | 237.3 | 163.2 | +74.1 | +45.4 |
| March 2026 | 203.3 | 169.1 | +34.2 | +20.2 |
| April 2026 | 23.5 | 150.2 | -126.7 | -84.4 |
| May 2026 | 136.1 | 158.6 | -22.5 | -14.2 |
| June 2026 | 91.2 | 127.3 | -36.1 | -28.4 |
| July 2026 | 65.9 | 126.3 | -60.4 | -47.8 |
| August 2026 | 112.8 | 139.4 | -26.6 | -19.1 |
| September 2026 | 27.6 | 128.6 | -101.0 | -78.5 |
| October 2026 | 93.8 | 129.3 | -35.5 | -27.5 |
| November 2026 | 24.4 | 78.3 | -53.9 | -68.8 |
| Year 2026 | 1096.9 | 1560.4 | -463.5 | -29.7 |
Source of the basic data: MeteoSwiss
Deviations of the monthly sunshine duration values from the climate standard values 1991-2020
Measuring station: Grimsel Hospiz (1980m), Year 2026
The definitive deviations for this November 2026 will be displayed from 1 December 2026.
| month | Monthly value
hrs | Standard value
hrs | Deviation
hrs |
% |
| January 2026 | 60.2 | 71.6 | -11.4 | -15.9 |
| February 2026 | 78.2 | 95.2 | -17.0 | -17.9 |
| March 2026 | 143.7 | 128.7 | +15.0 | +11.7 |
| April 2026 | 210.0 | 123.0 | +87.0 | +70.8 |
| May 2026 | 193.1 | 135.3 | +57.8 | +42.7 |
| June 2026 | 195.4 | 158.2 | +37.2 | +23.5 |
| July 2026 | 234.1 | 177.7 | +56.4 | +31.8 |
| August 2026 | 175.7 | 169.1 | +6.6 | +3.9 |
| September 2026 | 209.5 | 139.8 | +69.7 | +49.9 |
| October 2026 | 110.7 | 114.9 | -4.2 | -3.6 |
| November 2026 | 21.8 | 29.9 | -8.1 | -27.2 |
| Year 2026 | 1632.5 | 1343.4 | +289.1 | +21.5 |
Source of the basic data: MeteoSwiss
Deviations of the monthly global radidiation values from the climate norms 1991-2020
Measuring station: Grimsel Hospiz (1980m), Year 2026
The definitive deviations for this November 2026 will be displayed from 1 December 2026.
Only whole months are taken into account when calculating the total.
| month | Monthly value
W/m2
kWh/m2 | Standard value
W/m2
kWh/m2 | Deviation
W/m2
kWh/m2 |
% |
| January 2026 | 63.1
47.0 | 62.8
46.7 | +0.3
+0.2 | +0.5 |
| February 2026 | 98.9
66.5 | 108.6
73.0 | -9.7
-6.5 | -8.9 |
| March 2026 | 173.1
128.8 | 170.1
126.6 | +3.0
+2.2 | +1.8 |
| April 2026 | 255.9
184.3 | 219.7
158.2 | +36.2
+26.1 | +16.5 |
| May 2026 | 260.3
193.7 | 234.7
174.6 | +25.6
+19.1 | +10.9 |
| June 2026 | 263.3
189.6 | 238.1
171.4 | +25.2
+18.1 | +10.6 |
| July 2026 | 276.0
205.3 | 233.9
174.0 | +42.1
+31.3 | +18.0 |
| August 2026 | 205.6
153.0 | 201.2
149.7 | +4.4
+3.3 | +2.2 |
| September 2026 | 193.9
139.6 | 152.8
110.0 | +41.1
+29.6 | +26.9 |
| October 2026 | 103.6
77.1 | 101.4
75.4 | +2.2
+1.6 | +2.2 |
| November 2026 | 60.4
20.3 | 60.9
20.5 | -0.5
-0.2 | -0.8 |
| Year 2026 | 184.1
1405.0 | 167.7
1280.1 | +16.4
+124.9 | +9.8 |
Source of the basic data: MeteoSwiss
Unusual weather, climate and natural events
The following unusual weather, climate and natural events occurred in 2026:
| Date | Title, description |
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-
30.05.2026 | 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. |
29.07.2026-
05.08.2026 | Fourth 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. |
09.08.2026-
15.08.2026 | Fifth 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. |
26.08.2026-
28.08.2026 | Saharan dust (high intensity)
High-intensity Saharan dust event (463ug/m3). |
| 28.08.2026 | Severe thunderstorm
A severe thunderstorm accompanied by hail is expected to cause damage amounting to several hundred million Swiss francs in the northern parts of Switzerland. |
| 01.09.2026 | Drought situation
The winter of 2025/26, which saw little snow, and the various heatwaves of the summer of 2026 led to an acute drought, which left its mark on the landscape and caused streams and springs to dry up.
Current precipitation deficits for the period 1 October 2025 – 31 August 2026:
- Grimsel Hospiz (1980m) = 460mm / 27.1%
- Napf (1406m) = 490mm / 32.4%
- Koppigen (486m) = 252mm / 26.8%
Basis: Climate norm values 1991–2020, measurement data from MeteoSchweiz.
A few minor rainfall events will not be enough to make up for these deficits. |
| 01.10.2026 | Drought situation
The winter of 2025/26, which saw little snow, and the various heatwaves of the summer of 2026 led to an acute drought, which left its mark on the landscape and caused streams and springs to dry up.
Current precipitation deficits for the period 1 October 2025 – 30 September 2026:
- Grimsel Hospiz (1980m) = 460mm / 27.1%
- Napf (1406m) = 490mm / 32.4%
- Koppigen (486m) = 327mm / 31.8%
Basis: Climate norm values 1991–2020, measurement data from MeteoSchweiz.
A few minor rainfall events will not be enough to make up for these deficits. |
Measuring station: Distance and compass direction
The measuring station Grimsel Hospiz (1980m) is located at a distance of approximately 10km from Oberaar glacier in the direction of ENE.
Snow depths
The table below lists the snow depth measuring stations located in the vicinity of the Oberaar 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 Oberaar glacier to the snow depth measuring station.
- Direction: Seen from the Oberaar glacier, the snow depth measuring station is in this direction.
Availability of data
Meteorological data is available from 2015 to the present day.
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.