🚀 Adaptive Parameter Tuning in KENDA-CH1, ICON-CH1-EPS, and ICON-CH2-EPS​

• Adaptive Parameter Tuning, and more - for details see ICON Info: Adaptive Parameter Tuning, and more

✅ Hourly pollen measurements updated every 20 minutes​

The hourly pollen measurements are now updated every 20 minutes, rather than once or twice a day. The data is available in the h_now file for each station ('Item') in the STAC collection ogd-pollen.

More about this open data product.

📆 Additional variables for the ICON-CH1/2-EPS and KENDA-CH1 datasets/collections - announcement​

See details about the upcoming changes in July:

• Numerical weather forecasting model ICON-CH1/2-EPS
• Numerical weather analysis KENDA-CH1

♻️ Open Data service roadmap for Q3-2026 is updated​

See what we plan to work on and when

Important note: It captures intent, not solutions. The further into the future a thing will take place, the more uncertain it is.

♻️ New Open Data landing page​

The new Open Data landing page makes all datasets more easily accessible via a filterable list.

• Datasets that are not yet available but are planned are marked with the label Announced. The planned quarter or half-year is specified in the relevant documentation; see, for example, the radiosoundings
• Datasets that are available but not yet definitive can be marked with the label Experimental; currently we do not have any such cases.

♻️ New release (v3.0.0) of FSDI's STAC API service​

• Our partner swisstopo has deployed a new release of FSDI's STAC API service on 2026-06-30 that slightly changes/fixes the behavior regarding the updated timestamp, details see here.
• This affects all datasets/collections (A to E) available as files.

♻️ Partial relocation of SMN-Station Zürich/Fluntern (SMA)​

• Starting at 11:30 UTC on June 30, 2026, part of the station Zurich/Fluntern (SMA) will be relocated to a new location.
• This affects the following parameters:

Parameter	Location	Swiss LV95 East	Swiss LV95 Nord	Height a.s.l. (m)	Barometric altitude a.s.l. (m)	Effective barometric altitude a.s.l. (m)
Pressure	Old	2685117.87	1248065.64	555.950	557.320	557.380
	New	2685222.58	1248409.57	604.000	604.960	604.960
Temperature / Humidity 2m	Old	2685117.31	1248061.23	555.750
	New	2685230.68	1248405.37	604.000
Temperature 5cm	Old	2685116.06	1248058.27	555.620
	New	2685225.48	1248407.47	604.000
Precipitation	Old	2685118.05	1248058.26	556.660
	New	2685225.48	1248407.47	604.000

• All other parameters remain at the current location.

🚀 Jupyter notebooks for Local Forecast Data​

• To get started quickly, Jupyter notebooks are available, which provide hands-on examples for retrieving and visualizing local forecast data from MeteoSwiss.

🚀 New data - announcement​

• Polar 3D radar products are available via the 'Open Radar Data (ODR)' API, run by EUMETNET's MeteoGate, since 26 May 2026.

🏃‍♀️ MeteoSwiss’ Open Data Service: One Year On – A Review and Outlook​

Since the launch of our Open Data Service on 22 May 2025 (Video), new datasets have been added step by step:

• Radar Products and Local Forecast Data in September 2025,
• Climate Scenarios CH2025 in November 2025,
• Spatial Climate Analyses in April 2026 and – most recently –
• Pollen Forecast Data and KENDA-CH1 Weather Analysis Data on 21 May 2026.

The use of open weather and climate data is growing steadily, and the feedback has been very encouraging.

Behind the scenes, MeteoSwiss has invested heavily in the scalability and stability of the platform to ensure the service remains reliable and performing well – even as the volume of data and the number of users grow.

Here’s what we’ll be working on in the coming months:

• New datasets: Atmospheric Measurement Data and additional Radar Products
• Integrated monitoring of data availability
• A feature API for local forecast data (in collaboration with swisstopo)
• An EDR API for the ICON-EPS-CH1 and -CH2 numerical weather models

Find out more about the available open data and ongoing and planned developments of our service.