Hourly, validated and automated in-situ ground-based meteorological observations in the Netherlands

KNMI collects in-situ meteorological observations in the Netherlands aggregated into hourly, daily, monthly, and annual datasets. These data are derived from the 10-minute automatic measurements since the early 1990s, hourly observations from 1951 and daily observations from 1901. The earliest data starts in 1901 with one station and gradually increases to the current measurement network of more than 50 automatic weather stations.



The weather stations measure essential climate variables (ECVs), surface precipitation, pressure, global radiation, temperature, water vapor, wind speed and direction, clouds, and visibility. Sunshine duration and potential evapotranspiration are calculated from the ECVs. When applicable, minima, maxima, means, and sums are defined or calculated.



This dataset contains meteorological observations since 1951-01-01 at an hourly interval. The data has undergone manual validation by KNMI experts, filling gaps and correcting measurement errors, after which it becomes available. The expert validation can take 1-10 working days to complete. Validated data can be modified at any moment in the future if further issues are found with the data.

Simple

Date (Publication)
2025-09-19
Edition

1
Citation identifier
urn:xkdc:ds:nl.knmi::hourly-in-situ-meteorological-observations-validated/1.0/
Status
On going
Point of contact
Organisation name Individual name Electronic mail address Role

Koninklijk Nederlands Meteorologisch Instituut (KNMI)

opendata@knmi.nl

Point of contact
Maintenance and update frequency
Continual

DG Discovery Properties Vocabulary 1.0

  • Temperature

  • Pressure

  • Wind speed

  • Wind direction

  • Relative humidity

  • Wind gust

  • Visibility

  • Precipitation

  • Radiation

  • Sunshine

  • Weather code

  • Precipitation rate

  • Precipitation duration

  • Maximum temperature

  • Minimum temperature

  • Dewpoint temperature

  • Air temperature

  • Meteorological

  • Automatic weather stations

  • Observations
Keywords

  • Dynamic

  • Open data

GEMET - INSPIRE themes, version 1.0

  • Meteorological geographical features

  • Atmospheric conditions
Use limitation

Because of station relocations and changes in observation techniques, the data in these datasets are inhomogeneous. As a result, these series are not suitable for trend analysis.

Access constraints
Other restrictions
Other constraints

https://creativecommons.org/licenses/by/4.0/deed.nl

Classification
Unclassified
Spatial representation type
Vector
Language
English
Character set
UTF8
Topic category
  • Climatology, meteorology, atmosphere
N
S
E
W
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Begin date
1951-01-01
End date
9999-12-31
Supplemental Information

For more information about this dataset, please read the [technical documentation]( https://english.knmidata.nl/open-data/hourly-daily-monthly-and-annual-in-situ-meteorological-observations).



The following related datasets are available:



* [Near real-time 10-minute automated in-situ ground-based meteorological observations in the Netherlands]( https://dataplatform.knmi.nl/dataset/10-minute-in-situ-meteorological-observations-1-0)

* [Daily, validated and automated in-situ ground-based meteorological observations in the Netherlands]( https://dataplatform.knmi.nl/dataset/daily-in-situ-meteorological-observations-validated-1-0)

* [Hourly and automated in-situ ground-based meteorological observations in the Netherlands]( https://dataplatform.knmi.nl/dataset/hourly-in-situ-meteorological-observations-1-0)

* [Daily and automated in-situ ground-based meteorological observations in the Netherlands]( https://dataplatform.knmi.nl/dataset/daily-in-situ-meteorological-observations-1-0)



For more information about the relation between these datasets, see also the [technical documentation]( https://english.knmidata.nl/open-data/hourly-daily-monthly-and-annual-in-situ-meteorological-observations)

Reference system identifier
http://www.opengis.net/def/crs/EPSG/0/4326
Distribution format
Name Version

NetCDF

4
Distributor contact
Organisation name Individual name Electronic mail address Role

Koninklijk Nederlands Meteorologisch Instituut (KNMI)

opendata@knmi.nl

Point of contact

Digital transfer options

Transfer size
1
OnLine resource
Protocol Linkage Name

landingpage

 		https://dataplatform.knmi.nl/catalog/datasets/index.html?x-dataset=hourly-in-situ-meteorological-observations-validated&x-dataset-version=1.0

KNMI Data Platform
Hierarchy level
Dataset

Quantitative result

Value

Data completeness depends on the period and variable, for more information refer to the technical documentation.
Statement

KNMI Robuust Klimatologisch Informatie Systeem (RobuKIS)

Metadata

File identifier
4c151b83-242a-11f0-9427-ac91a1330236 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2025-12-09T13:02:51.356037Z
Metadata standard name

ISO 19115
Metadata standard version

ISO 19115:2003 NL Kernset 1.3 KNMI 2.1.0
Metadata author
Organisation name Individual name Electronic mail address Role

Koninklijk Nederlands Meteorologisch Instituut (KNMI)

opendata@knmi.nl

Point of contact
Other language
Language Character encoding
Dutch; Flemish
English UTF8
 
 

Overviews

Spatial extent

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Keywords



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