Daily cloud-modified erythemal UV index for The Netherlands

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UV archive
overview

Clear-sky UV index:   erythemal == regular archive maps & data
 
 
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Date range:
11 Feb 2025
-- 12 Oct 2025

 
Related RIVM pages (in Dutch):
> representation of this data with a clickable map
> measurements of today's UV index in Bilthoven

 

Comparison with ground-based measurements
at RIVM and KNMI

Comparison of the cloud-modified UV index with RIVM and KNMI UV index measurements is based on the higher resolution (0.05 by 0.05°) data using the location of 'De Bilt' for both institutes and is available up to yesterday.
 
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Comparison for 12 October 2025

(click on image to enlarge)
Comparison with RIVM data Comparison with KNMI data

[ Comparison plot is not available ]

[ Comparison plot is not available ]

Sources of differences:
 >  Variation of cloudiness in space and time
 >  Ozone column value
 >  Presence of aerosols
 >  Measurement times
 >  Grid cell selection
 >  . . .
 
<=== Return to the Cloud-modified UV index monitoring page 		 

 

last modified: 10 October 2025
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