Climate Explorer

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The KNMI Climate Explorer is a tool to investigate the climate. Start by selecting a class of climate data from the right-hand menu's (Select a time series or Select a field). After you have selected the climate data of interest, you will be able to investigate it, correlate it to other data, and generate derived data from it.

Some restrictions are in force: the site does not remember how you filled out the forms, you cannot define your own indices, nor upload data into the Climate Explorer or handle large datasets. If you want to use these features please log in or register.

Relative precipitation anomalies wrt 1981-2010 [fraction] in yr0 2023 (source: GPCC). More under "World weather"
Increasing trend in precipitation anomalies (1981-2010)
News
17-apr-2025A new side menu section Toolbox Attribution Studies has been added with the existing Attribution Runs feature and two new tools - Analogues and Synthesis.
04-feb-2025We will soon be deploying a new IP whitelisting feature in an attempt to block automated spam traffic and hopefully improve performance for legitimate users. This will require you to click on a confirmation button. After clicking, you will not be asked again until you change network (e.g. connect to a VPN, travel to another location). We will not require any personal information during this process. Please report problems you encounter to the administrator.
16-dec-2024Climate Change Atlas updated to include KNMI23 CMIP6 data and AR6 regions. You may have to refresh your browser to see the new version. Please report issues to the administrator.
28-oct-2024Provide PDO from HadISST, COBE2 and ERSST5
28-oct-2024Updated E-OBS to the Copernicus version 30.0e
07-oct-2024Look and feel of side menu reworked. You may need to refresh your browser for the changes to take effect. Please report issues to the administrator.
more... 

Select a time series

Daily station data
Daily climate indices
Monthly station data
Monthly climate indices
Annual climate indices
View, upload your time series

Select a field

Daily fields
Monthly observations
Monthly reanalysis fields
Monthly and seasonal historical reconstructions
Monthly seasonal hindcasts
CMIP and NL scenario runs
CMIP3+ scenarios
CMIP5 scenarios
CMIP6 scenarios
EU44 CORDEX scenarios
KNMI2023 NL Scenarios
Annual CMIP5 extremes
View, upload your field

Toolbox Attribution Studies

Attribution runs
Analogues
Synthesis

© 2022 KNMI (results, code) / World Meteorological Organization (WMO) (design)
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Select a region
IPCC AR5 WG1 AR6 IPBES countries place box help
Select a season
Season: , months help
Select a dataset and variable
help
help
  absolute relative are shown help
map time series help
Map options
help
help
Reference period: -
Future period: -
help
May take up to half an hour the first time a season / measure is selected
Users are strongly advised to study the short introduction. Specific help is available under the help icons.

Further information

Short introduction
CMIP Phase 6 (CMIP6) - KNMI
CMIP Phase 6 (CMIP6) - Project Page
KNMI National Climate Scenarios 2023 for the Netherlands
SSP scenarios
KNMI'23-klimaatscenario's (Dutch)
IPCC WG1 AR5 report, notably Annex I "Atlas"
CMIP5 co-ordinated climate model experiments
RCP scenario's

Funding

KNMI
SPECS
Red Cross / Red Crescent Climate Centre
Dutch Ministry of Infrastructure and Environment, DGMI
Updates
16-dec-2024Climate Change Atlas updated to include KNMI23 CMIP6 data and AR6 regions. You may have to refresh your browser to see the new version. Please report issues to the administrator.
11-apr-2022The Climate Change Atlas is converted to use python3.
14-mar-2022Fix for plots with transparancy (ghostscript options) and maps (updated version of NCL) in the Climate Change Atlas.
03-mar-2022Applied fix for plotting time series with the Climate Change Atlas and a fix for creating country masks that were not created in advance.
14-oct-2021In memoriam Geert Jan van Oldenborgh.

With deepest sadness, we share with you that Geert Jan van Oldenborgh (59), initiator, creator and maintainer of the Climate Explorer, sadly passed away on Tuesday 12 October. Geert Jan's contribution to climate science is immense and he will be sorely missed.
30-apr-2021Updated the Atlas to use ERA5, HadCRUT5 and 20CRv3.
04-jun-2020Making time series plots in the Atlas with tranaparancy works again (thanks Michael).
27-may-2019Fixed colour scale of Atlas sea level pressure plots (thanks Indrani).
16-may-2019The bugfix of two days ago does not work properly and I cannot find one that does, so I turned off PDF generation for Atlas time series for the time being. Please use the EPS or PNG plots.
14-may-2019Fixed a bug in the Atlas time sersies that I called the system ghostscript that does not support transparency, now call the one that does (thanks Michael).
18-apr-2019Added Reconstructed scPDSI for Australia/New Zealand Drought Atlas (thanks Jonathan)
28-dec-2017Fixed a bug in the Atlas that caused regressions not to work (thanks Simon).
11-jul-2018Chromium seems to submit forms twice, which can lead to corrupted data. I am trying to eliminate that but use another browser for the time being.
07-nov-2018Fixed a bug that caused mysterious error messages in time series generation.
09-feb-2018Added SREX masks for temperature observation analysis (thanks Wagner).
07-jan-2018For two weeks incorrectly propagated metadata in time series could have caused problems. This should be fixed now.
14-dec-2016Fixed a bug that prevented 20CR timeseries from being plotted.
12-dec-2016Fixed a bug that prevented extreme plots from appearing (thanks Sjoukje).
17-may-2016Fixed a bug that caused time series computations to stop with "reanalysis boundaries" (thanks Ousmane).
16-may-2016Added EUR-44 CORDEX data to the Climate Explorer and Atlas (thanks Urs).
12-jan-2016The storage server from which the Climate Explorer gets its data will be rebooted this day. This may degrade performance a bit.
05-jan-2016Added IPBES regions and subregions.
04-jan-2016Deleted spurious lines in the maps of Italy, Kyrgyzstan, Mozambique, South Africa, United Arab Emirates and Uzbeikstan.
04-jan-2016The Atlas now also uses the whole page rather than only 800 pixels.
27-nov-2015Deleted the country Readme between Qatar and Romania (thanks Boris).
05-nov-2015The Atlas cache has been moved to a new data store, this should not make much difference.
24-sep-2015Deleted the MIRO-ESM and MIROC-ESM-CHEM Txx as it reached 80 °C in the deserts.
15-sep-2015Question: would RCM data (eg from CORDEX) be useful in the Atlas? Please contact me if you need other data.
12-may-2015Fixed a bug in the KNMI Climate Change Atlas: time series of some countries could not be computed (thanks Paul).
12-may-2015Fixed a bug in the KNMI Climate Change Atlas: RCP4.5/RCP6.0/RCP8.5 combined maps did not plot for the full CMIP5 ensemble (thanks Paul).
31-jan-2014Fixed bug that absolute and relative regression trend maps had the same file name, whichever was computed first would always be shown.
31-dec-2014Added states of the US.
20-aug-2014Removed INMCM4 and IPSL-CM5B-LR from the fd (frost days) ensemble because they have far too many frost days in tropical regions and Europe (thanks Claudia).
15-aug-2014Changed the presentation of differences in extreme variables that count the number of days (frost days, ice days, ...), so that areas with less than one day per year in the current climate stay white (thanks Claudia).
10-jul-2014Fixed a bug in the trends (regressions) where only one percentile plot was shown as the name was not unique across percentiles.
23-may-2014Upgraded CRU TS to version 3.21 (thanks Michael).
22-may-2014Fixed a bug introduced two days ago that prevented time series of seasons being computed (thanks Michael).
20-may-2014Fixed a bug that prevented non-linear trends of annual (extreme) data to be computed.
20-may-2014Fixed a bug that prevented time series of relative anomalies annual time series to be computed.
19-may-2014Switched to the CCCMA altcdd and altcwd to avoid problems in 2005 and 2006 in almost always dry/wet regions (thanks Slava).
19-may-2014Maps with the combined scenarios RCP4.5/RCP6.0/RCP8.5 now also work for extremes, where it is most useful (thanks Andreas).
14-may-2014Fixed a bug that for time series the scenarios would always be selected if they had once been selected (thanks Albert).
09-jan-2014Changed the way countries are treated: if a region (island) is too small to have a grid point in the interior it contributes proportional to its area. This way small countries still give a result, even though it may not be completely representative of the area of the country itself.
03-jan-2014Added all countries and autonomous regions of the world to the list of predefined regions. Please let me know if you prefer to have sub-categaries like I made for the Netherlands, France.
22-dec-2013Added soil moisture, please note that the reliability is not very high.
06-dec-2013Implemented remembering forms for nonimous users. This shoudl also improve the user experience on tablets and smartphones.
28-nov-2013Added CCCMA ETCCDI CMIP5 annual extremes, it looks as if I have fixed the bugs, please let me know if you find suspicious results.
21-nov-2013Added CMIP5 relative humidity.
16-nov-2013Added observational datasets.
13-nov-2013Added ERA-interim, 20CR.
13-nov-2013Added CMIP3.
13-nov-2013Regression-based trends also work now.
06-nov-2013Time series of relative changes over non-standard meteorological seasons still had a problem up to now, fixed (thanks Maarten).
06-nov-2013Time series now work well for relative and absolute values as far as I can see. Please disregard results obtained before now.
06-nov-2013Maps did not work for half a day due to a typo.
01-nov-2013I think I got the time series section to work as well. Please report bugs.
26-oct-2013Added evaporation, net water flux (P-E), Tmin, Tmax, specific humidity, surface solar radiation (downward) and sea-level pressure.
25-oct-2013Maps of differences of temperature and precipitation of other lengths now also include hatching.
17-oct-2013Maps of 20-yr differences of temperature and precipitation work and for the seasons in the IPCC WG1 Ar5 Annex I "Atlas" give the same results.

© 2022 KNMI (results, code) / World Meteorological Organization (WMO) (design)
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