WeatherWhether derived monthly climate database, 2001–2025 SOURCE AND ATTRIBUTION CRU TS 4.10, Climatic Research Unit, University of East Anglia. Release: cruts.2604091129.v4.10 https://crudata.uea.ac.uk/cru/data/hrg/cru_ts_4.10/ Harris I, Osborn TJ, Jones P and Lister D (2020). Version 4 of the CRU TS Monthly High-Resolution Gridded Multivariate Climate Dataset. Scientific Data 7, 109. https://doi.org/10.1038/s41597-020-0453-3 LICENCE This derived database is made available under the Open Database License (ODbL) 1.0: https://opendatacommons.org/licenses/odbl/1-0/ Individual contents are subject to the Database Contents License: https://opendatacommons.org/licenses/dbcl/1-0/ Preserve attribution and applicable share-alike obligations. These data licences do not assign a licence to the application code. MODIFICATIONS AND LIMITATIONS WeatherWhether calculated the arithmetic mean of each calendar month over 2001–2025, inclusive. All 300 source months per variable were included. Each of 67,420 valid grid cells has all 25 values for each calendar month. Native 0.5-degree resolution is preserved; no spatial interpolation was applied. Web values are rounded to 0.1 units (maximum error 0.05). This is a 25-year climatology, not a forecast or an official 30-year normal. Source station counts and uncertainty fields are not displayed. The source covers global land except Antarctica. Oceans and some small islands lack coverage. Coarse cells do not resolve local mountain climates. Precipitation does not distinguish rain from snow; cloud percentage does not give sunny or cloudy-day counts. Sunshine duration is not included. Wet days are days receiving at least 0.1 mm of precipitation. The optional weather-fit-v1 score is computed in the browser from these monthly means using user-selected temperature and weighting preferences. It is a heuristic preference match, not a probability or a validated tourism index. It does not use additional climate observations. The complete formula and weights are in the application's data information dialog and scoring.js. CSV exports record the model version, preference names, scores and bands. The binary downloads below remain the original four climate layers. ENCODING AND DOWNLOADS metadata.json provides filenames, file sizes, SHA-256 hashes, units, provenance and complete grid metadata. All 12 gzip files are downloadable relative to that index as month-01.bin.gz through month-12.bin.gz. Decompress each file with gzip. Each file holds four consecutive 360x720 unsigned little-endian 16-bit grids, in this order: tmp, pre, wet, cld. Rows run north to south, columns west to east. Cell centres run from 89.75 to -89.75 degrees latitude and -179.75 to 179.75 longitude. 65535 means missing and must not be decoded as a numeric weather value. For temperature: degrees Celsius = stored_value / 10 - 100. Other layers: value = stored_value / 10; units mm/month, days/month, %. The full-resolution float32 means and sample counts are also preserved in the local project data/cru_ts_4.10/processed/monthly_climatology_2001_2025.npz. BASEMAP Country outlines: Natural Earth, public domain. https://www.naturalearthdata.com/about/terms-of-use/ Source geometry: ne_110m_admin_0_countries.geojson from the Natural Earth repository https://github.com/nvkelso/natural-earth-vector Coordinates rounded to 0.001 degrees for a smaller display asset. Country boundaries are geographic context, not a legal determination.