Leuven.cool Citizen Science Urban Weather Station Network
Over 1 billion raw observations from ~110 low-cost weather stations spread across Leuven (Belgium), at 16-second resolution from June 2019 to March 2025.
- Size
- 12.9 GB
- Format
- CSV, CSV.gz
- License
- CC-BY-NC-4.0
- Access
- Open Access
- Source
- Zenodo (record 14893734)
License note: Non-commercial
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Challenge
Is there a measurable urban heat-island effect across Leuven — are some stations systematically warmer than others, and does the gap grow at night or in summer?
- Where to start
- This is a billion-row dataset: do NOT load it whole. Use DuckDB or chunked reading on one quarter's file first, aggregate temperature per station and hour, then compare a few stations.
- What to share
- A map or chart of station-level temperature differences and a short interpretation. Note which technique you used to handle the size.
Share your results and questions in the forum. Challenges are open-ended — there's no single right answer.