WeatherRescue.org has used volunteer citizen scientists to rescue >3 million observations taken between 1861-1910. The first set were hourly pressure, temperature, wind, rainfall for the mountain of Ben Nevis and the town of Fort William for 1883-1904. The second set are from the UK Daily Weather Reports, consisting of twice-daily pressure, temperature and daily rainfall observations, for the period 1900-1910. Locations all over Europe are included. The third set is for 1861-1875 from the UK Daily Weather Reports.
University of Reading
Citizen science from previously scanned images