The dataset provides access to the river ice thickness, snow cover and monthly climate database at the North-East of Russia (including the Kolyma River basin, the Chukchi Peninsula and the Okhotsk sea river basins) located within the continuous or discontinuous permafrost zone. The dataset contains once every five days values of river ice thickness and snow cover on the ice for 49 hydrological gauges of the North-East of Russia. The median length of observations series is 40 years with minimum and maximum values reaching 8 and 79 years respectively. Additionally monthly air temperature and precipitations for 14 meteorological stations of the region (missing from public access up to this point) for the period from 1966 to 2012 is presented.