The U.S. Geological Survey (USGS), in cooperation with the New Hampshire Department of Environmental Services (NHDES) and the Department of Health and Human Services (NHDHHS), has developed data to assess the effects of short- and long-term climate change on hydrology in New Hampshire. A USGS Scientific Investigations Report (SIR) documents the datasets developed by the USGS. The data presented in this data release represent future hydrologic climate projections developed using a calibrated USGS Precipitation Runoff Modeling System (PRMS) model using precipitation and air temperature inputs from five general circulation models (GCMs) for two future climate scenarios for the period 2009 to 2099. The data sets include simulated current and future streamflow, groundwater recharge, and snowfall output datasets. Average monthly streamflow time series data sets are provided for 21 streamgages in New Hampshire, 14 of which also provide daily streamflow time series, Average monthly groundwater recharge and snowfall time series for the same reference time frame and future time frame are also provided for each of the 467 hydrologic response units (HRUs) that compose the model.