Depending on the location of orchards and regions, tree nut production was affected by bad weather conditions such as less rainfall in autumn 2016 and winter 2017 which led to drought in certain regions in which tree nut orchards are located. The cumulative rainfall between October, 2016, and June, 2017, was less than the normal and previous-year values. The rain fall during the spring increased in all regions, except Marmara region compared to normal values. However such an increase has not led to an increase in the production of tree nuts except hazelnut. Also, the frost in late March and April and unexpected May and June hail storms in certain regions, created production losses of tree nuts in MY 2017. Pistachio is the most negatively affected commodity with around 50 percent loss of production compared to the previous year due to weather conditions and being off-year. Post forecasts pistachio production at 80,000 metric ton (MT), walnut production 58,000 MT and almond production at 14,100 MT in MY 2017.Hazelnut is the least affected commodity by weather conditions and there is a considerable increase in hazelnut production in MY 2017 compared to the previous year. Post forecasts hazelnut production at 700,000 MT in MY 2017, up from 460,000 MT last year.