The currency in Estonia is Euro (€), credit and debit cards (chip + PIN) are widely accepted in shops and restaurants. Free Wi-Fi is offered in many places, including buses and trains. The electricity system uses 230 V / 50 Hz and standard “Euro” plugs. English or Russian is spoken by many locals.
The weather in Estonia in April can be quite changeable, from warm sunny days with temperatures above 15°C to occasional minus temperatures during the night.
For actual weather please check:
Weather forecast for Tartu (www.wunderground.com)
Weather forecast for Tartu (www.yr.no)