Temperatures of up to +35°C in Serbia forecasted for 4. October 2020 should overwrite all-time temperature records.
Temperatures 10-15°C above seasonal average very probably hit Balkan and Central Europe next weekend and early subseuent week (Sunday - Tuesday 3.-5. October 2020), with maximum possible temperatures of up to +35°C in Central Balkan (Serbia), +32°C in Hungary, +30°C in Slovakia and +26°C in Poland according Friday 12Z GFS outputs.
Runs GFS from 12Z are more reliable such these from the night (00Z, 06Z), but night outputs too predicts very high temperatures above Balkan, of up to +30/+32°C in Serbia and +25°C in Poland / Slovakia between 3.-5. October.
Considering current extreme Atlantic hurricane season, it should be last chance for summer days in Central Europe and last chance for tropical days in northern parts of Balkan, because after 15. October, a wet phase of MJO above Atlantic is predicted and next hurricanes and tropical storm round, with next possible windstorms and coldwaves in Europe, maybe with first snowing too.
While this Sunday (27.9.) will be cold, next Sunday will be starting a big warm spell, or maybe even last heatwave in northern parts of Europe (with moderate climate), therefore, after windy, rainy and cold weekend be happy, that next Sunday we can use for outdoor activities, tourism or going to the city (if COVID restrictions will allowing it). Current coldwave is namely linked with increasing trend of COVID cases - the worst ever, therefore, will be safe and careful, because colder autumn 2020 and start of winter 2020/21 is expected /https://mkweather.com/2020/08/22/europe-autumn-2020-forecast-mkweather-accuweather-maps-and-analysis/; https://mkweather.com/2020/07/29/first-forecast-for-winter-2020-21-early-powerful-coldwaves-nov-dec-then-weakening-of-cold-pattern-and-warm-jan-feb-mar/; https://mkweather.com/2020/09/24/updated-forecast-for-winter-2020-21-still-nao-ao-in-first-half-of-winter-nao-ao-in-second-half-of-winter-permanent-la-nina-and-surprisingly-easterly-qbo-possible//.