"The highest recordings have been in eastern Småland and southern Östergötland. Malexander had 33.4 degrees, Hagshult and Jönköping airport measured 33.1 and Örebro 32.6 degrees," said Nils Holmqvist at meteorological office SMHI.
Sunday's 35 degree high is thus the highest temperature recorded in Sweden since 1994. The Swedish record is 38 degrees, recorded in Ultuna in 1933 and in Målilla in 1947.
But not all parts of Sweden enjoyed hot dry weather on Sunday with a storm front pushing in rain and thunder from the west.
SMHI issued a class one (on a climbing scale of four) storm warning for lightning in Värmland, Halland and västra Götaland during Sunday evening. Värmland experienced tornado winds and several trees fell victim to the storm.
"We have a front with rain which can contain thunder, which is moving from Skåne up through Småland towards Uppland over the coming day," said Nils Holmqvist.
Despite the rains, the heat is set to continue with Monday and Tuesday offering hot, dry weather across many parts of the country.
Östra Götaland and Svealand will experience a continue heat wave with temperatures above 30, although Sunday's high is not expected to be exceeded, according to SMHI. The remainder of the country will experience cooler temperatures in the region of 20-25 degrees.
More rain is expected to sweep in across the country on Tuesday, moving north-east over Götaland, Svealand and southern Norrland. In Svealand and southern Norrland heavy rains are forecast, with the wet weather extending to central Norrland.