The previous warmest ever night in Latvia was recorded in 2012 (June 20 to 21) and 1931 (July 28 to 29), both in Rīga, when the lowest temperature on these nights were 23.7 degrees Celsius.
Temperatures in Rīga at midnight were at around 27.3 degrees Celsius last night, but early this morning were at 24.4 degrees Celsius.
As for the rest of Līgo day today, forecasters are predicting more high temperatures of up to +33 C with thunderstorms, sometimes violent, increasing in frequency during the afternoon.
Please take care in the high temperatures, if you're going for a swim in a lake, and especially if you'll be lighting a bonfire.