Indeed, @Shalop! And it's a new record for a month of June (warmest minimum), at Nice.
26°C (so, exactly 78.8°F, a little below the 80 mark)...
There have been in France, four values of minimums not getting below 30°C; the following:
Marignana, Corsica, with 30.5°C / 86.9°F (1st August 2017);
Perpignan, Roussillon, with 30.3°C / 86.5°F (4th August 2018);
Menton, Riviera, with 30.3°C / 86.5°F (6th August 2003);
Calvi, Corsica, with 30.0°C / 86.0°F (14th August 2003).
There have been a few summers in Nice, where the temperature
never (!) got below 20°C during the whole July/August period and a little beyond, on either side (June/September).
It is even more the case for stations such as Menton, Cap Corse, L'Ile-Rousse or Porto-Vecchio...