12 hot days so far, 4th of Prague's 56 summers.

Its hottest single day, 39.6 °C, is the hottest this station has recorded by this date. A count and a peak are different claims and neither borrows the other's rank.

Prague is compared against 1991-2020, not 1961-1990. This thermometer starts in 1971, so the earlier window every other city uses would cover only its warmer final years here, and a figure against that would look like every other city's while meaning something weaker. 1991-2020 is complete for this station, so it is the one shown. The count and the rank are measured on the full record and stand.

Hot here means 31.6 °C or above, a level about one summer day in twenty used to reach at this station between 1971 and 2000. The bar has not moved; the number of days clearing it has. Every year is counted to 31 July, so a part-finished summer is never set against complete ones. That threshold is Prague's own. It is not a national standard and it is not comparable with another city's: every figure on this page is measured against this station and nothing else.

5 nights so far that never dropped below 20 °C. No multiple is quoted here. Prague averages about 0.1 a year, and dividing by a base that thin produces a large number and no evidence. 24 of the 42 cities are gated this way.

The hottest day of Prague's summer, to the same date, with 2026 marked. The previous best was 39.0 °C in 1983, the dot on the drop line below it, and a typical summer here peaks at 34.3 °C.

42 cities are measured this way, each against its own record. See them on the map