6 hot days so far, 21st of Stockholm's 76 summers.
summer of 1961-19902.5
this summer6
Hot here means 28.3 °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 8 August, so a part-finished summer is never set against complete ones. That threshold is Stockholm'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.
The 20 °C night is a Mediterranean measure and Stockholm is outside its range. None this year, and one night in the whole of 1961-1990 by this date. No multiple is quoted, because dividing by a base that thin is arithmetic rather than evidence. 24 of the 42 cities are gated this way.
Stockholm's hottest day this year, 30.6 °C, is 23rd on this record. The previous best is 35.1 °C in 1975, the dot on the drop line. A typical summer here peaks at 29.6 °C. Its hot-day count is 21st of 76: a count and a peak are different claims, and neither borrows the other's rank.
42 cities are measured this way, each against its own record. See them on the map