36 places · 1991–2020 normals

Where is it
cool in September?

Daytime highs of 5–16°C, for escaping a northern summer or avoiding heat.

September normals for places qualifying as cool — one place per weather station, at most three per country, largest first
PlaceDayNightRainWet days
Saint PetersburgRussia15.9°C9.4°C57 mm9
YekaterinburgRussia15.1°C6.8°C44 mm8
KrasnoyarskRussia14.4°C4.9°C55 mm11
HelsinkiFinland15.4°C9.3°C56 mm9
ManchesterUnited Kingdom15.8°C8.8°C106 mm13
East LondonSouth Africa16°C8.8°C187 mm15
ChristchurchNew Zealand14.9°C2.6°C41 mm7
AnchorageUnited States13.9°C6.1°C78 mm11
HobartAustralia15.7°C6.9°C56 mm10
VantaaFinland15.7°C7.7°C61 mm9
Puerto MonttChile13.5°C3.9°C115 mm15
ConcepciónChile16°C6°C84 mm8
TrondheimNorway14.6°C7.8°C94 mm13
AberdeenUnited Kingdom15.8°C8.6°C65 mm10
JyväskyläFinland13.9°C5.1°C58 mm9
UmeåSweden14.3°C9°C53 mm8
ReykjavíkIceland11.4°C6.2°C101 mm17
JönköpingSweden15.8°C6.4°C74 mm10
BallaratAustralia14.1°C4.4°C69 mm11
DrammenNorway15.7°C8.3°C98 mm10
LauncestonAustralia15.7°C5.2°C66 mm10
New PlymouthNew Zealand15°C7.7°C117 mm14
Londonderry County BoroughUnited Kingdom15.8°C10.9°C105 mm16
LuleåSweden12.8°C6.2°C63 mm9
InvercargillNew Zealand13.1°C3.5°C80 mm13
NarvaEstonia15.9°C8.1°C67 mm11
ÅlesundNorway14.7°C9.8°C148 mm16
TepliceCzechia13.9°C7.3°C82 mm11
OberurselGermany14.9°C8.4°C83 mm10
SuhlGermany13.7°C7.5°C111 mm11
Kohtla-JärveEstonia15.7°C7°C70 mm11
FairbanksUnited States13°C1.9°C41 mm9
WhitehorseCanada12.2°C2.5°C30 mm7
SchmallenbergGermany13.9°C7.8°C110 mm12
Eagle RiverUnited States12.7°C5.1°C70 mm11
Baie-ComeauCanada15.9°C7.6°C97 mm10

Lists are capped at one place per station because roughly a hundred settlements share each one, and at three per country so a single large country cannot fill the table. A place missing here is not disqualified — it may simply sit behind a bigger neighbour on the same station.