36 places · 1991–2020 normals

Where is it
cool in October?

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

October normals for places qualifying as cool — one place per weather station, at most three per country, largest first
PlaceDayNightRainWet days
MoscowRussia8.6°C2.8°C71 mm11
LondonUnited Kingdom14.7°C8.3°C80 mm11
Saint PetersburgRussia8.6°C4°C63 mm12
HarbinChina12.6°C1.4°C30 mm5
ChangchunChina13.6°C2.6°C27 mm4
BerlinGermany14°C6.6°C44 mm8
ÜrümqiChina14.3°C4.4°C25 mm4
TorontoCanada14.8°C7.6°C73 mm10
HamburgGermany13.6°C6.3°C63 mm11
MontréalCanada13.3°C6°C113 mm11
MinskBelarus10.3°C3.4°C56 mm10
ViennaAustria14.7°C7.6°C47 mm7
NovosibirskRussia7.9°C-0.3°C42 mm10
AstanaKazakhstan10.4°C0.4°C23 mm5
StockholmSweden10.1°C5.5°C51 mm9
MunichGermany14.4°C6.1°C67 mm10
CalgaryCanada11.3°C-1.4°C19 mm4
CopenhagenDenmark12.5°C6.7°C67 mm11
OsloNorway9.6°C3.8°C94 mm11
DublinIreland14.2°C6.9°C83 mm12
BrusselsBelgium15°C8.2°C66 mm11
RotterdamThe Netherlands14.9°C7.6°C86 mm13
SeattleUnited States15.9°C8.2°C89 mm11
AmsterdamThe Netherlands14.7°C7.8°C86 mm13
WrocławPoland14.4°C4.1°C40 mm8
HelsinkiFinland9.1°C4.2°C73 mm10
GlasgowUnited Kingdom12.8°C6.7°C134 mm15
GothenburgSweden12°C6.3°C104 mm13
ManchesterUnited Kingdom11.8°C6°C142 mm16
MilwaukeeUnited States15.8°C6.8°C70 mm7
PoznańPoland13.6°C4.4°C38 mm9
AntwerpBelgium15.3°C7.6°C68 mm11
Homyel'Belarus11°C3.1°C65 mm9
AktobeKazakhstan12.8°C1°C29 mm6
KaragandyKazakhstan11.2°C0.1°C21 mm5
The HagueThe Netherlands15.1°C9.2°C87 mm12

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.