Coolcation

Where it's cool in September

A coolcation, on this site, is anywhere with a mean daily high at or below 18°C. September gives you 48 of the 295 curated destinations with a ten-year record this month (of 497 curated in total). The ranking below is by low day-to-day swing, not by which is coldest.

September coolcation options on the ten-year record: 48 of 295 curated destinations with ten-year daily records sit at or below 18°C mean daily high (of 497 curated in total; the remainder do not yet have a full ten-year series for September). The list below ranks them by day-to-day steadiness, not raw temperature.

The coldest reading in the dataset for September is Svalbard at 3°. The warmest still inside the cool band is Buenos Aires at 18°. Pack layers, not a coat.

Coolcation is defined here as mean daily high at or below 18°C. That threshold is a firm number, chosen for room-temperature comfort with a light layer. Nothing on this page describes forecasts. The averages are climate.

Curated by Hugo · Updated July 2026
Mirror reflections on the Salar de Uyuni salt flats
Salar de Uyuni, Bolivia
Karla Robinson / Unsplash License
Icebergs drifting through Jokulsarlon glacier lagoon
Jokulsarlon, Iceland
rolf gelpke / Unsplash License
The Ha'penny Bridge over the River Liffey in Dublin
Ha'penny Bridge, Dublin
Gregory DALLEAU / Unsplash License
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Displaying historical averages for the month of September.

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Top 10 destinations in September

  1. 1.Salar de Uyuni, Bolivia

    17°

    Averages 17° in September with swings barely 2° either side of 17° and 0 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  2. 2.Lake Titicaca, Peru

    18°

    Averages 18° in September with swings barely 2° either side of 18° and 6 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  3. 3.Colca Canyon, Peru

    16°

    Averages 16° in September with swings barely 2° either side of 16° and 8 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  4. 4.Jökulsárlón Glacier Lagoon, Iceland

    11°

    Averages 11° in September with swings barely 2° either side of 11° and 16 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  5. 5.La Paz, Bolivia

    16°

    Averages 16° in September with a 6° day-to-day spread around 16° and 7 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  6. 6.Dublin, Ireland

    17°

    Averages 17° in September with a 6° day-to-day spread around 17° and 10 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  7. 7.Margaret River, Australia

    17°

    Averages 17° in September with a 6° day-to-day spread around 17° and 11 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  8. 8.Puerto Varas, Chile

    13°

    Averages 13° in September with a 6° day-to-day spread around 13° and 13 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  9. 9.Ketchikan, United States

    15°

    Averages 15° in September with a 6° day-to-day spread around 15° and 17 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

  10. 10.Anchorage, United States

    14°

    Averages 14° in September with a 7° day-to-day spread around 14° and 13 rain days on the ten-year record. Cool without being wintry. Layers, not a coat.

Average temperatures by destination

Showing 50 of 80 destinations

DestinationCountryAvg high
SvalbardSvalbard and Jan Mayen3°
IlulissatGreenland4°
LongyearbyenNorway5°
IqaluitCanada6°
NuukGreenland7°
UshuaiaArgentina8°
QaqortoqGreenland9°
Abisko National ParkSweden10°
High TatrasSlovakia11°
Jökulsárlón Glacier LagoonIceland11°
San Carlos de BarilocheArgentina11°
Kanas LakeChina12°
TromsøNorway12°
Bran CastleRomania13°
ChurchillCanada13°
FairbanksUnited States13°
Puerto VarasChile13°
QueenstownNew Zealand13°
AnchorageUnited States14°
Valley of Geysers, KamchatkaRussia14°
HobartAustralia15°
KetchikanUnited States15°
Kizhi IslandRussia15°
Lake BaikalRussia15°
Twelve ApostlesAustralia15°
BergenNorway16°
Colca CanyonPeru16°
La PazBolivia16°
Lake DistrictUnited Kingdom16°
Mount Everest North Base CampChina16°
TadoussacCanada16°
DublinIreland17°
KazanRussia17°
Margaret RiverAustralia17°
MelbourneAustralia17°
MoscowRussia17°
Punta del EsteUruguay17°
Salar de UyuniBolivia17°
StockholmSweden17°
Yellowstone National ParkUnited States17°
AalborgDenmark18°
AstanaKazakhstan18°
BamiyanAfghanistan18°
Buenos AiresArgentina18°
JasperCanada18°
Jiuzhaigou ValleyChina18°
Lake TiticacaPeru18°
Mount PaektuNorth Korea18°
Neuschwanstein CastleGermany18°
VilniusLithuania18°

Readings come from the last ten years of daily weather data, so they reflect the climate as it is now, not as it was decades ago. Data: Visual Crossing global historical archive. How we compute this

Frequently asked

Where is reliably cool in September?
The driest 12-18°C cool-comfort picks in September, all with a wider day-to-day spread, are: Salar de Uyuni (17°C, about 0 rain days, a 5° spread); Bamiyan (18°C, about 1 rain day, a 9° spread); Kazan (17°C, about 3 rain days, a 14° spread); Buenos Aires (18°C, about 5 rain days, an 8° spread).
What counts as a coolcation in September?
On this site, a coolcation is anywhere with a mean daily high at or below 18°C. In September that filters 48 of 295 curated destinations with a ten-year record. The warmest in-band pick is Buenos Aires at 18°; the steadiest day-to-day is Salar de Uyuni with a 5° spread.
Is September the right month for a coolcation?
It depends on where you go. In September the ten-year record puts 48 curated destinations at or below 18°C mean daily high. If that count is small, the northern hemisphere is warming and southern-hemisphere hill stations or high-latitude coasts do most of the work. If it is large, the reverse.

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