Travel tool

Where's warm in September

In September, 2,249 cities in the atlas have an average daily high of 25 °C or more. 468 of them reach 32 °C or more, and 688 get less than 50 mm of rain in the month. Among them, with a guide on this site: Istanbul, Mumbai, Delhi, Tokyo and Cairo. Averages for the area around each city, not a forecast.

Dry only (under 50 mm of rain)Hot only (32 °C and above)

Part of the world

Sort by

Modelled monthly averages for an area about 50 km across (NASA POWER, 2001–2020), not a weather station's record and not a forecast.

2,249 places

Place	Modelled average high	Rain in the month
IstanbulTürkiye	25 °C	54 mm
MumbaiIndia	29 °C	376 mm
DelhiIndia	33 °C	121 mm
TokyoJapan	27 °C	211 mm
CairoEgypt	35 °C	0 mm
HanoiVietnam	30 °C	223 mm
Hong KongHong Kong	30 °C	161 mm
Rio de JaneiroBrazil	25 °C	69 mm
SingaporeSingapore	29 °C	167 mm
BangkokThailand	30 °C	278 mm
NairobiKenya	28 °C	20 mm
RiyadhSaudi Arabia	40 °C	0 mm
Los AngelesUnited States	29 °C	3 mm
DubaiUnited Arab Emirates	37 °C	2 mm
MadridSpain	27 °C	24 mm
JaipurIndia	34 °C	63 mm
RomeItaly	27 °C	70 mm
Abu DhabiUnited Arab Emirates	37 °C	5 mm
BarcelonaSpain	26 °C	59 mm
KyotoJapan	26 °C	192 mm
Kuala LumpurMalaysia	29 °C	195 mm
Da NangVietnam	30 °C	371 mm
MarrakeshMorocco	32 °C	14 mm
CancúnMexico	30 °C	166 mm
MuscatOman	37 °C	5 mm
ZanzibarTanzania	28 °C	22 mm
DenpasarIndonesia	28 °C	38 mm
AthensGreece	28 °C	29 mm
ColomboSri Lanka	28 °C	162 mm
MiamiUnited States	29 °C	190 mm
DohaQatar	40 °C	0 mm
MaléMaldives	28 °C	185 mm
PhuketThailand	28 °C	352 mm
NevşehirTürkiye	26 °C	15 mm
VictoriaSeychelles	27 °C	108 mm
PetraJordan	30 °C	1 mm
FiraGreece	25 °C	18 mm
ShanghaiChina	28 °C	137 mm
ChongqingChina	29 °C	140 mm
ChengduChina	27 °C	128 mm
BeijingChina	26 °C	64 mm
GuangzhouChina	31 °C	178 mm
ShenzhenChina	30 °C	161 mm
KinshasaDemocratic Republic of the Congo	30 °C	78 mm
LagosNigeria	27 °C	245 mm
Ho Chi Minh CityVietnam	30 °C	190 mm
TianjinChina	27 °C	53 mm
WuhanChina	29 °C	77 mm
LahorePakistan	36 °C	77 mm
Xi'anChina	26 °C	125 mm
São PauloBrazil	26 °C	68 mm
HangzhouChina	28 °C	129 mm
KarachiPakistan	31 °C	21 mm
DhakaBangladesh	30 °C	283 mm
HefeiChina	28 °C	89 mm
JohannesburgSouth Africa	26 °C	16 mm
NanjingChina	28 °C	94 mm
ShenyangChina	25 °C	45 mm
JakartaIndonesia	30 °C	66 mm
BengaluruIndia	28 °C	152 mm

About this tool

How it works

What it does

Lists the cities in our atlas where the average daily high in the month is 25 °C or more, with the month's typical rainfall, and lets you narrow the list to dry or hot places or to one part of the world.

Lists every one of them: first the cities we have guides to, then those with a large airport, then the rest, most populous first. Where we have a guide to a city, its name links to it.

How it calculates

The figures are NASA POWER's climate averages for 2001 to 2020 at each city's location. The average daily high is the month's mean temperature plus half its mean daily range, and the rainfall is the month's total. Warm means an average daily high of 25 °C or more; hot, 32 °C or more; dry, less than 50 mm of rain in the month.

The cities are the atlas's: every capital, every city of 300,000 people or more and every city with an airport with scheduled flights, with names and populations from GeoNames.

What it cannot know

POWER's figures are modelled for a grid cell roughly 50 km across, not measured at a weather station: a cell that takes in sea and desert, or a mountain and a valley, can run hotter or colder than the city itself.

These are long-term averages, not a forecast: any given week can be hotter, colder or wetter.

Warmth is not the whole story: humidity, sea temperature and seasonal storms are not shown here.

Sources

Where the figures come from, and when we last checked each source.

01NASA POWER (Prediction Of Worldwide Energy Resources), Climatology API v2NASA Langley Research Center, POWER Project · Checked 25 September 2026 · Licence: Public (NASA data; no restriction on use, acknowledgement requested)These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.
02GeoNamesGeoNames · Checked 25 September 2026 · Licence: CC BY 4.0Place data © GeoNames (geonames.org), CC BY 4.0.
03WikidataWikimedia Foundation · Checked 25 September 2026 · Licence: CC0 1.0Facts from Wikidata (wikidata.org), CC0.
04Unicode CLDR 48.2.2 (cldr-json)Unicode Consortium · Checked 25 September 2026 · Licence: Unicode License v3Unicode CLDR data, © Unicode, Inc., Unicode License v3.

Questions

Questions about this tool

Is this a weather forecast?

No. It shows twenty-year averages for the month, which say what is typical, not what will happen on your dates.

How is warm decided?

A city is listed when its average daily high for the month, over 2001 to 2020, is 25 °C or more. Hot means 32 °C or more.

Why is a city I know missing?

The atlas covers capitals, cities of 300,000 people or more and cities with an airport with scheduled flights. A city is listed in the months when its average daily high, for the area around it, is 25 °C or more.

Where's warm in September

Place

Modelled average high

Rain in the month

IstanbulTürkiye

25 °C

54 mm

MumbaiIndia

29 °C

376 mm

DelhiIndia

33 °C

121 mm

TokyoJapan

27 °C

211 mm

CairoEgypt

35 °C

0 mm

HanoiVietnam

30 °C

223 mm

Hong KongHong Kong

30 °C

161 mm

Rio de JaneiroBrazil

25 °C

69 mm

SingaporeSingapore

29 °C

167 mm

BangkokThailand

30 °C

278 mm

NairobiKenya

28 °C

20 mm

RiyadhSaudi Arabia

40 °C

0 mm

Los AngelesUnited States

29 °C

3 mm

DubaiUnited Arab Emirates

37 °C

2 mm

MadridSpain

27 °C

24 mm

JaipurIndia

34 °C

63 mm

RomeItaly

27 °C

70 mm

Abu DhabiUnited Arab Emirates

37 °C

5 mm

BarcelonaSpain

26 °C

59 mm

KyotoJapan

26 °C

192 mm

Kuala LumpurMalaysia

29 °C

195 mm

Da NangVietnam

30 °C

371 mm

MarrakeshMorocco

32 °C

14 mm

CancúnMexico

30 °C

166 mm

MuscatOman

37 °C

5 mm

ZanzibarTanzania

28 °C

22 mm

DenpasarIndonesia

28 °C

38 mm

AthensGreece

28 °C

29 mm

ColomboSri Lanka

28 °C

162 mm

MiamiUnited States

29 °C

190 mm

DohaQatar

40 °C

0 mm

MaléMaldives

28 °C

185 mm

PhuketThailand

28 °C

352 mm

NevşehirTürkiye

26 °C

15 mm

VictoriaSeychelles

27 °C

108 mm

PetraJordan

30 °C

1 mm

FiraGreece

25 °C

18 mm

ShanghaiChina

28 °C

137 mm

ChongqingChina

29 °C

140 mm

ChengduChina

27 °C

128 mm

BeijingChina

26 °C

64 mm

GuangzhouChina

31 °C

178 mm

ShenzhenChina

30 °C

161 mm

KinshasaDemocratic Republic of the Congo

30 °C

78 mm

LagosNigeria

27 °C

245 mm

Ho Chi Minh CityVietnam

30 °C

190 mm

TianjinChina

27 °C

53 mm

WuhanChina

29 °C

77 mm

LahorePakistan

36 °C

77 mm

Xi'anChina

26 °C

125 mm

São PauloBrazil

26 °C

68 mm

HangzhouChina

28 °C

129 mm

KarachiPakistan

31 °C

21 mm

DhakaBangladesh

30 °C

283 mm

HefeiChina

28 °C

89 mm

JohannesburgSouth Africa

26 °C

16 mm

NanjingChina

28 °C

94 mm

ShenyangChina

25 °C

45 mm

JakartaIndonesia

30 °C

66 mm

BengaluruIndia

28 °C

152 mm