Al Jumūm weather in September

In September, Al Jumūm sees average daytime highs of 40°C and overnight lows near 28°C, with 4 mm of rain across 1.3 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 40°C through the month. The sky is clear or mostly clear about 89% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Al Jumūm's 7th-clearest and 9th-windiest month. For the whole year in context, see Al Jumūm's year-round climate.

Daytime high
40°
4th warmest
Overnight low
28°
9th coldest
Rainfall
4 mm
1.3 wet days
Daylight
12 h 06 min
6:12 AM – 6:19 PM
Cloud cover
20%
7th clearest
Wind
10 km/h
9th windiest
Solar energy
6.28 kWh/m²
Travel score
0.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 40°C through the month.

A typical September day in Al Jumūm reaches about 40°C in the afternoon and slips back to 28°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 38°C and 43°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

20°25°30°35°40°45°151015202530
Avg high (°C)Avg low (°C)
14129
24129
34129
44128
54128
64128
74128
84128
94128
104128
114128
124128
134128
144128
154128
164128
174128
184127
194127
204027
214027
224027
234027
244027
254027
264027
274027
284027
294026
304026

How September really feels in Al Jumūm

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
30 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Al Jumūm weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 18°423.710.87.0
Feb31° / 19°4111.36.2
Mar34° / 21°91.311.84.2
Apr37° / 24°12212.51.9
May40° / 27°62.2130.2
Jun42° / 28°10.313.30.0
Jul41° / 29°00.113.20.0
Aug41° / 29°20.712.70.0
Sep40° / 28°41.312.10.0
Oct38° / 25°62.611.51.3
Nov34° / 22°202.7114.2
Dec30° / 19°242.910.76.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 89% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 3%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1955
2955
3955
4955
5955
6964
7964
8973
9973
10973
11973
12973
13973
14973
15982
16991
17991
18991
19991
20991
21991
22982
23982
24982
25982
26982
27982
28982
29982
30982

Chance of precipitation in September

Any precipitation

Al Jumūm gets around 4 mm of rain over 1.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 5% and peaks near 9% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
33
43
53
63
73
83
93
103
114
124
134
144
154
164
175
185
195
205
215
226
236
246
257
267
278
288
298
309

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 69% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
16101423388
26101423388
36101424388
46101325388
5791325388
6791326377
7791327367
8791328357
9791329356
108101429336
118101430336
127101431325
137101432325
147101532314
157101533314
167101533314
176101634313
186101634303
196101635303
20691735303
21591736303
22591736303
23591737302
24591837292
25581837292
26581838292
27581838292
28581938282
29581939282
30581939272

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over September. Sunrise moves from 6:08 AM to 6:16 AM, and sunset from 6:34 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:086:34
212.46:086:33
312.46:086:32
412.46:096:31
512.46:096:30
612.36:096:29
712.36:096:28
812.36:106:27
912.36:106:26
1012.26:106:25
1112.26:116:24
1212.26:116:23
1312.26:116:22
1412.26:116:21
1512.16:126:20
1612.16:126:19
1712.16:126:18
1812.16:126:17
1912.16:136:16
2012.06:136:15
2112.06:136:14
2212.06:136:13
2312.06:146:12
2412.06:146:11
2511.96:146:10
2611.96:156:09
2711.96:156:08
2811.96:156:07
2911.86:156:06
3011.86:166:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.28 kWh/m².

For context, solar energy here swings from a low near 4.34 kWh/m² to a high of 7.41 kWh/m² in May across the year — September's 6.28 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Al Jumūm

In seasonPeak

In September, Al Jumūm sits inside its dust season. The full year is below, with each hazard's peak months called out.

Al Jumūm sees seasonal dust haze (April–September), heaviest in June.

Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Al Jumūm?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0
Sightseeing
9th-best month of the year
2.8
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Al Jumūm.

What to pack for Al Jumūm in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Al Jumūm sees daytime highs around 40°C and nights near 28°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Al Jumūm in September

The nearest coast averages about 31°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 59 km away) is warmest in August at about 31°C and coldest in February near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar26Warm
Apr27Warm
May28Tropical
Jun29Tropical
Jul30Tropical
Aug31Tropical
Sep31Tropical
Oct31Tropical
Nov30Tropical
Dec28Warm

UV index in Al Jumūm in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Al Jumūm peaks around April 16 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highVery highHighModerateApr 16UV 11Dec 15UV 4
UV index (midday)Level
Jan7High
Feb8Very high
Mar11Extreme
Apr11Extreme
May11Extreme
Jun10Extreme
Jul11Extreme
Aug9Very high
Sep10Extreme
Oct9Very high
Nov6High
Dec4Moderate

Air quality in Al Jumūm in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Al Jumūm is worst in March — around 56 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorMar 2355 µg/m³Nov 1336 µg/m³
PM2.5 (µg/m³)Level
Jan46Poor
Feb49Poor
Mar56Unhealthy
Apr55Unhealthy
May48Poor
Jun47Poor
Jul39Poor
Aug42Poor
Sep44Poor
Oct40Poor
Nov35Moderate
Dec45Poor
Location & terrain

Where is Al Jumūm?

Al Jumūm sits at 21.6°N, 39.7°E, 208 m above sea level, in Saudi Arabia. The nearest listed city is Mecca, 25 km away.

RābighAl Līth

Topography around Al Jumūm

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Al Jumūm.

Within 3 km, the terrain around Al Jumūm has only modest variations in elevation — a maximum elevation change of 182 m around an average of 212 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 619 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,588 m.

The land around Al Jumūm is covered by bare terrain (73%) and artificial surfaces (23%) within 3 km, bare terrain (94%) within 16 km, and bare terrain (84%) within 80 km.

3 km
182 m
16 km
619 m
80 km
2,588 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Mecca 25 km · Jeddah 55 km · Khulayş 71 km · Ta'if 84 km · Ash Shafā 89 km · Thuwal 95 km · Rābigh 148 km · Al Līth 174 km

Saudi Arabia travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type G
230 V · 60 Hz
Prices
≈ 47% of US
price level, 2025
GDP per capita
$34,537
2025
Happiness
6.8 / 10
World Happiness, 2025
Homicide rate
0.9
per 100k, 2019
Road deaths
35.9
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 404

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Al Jumūm (21.6195°, 39.6966°, elevation 208 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).