Ad Dilam weather in September

In September, Ad Dilam sees average daytime highs of 41°C and overnight lows near 25°C, with 0 mm of rain across 0 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 43°C in the first days to 39°C by the end. The sky is clear or mostly clear about 96% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Ad Dilam's 1st-clearest and 11th-windiest month. For the whole year in context, see Ad Dilam's year-round climate.

Daytime high
41°
4th warmest
Overnight low
25°
8th coldest
Rainfall
0 mm
0 wet days
Daylight
12 h 06 min
5:42 AM – 5:50 PM
Cloud cover
6%
1st clearest
Wind
10 km/h
11th windiest
Solar energy
6.72 kWh/m²
Travel score
0.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 43°C in the first days to 39°C by the end.

A typical September day in Ad Dilam reaches about 41°C in the afternoon and slips back to 25°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 39°C and 43°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

20°25°30°35°40°45°151015202530
Avg high (°C)Avg low (°C)
14327
24327
34327
44327
54227
64227
74227
84227
94226
104226
114226
124126
134126
144126
154125
164125
174125
184125
194025
204025
214025
224024
234024
244024
253924
263924
273924
283923
293923
303923

How September really feels in Ad Dilam

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
27 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.

Ad Dilam 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
Jan22° / 10°81.710.78.5
Feb24° / 12°71.311.29.1
Mar29° / 16°81.511.87.2
Apr35° / 21°11212.53.5
May40° / 26°10.313.10.4
Jun43° / 28°0013.50.0
Jul44° / 29°0013.30.0
Aug44° / 29°0012.80.0
Sep41° / 25°0012.10.2
Oct35° / 20°10.211.43.2
Nov28° / 15°81.210.87.7
Dec23° / 11°81.510.58.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 96% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 2% of September, with mostly cloudy or overcast conditions the remaining 1%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1982
2982
3982
4982
5982
6982
7991
8982
9982
10982
11982
12982
13982
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991

Chance of precipitation in September

Any precipitation

Ad Dilam gets around 0 mm of rain over 0 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 0% and peaks near 0% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991

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
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 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 42 minutes over September. Sunrise moves from 5:36 AM to 5:47 AM, and sunset from 6:06 PM to 5:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:366:06
212.55:376:05
312.45:376:04
412.45:376:03
512.45:386:02
612.45:386:01
712.45:386:00
812.35:395:58
912.35:395:57
1012.35:395:56
1112.35:405:55
1212.25:405:54
1312.25:415:53
1412.25:415:52
1512.25:415:51
1612.15:425:50
1712.15:425:49
1812.15:425:48
1912.15:435:47
2012.05:435:45
2112.05:435:44
2212.05:445:43
2312.05:445:42
2411.95:445:41
2511.95:455:40
2611.95:455:39
2711.95:455:38
2811.95:465:37
2911.85:465:36
3011.85:475:35

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.72 kWh/m².

For context, solar energy here swings from a low near 4.33 kWh/m² to a high of 7.69 kWh/m² in June across the year — September's 6.72 kWh/m² falls in the middle.

02468151015202530
Solar energy (kWh/m²)Level
17.0Intense
27.0Intense
37.0Intense
47.0Intense
56.9Intense
66.9Intense
76.9Intense
86.9Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.6Intense
206.6Intense
216.6Intense
226.6Intense
236.6Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.4Intense
306.4Intense
Planning a trip in September

Hazard calendar for Ad Dilam

In seasonPeak

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

Ad Dilam sees seasonal dust haze (February–September), heaviest in May.

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

Is September a good time to visit Ad Dilam?

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

0.2
Sightseeing
9th-best month of the year
2.6
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Ad Dilam.

What to pack for Ad Dilam in September

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

In September, Ad Dilam sees daytime highs around 41°C and nights near 25°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Ad Dilam in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ad Dilam peaks around July 20 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 20UV 11Dec 17UV 5
UV index (midday)Level
Jan6High
Feb7Very high
Mar9Very high
Apr7Very high
May10Very high
Jun9Very high
Jul11Extreme
Aug10Extreme
Sep9Very high
Oct9Very high
Nov6High
Dec4Moderate

Air quality in Ad Dilam 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 Ad Dilam is worst in March — around 72 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (October, 38 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorMar 2372 µg/m³Oct 1539 µg/m³
PM2.5 (µg/m³)Level
Jan51Poor
Feb57Unhealthy
Mar72Unhealthy
Apr71Unhealthy
May68Unhealthy
Jun60Unhealthy
Jul59Unhealthy
Aug52Poor
Sep42Poor
Oct38Poor
Nov44Poor
Dec47Poor
Location & terrain

Where is Ad Dilam?

Ad Dilam sits at 24.0°N, 47.2°E, 453 m above sea level, in Saudi Arabia. The nearest listed city is Al Kharj, 25 km away.

RumāḩLayláShaqra

Topography around Ad Dilam

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

Within 3 km, the terrain around Ad Dilam has only modest variations in elevation — a maximum elevation change of 45 m around an average of 451 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 145 m; within 80 km, large variations in elevation — a maximum elevation change of 804 m.

The land around Ad Dilam is covered by bare terrain (64%) within 3 km, bare terrain (83%) within 16 km, and bare terrain (96%) within 80 km.

3 km
45 m
16 km
145 m
80 km
804 m
treesshrubscroplandartificial surfacesbare terrain
September weather nearby: Al Kharj 25 km · Ḥawṭah Banī Tamīm 62 km · Riyadh 89 km · ‘Irqah 95 km · Ad Dir‘īyah 106 km · Rumāḩ 175 km · Laylá 194 km · Shaqra 238 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 Ad Dilam (23.991°, 47.1618°, elevation 453 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. 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).