An Nimas weather in September

In September, An Nimas sees average daytime highs of 32°C and overnight lows near 23°C, with 109 mm of rain across 16.1 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 55% of the time in September, and the air most often feels dry.

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 An Nimas's 10th-clearest and 12th-windiest month. For the whole year in context, see An Nimas's year-round climate.

Daytime high
32°
5th warmest
Overnight low
23°
9th coldest
Rainfall
109 mm
16.1 wet days
Daylight
12 h 06 min
6:03 AM – 6:09 PM
Cloud cover
38%
10th clearest
Wind
5 km/h
12th windiest
Solar energy
6.1 kWh/m²
Travel score
3.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in An Nimas reaches about 32°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, September runs on par with August and about 3°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63323
73223
83223
93223
103223
113223
123223
133223
143223
153223
163223
173223
183222
193222
203222
213222
223222
233222
243222
253122
263122
273121
283121
293121
303121

How September really feels in An Nimas

Once humidity and wind are folded in, September averages 19 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
19
heat index over the day's high
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.

An Nimas weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 15°254118.5
Feb25° / 16°172.911.38.7
Mar27° / 18°245.511.97.7
Apr30° / 21°338.312.45.6
May33° / 23°4012.412.93.8
Jun34° / 24°185.113.13.3
Jul33° / 25°205133.9
Aug32° / 24°7112.412.63.7
Sep32° / 23°10916.112.13.6
Oct29° / 19°4310.311.65.8
Nov27° / 17°134.411.18.1
Dec25° / 15°112.710.98.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 30% of September, with mostly cloudy or overcast conditions the remaining 15%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27723
37822
47822
57921
68020
78020
88119
98119
108119
118317
128317
138416
148416
158416
168614
178614
188713
198713
208812
218812
229010
239010
24919
25919
26928
27928
28928
29937
30937

Chance of precipitation in September

Any precipitation

An Nimas gets around 109 mm of rain over 16.1 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 54% and peaks near 55% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
154
254
354
454
554
654
754
854
954
1054
1154
1254
1354
1455
1555
1655
1755
1855
1955
2054
2154
2254
2353
2453
2553
2652
2752
2851
2950
3050

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1102437272
2112537262
3112636242
4122736231
5142736221
6152835211
7172835191
8192934181
9202933171
10222932161
11233031150
12253031140
13263030130
14283029130
15303028120
16313027110
17333026100
1835302590
1938302480
2040302380
2142292270
2244292160
2346282060
2448281950
2550271850
2652271740
2753271640
2856261530
2957261430
3058261420

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 6:00 AM to 6:05 AM, and sunset from 6:23 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:006:23
212.46:006:22
312.36:006:21
412.36:006:20
512.36:016:19
612.36:016:18
712.36:016:17
812.36:016:16
912.26:016:16
1012.26:026:15
1112.26:026:14
1212.26:026:13
1312.26:026:12
1412.16:026:11
1512.16:026:10
1612.16:036:09
1712.16:036:08
1812.16:036:07
1912.16:036:06
2012.06:036:05
2112.06:046:04
2212.06:046:03
2312.06:046:03
2412.06:046:02
2511.96:046:01
2611.96:056:00
2711.96:055:59
2811.96:055:58
2911.96:055:57
3011.86:055:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.1 kWh/m².

For context, solar energy here swings from a low near 4.71 kWh/m² to a high of 7.03 kWh/m² in May across the year — September's 6.1 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
Planning a trip in September

Hazard calendar for An Nimas

In seasonPeak

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

An Nimas sees seasonal dust haze (May–September), heaviest in July.

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

Is September a good time to visit An Nimas?

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

3.6
Sightseeing
11th-best month of the year
5.8
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in An Nimas.

What to pack for An Nimas in September

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

In September, An Nimas sees daytime highs around 32°C and nights near 23°C. Pack light clothes, rain gear and sun protection. About 16 days see rain.

light clothesrain gearsun protection

UV index in An Nimas in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in An Nimas peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 10UV 13Dec 14UV 7
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in An Nimas 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 An Nimas is worst in February — around 58 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyPoorFeb 1658 µg/m³Oct 2149 µg/m³
PM2.5 (µg/m³)Level
Jan57Unhealthy
Feb58Unhealthy
Mar57Unhealthy
Apr57Unhealthy
May55Poor
Jun58Unhealthy
Jul53Poor
Aug56Unhealthy
Sep57Unhealthy
Oct49Poor
Nov51Poor
Dec56Unhealthy
Location & terrain

Where is An Nimas?

An Nimas sits at 19.1°N, 42.1°E, 2,385 m above sea level, in Saudi Arabia. The nearest listed city is Bariq, 31 km away.

Sarāt ‘Abīdah

Topography around An Nimas

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

Within 3 km, the terrain around An Nimas has large variations in elevation — a maximum elevation change of 1,043 m around an average of 2,248 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,206 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,793 m.

The land around An Nimas is covered by shrubs (34%) and cropland (26%) within 3 km, shrubs (41%), bare terrain (30%) and grassland (21%) within 16 km, and bare terrain (79%) within 80 km.

3 km
1,043 m
16 km
2,206 m
80 km
2,793 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Bariq 31 km · Sabt Alalayah 51 km · Baljurashi 99 km · Qal‘at Bīshah 108 km · Abha 111 km · Khamis Mushait 114 km · Al Bahah 118 km · Sarāt ‘Abīdah 159 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 An Nimas (19.1455°, 42.1201°, elevation 2,385 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).