Arāk weather in September

In September, Arāk sees average daytime highs of 28°C and overnight lows near 13°C, with 1 mm of rain across 0.4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 26°C by the end. The sky is clear or mostly clear about 89% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Arāk's 1st-clearest and 9th-windiest month. For the whole year in context, see Arāk's year-round climate.

Daytime high
28°
4th warmest
Overnight low
13°
9th coldest
Rainfall
1 mm
0.4 wet days
Daylight
12 h 12 min
5:59 AM – 6:12 PM
Cloud cover
13%
1st clearest
Wind
8 km/h
9th windiest
Solar energy
6.29 kWh/m²
Travel score
7.9
out of 10

Arāk is city in Markazi Province, Iran.

Air quality
Elevated
PM2.5 18.4 µg/m³ · 2020
Founded
1808

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 31°C in the first days to 26°C by the end.

A typical September day in Arāk reaches about 28°C in the afternoon and slips back to 13°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 31°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
13116
23116
33116
43015
53015
63015
73015
83015
93014
103014
112914
122914
132914
142914
152913
162813
172813
182813
192813
202812
212712
222712
232712
242712
252611
262611
272611
282611
292511
302510

How September really feels in Arāk

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Arāk weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -6°326.55.5100.1
Feb / -4°336.54.510.71.1
Mar12° / 498.22.911.73.5
Apr17° / 4490.312.85.7
May23° / 11°246.4013.77.6
Jun30° / 16°41.1014.26.6
Jul33° / 19°10.40144.4
Aug33° / 18°10.2013.35.0
Sep28° / 13°10.4012.27.9
Oct21° / 143.8011.18.0
Nov13° / 306.1110.24.0
Dec / -3°316.33.89.81.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 89% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 2%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1982
2982
3982
4982
5982
6982
7982
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19982
20973
21973
22973
23973
24973
25973
26964
27964
28964
29964
30946

Chance of precipitation in September

Any precipitation

Arāk gets around 1 mm of rain over 0.4 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 2% and peaks near 4% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
152
162
172
182
192
202
212
222
232
242
253
263
273
283
293
304

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 5:49 AM to 6:10 AM, and sunset from 6:33 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:496:33
212.75:496:32
312.75:506:31
412.65:516:29
512.65:516:28
612.65:526:26
712.55:536:25
812.55:546:23
912.55:546:22
1012.45:556:21
1112.45:566:19
1212.45:566:18
1312.35:576:16
1412.35:586:15
1512.25:596:13
1612.25:596:12
1712.26:006:10
1812.16:016:09
1912.16:016:07
2012.16:026:06
2112.06:036:04
2212.06:046:03
2312.06:046:02
2411.96:056:00
2511.96:065:59
2611.86:075:57
2711.86:075:56
2811.86:085:54
2911.76:095:53
3011.76:105:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.29 kWh/m².

For context, solar energy here swings from a low near 3.01 kWh/m² to a high of 7.91 kWh/m² in June across the year — September's 6.29 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.7Intense
46.7Intense
56.7Intense
66.6Intense
76.6Intense
86.6Intense
96.5Intense
106.5Intense
116.5Intense
126.4Intense
136.4Intense
146.3Intense
156.3Intense
166.3Intense
176.2Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.0Intense
236.0Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.8Bright
295.7Bright
305.7Bright
Planning a trip in September

Is September a good time to visit Arāk?

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

7.9
Sightseeing
2nd-best month of the year
8.9
Beach & pool
1st-best month of the year

September is one of the better times to visit Arāk for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Arāk in September

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

In September, Arāk sees daytime highs around 28°C and nights near 13°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Arāk in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Arāk peaks around July 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 20UV 12Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb5High
Mar6High
Apr7Very high
May10Extreme
Jun10Extreme
Jul12Extreme
Aug11Extreme
Sep8Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Arāk 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 Arāk is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Arāk's WHO annual average of 18.4 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1826 µg/m³Dec 1314 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar22Moderate
Apr26Moderate
May24Moderate
Jun18Moderate
Jul20Moderate
Aug15Moderate
Sep17Moderate
Oct17Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Arāk?

Arāk sits at 34.1°N, 49.7°E, 1,738 m above sea level, in Iran. The nearest listed city is Karahrūd, 6.0 km away.

Topography around Arāk

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

Within 3 km, the terrain around Arāk has only modest variations in elevation — a maximum elevation change of 193 m around an average of 1,743 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 956 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,066 m.

The land around Arāk is covered by artificial surfaces (80%) within 3 km, cropland (37%), bare terrain (29%) and grassland (23%) within 16 km, and cropland (37%), bare terrain (32%) and grassland (29%) within 80 km.

3 km
193 m
16 km
956 m
80 km
2,066 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Karahrūd 6.0 km · Mahājerān 25 km · Shāzand 32 km · Khomeyn 62 km · Maḩallāt 73 km · Tafresh 73 km · Aznā 74 km · Alīgūdarz 77 km

Iran travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / F
220 V · 50 Hz
Prices
≈ 352% of US
price level, 2025
GDP per capita
$3,924
2025
Happiness
5.2 / 10
World Happiness, 2025
Safe drinking water
94%
of population, 2024
Homicide rate
2.4
per 100k, 2014
Road deaths
21.5
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 492
Religion
Muslim 99%Christian 1%Baha'i 0%agnostic 0%

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 Arāk (34.0949°, 49.6981°, elevation 1,738 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).