Darreh Shahr weather in September

In September, Darreh Shahr sees average daytime highs of 34°C and overnight lows near 16°C, with 1 mm of rain across 0.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 37°C in the first days to 31°C by the end. The sky is clear or mostly clear about 97% 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 Darreh Shahr's 2nd-clearest and 5th-windiest month. For the whole year in context, see Darreh Shahr's year-round climate.

Daytime high: 34°; 4th warmest
Overnight low: 16°; 9th coldest
Rainfall: 1 mm; 0.1 wet days
Daylight: 12 h 12 min; 6:09 AM – 6:21 PM
Cloud cover: 5%; 2nd clearest
Wind: 6 km/h; 5th windiest
Solar energy: 6.4 kWh/m²
Travel score: 4.1; out of 10

Darreh Shahr is city in Ilam Province, Iran.

Density: 8,184/km²; people per km²
Founded: 1964

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

← August Darreh Shahr year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 37°C in the first days to 31°C by the end.

A typical September day in Darreh Shahr reaches about 34°C in the afternoon and slips back to 16°C overnight — a 19°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 36°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	37	37	37	36	36	36	36	36	35	35	35	35	35	35	34	34	34	34	34	33	33	33	33	32	32	32	32	32	31	31
Avg low (°C)	18	18	18	18	17	17	17	17	17	16	16	16	16	16	16	15	15	15	15	15	15	15	15	14	14	14	14	14	14	14

	Avg high (°C)	Avg low (°C)
1	37	18
2	37	18
3	37	18
4	36	18
5	36	17
6	36	17
7	36	17
8	36	17
9	35	17
10	35	16
11	35	16
12	35	16
13	35	16
14	35	16
15	34	16
16	34	15
17	34	15
18	34	15
19	34	15
20	33	15
21	33	15
22	33	15
23	33	15
24	32	14
25	32	14
26	32	14
27	32	14
28	32	14
29	31	14
30	31	14

How September really feels in Darreh Shahr

Once humidity and wind are folded in, September averages 25 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Darreh Shahr 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.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	11° / 1°	93	9.6	2.3	10.1	2.6
Feb	13° / 2°	79	9.4	1	10.8	3.6
Mar	17° / 5°	92	8.7	0.1	11.7	5.7
Apr	22° / 10°	68	7.6	0	12.8	7.3
May	29° / 14°	16	3.2	0	13.7	6.6
Jun	36° / 18°	0	0.1	0	14.1	2.9
Jul	39° / 21°	0	0	0	14	0.8
Aug	39° / 20°	0	0	0	13.2	1.0
Sep	34° / 16°	1	0.1	0	12.2	4.1
Oct	27° / 11°	27	3.1	0	11.2	7.7
Nov	18° / 6°	73	7.2	0	10.3	6.3
Dec	13° / 2°	87	8.5	0.6	9.8	3.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 97% of the time in September.

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	100	100	100	100	100	100	100	100	100	99	99	99	99	99	100	100	100	100	100	100	100	99	99	99	99	99	98	97	97	97
Cloudier (%)	0	0	0	0	0	0	0	0	0	1	1	1	1	1	0	0	0	0	0	0	0	1	1	1	1	1	2	3	3	3

	Clearer (%)	Cloudier (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	98	2
28	97	3
29	97	3
30	97	3

Chance of precipitation in September

Any precipitation

Darreh Shahr gets around 1 mm of rain over 0.1 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 2% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	2	2	2

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	1
28	2
29	2
30	2

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	6	calm
11	6	calm
12	6	calm
13	6	calm
14	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	6	calm
20	6	calm
21	6	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm

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 5:59 AM to 6:18 AM, and sunset from 6:42 PM to 6:01 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.7	12.7	12.7	12.6	12.6	12.5	12.5	12.5	12.4	12.4	12.4	12.3	12.3	12.3	12.2	12.2	12.2	12.1	12.1	12.1	12.0	12.0	12.0	11.9	11.9	11.9	11.8	11.8	11.7	11.7
Sunrise (AM)	5:59	5:59	6:00	6:01	6:01	6:02	6:03	6:03	6:04	6:05	6:05	6:06	6:07	6:07	6:08	6:09	6:09	6:10	6:11	6:11	6:12	6:13	6:14	6:14	6:15	6:16	6:16	6:17	6:18	6:18
Sunset (PM)	6:42	6:40	6:39	6:38	6:36	6:35	6:34	6:32	6:31	6:29	6:28	6:27	6:25	6:24	6:22	6:21	6:19	6:18	6:17	6:15	6:14	6:12	6:11	6:09	6:08	6:07	6:05	6:04	6:02	6:01

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.7	5:59	6:42
2	12.7	5:59	6:40
3	12.7	6:00	6:39
4	12.6	6:01	6:38
5	12.6	6:01	6:36
6	12.5	6:02	6:35
7	12.5	6:03	6:34
8	12.5	6:03	6:32
9	12.4	6:04	6:31
10	12.4	6:05	6:29
11	12.4	6:05	6:28
12	12.3	6:06	6:27
13	12.3	6:07	6:25
14	12.3	6:07	6:24
15	12.2	6:08	6:22
16	12.2	6:09	6:21
17	12.2	6:09	6:19
18	12.1	6:10	6:18
19	12.1	6:11	6:17
20	12.1	6:11	6:15
21	12.0	6:12	6:14
22	12.0	6:13	6:12
23	12.0	6:14	6:11
24	11.9	6:14	6:09
25	11.9	6:15	6:08
26	11.9	6:16	6:07
27	11.8	6:16	6:05
28	11.8	6:17	6:04
29	11.7	6:18	6:02
30	11.7	6:18	6:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.4 kWh/m².

For context, solar energy here swings from a low near 2.81 kWh/m² to a high of 8.06 kWh/m² in June across the year — September's 6.4 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	7.0	6.9	6.9	6.9	6.8	6.8	6.8	6.7	6.7	6.6	6.6	6.5	6.5	6.5	6.4	6.4	6.3	6.3	6.3	6.2	6.2	6.1	6.1	6.0	6.0	5.9	5.9	5.8	5.8	5.7
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	7.0	Intense
2	6.9	Intense
3	6.9	Intense
4	6.9	Intense
5	6.8	Intense
6	6.8	Intense
7	6.8	Intense
8	6.7	Intense
9	6.7	Intense
10	6.6	Intense
11	6.6	Intense
12	6.5	Intense
13	6.5	Intense
14	6.5	Intense
15	6.4	Intense
16	6.4	Intense
17	6.3	Intense
18	6.3	Intense
19	6.3	Intense
20	6.2	Intense
21	6.2	Intense
22	6.1	Intense
23	6.1	Intense
24	6.0	Intense
25	6.0	Bright
26	5.9	Bright
27	5.9	Bright
28	5.8	Bright
29	5.8	Bright
30	5.7	Bright

Planning a trip in September

Hazard calendar for Darreh Shahr

In seasonPeak

None of Darreh Shahr's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Darreh Shahr's rainy season runs November–April, when most of the year's rain falls.

Darreh Shahr sees seasonal dust haze (March–May), heaviest in May.

Rainy season

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Darreh Shahr?

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

4.1

Sightseeing

6th-best month of the year

7.7

Beach & pool

3rd-best month of the year

September is a reasonable time to visit Darreh Shahr for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Darreh Shahr in September

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

In September, Darreh Shahr sees daytime highs around 34°C and nights near 16°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Darreh Shahr in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Darreh Shahr peaks around June 17 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 13 at about 3 (moderate).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	3	4	5	7	10	11	10	10	7	6	4	3
Level	Moderate	Moderate	High	High	Very high	Extreme	Very high	Very high	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	4	Moderate
Mar	5	High
Apr	7	High
May	10	Very high
Jun	11	Extreme
Jul	10	Very high
Aug	10	Very high
Sep	7	Very high
Oct	6	High
Nov	4	Moderate
Dec	3	Moderate

Air quality in Darreh Shahr 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 Darreh Shahr is worst in April — around 42 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (November, 26 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	27	32	39	42	41	35	35	33	32	30	26	26
Level	Moderate	Moderate	Poor	Poor	Poor	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	27	Moderate
Feb	32	Moderate
Mar	39	Poor
Apr	42	Poor
May	41	Poor
Jun	35	Poor
Jul	35	Poor
Aug	33	Moderate
Sep	32	Moderate
Oct	30	Moderate
Nov	26	Moderate
Dec	26	Moderate

Location & terrain

Where is Darreh Shahr?

Darreh Shahr sits at 33.1°N, 47.4°E, 667 m above sea level, in Iran. The nearest listed city is Ābdānān, 17 km away.

Topography around Darreh Shahr

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

Within 3 km, the terrain around Darreh Shahr has significant variations in elevation — a maximum elevation change of 318 m around an average of 686 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,666 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,732 m.

The land around Darreh Shahr is covered by cropland (42%) and grassland (39%) within 3 km, grassland (62%) and cropland (22%) within 16 km, and grassland (63%) and bare terrain (21%) within 80 km.

3 km

318 m

cropland 42%

16 km

1,666 m

grassland 62%

80 km

2,732 m

grassland 63%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← August Darreh Shahr year-round climate October →Best places to visit in September

September weather nearby: Ābdānān 17 km · Poldokhtar 31 km · Kūhdasht 48 km · Dehlorān 51 km · Khorramabad 98 km · ‘Alī al Gharbī 100 km · Īlām 104 km · Aleshtar 114 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

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 Darreh Shahr (33.1445°, 47.3799°, elevation 667 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).

	Avg high (°C)	Avg low (°C)
1	37	18
2	37	18
3	37	18
4	36	18
5	36	17
6	36	17
7	36	17
8	36	17
9	35	17
10	35	16
11	35	16
12	35	16
13	35	16
14	35	16
15	34	16
16	34	15
17	34	15
18	34	15
19	34	15
20	33	15
21	33	15
22	33	15
23	33	15
24	32	14
25	32	14
26	32	14
27	32	14
28	32	14
29	31	14
30	31	14

	Clearer (%)	Cloudier (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	98	2
28	97	3
29	97	3
30	97	3

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	1
28	2
29	2
30	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	37	18
2	37	18
3	37	18
4	36	18
5	36	17
6	36	17
7	36	17
8	36	17
9	35	17
10	35	16
11	35	16
12	35	16
13	35	16
14	35	16
15	34	16
16	34	15
17	34	15
18	34	15
19	34	15
20	33	15
21	33	15
22	33	15
23	33	15
24	32	14
25	32	14
26	32	14
27	32	14
28	32	14
29	31	14
30	31	14

	Clearer (%)	Cloudier (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	98	2
28	97	3
29	97	3
30	97	3

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	1
28	2
29	2
30	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	37	18
2	37	18
3	37	18
4	36	18
5	36	17
6	36	17
7	36	17
8	36	17
9	35	17
10	35	16
11	35	16
12	35	16
13	35	16
14	35	16
15	34	16
16	34	15
17	34	15
18	34	15
19	34	15
20	33	15
21	33	15
22	33	15
23	33	15
24	32	14
25	32	14
26	32	14
27	32	14
28	32	14
29	31	14
30	31	14

	Clearer (%)	Cloudier (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	98	2
28	97	3
29	97	3
30	97	3

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	1
28	2
29	2
30	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100