Darreh Shahr weather in May

In May, Darreh Shahr sees average daytime highs of 29°C and overnight lows near 14°C, with 16 mm of rain across 3.2 wet days and about 13.7 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 33°C by the end. The sky is clear or mostly clear about 66% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of May to 14 hours by month's end. Set against the rest of the year, May is Darreh Shahr's 6th-clearest and 2nd-windiest month. For the whole year in context, see Darreh Shahr's year-round climate.

Daytime high
29°
5th warmest
Overnight low
14°
8th coldest
Rainfall
16 mm
3.2 wet days
Daylight
13 h 42 min
5:26 AM – 7:08 PM
Cloud cover
31%
6th clearest
Wind
7 km/h
2nd windiest
Solar energy
7.43 kWh/m²
Travel score
6.6
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.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 26°C in the first days to 33°C by the end.

A typical May day in Darreh Shahr reaches about 29°C in the afternoon and slips back to 14°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 33°C. Set against its neighbours, May runs about 7°C warmer than April and about 7°C cooler than June.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12512
22512
32612
42612
52612
62612
72713
82713
92713
102713
112813
122813
132813
142814
152914
162914
172914
183014
193014
203014
213015
223115
233115
243115
253215
263215
273215
283216
293316
303316
313316

How May really feels in Darreh Shahr

Once humidity and wind are folded in, May averages 5 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
5
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Darreh Shahr weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan11° / 939.62.310.12.6
Feb13° / 799.4110.83.6
Mar17° / 928.70.111.75.7
Apr22° / 10°687.6012.87.3
May29° / 14°163.2013.76.6
Jun36° / 18°00.1014.12.9
Jul39° / 21°000140.8
Aug39° / 20°00013.21.0
Sep34° / 16°10.1012.24.1
Oct27° / 11°273.1011.27.7
Nov18° / 737.2010.36.3
Dec13° / 878.50.69.83.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27129
37129
47129
57228
67228
77228
87426
97426
107525
117723
127723
137921
148020
158119
168218
178317
188416
198416
208614
218614
228713
238812
248812
258812
269010
279010
28919
29919
30928
31937

Chance of precipitation in May

Any precipitation

Darreh Shahr gets around 16 mm of rain over 3.2 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 10% and peaks near 21% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
121
221
321
420
519
619
718
817
916
1015
1114
1213
1312
1411
1510
169
178
188
197
206
215
225
234
244
254
263
273
283
293
302
312

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1982
2982
3982
4982
5982
6982
7982
8982
9982
10982
11982
12982
13982
14982
15982
16982
17982
18982
19982
20982
21982
22982
23982
24982
25982
26982
27982
28982
29982
30982
31982

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 min at the start of May to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:39 AM to 5:18 AM, and sunset from 6:57 PM to 7:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:396:57
213.35:386:57
313.45:376:58
413.45:366:59
513.45:357:00
613.45:347:00
713.55:337:01
813.55:327:02
913.55:317:03
1013.65:307:03
1113.65:297:04
1213.65:297:05
1313.65:287:06
1413.75:277:06
1513.75:267:07
1613.75:267:08
1713.75:257:09
1813.85:247:09
1913.85:247:10
2013.85:237:11
2113.85:227:11
2213.85:227:12
2313.95:217:13
2413.95:217:14
2513.95:207:14
2613.95:207:15
2713.95:197:16
2814.05:197:16
2914.05:187:17
3014.05:187:18
3114.05:187:18

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.43 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 — May's 7.43 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
37.0Intense
47.0Intense
57.0Intense
67.1Intense
77.1Intense
87.1Intense
97.2Intense
107.2Intense
117.3Intense
127.3Intense
137.3Intense
147.4Intense
157.4Intense
167.5Intense
177.5Intense
187.5Intense
197.6Intense
207.6Intense
217.6Intense
227.7Intense
237.7Intense
247.7Intense
257.8Intense
267.8Intense
277.8Intense
287.8Intense
297.8Intense
307.9Intense
317.9Intense
Planning a trip in May

Hazard calendar for Darreh Shahr

In seasonPeak

In May, Darreh Shahr sits inside its dust season. The full year is below, with each hazard's peak months called out.

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 May a good time to visit Darreh Shahr?

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

6.6
Sightseeing
3rd-best month of the year
8.0
Beach & pool
1st-best month of the year

May 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 May

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

In May, Darreh Shahr sees daytime highs around 29°C and nights near 14°C. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

UV index in Darreh Shahr in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 17UV 10Jan 13UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May10Very high
Jun11Extreme
Jul10Very high
Aug10Very high
Sep7Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Darreh Shahr in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 2142 µg/m³Nov 2326 µg/m³
PM2.5 (µg/m³)Level
Jan27Moderate
Feb32Moderate
Mar39Poor
Apr42Poor
May41Poor
Jun35Poor
Jul35Poor
Aug33Moderate
Sep32Moderate
Oct30Moderate
Nov26Moderate
Dec26Moderate
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.

ĪlāmAleshtar

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
16 km
1,666 m
80 km
2,732 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
May 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
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 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).