Īlām weather in May

In May, Īlām sees average daytime highs of 26°C and overnight lows near 12°C, with 21 mm of rain across 4.9 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 23°C in the first days to 29°C by the end. The sky is clear or mostly clear about 67% 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 Īlām's 6th-clearest and 4th-windiest month. For the whole year in context, see Īlām's year-round climate.

Daytime high
26°
5th warmest
Overnight low
12°
8th coldest
Rainfall
21 mm
4.9 wet days
Daylight
13 h 42 min
5:28 AM – 7:13 PM
Cloud cover
31%
6th clearest
Wind
8 km/h
4th windiest
Solar energy
7.41 kWh/m²
Travel score
7.7
out of 10

Īlām is city in Ilam Province, Iran.

Air quality
Elevated
PM2.5 18.7 µg/m³ · 2020

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 23°C in the first days to 29°C by the end.

A typical May day in Īlām reaches about 26°C in the afternoon and slips back to 12°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°C. Set against its neighbours, May runs about 7°C warmer than April and about 7°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12210
22210
32310
42311
52311
62311
72311
82411
92411
102411
112412
122512
132512
142512
152612
162612
172613
182613
192713
202713
212713
222713
232813
242814
252814
262814
272914
282914
292914
302915
313015

How May really feels in Īlām

Once humidity and wind are folded in, May 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

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

Īlām 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
Jan / -1°8910.15.2101.4
Feb10° / -0°8810.73.610.72.2
Mar14° / 9611.11.411.74.2
Apr19° / 679.5012.86.5
May26° / 12°214.9013.77.7
Jun32° / 17°10.3014.25.2
Jul36° / 20°00.10142.9
Aug36° / 19°00013.22.9
Sep31° / 15°10.3012.25.9
Oct24° / 10°304.3011.28.2
Nov16° / 7380.110.35.2
Dec10° / 788.81.89.82.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 67% 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 (%)
17129
27228
37228
47228
57426
67426
77525
87624
97624
107822
117822
127921
138119
148119
158218
168317
178416
188515
198515
208515
218614
228614
238614
248713
258713
268713
278713
288812
298911
308911
318911

Chance of precipitation in May

Any precipitation

Īlām gets around 21 mm of rain over 4.9 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 16% and peaks near 30% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
130
229
328
428
527
625
724
823
922
1021
1119
1218
1317
1416
1515
1614
1713
1812
1911
2011
2110
2210
239
249
258
268
277
286
296
305
315

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

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
301000
311000

Wind in May

Winds average 8 km/h in May.

Across May, 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.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 5:42 AM to 5:20 AM, and sunset from 7:01 PM to 7:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:427:01
213.45:417:02
313.45:407:03
413.45:397:03
513.45:387:04
613.55:377:05
713.55:367:06
813.55:357:07
913.65:347:07
1013.65:337:08
1113.65:327:09
1213.65:327:10
1313.75:317:10
1413.75:307:11
1513.75:297:12
1613.75:287:13
1713.85:287:13
1813.85:277:14
1913.85:267:15
2013.85:267:16
2113.95:257:16
2213.95:247:17
2313.95:247:18
2413.95:237:18
2513.95:237:19
2614.05:227:20
2714.05:227:21
2814.05:217:21
2914.05:217:22
3014.05:217:22
3114.05:207:23

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.41 kWh/m².

For context, solar energy here swings from a low near 2.85 kWh/m² to a high of 8.05 kWh/m² in June across the year — May's 7.41 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
197.5Intense
207.6Intense
217.6Intense
227.6Intense
237.7Intense
247.7Intense
257.7Intense
267.7Intense
277.8Intense
287.8Intense
297.8Intense
307.8Intense
317.8Intense
Planning a trip in May

Hazard calendar for Īlām

In seasonPeak

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

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

Īlām sees seasonal dust haze (April–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 Īlām?

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

7.7
Sightseeing
2nd-best month of the year
7.4
Beach & pool
3rd-best month of the year

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

What to pack for Īlām in May

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

In May, Īlām sees daytime highs around 26°C and nights near 12°C. Pack sun protection. Worth having: light clothes. About 5 days see rain.

sun protectionlight clothes

UV index in Īlām 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 Īlām peaks around June 13 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 12 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 13UV 10Jan 12UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May10Very high
Jun11Extreme
Jul9Very high
Aug10Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Īlām 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 Īlām is worst in May — around 23 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Īlām's WHO annual average of 18.7 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1223 µg/m³Nov 2315 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar21Moderate
Apr22Moderate
May23Moderate
Jun20Moderate
Jul19Moderate
Aug19Moderate
Sep18Moderate
Oct18Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Īlām?

Īlām sits at 33.6°N, 46.4°E, 1,403 m above sea level, in Iran. The nearest listed city is Eyvān, 24 km away.

Darreh ShahrSarpol-e Z̄ahābKūhdashtĀbdānān

Topography around Īlām

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

Within 3 km, the terrain around Īlām has large variations in elevation — a maximum elevation change of 620 m around an average of 1,488 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,803 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,742 m.

The land around Īlām is covered by artificial surfaces (41%) and grassland (38%) within 3 km, grassland (58%) within 16 km, and grassland (55%) and bare terrain (23%) within 80 km.

3 km
620 m
16 km
1,803 m
80 km
2,742 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
May weather nearby: Eyvān 24 km · Eslāmābād-e Gharb 53 km · Mandalī 81 km · Kermanshah 96 km · Darreh Shahr 104 km · Sarpol-e Z̄ahāb 105 km · Kūhdasht 111 km · Ābdānān 117 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 Īlām (33.6374°, 46.4227°, elevation 1,403 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).