Eyvān weather in May

In May, Eyvān sees average daytime highs of 27°C and overnight lows near 14°C, with 19 mm of rain across 3.7 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 24°C in the first days to 31°C by the end. The sky is clear or mostly clear about 69% 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 h 06 min by month's end. Set against the rest of the year, May is Eyvān's 6th-clearest and 4th-windiest month. For the whole year in context, see Eyvān's year-round climate.

Daytime high
27°
5th warmest
Overnight low
14°
8th coldest
Rainfall
19 mm
3.7 wet days
Daylight
13 h 48 min
5:28 AM – 7:14 PM
Cloud cover
30%
6th clearest
Wind
9 km/h
4th windiest
Solar energy
7.41 kWh/m²
Travel score
7.4
out of 10

Eyvān is city in Ilam Province, Iran.

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 24°C in the first days to 31°C by the end.

A typical May day in Eyvān reaches about 27°C in the afternoon and slips back to 14°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 32°C. Set against its neighbours, May runs about 7°C warmer than April and about 6°C cooler than June.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12412
22412
32412
42412
52512
62513
72513
82513
92613
102613
112613
122614
132714
142714
152714
162714
172814
182815
192815
202915
212915
222915
232915
243016
253016
263016
273016
283116
293116
303117
313117

How May really feels in Eyvān

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.

Eyvān 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 / -0°9410.13.8102.0
Feb11° / 9010.32.510.72.7
Mar15° / 9510.40.911.74.8
Apr21° / 628.6012.86.9
May27° / 14°193.7013.77.4
Jun34° / 19°10.2014.24.3
Jul37° / 22°00.10142.2
Aug37° / 21°00.1013.32.2
Sep33° / 17°10.3012.25.1
Oct26° / 12°283.6011.18.0
Nov17° / 747.70.110.25.8
Dec12° / 818.81.39.83.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 17%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17426
27426
37426
47525
57525
67525
77723
87723
97921
107921
118119
128119
138317
148317
158416
168515
178614
188713
198713
208713
218713
228812
238812
248812
258812
268812
278812
289010
299010
309010
319010

Chance of precipitation in May

Any precipitation

Eyvān gets around 19 mm of rain over 3.7 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 12% and peaks near 25% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
125
224
323
422
522
620
719
818
917
1016
1115
1214
1313
1412
1511
1610
1710
189
198
208
217
227
236
246
256
265
275
285
294
304
313

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
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
261000
271000
281000
291000
301000
311000

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 min at the start of May to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:42 AM to 5:20 AM, and sunset from 7:02 PM to 7:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:427:02
213.45:417:03
313.45:407:03
413.45:397:04
513.55:387:05
613.55:377:06
713.55:367:07
813.55:357:07
913.65:347:08
1013.65:337:09
1113.65:327:10
1213.65:327:10
1313.75:317:11
1413.75:307:12
1513.75:297:13
1613.85:287:14
1713.85:287:14
1813.85:277:15
1913.85:267:16
2013.85:267:16
2113.95:257:17
2213.95:257:18
2313.95:247:19
2413.95:237:19
2514.05:237:20
2614.05:227:21
2714.05:227:21
2814.05:217:22
2914.05:217:23
3014.05:217:23
3114.15:207:24

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 8.03 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
27.0Intense
37.0Intense
47.0Intense
57.0Intense
67.1Intense
77.1Intense
87.2Intense
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 Eyvān

In seasonPeak

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

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

Eyvān 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 Eyvān?

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

7.4
Sightseeing
2nd-best month of the year
7.9
Beach & pool
3rd-best month of the year

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

What to pack for Eyvān in May

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

In May, Eyvān sees daytime highs around 27°C and nights near 14°C. Pack light clothes and sun protection. About 4 days see rain.

light clothessun protection

UV index in Eyvān 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 Eyvān peaks around June 15 at about 10 (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 highVery highHighModerateJun 15UV 10Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May10Very high
Jun11Extreme
Jul9Very high
Aug11Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Eyvān 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 Eyvān is worst in May — around 41 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1241 µg/m³Nov 2327 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb31Moderate
Mar37Poor
Apr40Poor
May41Poor
Jun35Moderate
Jul34Moderate
Aug33Moderate
Sep32Moderate
Oct32Moderate
Nov27Moderate
Dec27Moderate
Location & terrain

Where is Eyvān?

Eyvān sits at 33.8°N, 46.3°E, 1,184 m above sea level, in Iran. The nearest listed city is Īlām, 24 km away.

Qaşr-e ShīrīnKhānaqīnRavānsar

Topography around Eyvān

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

Within 3 km, the terrain around Eyvān has large variations in elevation — a maximum elevation change of 701 m around an average of 1,303 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,464 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,728 m.

The land around Eyvān is covered by grassland (43%) and cropland (39%) within 3 km, grassland (63%) and cropland (23%) within 16 km, and grassland (56%) and cropland (23%) within 80 km.

3 km
701 m
16 km
1,464 m
80 km
2,728 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
May weather nearby: Īlām 24 km · Eslāmābād-e Gharb 37 km · Mandalī 70 km · Sarpol-e Z̄ahāb 82 km · Kermanshah 88 km · Qaşr-e Shīrīn 102 km · Khānaqīn 103 km · Ravānsar 104 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 Eyvān (33.8272°, 46.3097°, elevation 1,184 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).