Isfahan weather in May

In May, Isfahan sees average daytime highs of 29°C and overnight lows near 15°C, with 7 mm of rain across 1.9 wet days and about 13.7 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 32°C by the end. The sky is clear or mostly clear about 61% 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 Isfahan's 10th-clearest and 2nd-windiest month. For the whole year in context, see Isfahan's year-round climate.

Daytime high
29°
5th warmest
Overnight low
15°
8th coldest
Rainfall
7 mm
1.9 wet days
Daylight
13 h 42 min
5:09 AM – 6:50 PM
Cloud cover
36%
10th clearest
Wind
9 km/h
2nd windiest
Solar energy
7.59 kWh/m²
Travel score
6.6
out of 10

Isfahan is city in Isfahan Province, Iran.

Air quality
High
PM2.5 29.9 µg/m³ · 2016
Density
3,133/km²
people per km²

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 27°C in the first days to 32°C by the end.

A typical May day in Isfahan reaches about 29°C in the afternoon and slips back to 15°C overnight — a 14°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 6°C warmer than April and about 6°C cooler than June.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12613
22713
32713
42713
52713
62713
72714
82814
92814
102814
112814
122814
132914
142915
152915
162915
173015
183015
193015
203016
213016
223116
233116
243116
253116
263116
273217
283217
293217
303217
313317

How May really feels in Isfahan

Once humidity and wind are folded in, May averages 3 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
3
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.

Isfahan weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / -2°153.31.710.12.6
Feb13° / 122.70.410.84.7
Mar18° / 153.5011.87.1
Apr24° / 10°103012.88.1
May29° / 15°71.9013.76.6
Jun35° / 19°10.3014.13.4
Jul38° / 22°00013.91.7
Aug36° / 20°00013.22.6
Sep32° / 15°00.1012.25.3
Oct25° / 10°30.7011.28.7
Nov17° / 152.50.210.36.5
Dec11° / -0°1230.59.93.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 20%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26733
36832
46832
57030
67030
77228
87228
97426
107525
117624
127723
137822
147921
158020
168119
178218
188317
198416
208515
218515
228614
238713
248713
258812
268911
278911
288911
29919
30919
31928

Chance of precipitation in May

Any precipitation

Isfahan gets around 7 mm of rain over 1.9 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 6% and peaks near 10% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
110
210
310
49
59
69
79
88
98
108
118
127
137
147
156
166
176
185
195
205
215
224
234
244
254
264
273
283
293
303
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 (%)
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
31100

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 9 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
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 5:22 AM to 5:02 AM, and sunset from 6:39 PM to 7:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:226:39
213.35:216:39
313.35:206:40
413.45:196:41
513.45:186:42
613.45:176:42
713.45:176:43
813.55:166:44
913.55:156:45
1013.55:146:45
1113.55:136:46
1213.65:126:47
1313.65:126:48
1413.65:116:48
1513.65:106:49
1613.75:096:50
1713.75:096:50
1813.75:086:51
1913.75:076:52
2013.85:076:53
2113.85:066:53
2213.85:066:54
2313.85:056:55
2413.85:056:55
2513.95:046:56
2613.95:046:57
2713.95:036:57
2813.95:036:58
2913.95:026:59
3014.05:026:59
3114.05:027:00

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.59 kWh/m².

For context, solar energy here swings from a low near 3.28 kWh/m² to a high of 8.05 kWh/m² in June across the year — May's 7.59 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.2Intense
27.2Intense
37.2Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.4Intense
97.4Intense
107.4Intense
117.5Intense
127.5Intense
137.5Intense
147.6Intense
157.6Intense
167.6Intense
177.6Intense
187.7Intense
197.7Intense
207.7Intense
217.8Intense
227.8Intense
237.8Intense
247.8Intense
257.8Intense
267.9Intense
277.9Intense
287.9Intense
297.9Intense
307.9Intense
318.0Intense
Planning a trip in May

Is May a good time to visit Isfahan?

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

6.6
Sightseeing
4th-best month of the year
8.3
Beach & pool
2nd-best month of the year

May is a reasonable time to visit Isfahan for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Isfahan in May

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

In May, Isfahan sees daytime highs around 29°C and nights near 15°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Isfahan 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 Isfahan peaks around July 16 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 16UV 11Jan 1UV 3
UV index (midday)Level
Jan3Moderate
Feb5High
Mar6High
Apr8Very high
May10Extreme
Jun10Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct7Very high
Nov4Moderate
Dec3Moderate

Air quality in Isfahan 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 Isfahan is worst in April — around 39 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (August, 23 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Isfahan's WHO annual average of 29.9 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 2038 µg/m³Aug 1924 µg/m³
PM2.5 (µg/m³)Level
Jan29Moderate
Feb31Moderate
Mar34Moderate
Apr39Poor
May37Poor
Jun27Moderate
Jul32Moderate
Aug23Moderate
Sep28Moderate
Oct27Moderate
Nov25Moderate
Dec27Moderate
Location & terrain

Where is Isfahan?

Isfahan sits at 32.7°N, 51.7°E, 1,578 m above sea level, in Iran. The nearest listed city is Rehnān, 8.0 km away.

Topography around Isfahan

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

Within 3 km, the terrain around Isfahan has only modest variations in elevation — a maximum elevation change of 38 m around an average of 1,575 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 684 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,808 m.

The land around Isfahan is covered by artificial surfaces (93%) within 3 km, bare terrain (38%), artificial surfaces (35%) and cropland (23%) within 16 km, and bare terrain (85%) within 80 km.

3 km
38 m
16 km
684 m
80 km
1,808 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
May weather nearby: Rehnān 8.0 km · Dorcheh Pīāz 12 km · Khomeynī Shahr 13 km · Khowrzūq 14 km · Abrīsham 14 km · Dowlatābād 16 km · Dastgerd 17 km · Gaz-e Borkhar 18 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 Isfahan (32.6525°, 51.6746°, elevation 1,578 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).