Sīmīn Shahr weather in May

In May, Sīmīn Shahr sees average daytime highs of 26°C and overnight lows near 18°C, with 28 mm of rain across 4.7 wet days and about 14 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 29°C by the end. The sky is clear or mostly clear about 51% of the time in May, and the air most often feels humid.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 18 min by month's end. Set against the rest of the year, May is Sīmīn Shahr's 6th-clearest and 6th-windiest month. For the whole year in context, see Sīmīn Shahr's year-round climate.

Daytime high
26°
5th warmest
Overnight low
18°
8th coldest
Rainfall
28 mm
4.7 wet days
Daylight
14 hours
4:50 AM – 6:49 PM
Cloud cover
43%
6th clearest
Wind
8 km/h
6th windiest
Solar energy
6.02 kWh/m²
Travel score
7.5
out of 10

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 29°C by the end.

A typical May day in Sīmīn Shahr reaches about 26°C in the afternoon and slips back to 18°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 32°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°C cooler than June.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12416
22416
32416
42416
52417
62517
72517
82517
92517
102518
112518
122618
132618
142618
152618
162618
172719
182719
192719
202719
212719
222819
232820
242820
252820
262820
272820
282920
292921
302921
312921

How May really feels in Sīmīn Shahr

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.

Sīmīn Shahr weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan13° / 618.70.29.73.7
Feb13° / 658.90.810.64.0
Mar17° / 669.6011.75.5
Apr21° / 14°457.2012.97.1
May26° / 18°284.70147.5
Jun30° / 23°163.2014.56.0
Jul32° / 25°184.5014.34.7
Aug33° / 26°153.4013.44.4
Sep30° / 22°345.2012.35.9
Oct25° / 17°545.50117.9
Nov19° / 11°748.40.2106.4
Dec14° / 547.90.29.54.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35545
45545
55644
65743
75842
85941
95941
106040
116238
126238
136337
146436
156535
166535
176733
186832
196931
207129
217228
227327
237525
247525
257624
267822
277822
287921
297921
307921
318119

Chance of precipitation in May

Any precipitation

Sīmīn Shahr gets around 28 mm of rain over 4.7 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 16% and peaks near 23% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
123
222
322
421
520
619
718
818
917
1017
1116
1216
1316
1416
1515
1615
1715
1815
1915
2015
2114
2214
2314
2413
2513
2613
2712
2812
2912
3012
3111

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
128402840
226403040
324393250
422393460
520383670
618373880
716364090
8143541100
9133343110
10123244120
11113145130
12103046140
13102847150
1492748160
1582649160
1682550180
1772450190
1872350201
1962250211
2062150221
2162050241
2251949252
2351848272
2441748292
2541647313
2641545333
2731444354
2831343365
2931242386
3021140406
3121139417

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
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 30 min at the start of May to 14 h 18 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 5:05 AM to 4:41 AM, and sunset from 6:35 PM to 7:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:056:35
213.55:046:36
313.65:036:37
413.65:026:38
513.65:016:39
613.75:006:40
713.74:596:41
813.74:586:42
913.84:576:42
1013.84:566:43
1113.84:556:44
1213.94:546:45
1313.94:536:46
1413.94:526:47
1513.94:516:48
1614.04:506:49
1714.04:496:49
1814.04:486:50
1914.14:486:51
2014.14:476:52
2114.14:466:53
2214.14:466:54
2314.24:456:54
2414.24:446:55
2514.24:446:56
2614.24:436:57
2714.24:436:57
2814.34:426:58
2914.34:426:59
3014.34:417:00
3114.34:417:00

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.02 kWh/m².

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 6.51 kWh/m² in June across the year — May's 6.02 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.6Bright
35.6Bright
45.6Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.9Bright
145.9Bright
155.9Bright
166.0Bright
176.0Bright
186.0Intense
196.1Intense
206.1Intense
216.2Intense
226.2Intense
236.2Intense
246.3Intense
256.3Intense
266.3Intense
276.4Intense
286.4Intense
296.4Intense
306.5Intense
316.5Intense
Planning a trip in May

Is May a good time to visit Sīmīn Shahr?

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

7.5
Sightseeing
2nd-best month of the year
7.5
Beach & pool
5th-best month of the year

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

What to pack for Sīmīn Shahr in May

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

In May, Sīmīn Shahr sees daytime highs around 26°C and nights near 18°C. Pack sun protection. Worth having: light clothes. About 5 days see rain.

sun protectionlight clothes

Sea temperature near Sīmīn Shahr in May

The nearest coast averages about 21°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 34 km away) is warmest in August at about 29°C and coldest in February near 11°C.

It's comfortable for a long swim from May 13 to Nov 6 — about 5.9 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar12Bracing
Apr16Cool
May21Refreshing
Jun25Warm
Jul28Warm
Aug29Tropical
Sep27Warm
Oct23Refreshing
Nov19Cool
Dec15Bracing

UV index in Sīmīn Shahr in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Sīmīn Shahr peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 18UV 10Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May7Very high
Jun8Very high
Jul10Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Moderate

Air quality in Sīmīn 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 Sīmīn Shahr is worst in September — around 29 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 2029 µg/m³Jul 1519 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb23Moderate
Mar25Moderate
Apr25Moderate
May22Moderate
Jun21Moderate
Jul19Moderate
Aug22Moderate
Sep29Moderate
Oct27Moderate
Nov25Moderate
Dec23Moderate
Location & terrain

Where is Sīmīn Shahr?

Sīmīn Shahr sits at 37.0°N, 54.2°E, -18 m above sea level, in Iran. The nearest listed city is Gomīshān, 15 km away.

Topography around Sīmīn Shahr

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

Within 3 km, the terrain around Sīmīn Shahr has only modest variations in elevation — a maximum elevation change of 6 m around an average of -21 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 21 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,905 m.

The land around Sīmīn Shahr is covered by cropland (76%) within 3 km, cropland (87%) within 16 km, and bare terrain (24%), cropland (22%) and water (21%) within 80 km.

3 km
6 m
16 km
21 m
80 km
3,905 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Gomīshān 15 km · Bandar-e Torkaman 19 km · Āq Qalā 20 km · Kord Kūy 27 km · Gorgān 27 km · Bandar-e Gaz 37 km · Fāẕelābād 48 km · Galūgāh 49 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 Sīmīn Shahr (37.0142°, 54.23°, elevation -18 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).