Rāmsar weather in May

In May, Rāmsar sees average daytime highs of 20°C and overnight lows near 17°C, with 47 mm of rain across 8.8 wet days and about 13.9 hours of daylight. It is the 6th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 22°C by the end. The sky is clear or mostly clear about 41% of the time in May, and the air most often feels comfortable.

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 Rāmsar's 5th-clearest and 9th-windiest month. For the whole year in context, see Rāmsar's year-round climate.

Daytime high
20°
6th warmest
Overnight low
17°
7th coldest
Rainfall
47 mm
8.8 wet days
Daylight
14 hours
5:05 AM – 7:03 PM
Cloud cover
49%
5th clearest
Wind
10 km/h
9th windiest
Solar energy
5.72 kWh/m²
Travel score
6.6
out of 10

Rāmsar is City in Mazandaran province, Iran.

Founded
1943

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 18°C in the first days to 22°C by the end.

A typical May day in Rāmsar reaches about 20°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 23°C. Set against its neighbours, May runs about 4°C warmer than April and about 4°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11715
21715
31815
41815
51815
61816
71816
81816
91916
101916
111917
121917
131917
141917
152017
162018
172018
182018
192018
202018
212118
222119
232119
242119
252119
262119
272219
282220
292220
302220
312220

Rāmsar weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan11° / 1631719.82.3
Feb10° / 13014.51.710.62.1
Mar12° / 10514.50.311.72.8
Apr15° / 13°7511.8012.94.5
May20° / 17°478.8013.96.6
Jun24° / 22°436.3014.58.0
Jul26° / 24°436.5014.37.8
Aug27° / 25°527.2013.47.5
Sep24° / 22°15012.5012.36.8
Oct21° / 19°24615.70115.8
Nov17° / 14°24317.20.2104.3
Dec13° / 11°18416.60.39.53.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 22% of May, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
34951
45149
55248
65347
75347
85446
95545
105644
115644
125743
135842
145941
156139
166238
176337
186535
196634
206733
216931
227030
237129
247129
257327
267426
277426
287525
297525
307624
317624

Chance of precipitation in May

Any precipitation

Rāmsar gets around 47 mm of rain over 8.8 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 30% and peaks near 37% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
336
435
535
634
734
833
933
1033
1133
1232
1332
1432
1531
1631
1730
1830
1929
2028
2128
2227
2326
2425
2524
2624
2723
2823
2923
3022
3122

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
141491000
237511200
334521400
432511610
529521810
626532010
724512320
821522520
919502830
1018493030
1116473340
1214463550
1313443760
1412423970
1510404190
1693842100
1783643120
1883444140
1973245160
2063045180
2152846210
2252646231
2342445251
2442345271
2532144302
2631943322
2721843343
2821742364
2921641384
3021440395
3111339406

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 10 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

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 5:20 AM to 4:55 AM, and sunset from 6:49 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:206:49
213.55:196:50
313.65:176:51
413.65:166:52
513.65:156:53
613.75:146:54
713.75:136:55
813.75:126:56
913.85:116:57
1013.85:106:57
1113.85:096:58
1213.95:086:59
1313.95:077:00
1413.95:067:01
1513.95:057:02
1614.05:057:03
1714.05:047:04
1814.05:037:04
1914.05:027:05
2014.15:027:06
2114.15:017:07
2214.15:007:08
2314.14:597:08
2414.24:597:09
2514.24:587:10
2614.24:587:11
2714.24:577:12
2814.34:577:12
2914.34:567:13
3014.34:567:14
3114.34:557:14

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.72 kWh/m².

For context, solar energy here swings from a low near 1.82 kWh/m² to a high of 5.94 kWh/m² in June across the year — May's 5.72 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.6Bright
135.6Bright
145.6Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
276.0Bright
286.0Bright
296.0Bright
306.0Bright
316.0Intense
Planning a trip in May

Hazard calendar for Rāmsar

In seasonPeak

None of Rāmsar's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Rāmsar's rainy season runs September–February, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Rāmsar?

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

6.6
Sightseeing
5th-best month of the year
3.3
Beach & pool
6th-best month of the year

May is a reasonable time to visit Rāmsar for sightseeing.

What to pack for Rāmsar in May

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

In May, Rāmsar sees daytime highs around 20°C and nights near 17°C. Worth packing: rain gear and sun protection. About 9 days see rain.

rain gearsun protection

Sea temperature near Rāmsar in May

The nearest coast averages about 19°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 21 km away) is warmest in August at about 28°C and coldest in February near 11°C.

It's comfortable for a long swim from May 22 to Nov 5 — about 5.5 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar11Bracing
Apr14Bracing
May19Cool
Jun24Warm
Jul27Warm
Aug28Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec15Bracing

UV index in Rāmsar in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rāmsar peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 17UV 9Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May9Very high
Jun8Very high
Jul9Very high
Aug9Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec3Moderate

Air quality in Rāmsar 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 Rāmsar is worst in February — around 50 µg/m³ PM2.5 (poor), about 3.1× the cleanest month (July, 16 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorFeb 1149 µg/m³Jul 1817 µg/m³
PM2.5 (µg/m³)Level
Jan48Poor
Feb50Poor
Mar45Poor
Apr40Poor
May33Moderate
Jun21Moderate
Jul16Moderate
Aug20Moderate
Sep25Moderate
Oct30Moderate
Nov37Poor
Dec45Poor
Location & terrain

Where is Rāmsar?

Rāmsar sits at 36.9°N, 50.6°E, -21 m above sea level, in Iran. The nearest listed city is Katālem va Sādāt Shahr, 5.0 km away.

Topography around Rāmsar

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

Within 3 km, the terrain around Rāmsar has significant variations in elevation — a maximum elevation change of 538 m around an average of 65 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,548 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,754 m.

The land around Rāmsar is covered by trees (58%) and artificial surfaces (20%) within 3 km, trees (49%) and water (43%) within 16 km, and water (44%), grassland (28%) and trees (21%) within 80 km.

3 km
538 m
16 km
2,548 m
80 km
4,754 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Katālem va Sādāt Shahr 5.0 km · Tonekābon 23 km · Rūdsar 40 km · Amlash 45 km · Langarūd 54 km · Lāhījān 65 km · Āstāneh-ye Ashrafīyeh 73 km · Sīāhkal 74 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 Rāmsar (36.918°, 50.648°, elevation -21 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).