Zīr Āb weather in May

In May, Zīr Āb sees average daytime highs of 21°C and overnight lows near 13°C, with 105 mm of rain across 16 wet days and about 13.9 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 23°C by the end. The sky is clear or mostly clear about 22% 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 Zīr Āb's 11th-clearest and 6th-windiest month. For the whole year in context, see Zīr Āb's year-round climate.

Daytime high
21°
5th warmest
Overnight low
13°
8th coldest
Rainfall
105 mm
16 wet days
Daylight
13 h 54 min
4:57 AM – 6:52 PM
Cloud cover
65%
11th clearest
Wind
5 km/h
6th windiest
Solar energy
5.56 kWh/m²
Travel score
5.6
out of 10

Zīr Āb is city in Mazandaran 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 19°C in the first days to 23°C by the end.

A typical May day in Zīr Āb reaches about 21°C in the afternoon and slips back to 13°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 26°C. Set against its neighbours, May runs about 4°C warmer than April and about 4°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
11911
21911
31911
41911
52011
62012
72012
82012
92012
102012
112112
122113
132113
142113
152113
162113
172113
182213
192214
202214
212214
222214
232214
242314
252314
262315
272315
282315
292315
302315
312415

How May really feels in Zīr Āb

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.

Zīr Āb weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°719.769.82.0
Feb10° / -0°79116.310.62.2
Mar13° / 10014.34.511.73.4
Apr17° / 9815.10.912.94.8
May21° / 13°10516013.95.6
Jun25° / 17°7511.8014.46.5
Jul27° / 19°7312.8014.26.2
Aug27° / 19°8312.3013.46.2
Sep24° / 16°15314012.26.2
Oct20° / 11°12412.6011.16.1
Nov15° / 10511.91.810.14.4
Dec11° / 699.349.62.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 60%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23466
33466
43466
53466
63466
73565
83565
93664
103664
113763
123763
133862
143862
154060
163961
174060
184060
194258
204258
214456
224456
234555
244555
254555
264654
274654
284753
294852
304753
314753

Chance of precipitation in May

Any precipitation

Zīr Āb gets around 105 mm of rain over 16 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 52% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
156
256
356
456
556
656
756
856
956
1056
1156
1256
1356
1456
1555
1655
1755
1854
1953
2052
2151
2250
2349
2449
2548
2647
2746
2845
2945
3044
3143

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 40% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1692830
2663040
3633250
4613450
5583660
6553870
7533980
84941100
94742110
104543120
114244130
124045141
133846161
143646171
153447181
163247201
173047221
182947231
192747251
202546272
212345292
222244322
232043343
241842363
251740394
261539415
271437436
281235457
291134469
3010324810
319304912

Wind in May

Winds average 5 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

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 5:12 AM to 4:48 AM, and sunset from 6:39 PM to 7:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:126:39
213.55:116:40
313.55:096:41
413.65:086:42
513.65:076:42
613.65:066:43
713.65:056:44
813.75:046:45
913.75:036:46
1013.75:026:47
1113.85:016:48
1213.85:006:48
1313.84:596:49
1413.94:596:50
1513.94:586:51
1613.94:576:52
1713.94:566:53
1814.04:556:53
1914.04:556:54
2014.04:546:55
2114.04:536:56
2214.14:536:57
2314.14:526:57
2414.14:516:58
2514.14:516:59
2614.24:507:00
2714.24:507:00
2814.24:497:01
2914.24:497:02
3014.24:487:03
3114.34:487:03

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.56 kWh/m².

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 5.67 kWh/m² in June across the year — May's 5.56 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Is May a good time to visit Zīr Āb?

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

5.6
Sightseeing
6th-best month of the year
3.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit Zīr Āb for sightseeing.

What to pack for Zīr Āb in May

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

In May, Zīr Āb sees daytime highs around 21°C and nights near 13°C. Pack rain gear. Worth having: sun protection. About 16 days see rain.

rain gearsun protection

UV index in Zīr Āb 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 Zīr Āb peaks around July 21 at about 11 (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 — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 21UV 11Jan 12UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar5High
Apr8Very high
May10Very high
Jun9Very high
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Zīr Āb 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 Zīr Āb is worst in December — around 45 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (July, 22 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorDec 1944 µg/m³Jul 1822 µg/m³
PM2.5 (µg/m³)Level
Jan43Poor
Feb41Poor
Mar39Poor
Apr38Poor
May33Moderate
Jun25Moderate
Jul22Moderate
Aug24Moderate
Sep31Moderate
Oct36Poor
Nov41Poor
Dec45Poor
Location & terrain

Where is Zīr Āb?

Zīr Āb sits at 36.2°N, 53.0°E, 398 m above sea level, in Iran. The nearest listed city is Qā’em Shahr, 33 km away.

Topography around Zīr Āb

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

Within 3 km, the terrain around Zīr Āb has large variations in elevation — a maximum elevation change of 760 m around an average of 648 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,045 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,024 m.

The land around Zīr Āb is covered by trees (81%) within 3 km, trees (89%) within 16 km, and trees (32%) and grassland (32%) within 80 km.

3 km
760 m
16 km
2,045 m
80 km
5,024 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Qā’em Shahr 33 km · Sari 43 km · Bābol 49 km · Fīrūzkūh 50 km · Jūybār 52 km · Amīr Kolā 54 km · Nekā 60 km · Mahdishahr 62 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 Zīr Āb (36.1797°, 52.9735°, elevation 398 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).