Fīrūzkūh weather in May

In May, Fīrūzkūh sees average daytime highs of 17°C and overnight lows near 8°C, with 63 mm of precipitation across 13.7 wet days and about 13.9 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 19°C by the end. The sky is clear or mostly clear about 39% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 12 min by month's end. Set against the rest of the year, May is Fīrūzkūh's 10th-clearest and 2nd-windiest month. For the whole year in context, see Fīrūzkūh's year-round climate.

Daytime high
17°
5th warmest
Overnight low
8th coldest
Precipitation
63 mm
13.7 wet days
Daylight
13 h 54 min
4:59 AM – 6:52 PM
Cloud cover
49%
10th clearest
Wind
6 km/h
2nd windiest
Solar energy
6.45 kWh/m²
Travel score
5.0
out of 10

Fīrūzkūh is city in Tehran 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 14°C in the first days to 19°C by the end.

A typical May day in Fīrūzkūh reaches about 17°C in the afternoon and slips back to 8°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 21°C. Set against its neighbours, May runs about 6°C warmer than April and about 5°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1146
2146
3146
4146
5156
6157
7157
8157
9157
10167
11167
12168
13168
14168
15168
16178
17178
18179
19179
20179
21189
22189
23189
24189
251810
261910
271910
281910
291910
302010
312011

How May really feels in Fīrūzkūh

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.

Fīrūzkūh weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -8°276.57.49.90.0
Feb-1° / -7°367.37.910.60.0
Mar / -3°539.47.811.70.2
Apr11° / 6311.93.412.92.5
May17° / 6313.70.513.95.0
Jun22° / 12°4310.7014.46.9
Jul25° / 15°388.8014.27.7
Aug24° / 15°337.7013.48.0
Sep21° / 11°328.2012.27.3
Oct14° / 368.71.211.14.7
Nov / -1°357.65.910.10.9
Dec / -6°276.46.79.60.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 25% of May, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25347
35347
45545
55545
65743
75743
85941
95941
106139
116139
126238
136337
146436
156535
166535
176634
186634
196733
206931
216931
227030
237129
247129
257228
267327
277327
287426
297426
307525
317525

Chance of precipitation in May

Any precipitationSnow

Fīrūzkūh gets around 63 mm of rain and snow over 13.7 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 44% and peaks near 46% on the wettest days, and about 1 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1426
2425
3425
4424
5424
6423
7423
8422
9422
10422
11431
12431
13441
14441
15451
16451
17461
18461
19461
20461
21461
22461
23461
24461
25460
26450
27450
28440
29430
30420
31410

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 6 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 12 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 5:13 AM to 4:50 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)
113.45:136:39
213.55:126:40
313.55:116:41
413.55:106:42
513.65:096:42
613.65:086:43
713.65:076:44
813.75:066:45
913.75:056:46
1013.75:046:47
1113.75:036:48
1213.85:026:48
1313.85:016:49
1413.85:006:50
1513.94:596:51
1613.94:596:52
1713.94:586:52
1813.94:576:53
1914.04:566:54
2014.04:566:55
2114.04:556:56
2214.04:546:56
2314.14:546:57
2414.14:536:58
2514.14:536:59
2614.14:526:59
2714.14:517:00
2814.24:517:01
2914.24:517:02
3014.24:507:02
3114.24:507:03

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.45 kWh/m².

For context, solar energy here swings from a low near 2.92 kWh/m² to a high of 6.7 kWh/m² in June across the year — May's 6.45 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.7Intense
296.7Intense
306.7Intense
316.7Intense
Planning a trip in May

Is May a good time to visit Fīrūzkūh?

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

5.0
Sightseeing
5th-best month of the year
1.2
Beach & pool
5th-best month of the year

May is a reasonable time to visit Fīrūzkūh for sightseeing.

What to pack for Fīrūzkūh in May

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

In May, Fīrūzkūh sees daytime highs around 17°C and nights near 8°C. Pack sun protection. Worth having: a warm layer and rain gear. About 14 days see rain.

sun protectiona warm layerrain gear

UV index in Fīrūzkūh 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 Fīrūzkūh peaks around July 19 at about 11 (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 — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 19UV 11Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb5High
Mar5Moderate
Apr8Very high
May10Very high
Jun10Very high
Jul11Extreme
Aug11Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Fīrūzkūh 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 Fīrūzkūh is worst in December — around 97 µg/m³ PM2.5 (unhealthy), about 3.0× the cleanest month (July, 33 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorPoorUnhealthyDec 2396 µg/m³Jul 1833 µg/m³
PM2.5 (µg/m³)Level
Jan95Unhealthy
Feb88Unhealthy
Mar76Unhealthy
Apr68Unhealthy
May57Unhealthy
Jun42Poor
Jul33Moderate
Aug38Poor
Sep51Poor
Oct67Unhealthy
Nov83Unhealthy
Dec97Unhealthy
Location & terrain

Where is Fīrūzkūh?

Fīrūzkūh sits at 35.8°N, 52.8°E, 1,943 m above sea level, in Iran. The nearest listed city is Zīr Āb, 50 km away.

Topography around Fīrūzkūh

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

Within 3 km, the terrain around Fīrūzkūh has significant variations in elevation — a maximum elevation change of 555 m around an average of 2,025 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,550 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,587 m.

The land around Fīrūzkūh is covered by grassland (47%) and bare terrain (21%) within 3 km, grassland (67%) and bare terrain (20%) within 16 km, and grassland (37%), bare terrain (37%) and trees (20%) within 80 km.

3 km
555 m
16 km
1,550 m
80 km
5,587 m
treesgrasslandcroplandartificial surfacesbare terrain
May weather nearby: Zīr Āb 50 km · Mahdishahr 53 km · Semnan 60 km · Damāvand 63 km · Garmsār 71 km · Īstgāh-e Rāh Āhan-e Garmsār 72 km · Rūdehen 78 km · Qā’em Shahr 79 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 Fīrūzkūh (35.7567°, 52.7706°, elevation 1,943 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).