Nā’īn weather in May

In May, Nā’īn sees average daytime highs of 27°C and overnight lows near 16°C, with 16 mm of rain across 4.3 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 25°C in the first days to 30°C by the end. The sky is clear or mostly clear about 53% 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 Nā’īn's 10th-clearest and 7th-windiest month. For the whole year in context, see Nā’īn's year-round climate.

Daytime high: 27°; 5th warmest
Overnight low: 16°; 8th coldest
Rainfall: 16 mm; 4.3 wet days
Daylight: 13 h 42 min; 5:03 AM – 6:44 PM
Cloud cover: 39%; 10th clearest
Wind: 13 km/h; 7th windiest
Solar energy: 7.49 kWh/m²
Travel score: 7.3; out of 10

Nā’īn is city in Isfahan Province, Iran.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← April Nā’īn year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 25°C in the first days to 30°C by the end.

A typical May day in Nā’īn reaches about 27°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°C. Set against its neighbours, May runs about 6°C warmer than April and about 5°C cooler than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	24	25	25	25	25	25	25	26	26	26	26	26	27	27	27	27	27	28	28	28	28	28	29	29	29	29	30	30	30	30	30
Avg low (°C)	13	13	14	14	14	14	14	14	15	15	15	15	15	16	16	16	16	16	16	17	17	17	17	17	17	18	18	18	18	18	19

	Avg high (°C)	Avg low (°C)
1	24	13
2	25	13
3	25	14
4	25	14
5	25	14
6	25	14
7	25	14
8	26	14
9	26	15
10	26	15
11	26	15
12	26	15
13	27	15
14	27	16
15	27	16
16	27	16
17	27	16
18	28	16
19	28	16
20	28	17
21	28	17
22	28	17
23	29	17
24	29	17
25	29	17
26	29	18
27	30	18
28	30	18
29	30	18
30	30	18
31	30	19

How May really feels in Nā’īn

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

heat index over the day's high

Days feeling ≤ 0°C

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.

Nā’īn 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.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	8° / -1°	21	4.8	2.9	10.1	1.8
Feb	11° / 1°	18	4.4	1.6	10.8	3.4
Mar	16° / 6°	27	5.5	0.8	11.8	5.9
Apr	22° / 11°	25	6.1	0.1	12.8	7.4
May	27° / 16°	16	4.3	0	13.7	7.3
Jun	33° / 21°	1	0.3	0	14.1	5.0
Jul	34° / 23°	0	0.1	0	13.9	3.8
Aug	33° / 21°	0	0.1	0	13.2	4.7
Sep	30° / 17°	0	0	0	12.2	7.1
Oct	23° / 11°	5	1.7	0	11.2	8.8
Nov	15° / 5°	16	3.6	0.5	10.3	5.7
Dec	10° / 1°	16	3.8	1.5	9.9	3.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 24% of May, with mostly cloudy or overcast conditions the remaining 23%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	63	64	65	65	66	66	67	69	70	71	73	73	75	75	77	77	78	79	80	81	82	82	83	84	85	86	87	88	88	90	90
Cloudier (%)	37	36	35	35	34	34	33	31	30	29	27	27	25	25	23	23	22	21	20	19	18	18	17	16	15	14	13	12	12	10	10

	Clearer (%)	Cloudier (%)
1	63	37
2	64	36
3	65	35
4	65	35
5	66	34
6	66	34
7	67	33
8	69	31
9	70	30
10	71	29
11	73	27
12	73	27
13	75	25
14	75	25
15	77	23
16	77	23
17	78	22
18	79	21
19	80	20
20	81	19
21	82	18
22	82	18
23	83	17
24	84	16
25	85	15
26	86	14
27	87	13
28	88	12
29	88	12
30	90	10
31	90	10

Chance of precipitation in May

Any precipitation

Nā’īn gets around 16 mm of rain over 4.3 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 13% and peaks near 19% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	19	19	19	19	18	18	18	17	17	16	16	15	14	14	13	13	12	12	12	11	11	11	10	10	9	9	8	8	7	7	6

	Rain chance (%)
1	19
2	19
3	19
4	19
5	18
6	18
7	18
8	17
9	17
10	16
11	16
12	15
13	14
14	14
15	13
16	13
17	12
18	12
19	12
20	11
21	11
22	11
23	10
24	10
25	9
26	9
27	8
28	8
29	7
30	7
31	6

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in May

Winds average 13 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	14	14	14	14	14	14	14	14	14	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	14	light breeze
2	14	light breeze
3	14	light breeze
4	14	light breeze
5	14	light breeze
6	14	light breeze
7	14	light breeze
8	14	light breeze
9	14	light breeze
10	13	light breeze
11	13	light breeze
12	13	light breeze
13	13	light breeze
14	13	light breeze
15	13	light breeze
16	13	light breeze
17	13	light breeze
18	13	light breeze
19	13	light breeze
20	13	light breeze
21	13	light breeze
22	13	light breeze
23	13	light breeze
24	13	light breeze
25	13	light breeze
26	13	light breeze
27	13	light breeze
28	13	light breeze
29	13	light breeze
30	13	light breeze
31	13	light breeze

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 5:16 AM to 4:55 AM, and sunset from 6:33 PM to 6:55 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	13.3	13.3	13.3	13.4	13.4	13.4	13.5	13.5	13.5	13.5	13.6	13.6	13.6	13.6	13.7	13.7	13.7	13.7	13.8	13.8	13.8	13.8	13.8	13.9	13.9	13.9	13.9	13.9	14.0	14.0	14.0
Sunrise (AM)	5:16	5:15	5:14	5:13	5:12	5:12	5:11	5:10	5:09	5:08	5:07	5:06	5:06	5:05	5:04	5:03	5:03	5:02	5:01	5:01	5:00	4:59	4:59	4:58	4:58	4:57	4:57	4:57	4:56	4:56	4:55
Sunset (PM)	6:33	6:34	6:35	6:36	6:36	6:37	6:38	6:39	6:39	6:40	6:41	6:42	6:42	6:43	6:44	6:44	6:45	6:46	6:47	6:47	6:48	6:49	6:49	6:50	6:51	6:51	6:52	6:53	6:53	6:54	6:55

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.3	5:16	6:33
2	13.3	5:15	6:34
3	13.3	5:14	6:35
4	13.4	5:13	6:36
5	13.4	5:12	6:36
6	13.4	5:12	6:37
7	13.5	5:11	6:38
8	13.5	5:10	6:39
9	13.5	5:09	6:39
10	13.5	5:08	6:40
11	13.6	5:07	6:41
12	13.6	5:06	6:42
13	13.6	5:06	6:42
14	13.6	5:05	6:43
15	13.7	5:04	6:44
16	13.7	5:03	6:44
17	13.7	5:03	6:45
18	13.7	5:02	6:46
19	13.8	5:01	6:47
20	13.8	5:01	6:47
21	13.8	5:00	6:48
22	13.8	4:59	6:49
23	13.8	4:59	6:49
24	13.9	4:58	6:50
25	13.9	4:58	6:51
26	13.9	4:57	6:51
27	13.9	4:57	6:52
28	13.9	4:57	6:53
29	14.0	4:56	6:53
30	14.0	4:56	6:54
31	14.0	4:55	6:55

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.49 kWh/m².

For context, solar energy here swings from a low near 3.31 kWh/m² to a high of 7.98 kWh/m² in June across the year — May's 7.49 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	7.1	7.1	7.2	7.2	7.2	7.2	7.3	7.3	7.3	7.3	7.4	7.4	7.4	7.5	7.5	7.5	7.5	7.6	7.6	7.6	7.6	7.7	7.7	7.7	7.7	7.8	7.8	7.8	7.8	7.8	7.9
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	7.1	Intense
2	7.1	Intense
3	7.2	Intense
4	7.2	Intense
5	7.2	Intense
6	7.2	Intense
7	7.3	Intense
8	7.3	Intense
9	7.3	Intense
10	7.3	Intense
11	7.4	Intense
12	7.4	Intense
13	7.4	Intense
14	7.5	Intense
15	7.5	Intense
16	7.5	Intense
17	7.5	Intense
18	7.6	Intense
19	7.6	Intense
20	7.6	Intense
21	7.6	Intense
22	7.7	Intense
23	7.7	Intense
24	7.7	Intense
25	7.7	Intense
26	7.8	Intense
27	7.8	Intense
28	7.8	Intense
29	7.8	Intense
30	7.8	Intense
31	7.9	Intense

Planning a trip in May

Hazard calendar for Nā’īn

In seasonPeak

In May, Nā’īn sits inside its dust season. The full year is below, with each hazard's peak months called out.

Nā’īn sees seasonal dust haze (July), heaviest in July.

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is May a good time to visit Nā’īn?

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

7.3

Sightseeing

3rd-best month of the year

7.8

Beach & pool

5th-best month of the year

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

What to pack for Nā’īn in May

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

In May, Nā’īn sees daytime highs around 27°C and nights near 16°C. Pack light clothes and sun protection. About 4 days see rain.

light clothessun protection

UV index in Nā’īn 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 Nā’īn peaks around July 18 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 — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	3	6	6	8	10	10	11	10	8	7	4	4
Level	Moderate	High	High	Very high	Very high	Very high	Extreme	Extreme	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	6	High
Mar	6	High
Apr	8	Very high
May	10	Very high
Jun	10	Very high
Jul	11	Extreme
Aug	10	Extreme
Sep	8	Very high
Oct	7	High
Nov	4	Moderate
Dec	4	Moderate

Air quality in Nā’īn 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 Nā’īn is worst in July — around 31 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 13 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	16	19	23	30	30	24	31	21	23	18	13	13
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	16	Moderate
Feb	19	Moderate
Mar	23	Moderate
Apr	30	Moderate
May	30	Moderate
Jun	24	Moderate
Jul	31	Moderate
Aug	21	Moderate
Sep	23	Moderate
Oct	18	Moderate
Nov	13	Moderate
Dec	13	Moderate

Location & terrain

Where is Nā’īn?

Nā’īn sits at 32.9°N, 53.1°E, 1,564 m above sea level, in Iran. The nearest listed city is Ardestān, 88 km away.

Topography around Nā’īn

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

Within 3 km, the terrain around Nā’īn has only modest variations in elevation — a maximum elevation change of 92 m around an average of 1,562 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 656 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,344 m.

The land around Nā’īn is covered by bare terrain (69%) and artificial surfaces (22%) within 3 km, bare terrain (98%) within 16 km, and bare terrain (99%) within 80 km.

3 km

92 m

bare terrain 69%

16 km

656 m

bare terrain 98%

80 km

2,344 m

bare terrain 99%

croplandartificial surfacesbare terrain

← April Nā’īn year-round climate June →Best places to visit in May

May weather nearby: Ardestān 88 km · Ardakān 106 km · Meybod 110 km · Bahārestān 130 km · Dowlatābād 130 km · Naţanz 131 km · Dastgerd 133 km · Isfahan 134 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

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 Nā’īn (32.8601°, 53.0875°, elevation 1,564 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).

	Avg high (°C)	Avg low (°C)
1	24	13
2	25	13
3	25	14
4	25	14
5	25	14
6	25	14
7	25	14
8	26	14
9	26	15
10	26	15
11	26	15
12	26	15
13	27	15
14	27	16
15	27	16
16	27	16
17	27	16
18	28	16
19	28	16
20	28	17
21	28	17
22	28	17
23	29	17
24	29	17
25	29	17
26	29	18
27	30	18
28	30	18
29	30	18
30	30	18
31	30	19

	Clearer (%)	Cloudier (%)
1	63	37
2	64	36
3	65	35
4	65	35
5	66	34
6	66	34
7	67	33
8	69	31
9	70	30
10	71	29
11	73	27
12	73	27
13	75	25
14	75	25
15	77	23
16	77	23
17	78	22
18	79	21
19	80	20
20	81	19
21	82	18
22	82	18
23	83	17
24	84	16
25	85	15
26	86	14
27	87	13
28	88	12
29	88	12
30	90	10
31	90	10

	Rain chance (%)
1	19
2	19
3	19
4	19
5	18
6	18
7	18
8	17
9	17
10	16
11	16
12	15
13	14
14	14
15	13
16	13
17	12
18	12
19	12
20	11
21	11
22	11
23	10
24	10
25	9
26	9
27	8
28	8
29	7
30	7
31	6

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	24	13
2	25	13
3	25	14
4	25	14
5	25	14
6	25	14
7	25	14
8	26	14
9	26	15
10	26	15
11	26	15
12	26	15
13	27	15
14	27	16
15	27	16
16	27	16
17	27	16
18	28	16
19	28	16
20	28	17
21	28	17
22	28	17
23	29	17
24	29	17
25	29	17
26	29	18
27	30	18
28	30	18
29	30	18
30	30	18
31	30	19

	Clearer (%)	Cloudier (%)
1	63	37
2	64	36
3	65	35
4	65	35
5	66	34
6	66	34
7	67	33
8	69	31
9	70	30
10	71	29
11	73	27
12	73	27
13	75	25
14	75	25
15	77	23
16	77	23
17	78	22
18	79	21
19	80	20
20	81	19
21	82	18
22	82	18
23	83	17
24	84	16
25	85	15
26	86	14
27	87	13
28	88	12
29	88	12
30	90	10
31	90	10

	Rain chance (%)
1	19
2	19
3	19
4	19
5	18
6	18
7	18
8	17
9	17
10	16
11	16
12	15
13	14
14	14
15	13
16	13
17	12
18	12
19	12
20	11
21	11
22	11
23	10
24	10
25	9
26	9
27	8
28	8
29	7
30	7
31	6

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	24	13
2	25	13
3	25	14
4	25	14
5	25	14
6	25	14
7	25	14
8	26	14
9	26	15
10	26	15
11	26	15
12	26	15
13	27	15
14	27	16
15	27	16
16	27	16
17	27	16
18	28	16
19	28	16
20	28	17
21	28	17
22	28	17
23	29	17
24	29	17
25	29	17
26	29	18
27	30	18
28	30	18
29	30	18
30	30	18
31	30	19

	Clearer (%)	Cloudier (%)
1	63	37
2	64	36
3	65	35
4	65	35
5	66	34
6	66	34
7	67	33
8	69	31
9	70	30
10	71	29
11	73	27
12	73	27
13	75	25
14	75	25
15	77	23
16	77	23
17	78	22
18	79	21
19	80	20
20	81	19
21	82	18
22	82	18
23	83	17
24	84	16
25	85	15
26	86	14
27	87	13
28	88	12
29	88	12
30	90	10
31	90	10

	Rain chance (%)
1	19
2	19
3	19
4	19
5	18
6	18
7	18
8	17
9	17
10	16
11	16
12	15
13	14
14	14
15	13
16	13
17	12
18	12
19	12
20	11
21	11
22	11
23	10
24	10
25	9
26	9
27	8
28	8
29	7
30	7
31	6

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100