Nā’īn weather in September

In September, Nā’īn sees average daytime highs of 30°C and overnight lows near 17°C, with 0 mm of rain across 0 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 32°C in the first days to 28°C by the end. The sky is clear or mostly clear about 94% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Nā’īn's 1st-clearest and 8th-windiest month. For the whole year in context, see Nā’īn's year-round climate.

Daytime high
30°
4th warmest
Overnight low
17°
9th coldest
Rainfall
0 mm
0 wet days
Daylight
12 h 12 min
5:46 AM – 5:58 PM
Cloud cover
9%
1st clearest
Wind
12 km/h
8th windiest
Solar energy
6.39 kWh/m²
Travel score
7.1
out of 10

Nā’īn is city in Isfahan Province, Iran.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 32°C in the first days to 28°C by the end.

A typical September day in Nā’īn reaches about 30°C in the afternoon and slips back to 17°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 33°C. Set against its neighbours, September runs about 3°C cooler than August and about 7°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13219
23219
33219
43119
53119
63118
73118
83118
93118
103118
113118
123118
133018
143017
153017
163017
173017
183017
192917
202917
212916
222916
232916
242816
252816
262815
272815
282815
292715
302715

How September really feels in Nā’īn

Once humidity and wind are folded in, September 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

September 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 September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°214.82.910.11.8
Feb11° / 184.41.610.83.4
Mar16° / 275.50.811.85.9
Apr22° / 11°256.10.112.87.4
May27° / 16°164.3013.77.3
Jun33° / 21°10.3014.15.0
Jul34° / 23°00.1013.93.8
Aug33° / 21°00.1013.24.7
Sep30° / 17°00012.27.1
Oct23° / 11°51.7011.28.8
Nov15° / 163.60.510.35.7
Dec10° / 163.81.59.93.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 94% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 5% of September, with mostly cloudy or overcast conditions the remaining 1%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1991
2991
3991
4991
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26982
27973
28973
29973
30973

Chance of precipitation in September

Any precipitation

Nā’īn gets around 0 mm of rain over 0 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 0% and peaks near 2% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
251
261
271
281
291
302

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September 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%151015202530
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

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 5:36 AM to 5:56 AM, and sunset from 6:19 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:366:19
212.75:376:17
312.65:376:16
412.65:386:15
512.65:396:13
612.55:396:12
712.55:406:11
812.55:416:09
912.45:416:08
1012.45:426:06
1112.45:436:05
1212.35:436:04
1312.35:446:02
1412.35:456:01
1512.25:455:59
1612.25:465:58
1712.25:475:57
1812.15:475:55
1912.15:485:54
2012.15:495:52
2112.05:495:51
2212.05:505:49
2312.05:515:48
2411.95:515:47
2511.95:525:45
2611.95:535:44
2711.85:535:43
2811.85:545:41
2911.75:555:40
3011.75:565:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.39 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 — September's 6.39 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.8Intense
56.8Intense
66.8Intense
76.7Intense
86.7Intense
96.6Intense
106.6Intense
116.6Intense
126.5Intense
136.5Intense
146.4Intense
156.4Intense
166.4Intense
176.3Intense
186.3Intense
196.3Intense
206.2Intense
216.2Intense
226.1Intense
236.1Intense
246.0Intense
256.0Intense
266.0Bright
275.9Bright
285.9Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Nā’īn

In seasonPeak

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

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

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

Is September a good time to visit Nā’īn?

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

7.1
Sightseeing
4th-best month of the year
9.2
Beach & pool
1st-best month of the year

September 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 September

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

In September, Nā’īn sees daytime highs around 30°C and nights near 17°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Nā’īn in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 18UV 11Jan 12UV 3
UV index (midday)Level
Jan3Moderate
Feb6High
Mar6High
Apr8Very high
May10Very high
Jun10Very high
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct7High
Nov4Moderate
Dec4Moderate

Air quality in Nā’īn in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September 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).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 930 µg/m³Dec 1013 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr30Moderate
May30Moderate
Jun24Moderate
Jul31Moderate
Aug21Moderate
Sep23Moderate
Oct18Moderate
Nov13Moderate
Dec13Moderate
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.

ArdakānMeybodBahārestānDowlatābādNaţanzDastgerdIsfahan

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
16 km
656 m
80 km
2,344 m
croplandartificial surfacesbare terrain
September 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
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 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).