Nahāvand weather in September

In September, Nahāvand sees average daytime highs of 29°C and overnight lows near 14°C, with 1 mm of rain across 0.2 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 27°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 Nahāvand's 1st-clearest and 7th-windiest month. For the whole year in context, see Nahāvand's year-round climate.

Daytime high
29°
4th warmest
Overnight low
14°
9th coldest
Rainfall
1 mm
0.2 wet days
Daylight
12 h 12 min
6:05 AM – 6:17 PM
Cloud cover
9%
1st clearest
Wind
7 km/h
7th windiest
Solar energy
6.33 kWh/m²
Travel score
7.3
out of 10

Nahāvand is city in Hamadan Province, Iran.

Air quality
Elevated
PM2.5 19.5 µg/m³ · 2016

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 27°C by the end.

A typical September day in Nahāvand reaches about 29°C in the afternoon and slips back to 14°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, September runs about 5°C cooler than August and about 8°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
13216
23216
33216
43216
53216
63115
73115
83115
93115
103115
113114
123014
133014
143014
153014
163013
172913
182913
192913
202913
212813
222812
232812
242812
252712
262712
272711
282711
292611
302611

How September really feels in Nahāvand

Once humidity and wind are folded in, September averages 2 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
2
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Nahāvand 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 / -6°649.88.1100.0
Feb / -4°67107.610.70.6
Mar11° / 9111.35.211.72.9
Apr17° / 7211.30.612.85.4
May23° / 11°317.3013.87.5
Jun30° / 16°30.9014.26.5
Jul34° / 19°10.10143.8
Aug34° / 18°10.2013.34.0
Sep29° / 14°10.2012.27.3
Oct22° / 254.4011.18.1
Nov13° / 598.11.210.24.0
Dec / -3°627.95.69.81.2

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 (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
12991
13991
141000
151000
161000
171000
181000
191000
20982
21982
22982
23982
24982
25973
26973
27973
28964
29955
30955

Chance of precipitation in September

Any precipitation

Nahāvand gets around 1 mm of rain over 0.2 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 1% and peaks near 2% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
261
272
282
292
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 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:54 AM to 6:15 AM, and sunset from 6:39 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:546:39
212.75:546:37
312.75:556:36
412.65:566:34
512.65:576:33
612.65:576:32
712.55:586:30
812.55:596:29
912.56:006:27
1012.46:006:26
1112.46:016:24
1212.46:026:23
1312.36:026:22
1412.36:036:20
1512.26:046:19
1612.26:056:17
1712.26:056:16
1812.16:066:14
1912.16:076:13
2012.16:076:11
2112.06:086:10
2212.06:096:08
2312.06:106:07
2411.96:106:05
2511.96:116:04
2611.86:126:03
2711.86:136:01
2811.86:136:00
2911.76:145:58
3011.76:155:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.33 kWh/m².

For context, solar energy here swings from a low near 2.83 kWh/m² to a high of 8.05 kWh/m² in June across the year — September's 6.33 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.7Intense
66.7Intense
76.7Intense
86.6Intense
96.6Intense
106.6Intense
116.5Intense
126.5Intense
136.4Intense
146.4Intense
156.4Intense
166.3Intense
176.3Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.0Intense
236.0Intense
246.0Bright
255.9Bright
265.9Bright
275.8Bright
285.8Bright
295.7Bright
305.7Bright
Planning a trip in September

Is September a good time to visit Nahāvand?

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

7.3
Sightseeing
3rd-best month of the year
9.0
Beach & pool
1st-best month of the year

September is one of the better times to visit Nahāvand for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Nahāvand in September

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

In September, Nahāvand sees daytime highs around 29°C and nights near 14°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Nahāvand in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Nahāvand peaks around July 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 13 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 highModerateJul 18UV 11Jan 13UV 3
UV index (midday)Level
Jan3Moderate
Feb6High
Mar6High
Apr7Very high
May10Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct7High
Nov4Moderate
Dec4Moderate

Air quality in Nahāvand 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 Nahāvand is worst in April — around 26 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Nahāvand's WHO annual average of 19.5 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 2025 µg/m³Nov 2316 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb19Moderate
Mar23Moderate
Apr26Moderate
May25Moderate
Jun19Moderate
Jul19Moderate
Aug17Moderate
Sep18Moderate
Oct18Moderate
Nov16Moderate
Dec17Moderate
Location & terrain

Where is Nahāvand?

Nahāvand sits at 34.2°N, 48.4°E, 1,673 m above sea level, in Iran. The nearest listed city is Aleshtar, 38 km away.

Topography around Nahāvand

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

Within 3 km, the terrain around Nahāvand has significant variations in elevation — a maximum elevation change of 374 m around an average of 1,691 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,384 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,623 m.

The land around Nahāvand is covered by artificial surfaces (27%), trees (24%) and grassland (21%) within 3 km, grassland (45%) and cropland (37%) within 16 km, and grassland (51%) and cropland (34%) within 80 km.

3 km
374 m
16 km
1,384 m
80 km
2,623 m
treesgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Aleshtar 38 km · Nūrābād 39 km · Tūyserkān 41 km · Malāyer 43 km · Borūjerd 48 km · Kangāvar 51 km · Hamadan 69 km · Asadābād 70 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 Nahāvand (34.1909°, 48.3745°, elevation 1,673 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).