Eyvān weather in September

In September, Eyvān sees average daytime highs of 33°C and overnight lows near 17°C, with 1 mm of rain across 0.3 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 30°C by the end. The sky is clear or mostly clear about 97% 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 Eyvān's 1st-clearest and 5th-windiest month. For the whole year in context, see Eyvān's year-round climate.

Daytime high
33°
4th warmest
Overnight low
17°
9th coldest
Rainfall
1 mm
0.3 wet days
Daylight
12 h 12 min
6:13 AM – 6:25 PM
Cloud cover
5%
1st clearest
Wind
9 km/h
5th windiest
Solar energy
6.33 kWh/m²
Travel score
5.1
out of 10

Eyvān is city in Ilam 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 35°C in the first days to 30°C by the end.

A typical September day in Eyvān reaches about 33°C in the afternoon and slips back to 17°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13519
23519
33519
43519
53519
63519
73418
83418
93418
103418
113418
123317
133317
143317
153317
163317
173317
183217
193217
203216
213216
223116
233116
243116
253116
263116
273015
283015
293015
303015

How September really feels in Eyvān

Once humidity and wind are folded in, September averages 19 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
19
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.

Eyvān weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°9410.13.8102.0
Feb11° / 9010.32.510.72.7
Mar15° / 9510.40.911.74.8
Apr21° / 628.6012.86.9
May27° / 14°193.7013.77.4
Jun34° / 19°10.2014.24.3
Jul37° / 22°00.10142.2
Aug37° / 21°00.1013.32.2
Sep33° / 17°10.3012.25.1
Oct26° / 12°283.6011.18.0
Nov17° / 747.70.110.25.8
Dec12° / 818.81.39.83.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 97% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 2% 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
151000
161000
171000
181000
191000
201000
21991
22991
23991
24991
25991
26982
27982
28982
29964
30964

Chance of precipitation in September

Any precipitation

Eyvān gets around 1 mm of rain over 0.3 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
242
252
262
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 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:02 AM to 6:23 AM, and sunset from 6:47 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:026:47
212.76:036:45
312.76:046:44
412.66:046:42
512.66:056:41
612.66:066:40
712.56:076:38
812.56:076:37
912.56:086:35
1012.46:096:34
1112.46:096:33
1212.46:106:31
1312.36:116:30
1412.36:116:28
1512.26:126:27
1612.26:136:25
1712.26:146:24
1812.16:146:22
1912.16:156:21
2012.16:166:19
2112.06:166:18
2212.06:176:17
2312.06:186:15
2411.96:196:14
2511.96:196:12
2611.86:206:11
2711.86:216:09
2811.86:216:08
2911.76:226:07
3011.76:236:05

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 2.85 kWh/m² to a high of 8.03 kWh/m² in June across the year — September's 6.33 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.8Intense
46.8Intense
56.8Intense
66.7Intense
76.7Intense
86.7Intense
96.6Intense
106.6Intense
116.5Intense
126.5Intense
136.5Intense
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

Hazard calendar for Eyvān

In seasonPeak

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

Eyvān's rainy season runs November–April, when most of the year's rain falls.

Eyvān sees seasonal dust haze (April–May), heaviest in May.

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

Is September a good time to visit Eyvān?

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

5.1
Sightseeing
5th-best month of the year
8.4
Beach & pool
1st-best month of the year

September is a reasonable time to visit Eyvān for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Eyvān in September

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

In September, Eyvān sees daytime highs around 33°C and nights near 17°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Eyvān 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 Eyvān peaks around June 15 at about 10 (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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highVery highHighModerateJun 15UV 10Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May10Very high
Jun11Extreme
Jul9Very high
Aug11Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Eyvān 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 Eyvān is worst in May — around 41 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1241 µg/m³Nov 2327 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb31Moderate
Mar37Poor
Apr40Poor
May41Poor
Jun35Moderate
Jul34Moderate
Aug33Moderate
Sep32Moderate
Oct32Moderate
Nov27Moderate
Dec27Moderate
Location & terrain

Where is Eyvān?

Eyvān sits at 33.8°N, 46.3°E, 1,184 m above sea level, in Iran. The nearest listed city is Īlām, 24 km away.

Qaşr-e ShīrīnKhānaqīnRavānsar

Topography around Eyvān

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

Within 3 km, the terrain around Eyvān has large variations in elevation — a maximum elevation change of 701 m around an average of 1,303 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,464 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,728 m.

The land around Eyvān is covered by grassland (43%) and cropland (39%) within 3 km, grassland (63%) and cropland (23%) within 16 km, and grassland (56%) and cropland (23%) within 80 km.

3 km
701 m
16 km
1,464 m
80 km
2,728 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Īlām 24 km · Eslāmābād-e Gharb 37 km · Mandalī 70 km · Sarpol-e Z̄ahāb 82 km · Kermanshah 88 km · Qaşr-e Shīrīn 102 km · Khānaqīn 103 km · Ravānsar 104 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 Eyvān (33.8272°, 46.3097°, elevation 1,184 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).