Īlām weather in December

In December, Īlām sees average daytime highs of 10°C and overnight lows near 1°C, with 78 mm of precipitation across 8.8 wet days and about 9.8 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 12°C in the first days to 9°C by the end. The sky is clear or mostly clear about 48% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of December to 9 h 48 min by month's end. Set against the rest of the year, December is Īlām's 10th-clearest and 11th-windiest month. For the whole year in context, see Īlām's year-round climate.

Daytime high
10°
10th warmest
Overnight low
3rd coldest
Precipitation
78 mm
8.8 wet days
Daylight
9 h 48 min
7:27 AM – 5:14 PM
Cloud cover
47%
10th clearest
Wind
6 km/h
11th windiest
Solar energy
2.85 kWh/m²
Travel score
2.6
out of 10

Īlām is city in Ilam Province, Iran.

Air quality
Elevated
PM2.5 18.7 µg/m³ · 2020

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 12°C in the first days to 9°C by the end.

A typical December day in Īlām reaches about 10°C in the afternoon and slips back to 1°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 15°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1122
2122
3122
4122
5122
6112
7111
8111
9111
10111
11111
12111
13101
14101
15101
16101
17101
18101
19100
20100
21100
22100
23100
24100
25100
2690
2790
2890
2990
3090
3190

How December really feels in Īlām

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 27 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
27
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Īlām weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°8910.15.2101.4
Feb10° / -0°8810.73.610.72.2
Mar14° / 9611.11.411.74.2
Apr19° / 679.5012.86.5
May26° / 12°214.9013.77.7
Jun32° / 17°10.3014.25.2
Jul36° / 20°00.10142.9
Aug36° / 19°00013.22.9
Sep31° / 15°10.3012.25.9
Oct24° / 10°304.3011.28.2
Nov16° / 7380.110.35.2
Dec10° / 788.81.89.82.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36040
45941
55941
65842
75842
85842
95842
105941
115941
125941
136040
146040
155941
166040
176040
186238
196238
206238
216238
226238
236337
246238
256238
266139
276139
286040
295941
305941
315941

Chance of precipitation in December

Any precipitationSnow

Īlām gets around 78 mm of rain and snow over 8.8 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 28% and peaks near 31% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1283
2293
3293
4304
5304
6305
7315
8315
9315
10316
11316
12316
13306
14306
15296
16296
17287
18287
19277
20277
21277
22267
23267
24267
25257
26257
27257
28267
29268
30268
31279

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December 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 December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 6 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
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 54 min at the start of December to 9 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 7:16 AM to 7:34 AM, and sunset from 5:12 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.97:165:12
29.97:175:12
39.97:185:12
49.97:195:12
59.97:195:12
69.97:205:12
79.87:215:12
89.87:225:12
99.87:225:12
109.87:235:12
119.87:245:13
129.87:255:13
139.87:255:13
149.87:265:13
159.87:275:14
169.87:275:14
179.87:285:14
189.87:285:15
199.87:295:15
209.87:295:15
219.87:305:16
229.87:305:16
239.87:315:17
249.87:315:17
259.87:325:18
269.87:325:18
279.87:325:19
289.87:335:19
299.87:335:20
309.87:335:21
319.87:345:21

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.85 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.85 kWh/m² to a high of 8.05 kWh/m² in June across the year — December's 2.85 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.0Moderate
23.0Moderate
33.0Moderate
42.9Moderate
52.9Moderate
62.9Moderate
72.9Moderate
82.9Moderate
92.9Moderate
102.9Moderate
112.9Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.8Moderate
162.8Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.9Moderate
242.9Moderate
252.9Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.9Moderate
Planning a trip in December

Hazard calendar for Īlām

In seasonPeak

In December, Īlām sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

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

Īlām 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 December a good time to visit Īlām?

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

2.6
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Īlām.

What to pack for Īlām in December

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

In December, Īlām sees daytime highs around 10°C and nights near 1°C. Pack a warm layer. Worth having: rain gear. About 9 days see rain.

a warm layerrain gear

UV index in Īlām in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Īlām peaks around June 13 at about 10 (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 highHighModerateJun 13UV 10Jan 12UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May10Very high
Jun11Extreme
Jul9Very high
Aug10Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Īlām in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Īlām is worst in May — around 23 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Īlām's WHO annual average of 18.7 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1223 µg/m³Nov 2315 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar21Moderate
Apr22Moderate
May23Moderate
Jun20Moderate
Jul19Moderate
Aug19Moderate
Sep18Moderate
Oct18Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Īlām?

Īlām sits at 33.6°N, 46.4°E, 1,403 m above sea level, in Iran. The nearest listed city is Eyvān, 24 km away.

Darreh ShahrSarpol-e Z̄ahābKūhdashtĀbdānān

Topography around Īlām

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

Within 3 km, the terrain around Īlām has large variations in elevation — a maximum elevation change of 620 m around an average of 1,488 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,803 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,742 m.

The land around Īlām is covered by artificial surfaces (41%) and grassland (38%) within 3 km, grassland (58%) within 16 km, and grassland (55%) and bare terrain (23%) within 80 km.

3 km
620 m
16 km
1,803 m
80 km
2,742 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Eyvān 24 km · Eslāmābād-e Gharb 53 km · Mandalī 81 km · Kermanshah 96 km · Darreh Shahr 104 km · Sarpol-e Z̄ahāb 105 km · Kūhdasht 111 km · Ābdānān 117 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 Īlām (33.6374°, 46.4227°, elevation 1,403 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).