Lāhījān weather in December

In December, Lāhījān sees average daytime highs of 13°C and overnight lows near 6°C, with 124 mm of precipitation across 11.5 wet days and about 9.5 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 13°C through the month. The sky is clear or mostly clear about 34% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Lāhījān's 7th-clearest and 6th-windiest month. For the whole year in context, see Lāhījān's year-round climate.

Daytime high
13°
10th warmest
Overnight low
3rd coldest
Precipitation
124 mm
11.5 wet days
Daylight
9 h 30 min
7:23 AM – 4:50 PM
Cloud cover
58%
7th clearest
Wind
7 km/h
6th windiest
Solar energy
2.1 kWh/m²
Travel score
3.7
out of 10

Lāhījān is city in Gilan Province, Iran.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 13°C through the month.

A typical December day in Lāhījān reaches about 13°C in the afternoon and slips back to 6°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 18°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1157
2147
3147
4147
5147
6147
7147
8146
9146
10146
11146
12146
13136
14136
15136
16136
17136
18135
19135
20135
21135
22135
23135
24135
25135
26135
27135
28135
29135
30135
31135

How December really feels in Lāhījān

Once humidity and wind are folded in, December 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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Lāhījān 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
Jan12° / 116121.69.72.9
Feb12° / 12112.32.210.62.9
Mar15° / 11513.30.411.74.1
Apr19° / 10°8110.5012.95.8
May23° / 15°508.50147.0
Jun27° / 19°648.4014.56.7
Jul29° / 22°729.9014.35.5
Aug30° / 22°8411.7013.45.2
Sep26° / 19°15814.1012.36.0
Oct22° / 15°17414.30116.1
Nov17° / 10°16813.60.2104.9
Dec13° / 12411.50.79.53.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34060
44060
54060
64060
74060
84060
94159
104357
114357
124357
134357
144555
154654
164753
174753
184852
194951
204951
215050
225050
235149
245149
255149
265248
275248
285248
295149
305149
315149

Chance of precipitation in December

Any precipitationSnow

Lāhījān gets around 124 mm of rain and snow over 11.5 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 37% and peaks near 46% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1461
2461
3451
4451
5451
6441
7442
8432
9432
10422
11413
12403
13393
14393
15383
16373
17363
18363
19353
20343
21343
22333
23323
24313
25313
26303
27303
28303
29303
30313
31313

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 (%)Comfortable (%)
1991
2991
3991
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
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
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 36 min at the start of December to 9 h 30 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 7:11 AM to 7:29 AM, and sunset from 4:49 PM to 4:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:114:49
29.67:124:48
39.67:134:48
49.67:144:48
59.67:144:48
69.57:154:48
79.57:164:48
89.57:174:48
99.57:184:48
109.57:184:48
119.57:194:49
129.57:204:49
139.57:214:49
149.57:214:49
159.57:224:49
169.57:234:50
179.47:234:50
189.47:244:50
199.47:244:51
209.47:254:51
219.47:254:52
229.47:264:52
239.47:264:53
249.47:274:53
259.47:274:54
269.47:274:54
279.47:284:55
289.57:284:55
299.57:284:56
309.57:294:57
319.57:294:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.1 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.1 kWh/m² to a high of 6.42 kWh/m² in June across the year — December's 2.1 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.1Moderate
42.1Moderate
52.1Moderate
62.1Moderate
72.0Moderate
82.0Moderate
92.0Moderate
102.0Moderate
112.0Moderate
122.0Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.1Moderate
222.1Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in December

Hazard calendar for Lāhījān

In seasonPeak

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

Lāhījān sees seasonal dust haze (May), heaviest in May.

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

Is December a good time to visit Lāhījān?

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

3.7
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 Lāhījān.

What to pack for Lāhījān in December

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

In December, Lāhījān sees daytime highs around 13°C and nights near 6°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Lāhījān in December

The nearest coast averages about 15°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) is warmest in August at about 28°C and coldest in February near 10°C.

It's comfortable for a long swim from May 24 to Nov 4 — about 5.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar11Bracing
Apr13Bracing
May19Cool
Jun24Warm
Jul27Warm
Aug28Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec15Bracing

UV index in Lāhījān in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lāhījān peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 17UV 9Jan 11UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct5Moderate
Nov3Moderate
Dec2Moderate

Air quality in Lāhījān 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 Lāhījān is worst in September — around 30 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (July, 15 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 2129 µg/m³Jul 1115 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar26Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul15Moderate
Aug21Moderate
Sep30Moderate
Oct28Moderate
Nov22Moderate
Dec18Moderate
Location & terrain

Where is Lāhījān?

Lāhījān sits at 37.2°N, 50.0°E, 4 m above sea level, in Iran. The nearest listed city is Āstāneh-ye Ashrafīyeh, 9.0 km away.

Topography around Lāhījān

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

Within 3 km, the terrain around Lāhījān has significant variations in elevation — a maximum elevation change of 344 m around an average of 18 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,110 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,710 m.

The land around Lāhījān is covered by artificial surfaces (36%) and trees (34%) within 3 km, cropland (45%) and trees (43%) within 16 km, and water (43%) and trees (23%) within 80 km.

3 km
344 m
16 km
1,110 m
80 km
3,710 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Āstāneh-ye Ashrafīyeh 9.0 km · Langarūd 13 km · Sīāhkal 13 km · Amlash 20 km · Rūdsar 26 km · Khomām 37 km · Rasht 38 km · Bandar-e Anzalī 57 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 Lāhījān (37.2042°, 50.0092°, elevation 4 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).