Tehran weather in January

In January, Tehran sees average daytime highs of 1°C and overnight lows near -7°C, with 42 mm of precipitation across 7.6 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 1°C through the month. The sky is clear or mostly clear about 56% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Tehran's 7th-clearest and 6th-windiest month. For the whole year in context, see Tehran's year-round climate.

Daytime high
12th warmest
Overnight low
-7°
1st coldest
Precipitation
42 mm
7.6 wet days
Daylight
9 h 48 min
7:19 AM – 5:09 PM
Cloud cover
40%
7th clearest
Wind
6 km/h
6th windiest
Solar energy
3.38 kWh/m²
Travel score
0.0
out of 10

Tehran is capital city of Iran.

Air quality
High
PM2.5 31.4 µg/m³ · 2020
Density
10,428/km²
people per km²
Founded
1794

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 1°C through the month.

A typical January day in Tehran reaches about 1°C in the afternoon and slips back to -7°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between -4°C and 7°C. Set against its neighbours, January runs about 3°C cooler than December and about 2°C cooler than February.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
12-6
22-6
32-7
42-7
52-7
62-7
72-7
82-7
91-7
101-7
111-7
121-8
131-8
141-8
151-8
161-8
171-8
181-8
191-8
201-8
211-8
221-8
231-8
241-8
251-8
261-7
271-7
281-7
291-7
301-7
311-7

How January really feels in Tehran

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 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
31
25 feel bitter (≤ -10°C)

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

Tehran weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -7°427.66.79.90.0
Feb / -6°488.46.810.60.0
Mar / -0°629.55.511.71.6
Apr15° / 519.51.112.94.8
May22° / 13°224.90.113.97.7
Jun28° / 18°61.6014.47.7
Jul31° / 22°51.2014.25.9
Aug30° / 21°40.8013.36.7
Sep26° / 16°50.9012.29.0
Oct19° / 10°214.10.111.17.3
Nov10° / 447.1310.12.5
Dec / -5°437.75.99.60.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 14% of January, with mostly cloudy or overcast conditions the remaining 30%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27030
37030
47030
57030
67030
76931
86931
97030
107030
117030
127030
137030
147030
157129
167129
177129
187129
197129
207129
217030
227030
237129
247030
257030
266931
276931
286931
296931
306832
316832

Chance of precipitation in January

Any precipitationSnow

Tehran gets around 42 mm of rain and snow over 7.6 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 24% and peaks near 30% on the wettest days, and about 7 days bring snow. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12217
22218
32318
42319
52319
62320
72320
82320
92320
102320
112320
122320
132220
142220
152220
162120
172120
182120
192220
202221
212321
222322
232422
242523
252624
262724
272725
282825
292926
302926
313026

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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 January

Winds average 6 km/h in January.

Across January, 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 January

DaylightNight

Daylight runs from about 9 h 36 min at the start of January to 10 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over January. Sunrise moves from 7:19 AM to 7:12 AM, and sunset from 4:56 PM to 5:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:194:56
29.67:194:57
39.67:194:58
49.67:194:58
59.77:194:59
69.77:205:00
79.77:205:01
89.77:205:01
99.77:205:02
109.77:205:03
119.77:195:04
129.87:195:05
139.87:195:06
149.87:195:07
159.87:195:08
169.87:195:09
179.97:185:09
189.97:185:10
199.97:185:11
209.97:185:12
219.97:175:13
2210.07:175:14
2310.07:165:15
2410.07:165:16
2510.07:155:17
2610.17:155:18
2710.17:145:19
2810.17:145:20
2910.17:135:21
3010.27:135:22
3110.27:125:23

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.38 kWh/m².

For context, solar energy here swings from a low near 2.9 kWh/m² to a high of 7.69 kWh/m² in June across the year — January's 3.38 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.0Moderate
23.1Moderate
33.1Moderate
43.1Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.2Moderate
93.2Moderate
103.2Moderate
113.2Moderate
123.3Moderate
133.3Moderate
143.3Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.8Moderate
293.8Moderate
303.8Moderate
313.9Moderate
Planning a trip in January

Is January a good time to visit Tehran?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Tehran.

What to pack for Tehran in January

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

In January, Tehran sees daytime highs around 1°C and nights near -7°C. Pack a warm layer and a heavy coat. About 8 days see rain.

a warm layera heavy coat

UV index in Tehran in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tehran peaks around July 17 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highHighModerateJul 17UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar5Moderate
Apr7Very high
May9Very high
Jun10Very high
Jul10Extreme
Aug10Very high
Sep7Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Tehran in January

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Tehran is worst in January — around 47 µg/m³ PM2.5 (poor), about 3.1× the cleanest month (July, 15 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Tehran's WHO annual average of 31.4 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 1247 µg/m³Jul 1816 µg/m³
PM2.5 (µg/m³)Level
Jan47Poor
Feb43Poor
Mar35Poor
Apr31Moderate
May26Moderate
Jun20Moderate
Jul15Moderate
Aug18Moderate
Sep24Moderate
Oct32Moderate
Nov38Poor
Dec46Poor
Location & terrain

Where is Tehran?

Tehran sits at 35.7°N, 51.4°E, 1,178 m above sea level, in Iran. The nearest listed city is Vaḩīdīyeh, 5.0 km away.

Topography around Tehran

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

Within 3 km, the terrain around Tehran has only modest variations in elevation — a maximum elevation change of 152 m around an average of 1,186 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,728 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,034 m.

The land around Tehran is covered by artificial surfaces (96%) within 3 km, artificial surfaces (60%) within 16 km, and bare terrain (38%) and grassland (37%) within 80 km.

3 km
152 m
16 km
1,728 m
80 km
5,034 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
January weather nearby: Vaḩīdīyeh 5.0 km · Shahrak-e Qods 8.0 km · Morteẕá Gerd 12 km · Tajrīsh 12 km · Shahrak-e ‘Alā’īn 13 km · Andīsheh 14 km · Chahār Dangeh 14 km · Bāqershahr 18 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 Tehran (35.6944°, 51.4215°, elevation 1,178 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).