Chālūs weather in January

In January, Chālūs sees average daytime highs of 12°C and overnight lows near 9°C, with 142 mm of precipitation across 15.2 wet days and about 9.8 hours of daylight. It is the 11th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 12°C through the month. The sky is clear or mostly clear about 28% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 30 min at the start of January to 10 h 06 min by month's end. Set against the rest of the year, January is Chālūs's 11th-clearest and 5th-windiest month. For the whole year in context, see Chālūs's year-round climate.

Daytime high
12°
11th warmest
Overnight low
2nd coldest
Precipitation
142 mm
15.2 wet days
Daylight
9 h 48 min
7:21 AM – 5:06 PM
Cloud cover
64%
11th clearest
Wind
10 km/h
5th windiest
Solar energy
2.29 kWh/m²
Travel score
2.6
out of 10

Chālūs is city in Mazandaran Province, Iran.

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 12°C through the month.

A typical January day in Chālūs reaches about 12°C in the afternoon and slips back to 9°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 15°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11310
21210
31210
4129
5129
6129
7129
8129
9129
10129
11129
12129
13119
14119
15119
16118
17118
18118
19118
20118
21118
22118
23118
24118
25118
26118
27118
28118
29118
30118
31118

Chālūs weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan12° / 14215.20.79.82.6
Feb11° / 12314.1110.62.5
Mar13° / 10014.10.111.73.3
Apr17° / 13°6811.3012.95.1
May21° / 18°489.8013.96.6
Jun25° / 22°498.5014.57.4
Jul27° / 24°5910.8014.36.8
Aug27° / 25°6011.2013.46.6
Sep25° / 22°14814.6012.26.3
Oct22° / 19°20515.2011.15.9
Nov17° / 14°21915.80.1104.7
Dec14° / 11°15614.809.53.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24357
34357
44258
54159
64159
74159
84159
94159
104060
113961
123961
133961
143961
153961
163862
173862
183862
193763
203763
213763
223763
233763
243862
253862
263862
273862
283862
293961
303961
313961

Chance of precipitation in January

Any precipitationSnow

Chālūs gets around 142 mm of rain and snow over 15.2 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 49% and peaks near 51% on the wettest days, and about 1 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1431
2441
3441
4451
5461
6471
7471
8481
9491
10491
11491
12501
13501
14501
15511
16511
17512
18512
19512
20512
21513
22503
23503
24503
25504
26504
27504
28504
29495
30495
31495

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 10 km/h in January.

Across January, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
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
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 30 min at the start of January to 10 h 06 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 7:21 AM to 7:14 AM, and sunset from 4:53 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.57:214:53
29.57:224:54
39.67:224:55
49.67:224:56
59.67:224:56
69.67:224:57
79.67:224:58
89.67:224:59
99.67:225:00
109.67:225:01
119.77:225:02
129.77:225:02
139.77:225:03
149.77:225:04
159.77:215:05
169.87:215:06
179.87:215:07
189.87:215:08
199.87:205:09
209.87:205:10
219.97:195:11
229.97:195:12
239.97:195:13
249.97:185:14
2510.07:185:15
2610.07:175:16
2710.07:165:17
2810.07:165:18
2910.17:155:19
3010.17:155:20
3110.17:145:21

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.29 kWh/m².

For context, solar energy here swings from a low near 2 kWh/m² to a high of 6.42 kWh/m² in June across the year — January's 2.29 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.1Moderate
42.1Moderate
52.1Moderate
62.1Moderate
72.1Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in January

Hazard calendar for Chālūs

In seasonPeak

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

Chālūs's rainy season runs September–March, when most of the year's rain falls.

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

Is January a good time to visit Chālūs?

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

2.6
Sightseeing
11th-best month of the year
0.0
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Chālūs.

What to pack for Chālūs in January

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

In January, Chālūs sees daytime highs around 12°C and nights near 9°C. Pack a warm layer and rain gear. About 15 days see rain.

a warm layerrain gear

Sea temperature near Chālūs in January

The nearest coast averages about 12°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 km away) is warmest in August at about 28°C and coldest in February near 11°C.

It's comfortable for a long swim from May 21 to Nov 7 — about 5.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar11Bracing
Apr14Bracing
May19Cool
Jun24Warm
Jul27Warm
Aug28Tropical
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec15Cool

UV index in Chālūs in January

LowModerateHighVery highExtreme

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

Under clear skies, the midday UV index in Chālūs peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Moderate

Air quality in Chālūs 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 Chālūs is worst in February — around 46 µg/m³ PM2.5 (poor), about 3.0× the cleanest month (July, 15 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateFeb 1545 µg/m³Jul 1716 µg/m³
PM2.5 (µg/m³)Level
Jan42Poor
Feb46Poor
Mar42Poor
Apr36Poor
May31Moderate
Jun21Moderate
Jul15Moderate
Aug20Moderate
Sep27Moderate
Oct30Moderate
Nov32Moderate
Dec36Poor
Location & terrain

Where is Chālūs?

Chālūs sits at 36.7°N, 51.4°E, 26 m above sea level, in Iran. The nearest listed city is Nowshahr, 7.0 km away.

Topography around Chālūs

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

Within 3 km, the terrain around Chālūs has significant variations in elevation — a maximum elevation change of 284 m around an average of 33 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,846 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,754 m.

The land around Chālūs is covered by artificial surfaces (40%) and trees (39%) within 3 km, trees (47%) and water (42%) within 16 km, and water (46%), grassland (26%) and trees (21%) within 80 km.

3 km
284 m
16 km
1,846 m
80 km
4,754 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Nowshahr 7.0 km · Tonekābon 52 km · Nūr 54 km · Katālem va Sādāt Shahr 70 km · Rāmsar 75 km · Maḩmūdābād 75 km · Āmol 86 km · Tajrīsh 95 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 Chālūs (36.655°, 51.4204°, elevation 26 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).