Chālūs in Winter
In winter (December, January and February), Chālūs sees average daytime highs around 12°C and overnight lows near 9°C, with 421 mm of precipitation over about 44 wet days across the season. It is the coldest season of the year and the 2nd-wettest season.
Over the season highs ease from about 14°C in early December to 12°C by late February. The sky is clear or mostly clear about 26% of the time across winter, and the air most often feels dry.
Winter is Chālūs's weakest season of the year to visit on our travel score. For the whole year in context, see Chālūs's year-round climate.
- Avg daytime high
- 12°C
- coldest season of the year
- Avg overnight low
- 9°C
- Precipitation
- 421 mm
- 44 wet days
- Avg wind
- 10 km/h
- Travel score
- 2.8
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Chālūs in Winter
Over the season highs ease from about 14°C in early December to 12°C by late February.
A typical winter day in Chālūs reaches about 12°C and drops to 9°C overnight. The warmest of the three months is December, the coolest February.
Chālūs weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 12° / 9° | 142 | 15.2 | 0.7 | 9.8 | 2.6 |
| Feb | 11° / 8° | 123 | 14.1 | 1 | 10.6 | 2.5 |
| Mar | 13° / 9° | 100 | 14.1 | 0.1 | 11.7 | 3.3 |
| Apr | 17° / 13° | 68 | 11.3 | 0 | 12.9 | 5.1 |
| May | 21° / 18° | 48 | 9.8 | 0 | 13.9 | 6.6 |
| Jun | 25° / 22° | 49 | 8.5 | 0 | 14.5 | 7.4 |
| Jul | 27° / 24° | 59 | 10.8 | 0 | 14.3 | 6.8 |
| Aug | 27° / 25° | 60 | 11.2 | 0 | 13.4 | 6.6 |
| Sep | 25° / 22° | 148 | 14.6 | 0 | 12.2 | 6.3 |
| Oct | 22° / 19° | 205 | 15.2 | 0 | 11.1 | 5.9 |
| Nov | 17° / 14° | 219 | 15.8 | 0.1 | 10 | 4.7 |
| Dec | 14° / 11° | 156 | 14.8 | 0 | 9.5 | 3.4 |
Cloud cover in Winter
The sky is clear or mostly clear about 26% of the time across winter.
Chance of precipitation in Winter
Chālūs gets around 421 mm of rain and snow over 44 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 42 min in early December to 11 h 06 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 2.5 kWh/m².
Hazard calendar for Chālūs
In winter, Chālūs overlaps 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.
Is winter a good time to visit Chālūs?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Chālūs.
What to pack for Chālūs in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Chālūs sees daytime highs around 12°C and nights near 9°C. Pack a warm layer and rain gear. About 44 days see rain.
Sea temperature near Chālūs in Winter
The nearest coast averages about 13°C across winter — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 12 | 11 | 11 | 14 | 19 | 24 | 27 | 28 | 26 | 23 | 19 | 15 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Warm | Warm | Tropical | Warm | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 12 | Bracing |
| Feb | 11 | Bracing |
| Mar | 11 | Bracing |
| Apr | 14 | Bracing |
| May | 19 | Cool |
| Jun | 24 | Warm |
| Jul | 27 | Warm |
| Aug | 28 | Tropical |
| Sep | 26 | Warm |
| Oct | 23 | Refreshing |
| Nov | 19 | Cool |
| Dec | 15 | Cool |
UV index in Chālūs in Winter
Clear-sky midday UV across winter averages around 3. 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 4 | 4 | 6 | 8 | 8 | 9 | 8 | 6 | 4 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Chālūs in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 42 | 46 | 42 | 36 | 31 | 21 | 15 | 20 | 27 | 30 | 32 | 36 |
| Level | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 42 | Poor |
| Feb | 46 | Poor |
| Mar | 42 | Poor |
| Apr | 36 | Poor |
| May | 31 | Moderate |
| Jun | 21 | Moderate |
| Jul | 15 | Moderate |
| Aug | 20 | Moderate |
| Sep | 27 | Moderate |
| Oct | 30 | Moderate |
| Nov | 32 | Moderate |
| Dec | 36 | Poor |
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.
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
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.