Chālūs in Fall
In fall (September, October and November), Chālūs sees average daytime highs around 21°C and overnight lows near 18°C, with 571 mm of rain over about 46 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Over the season highs ease from about 26°C in early September to 15°C by late November. The sky is clear or mostly clear about 35% of the time across fall, and the air most often feels humid.
Fall is Chālūs's 2nd-best season to visit on our travel score. For the whole year in context, see Chālūs's year-round climate.
- Avg daytime high
- 21°C
- 2nd-warmest season
- Avg overnight low
- 18°C
- Rainfall
- 571 mm
- 46 wet days
- Avg wind
- 10 km/h
- Travel score
- 5.6
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Chālūs in Fall
Over the season highs ease from about 26°C in early September to 15°C by late November.
A typical fall day in Chālūs reaches about 21°C and drops to 18°C overnight. The warmest of the three months is September, the coolest November.
Chālūs weather by month
How the three fall months (September, October and November) 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 Fall
The sky is clear or mostly clear about 35% of the time across fall.
Chance of precipitation in Fall
Chālūs gets around 571 mm of rain over 46 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 10 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 48 min in early September to 9 h 42 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.4 kWh/m².
Hazard calendar for Chālūs
In fall, 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 fall a good time to visit Chālūs?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Chālūs for sightseeing.
What to pack for Chālūs in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Chālūs sees daytime highs around 21°C and nights near 18°C. Pack rain gear. Worth having: light clothes. About 46 days see rain.
Sea temperature near Chālūs in Fall
The nearest coast averages about 23°C across fall — 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 Fall
Clear-sky midday UV across fall averages around 4 — enough to warrant sun protection. 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 Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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.