Irkutsk in Fall
In fall (September, October and November), Irkutsk sees average daytime highs around 6°C and overnight lows near -3°C, with 97 mm of precipitation over about 20 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 18°C in early September to -9°C by late November. The sky is clear or mostly clear about 26% of the time across fall, and the air most often feels dry.
Fall is Irkutsk's 3rd-best season to visit on our travel score. For the whole year in context, see Irkutsk's year-round climate.
- Avg daytime high
- 6°C
- 3rd-warmest season
- Avg overnight low
- -3°C
- Precipitation
- 97 mm
- 20 wet days
- Avg wind
- 9 km/h
- Travel score
- 1.9
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Irkutsk in Fall
Over the season highs ease from about 18°C in early September to -9°C by late November.
A typical fall day in Irkutsk reaches about 6°C and drops to -3°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Irkutsk
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 64 that feel at or below 0°C.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Irkutsk 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 | -15° / -24° | 5 | 1.8 | 3.3 | 8 | 0.0 |
| Feb | -10° / -21° | 5 | 1.8 | 3.2 | 9.5 | 0.0 |
| Mar | -0° / -13° | 10 | 3.4 | 4.4 | 11.5 | 0.0 |
| Apr | 9° / -3° | 22 | 5.7 | 3.6 | 13.6 | 1.7 |
| May | 16° / 4° | 38 | 8.9 | 1.4 | 15.4 | 5.0 |
| Jun | 21° / 10° | 65 | 10.3 | 0 | 16.4 | 6.4 |
| Jul | 23° / 14° | 94 | 12.2 | 0 | 16 | 6.5 |
| Aug | 21° / 12° | 101 | 11.6 | 0 | 14.5 | 6.3 |
| Sep | 15° / 6° | 61 | 10.2 | 0.6 | 12.4 | 4.6 |
| Oct | 7° / -2° | 23 | 5.7 | 3.9 | 10.3 | 1.1 |
| Nov | -4° / -11° | 13 | 4 | 5.3 | 8.5 | 0.0 |
| Dec | -13° / -20° | 10 | 3.5 | 5.2 | 7.5 | 0.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 26% of the time across fall.
Chance of precipitation in Fall
Irkutsk gets around 97 mm of rain and snow over 20 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 9 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 24 min in early September to 7 h 54 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 2.4 kWh/m².
Is fall a good time to visit Irkutsk?
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 weaker month for outdoor sightseeing in Irkutsk.
What to pack for Irkutsk in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Irkutsk sees daytime highs around 6°C and nights near -3°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 20 days see rain.
UV index in Irkutsk in Fall
Clear-sky midday UV across fall averages around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Irkutsk peaks around July 12 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 2 | 5 | 5 | 6 | 7 | 5 | 4 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | Moderate | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 2 | Moderate |
| Apr | 5 | Moderate |
| May | 5 | High |
| Jun | 6 | High |
| Jul | 7 | High |
| Aug | 5 | Moderate |
| Sep | 4 | Moderate |
| Oct | 2 | Low |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Irkutsk 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 Irkutsk is worst in May — around 22 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 10 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) | 15 | 15 | 13 | 17 | 22 | 16 | 18 | 18 | 11 | 12 | 10 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 15 | Moderate |
| Mar | 13 | Moderate |
| Apr | 17 | Moderate |
| May | 22 | Moderate |
| Jun | 16 | Moderate |
| Jul | 18 | Moderate |
| Aug | 18 | Moderate |
| Sep | 11 | Good |
| Oct | 12 | Good |
| Nov | 10 | Good |
| Dec | 12 | Good |
Where is Irkutsk?
Irkutsk sits at 52.3°N, 104.3°E, 415 m above sea level, in Russia. The nearest listed city is Markova, 11 km away.
Topography around Irkutsk
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Irkutsk.
Within 3 km, the terrain around Irkutsk has only modest variations in elevation — a maximum elevation change of 104 m around an average of 442 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 204 m; within 80 km, large variations in elevation — a maximum elevation change of 1,089 m.
The land around Irkutsk is covered by artificial surfaces (54%) and trees (27%) within 3 km, trees (58%) within 16 km, and trees (69%) within 80 km.
Russia travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 32% of US
- price level, 2025
- GDP per capita
- $17,547
- 2025
- Happiness
- 5.8 / 10
- World Happiness, 2025
- Safe drinking water
- 76%
- of population, 2024
- Homicide rate
- 6.8
- per 100k, 2021
- Road deaths
- 12
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 521
- 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 Irkutsk (52.2957°, 104.2908°, elevation 415 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.