Ust’-Kut in Summer
In summer (June, July and August), Ust’-Kut sees average daytime highs around 22°C and overnight lows near 10°C, with 197 mm of rain over about 35 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 22°C. The sky is clear or mostly clear about 19% of the time across summer, and the air most often feels dry.
Summer is Ust’-Kut's best season of the year to visit on our travel score. For the whole year in context, see Ust’-Kut's year-round climate.
- Avg daytime high
- 22°C
- warmest season of the year
- Avg overnight low
- 10°C
- Rainfall
- 197 mm
- 35 wet days
- Avg wind
- 7 km/h
- Travel score
- 6.2
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Ust’-Kut in Summer
Across summer, daytime highs hold fairly steady around 22°C.
A typical summer day in Ust’-Kut reaches about 22°C and drops to 10°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Ust’-Kut
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Ust’-Kut weather by month
How the three summer months (June, July and August) 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 | -20° / -28° | 13 | 4.7 | 8.6 | 7.2 | 0.0 |
| Feb | -14° / -24° | 11 | 3.8 | 7 | 9.1 | 0.0 |
| Mar | -4° / -16° | 18 | 6.2 | 8.6 | 11.4 | 0.0 |
| Apr | 5° / -7° | 28 | 9 | 7 | 13.9 | 0.4 |
| May | 14° / 1° | 44 | 11.7 | 2.1 | 16.1 | 3.6 |
| Jun | 21° / 9° | 57 | 11.8 | 0 | 17.4 | 6.0 |
| Jul | 23° / 12° | 69 | 11.4 | 0 | 16.9 | 6.6 |
| Aug | 20° / 9° | 72 | 11.3 | 0 | 14.9 | 6.0 |
| Sep | 12° / 2° | 51 | 11.2 | 1.3 | 12.5 | 2.9 |
| Oct | 2° / -6° | 37 | 10.4 | 8.9 | 10 | 0.1 |
| Nov | -11° / -19° | 27 | 8.6 | 11.4 | 7.8 | 0.0 |
| Dec | -18° / -26° | 18 | 6.6 | 10.2 | 6.6 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 19% of the time across summer.
Chance of precipitation in Summer
Ust’-Kut gets around 197 mm of rain over 35 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 7 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 17 hours in early June to 13 h 48 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.3 kWh/m².
Is summer a good time to visit Ust’-Kut?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Ust’-Kut for sightseeing.
What to pack for Ust’-Kut in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Ust’-Kut sees daytime highs around 22°C and nights near 10°C. Worth packing: light clothes, rain gear and sun protection. About 35 days see rain.
UV index in Ust’-Kut in Summer
Clear-sky midday UV across summer averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ust’-Kut peaks around June 21 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 5 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 1 | 2 | 4 | 5 | 6 | 5 | 5 | 3 | 1 | 0 | 0 |
| Level | Low | Low | Low | Moderate | Moderate | High | High | Moderate | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 1 | Low |
| Mar | 2 | Low |
| Apr | 4 | Moderate |
| May | 5 | Moderate |
| Jun | 6 | High |
| Jul | 5 | High |
| Aug | 5 | Moderate |
| Sep | 3 | Moderate |
| Oct | 1 | Low |
| Nov | 0 | Low |
| Dec | 0 | Low |
Air quality in Ust’-Kut in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Ust’-Kut is worst in July — around 56 µg/m³ PM2.5 (unhealthy), about 46.8× the cleanest month (December, 1 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) | 2 | 5 | 5 | 10 | 11 | 42 | 56 | 52 | 39 | 16 | 3 | 1 |
| Level | Good | Good | Good | Good | Good | Poor | Unhealthy | Poor | Poor | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 2 | Good |
| Feb | 5 | Good |
| Mar | 5 | Good |
| Apr | 10 | Good |
| May | 11 | Good |
| Jun | 42 | Poor |
| Jul | 56 | Unhealthy |
| Aug | 52 | Poor |
| Sep | 39 | Poor |
| Oct | 16 | Moderate |
| Nov | 3 | Good |
| Dec | 1 | Good |
Where is Ust’-Kut?
Ust’-Kut sits at 56.8°N, 105.8°E, 285 m above sea level, in Russia. The nearest listed city is Zheleznogorsk-Ilimskiy, 104 km away.
Topography around Ust’-Kut
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ust’-Kut.
Within 3 km, the terrain around Ust’-Kut has significant variations in elevation — a maximum elevation change of 406 m around an average of 412 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 492 m; within 80 km, large variations in elevation — a maximum elevation change of 729 m.
The land around Ust’-Kut is covered by trees (72%) and artificial surfaces (21%) within 3 km, trees (93%) within 16 km, and trees (99%) 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 Ust’-Kut (56.7979°, 105.7866°, elevation 285 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.