Ust’-Ilimsk weather in August

In August, Ust’-Ilimsk sees average daytime highs of 20°C and overnight lows near 11°C, with 57 mm of rain across 9.9 wet days and about 15.1 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 17°C by the end. The sky is clear or mostly clear about 21% of the time in August, and the air most often feels dry.

Daylight stretches from about 16 h 12 min at the start of August to 13 h 54 min by month's end. Set against the rest of the year, August is Ust’-Ilimsk's 3rd-clearest and 10th-windiest month. For the whole year in context, see Ust’-Ilimsk's year-round climate.

Daytime high
20°
3rd warmest
Overnight low
11°
11th coldest
Rainfall
57 mm
9.9 wet days
Daylight
15 h 06 min
5:40 AM – 8:46 PM
Cloud cover
65%
3rd clearest
Wind
10 km/h
10th windiest
Solar energy
4.41 kWh/m²
Travel score
6.2
out of 10

Ust’-Ilimsk is city in Russia.

Density
438/km²
people per km²
Founded
1966

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 17°C by the end.

A typical August day in Ust’-Ilimsk reaches about 20°C in the afternoon and slips back to 11°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 26°C. Set against its neighbours, August runs about 3°C cooler than July and about 9°C warmer than September.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12313
22312
32312
42212
52212
62212
72212
82212
92212
102212
112211
122111
132111
142111
152111
162111
172111
182011
192010
202010
212010
221910
231910
24199
25199
26189
27189
28188
29178
30178
31178

How August really feels in Ust’-Ilimsk

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ust’-Ilimsk weather by month

How August compares with the rest of the year at a glance. August is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-19° / -26°155.19.16.90.0
Feb-14° / -23°124.57.98.90.0
Mar-4° / -14°196.38.711.40.0
Apr / -6°287.86.1140.3
May13° / 4310.61.616.33.5
Jun21° / 10°5610.6017.76.3
Jul24° / 13°6010017.26.8
Aug20° / 11°579.9015.16.2
Sep12° / 52110.912.52.9
Oct / -5°4111.49.19.90.1
Nov-10° / -17°319.712.67.60.0
Dec-18° / -25°227.710.76.30.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34258
44159
54159
64159
74258
84159
94159
104060
114060
123961
133862
143862
153862
163763
173664
183664
193664
203664
213565
223466
233466
243367
253268
263268
273268
283070
293070
303070
312971

Chance of precipitation in August

Any precipitation

Ust’-Ilimsk gets around 57 mm of rain over 9.9 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
133
232
332
432
531
631
731
831
931
1031
1131
1231
1331
1431
1532
1632
1732
1833
1933
2034
2134
2234
2334
2434
2534
2635
2735
2835
2936
3037
3137

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 78% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1612910
2612910
363289
463289
565278
665278
767267
869256
971245
1071245
1173234
1275223
1375223
1476213
1578202
1678202
1780191
1881181
1982171
2084160
2185150
2286140
2387130
2488120
2589110
2690100
279190
289370
299460
309550
319640

Wind in August

Winds average 10 km/h in August.

Across August, 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
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 16 h 12 min at the start of August to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 138 minutes over August. Sunrise moves from 5:08 AM to 6:14 AM, and sunset from 9:23 PM to 8:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.25:089:23
216.25:109:20
316.15:129:18
416.05:149:16
516.05:179:14
615.95:199:11
715.85:219:09
815.75:239:07
915.75:259:04
1015.65:279:02
1115.55:298:59
1215.45:328:57
1315.35:348:54
1415.35:368:52
1515.25:388:49
1615.15:408:46
1715.05:438:44
1814.95:458:41
1914.95:478:39
2014.85:498:36
2114.75:518:33
2214.65:548:30
2314.55:568:28
2414.45:588:25
2514.46:008:22
2614.36:028:19
2714.26:058:17
2814.16:078:14
2914.06:098:11
3013.96:118:08
3113.96:148:05

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.41 kWh/m².

For context, solar energy here swings from a low near 0.36 kWh/m² to a high of 5.98 kWh/m² in June across the year — August's 4.41 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.8Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.6Moderate
313.5Moderate
Planning a trip in August

Is August a good time to visit Ust’-Ilimsk?

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

6.2
Sightseeing
3rd-best month of the year
3.4
Beach & pool
3rd-best month of the year

August is a reasonable time to visit Ust’-Ilimsk for sightseeing.

What to pack for Ust’-Ilimsk in August

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

In August, Ust’-Ilimsk sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Ust’-Ilimsk in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks 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’-Ilimsk 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 21UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5High
Jul5High
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low

Air quality in Ust’-Ilimsk in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Ust’-Ilimsk is worst in July — around 35 µg/m³ PM2.5 (moderate), about 26.7× the cleanest month (December, 1 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1934 µg/m³Dec 212 µg/m³
PM2.5 (µg/m³)Level
Jan3Good
Feb4Good
Mar5Good
Apr9Good
May10Good
Jun27Moderate
Jul35Moderate
Aug30Moderate
Sep19Moderate
Oct29Moderate
Nov7Good
Dec1Good
Location & terrain

Where is Ust’-Ilimsk?

Ust’-Ilimsk sits at 58.0°N, 102.7°E, 278 m above sea level, in Russia. The nearest listed city is Zheleznogorsk-Ilimskiy, 181 km away.

Topography around Ust’-Ilimsk

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ust’-Ilimsk.

Within 3 km, the terrain around Ust’-Ilimsk has only modest variations in elevation — a maximum elevation change of 235 m around an average of 276 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 348 m; within 80 km, large variations in elevation — a maximum elevation change of 627 m.

The land around Ust’-Ilimsk is covered by trees (65%) and water (21%) within 3 km, trees (83%) within 16 km, and trees (93%) within 80 km.

3 km
235 m
16 km
348 m
80 km
627 m
treesgrasslandartificial surfacesbare terrainwater
August weather nearby: Zheleznogorsk-Ilimskiy 181 km · Kodinsk 215 km · Bratsk 217 km · Vikhorevka 227 km · Ust’-Kut 230 km · Chunskiy 280 km · Tayshet 365 km · Tulun 403 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
other Christian 2%

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’-Ilimsk (58.0006°, 102.6619°, elevation 278 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. 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).