Ust’-Ilimsk weather in May

In May, Ust’-Ilimsk sees average daytime highs of 13°C and overnight lows near 2°C, with 43 mm of precipitation across 10.6 wet days and about 16.3 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 9°C in the first days to 17°C by the end. The sky is clear or mostly clear about 10% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 h 18 min at the start of May to 17 h 18 min by month's end. Set against the rest of the year, May is Ust’-Ilimsk's 5th-clearest and 4th-windiest month. For the whole year in context, see Ust’-Ilimsk's year-round climate.

Daytime high
13°
4th warmest
Overnight low
8th coldest
Precipitation
43 mm
10.6 wet days
Daylight
16 h 24 min
4:54 AM – 9:17 PM
Cloud cover
73%
5th clearest
Wind
12 km/h
4th windiest
Solar energy
5.54 kWh/m²
Travel score
3.5
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 9°C in the first days to 17°C by the end.

A typical May day in Ust’-Ilimsk reaches about 13°C in the afternoon and slips back to 2°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 21°C. Set against its neighbours, May runs about 9°C warmer than April and about 8°C cooler than June.

-10°10°20°151015202531
Avg high (°C)Avg low (°C)
19-1
29-1
39-1
410-1
5100
6100
7110
8110
9111
10121
11121
12121
13132
14132
15132
16132
17143
18143
19143
20143
21154
22154
23154
24154
25165
26165
27165
28175
29176
30176
31176

How May really feels in Ust’-Ilimsk

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 19 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
19
wind chill below the day's low

The story in May is cold — wind chill drags the overnight "feels like" below the raw low.

Ust’-Ilimsk weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 5th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22278
32278
42377
52377
62377
72476
82476
92476
102476
112575
122575
132575
142575
152575
162575
172674
182773
192773
202773
212773
222773
232872
242872
252872
262971
272971
282971
293070
303169
313268

Chance of precipitation in May

Any precipitationSnow

Ust’-Ilimsk gets around 43 mm of rain and snow over 10.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 35% and peaks near 39% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13314
23313
33413
43412
53511
63511
73510
8359
9348
10348
11347
12336
13336
14335
15334
16334
17334
18333
19333
20332
21332
22342
23342
24351
25361
26371
27371
28381
29381
30390
31390

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
25991
26991
27991
28991
29991
30991
31982

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 h 18 min at the start of May to 17 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 120 minutes over May. Sunrise moves from 5:29 AM to 4:28 AM, and sunset from 8:44 PM to 9:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.35:298:44
215.35:268:47
315.45:248:49
415.55:218:51
515.65:198:53
615.75:168:55
715.75:148:58
815.85:129:00
915.95:099:02
1016.05:079:04
1116.05:059:06
1216.15:039:09
1316.25:019:11
1416.24:589:13
1516.34:569:15
1616.44:549:17
1716.44:529:19
1816.54:509:21
1916.64:489:23
2016.64:469:25
2116.74:449:27
2216.84:439:29
2316.84:419:31
2416.94:399:33
2517.04:379:35
2617.04:369:36
2717.14:349:38
2817.14:339:40
2917.24:319:42
3017.24:309:43
3117.34:289:45

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.54 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 — May's 5.54 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.2Bright
45.2Bright
55.2Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.4Bright
115.4Bright
125.4Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

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

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

3.5
Sightseeing
4th-best month of the year
0.3
Beach & pool
4th-best month of the year

May is a weaker month for outdoor sightseeing in Ust’-Ilimsk.

What to pack for Ust’-Ilimsk in May

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

In May, Ust’-Ilimsk sees daytime highs around 13°C and nights near 2°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

UV index in Ust’-Ilimsk in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks 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 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).