Ust’-Kut weather in May

In May, Ust’-Kut sees average daytime highs of 14°C and overnight lows near 1°C, with 44 mm of precipitation across 11.7 wet days and about 16.1 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 10°C in the first days to 17°C by the end. The sky is clear or mostly clear about 12% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 h 06 min at the start of May to 17 hours by month's end. Set against the rest of the year, May is Ust’-Kut's 5th-clearest and 2nd-windiest month. For the whole year in context, see Ust’-Kut's year-round climate.

Daytime high
14°
4th warmest
Overnight low
8th coldest
Precipitation
44 mm
11.7 wet days
Daylight
16 h 12 min
4:48 AM – 8:58 PM
Cloud cover
72%
5th clearest
Wind
10 km/h
2nd windiest
Solar energy
5.62 kWh/m²
Travel score
3.6
out of 10

Ust’-Kut is human settlement in Ust-Kutsky District, Irkutsk Oblast, Russia.

Density
861/km²
people per km²
Founded
1631

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 10°C in the first days to 17°C by the end.

A typical May day in Ust’-Kut reaches about 14°C in the afternoon and slips back to 1°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 22°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)
19-3
29-2
310-2
410-2
510-2
611-2
711-1
811-1
912-1
10120
11120
12130
13130
14131
15141
16141
17141
18142
19152
20152
21152
22153
23163
24163
25163
26164
27174
28174
29174
30174
31185

How May really feels in Ust’-Kut

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 22 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
22
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’-Kut 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-20° / -28°134.78.67.20.0
Feb-14° / -24°113.879.10.0
Mar-4° / -16°186.28.611.40.0
Apr / -7°289713.90.4
May14° / 4411.72.116.13.6
Jun21° / 5711.8017.46.0
Jul23° / 12°6911.4016.96.6
Aug20° / 7211.3014.96.0
Sep12° / 5111.21.312.52.9
Oct / -6°3710.48.9100.1
Nov-11° / -19°278.611.47.80.0
Dec-18° / -26°186.610.26.60.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22377
32377
42377
52377
62476
72476
82476
92674
102575
112575
122575
132575
142674
152674
162674
172575
182674
192674
202674
212674
222674
232773
242773
252773
262773
272971
282971
293070
303070
313169

Chance of precipitation in May

Any precipitationSnow

Ust’-Kut gets around 44 mm of rain and snow over 11.7 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 38% and peaks near 42% on the wettest days, and about 2 days bring snow. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13416
23415
33515
43514
53513
63612
73612
83611
93610
10369
11368
12368
13367
14367
15366
16376
17375
18375
19385
20384
21394
22393
23403
24403
25412
26412
27422
28422
29421
30421
31421

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
251000
261000
271000
281000
291000
30991
31991

Wind in May

Winds average 10 km/h in May.

Across May, 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 h 06 min at the start of May to 17 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 114 minutes over May. Sunrise moves from 5:21 AM to 4:24 AM, and sunset from 8:27 PM to 9:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.15:218:27
215.25:198:29
315.35:168:31
415.35:148:33
515.45:128:36
615.55:098:38
715.55:078:40
815.65:058:42
915.75:038:44
1015.85:018:46
1115.84:588:48
1215.94:568:50
1316.04:548:52
1416.04:528:54
1516.14:508:56
1616.24:488:58
1716.24:469:00
1816.34:459:02
1916.34:439:04
2016.44:419:05
2116.54:399:07
2216.54:389:09
2316.64:369:11
2416.64:349:13
2516.74:339:14
2616.74:319:16
2716.84:309:18
2816.94:289:19
2916.94:279:21
3016.94:269:23
3117.04:249:24

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.62 kWh/m².

For context, solar energy here swings from a low near 0.45 kWh/m² to a high of 5.9 kWh/m² in June across the year — May's 5.62 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.3Bright
45.3Bright
55.3Bright
65.4Bright
75.4Bright
85.4Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Is May a good time to visit Ust’-Kut?

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

3.6
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’-Kut.

What to pack for Ust’-Kut in May

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

In May, Ust’-Kut sees daytime highs around 14°C and nights near 1°C. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

UV index in Ust’-Kut in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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’-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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 21UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr4Moderate
May5Moderate
Jun6High
Jul5High
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low

Air quality in Ust’-Kut 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’-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).

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodPoorPoorModerateGoodJul 2155 µg/m³Dec 181 µg/m³
PM2.5 (µg/m³)Level
Jan2Good
Feb5Good
Mar5Good
Apr10Good
May11Good
Jun42Poor
Jul56Unhealthy
Aug52Poor
Sep39Poor
Oct16Moderate
Nov3Good
Dec1Good
Location & terrain

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.

3 km
406 m
16 km
492 m
80 km
729 m
treesgrasslandartificial surfacesbare terrainwater
May weather nearby: Zheleznogorsk-Ilimskiy 104 km · Ust’-Ilimsk 230 km · Severobaykal’sk 254 km · Bratsk 267 km · Vikhorevka 293 km · Sayansk 375 km · Chunskiy 386 km · Zima 398 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’-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. 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).