Slyudyanka weather in December

In December, Slyudyanka sees average daytime highs of -12°C and overnight lows near -21°C, with 12 mm of precipitation across 4.3 wet days and about 7.7 hours of daylight. It is the 11th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about -10°C in the first days to -13°C by the end. The sky is clear or mostly clear about 30% of the time in December, and the air most often feels dry.

Daylight stretches from about 7 h 54 min at the start of December to 7 h 36 min by month's end. Set against the rest of the year, December is Slyudyanka's 5th-clearest and 8th-windiest month. For the whole year in context, see Slyudyanka's year-round climate.

Daytime high
-12°
11th warmest
Overnight low
-21°
3rd coldest
Precipitation
12 mm
4.3 wet days
Daylight
7 h 36 min
9:13 AM – 4:49 PM
Cloud cover
61%
5th clearest
Wind
7 km/h
8th windiest
Solar energy
0.92 kWh/m²
Travel score
0.0
out of 10

Slyudyanka is town in Slyudyansky District, Irkutsk Oblast, Russia.

Density
495/km²
people per km²
Founded
1899

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about -10°C in the first days to -13°C by the end.

A typical December day in Slyudyanka reaches about -12°C in the afternoon and slips back to -21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between -19°C and -5°C. Set against its neighbours, December runs about 7°C cooler than November and about 2°C warmer than January.

-30°-20°-10°151015202531
Avg high (°C)Avg low (°C)
1-10-19
2-10-19
3-10-19
4-10-19
5-10-19
6-11-20
7-11-20
8-11-20
9-11-20
10-11-20
11-11-20
12-11-20
13-11-21
14-12-21
15-12-21
16-12-21
17-12-21
18-12-21
19-12-21
20-12-21
21-12-22
22-12-22
23-13-22
24-13-22
25-13-22
26-13-22
27-13-23
28-13-23
29-13-23
30-14-23
31-14-23

How December really feels in Slyudyanka

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 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
31
31 feel bitter (≤ -10°C)

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

Slyudyanka weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-14° / -25°72.74.58.10.0
Feb-10° / -22°82.94.19.60.0
Mar-2° / -15°226.67.711.50.0
Apr / -5°389.98.413.60.9
May14° / 6412.34.315.33.9
Jun19° / 10014.50.216.35.4
Jul21° / 11°13316.3015.95.4
Aug19° / 10°13115.8014.45.3
Sep14° / 8313.42.812.43.6
Oct / -4°358.57.310.40.7
Nov-5° / -14°216.688.60.0
Dec-12° / -21°124.36.17.70.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43961
53862
63862
73961
83862
93961
104060
113961
124060
134159
144258
154357
164357
174456
184555
194555
204654
214753
224753
234753
244852
254852
264852
274852
284852
294852
304951
314951

Chance of precipitation in December

Any precipitationSnow

Slyudyanka gets around 12 mm of rain and snow over 4.3 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 14% and peaks near 16% on the wettest days, and about 6 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
11622
21622
31622
41622
51622
61521
71521
81521
91521
101521
111520
121420
131420
141420
151420
161320
171319
181319
191319
201219
211218
221218
231318
241318
251318
261318
271318
281318
291318
301217
311217

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December 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 (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 7 h 54 min at the start of December to 7 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 8:57 AM to 9:19 AM, and sunset from 4:53 PM to 4:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.98:574:53
27.98:594:52
37.99:004:51
47.89:014:51
57.89:024:51
67.89:044:50
77.89:054:50
87.79:064:50
97.79:074:49
107.79:084:49
117.79:094:49
127.69:104:49
137.69:114:49
147.69:124:49
157.69:134:49
167.69:134:49
177.69:144:49
187.69:154:50
197.69:154:50
207.69:164:50
217.69:174:51
227.69:174:51
237.69:184:52
247.69:184:52
257.69:184:53
267.69:194:53
277.69:194:54
287.69:194:55
297.69:194:56
307.69:194:56
317.69:194:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.92 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.92 kWh/m² to a high of 5.99 kWh/m² in May across the year — December's 0.92 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.0Dim
21.0Dim
31.0Dim
41.0Dim
51.0Dim
61.0Dim
71.0Dim
80.9Dim
90.9Dim
100.9Dim
110.9Dim
120.9Dim
130.9Dim
140.9Dim
150.9Dim
160.9Dim
170.9Dim
180.9Dim
190.9Dim
200.9Dim
210.9Dim
220.9Dim
230.9Dim
240.9Dim
250.9Dim
260.9Dim
270.9Dim
280.9Dim
290.9Dim
301.0Dim
311.0Dim
Planning a trip in December

Hazard calendar for Slyudyanka

In seasonPeak

None of Slyudyanka's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Slyudyanka's rainy season runs May–September, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Slyudyanka?

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

0.0
Sightseeing
8th-best month of the year
0.0
Beach & pool
6th-best month of the year

December is a weaker month for outdoor sightseeing in Slyudyanka.

What to pack for Slyudyanka in December

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

In December, Slyudyanka sees daytime highs around -12°C and nights near -21°C. Pack a warm layer and a heavy coat. About 4 days see rain.

a warm layera heavy coat

UV index in Slyudyanka in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Slyudyanka peaks around July 12 at about 7 (very 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighModerateLowJul 12UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr6High
May6High
Jun7High
Jul7Very high
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low

Air quality in Slyudyanka in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Slyudyanka is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (November, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJul 1317 µg/m³Nov 185 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr12Moderate
May10Good
Jun15Moderate
Jul18Moderate
Aug10Good
Sep6Good
Oct5Good
Nov5Good
Dec5Good
Location & terrain

Where is Slyudyanka?

Slyudyanka sits at 51.7°N, 103.7°E, 477 m above sea level, in Russia. The nearest listed city is Baykal’sk, 34 km away.

Topography around Slyudyanka

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Slyudyanka.

Within 3 km, the terrain around Slyudyanka has significant variations in elevation — a maximum elevation change of 463 m around an average of 534 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,435 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,201 m.

The land around Slyudyanka is covered by trees (50%) and water (34%) within 3 km, trees (74%) and water (22%) within 16 km, and trees (74%) within 80 km.

3 km
463 m
16 km
1,435 m
80 km
2,201 m
treesgrasslandartificial surfaceswatermoss and lichen
December weather nearby: Baykal’sk 34 km · Shelekhov 67 km · Markova 70 km · Irkutsk 81 km · Angarsk 101 km · Usol’ye-Sibirskoye 121 km · Cheremkhovo 171 km · Gusinoozyorsk 198 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 Slyudyanka (51.6621°, 103.71°, elevation 477 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).