Ostashkov weather in December

In December, Ostashkov sees average daytime highs of -3°C and overnight lows near -7°C, with 47 mm of precipitation across 11.8 wet days and about 6.5 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about -2°C in the first days to -4°C by the end. The sky is clear or mostly clear about 4% of the time in December, and the air most often feels dry.

Daylight stretches from about 6 h 54 min at the start of December to 6 h 30 min by month's end. Set against the rest of the year, December is Ostashkov's 12th-clearest and 1st-windiest month. For the whole year in context, see Ostashkov's year-round climate.

Daytime high
-3°
10th warmest
Overnight low
-7°
3rd coldest
Precipitation
47 mm
11.8 wet days
Daylight
6 h 24 min
9:31 AM – 3:56 PM
Cloud cover
91%
12th clearest
Wind
15 km/h
1st windiest
Solar energy
0.27 kWh/m²
Travel score
0.0
out of 10

Ostashkov is human settlement in Ostashkovsky District, Tver Oblast, Russia.

Density
1,505/km²
people per km²
Founded
1301

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 -2°C in the first days to -4°C by the end.

A typical December day in Ostashkov reaches about -3°C in the afternoon and slips back to -7°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between -11°C and 3°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer than January.

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

How December really feels in Ostashkov

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.

Ostashkov weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-4° / -9°4511.713.47.10.0
Feb-4° / -9°349.511.190.0
Mar / -5°379.68.611.40.0
Apr / 399.22.513.91.7
May16° / 6812.50.216.24.6
Jun19° / 12°8513.6017.55.5
Jul22° / 14°9214.10175.9
Aug20° / 12°8512.70155.8
Sep14° / 6311.60.112.53.9
Oct / 6912.82.5101.0
Nov / -3°5211.77.67.80.0
Dec-3° / -7°4711.811.96.50.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 2% of December, with mostly cloudy or overcast conditions the remaining 94%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1991
2991
3793
4793
5793
6793
7793
8793
9793
10793
11793
12892
13892
14892
15793
16793
17793
18694
19694
20694
21694
22694
23694
24595
25595
26595
27595
28595
29595
30595
31694

Chance of precipitation in December

Any precipitationSnow

Ostashkov gets around 47 mm of rain and snow over 11.8 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 38% and peaks near 41% on the wettest days, and about 12 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13834
23834
33834
43735
53735
63735
73635
83636
93636
103637
113637
123638
133638
143739
153739
163839
173840
183940
193940
203941
214041
224041
234041
244042
254042
264042
274143
284143
294143
304143
314143

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 15 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 15 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 6 h 54 min at the start of December to 6 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over December. Sunrise moves from 9:12 AM to 9:37 AM, and sunset from 4:03 PM to 4:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
16.99:124:03
26.89:134:02
36.89:154:01
46.79:164:01
56.79:184:00
66.79:193:59
76.69:213:59
86.69:223:58
96.69:243:58
106.59:253:57
116.59:263:57
126.59:273:57
136.59:283:56
146.49:293:56
156.49:303:56
166.49:313:56
176.49:323:56
186.49:333:57
196.49:343:57
206.49:343:57
216.49:353:57
226.49:353:58
236.49:363:58
246.49:363:59
256.49:364:00
266.49:374:00
276.49:374:01
286.49:374:02
296.49:374:03
306.49:374:04
316.59:374:05

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.27 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.27 kWh/m² to a high of 5.23 kWh/m² in June across the year — December's 0.27 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.3Dim
20.3Dim
30.3Dim
40.3Dim
50.3Dim
60.3Dim
70.3Dim
80.3Dim
90.3Dim
100.3Dim
110.3Dim
120.3Dim
130.3Dim
140.3Dim
150.3Dim
160.3Dim
170.3Dim
180.3Dim
190.3Dim
200.3Dim
210.3Dim
220.3Dim
230.3Dim
240.3Dim
250.3Dim
260.3Dim
270.3Dim
280.3Dim
290.3Dim
300.3Dim
310.3Dim
Planning a trip in December

Is December a good time to visit Ostashkov?

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
7th-best month of the year

December is a weaker month for outdoor sightseeing in Ostashkov.

What to pack for Ostashkov in December

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

In December, Ostashkov sees daytime highs around -3°C and nights near -7°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 12 days see rain.

a warm layera heavy coatrain gear

UV index in Ostashkov in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 0. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ostashkov peaks around July 11 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 11UV 6Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May4Moderate
Jun6High
Jul6High
Aug4Moderate
Sep3Moderate
Oct1Low
Nov1Low
Dec0Low
Location & terrain

Where is Ostashkov?

Ostashkov sits at 57.1°N, 33.1°E, 210 m above sea level, in Russia. The nearest listed city is Valday, 93 km away.

Topography around Ostashkov

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

Within 3 km, the terrain around Ostashkov has only modest variations in elevation — a maximum elevation change of 23 m around an average of 208 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 87 m; within 80 km, significant variations in elevation — a maximum elevation change of 335 m.

The land around Ostashkov is covered by water (44%) and trees (26%) within 3 km, trees (64%) within 16 km, and trees (85%) within 80 km.

3 km
23 m
16 km
87 m
80 km
335 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Valday 93 km · Bologoye 100 km · Vyshniy Volochëk 100 km · Nelidovo 104 km · Torzhok 113 km · Rzhev 123 km · Udomlya 139 km · Staraya Russa 141 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 Ostashkov (57.1469°, 33.1066°, elevation 210 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).