Olari weather in December

In December, Olari sees average daytime highs of 0°C and overnight lows near -4°C, with 57 mm of precipitation across 12.4 wet days and about 5.6 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 1°C in the first days to -1°C by the end. The sky is clear or mostly clear about 10% of the time in December, and the air most often feels dry.

Daylight stretches from about 6 h 06 min at the start of December to 5 h 36 min by month's end. Set against the rest of the year, December is Olari's 10th-clearest and 1st-windiest month. For the whole year in context, see Olari's year-round climate.

Daytime high
10th warmest
Overnight low
-4°
4th coldest
Precipitation
57 mm
12.4 wet days
Daylight
5 h 30 min
9:32 AM – 3:02 PM
Cloud cover
82%
10th clearest
Wind
17 km/h
1st windiest
Solar energy
0.16 kWh/m²
Travel score
0.0
out of 10

Olari is city district in Espoo, Finland.

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 1°C in the first days to -1°C by the end.

A typical December day in Olari reaches about 0°C in the afternoon and slips back to -4°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between -6°C and 5°C. Set against its neighbours, December runs about 3°C cooler than November and about 2°C warmer than January.

-20°-10°10°151015202531
Avg high (°C)Avg low (°C)
12-2
22-2
31-2
41-2
51-2
61-2
71-2
81-2
91-2
101-3
111-3
121-3
131-3
140-3
150-3
160-3
170-4
180-4
190-4
200-4
210-4
22-1-4
23-1-5
24-1-5
25-1-5
26-1-5
27-1-5
28-1-5
29-1-5
30-1-5
31-1-5

How December really feels in Olari

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
11 feel bitter (≤ -10°C)

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

Olari weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -6°5011.110.26.40.0
Feb-2° / -7°418.98.88.60.0
Mar / -5°378.26.911.30.0
Apr / 378.82.414.21.2
May14° / 438.70.216.84.1
Jun18° / 10°6611.4018.45.5
Jul21° / 13°6911.2017.76.3
Aug20° / 12°7012.2015.45.9
Sep15° / 5510.1012.64.3
Oct / 5910.90.79.71.5
Nov / -0°5911.64.77.10.0
Dec / -4°5712.48.75.60.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 7% of December, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11585
21585
31585
41684
51585
61585
71585
81585
91585
101684
111684
121783
131783
141783
151783
161882
171882
181882
191981
201981
212179
222179
232179
242179
252179
262179
272179
282080
292080
302080
312080

Chance of precipitation in December

Any precipitationSnow

Olari gets around 57 mm of rain and snow over 12.4 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 39% and peaks near 40% on the wettest days, and about 9 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
14022
24022
34023
44023
54023
64024
74024
84025
94025
104026
114026
124027
133927
143928
153928
163929
173929
183929
193930
203930
213931
223931
233931
243932
253932
263932
273932
283932
293933
303933
313933

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

Across December, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 6 h 06 min at the start of December to 5 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over December. Sunrise moves from 9:09 AM to 9:37 AM, and sunset from 3:12 PM to 3:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
16.19:093:12
26.09:113:11
36.09:133:10
45.99:153:09
55.99:173:08
65.89:193:07
75.89:203:06
85.79:223:06
95.79:233:05
105.79:253:04
115.69:263:04
125.69:283:03
135.69:293:03
145.59:303:03
155.59:313:02
165.59:323:02
175.59:333:02
185.59:343:02
195.59:353:03
205.59:353:03
215.59:363:03
225.49:373:04
235.59:373:04
245.59:373:05
255.59:383:05
265.59:383:06
275.59:383:07
285.59:383:08
295.59:383:09
305.59:383:10
315.69:373:11

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.16 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.16 kWh/m² to a high of 5.79 kWh/m² in June across the year — December's 0.16 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.2Dim
20.2Dim
30.2Dim
40.2Dim
50.2Dim
60.2Dim
70.2Dim
80.2Dim
90.2Dim
100.2Dim
110.2Dim
120.2Dim
130.2Dim
140.2Dim
150.2Dim
160.1Dim
170.1Dim
180.1Dim
190.1Dim
200.1Dim
210.1Dim
220.2Dim
230.2Dim
240.2Dim
250.2Dim
260.2Dim
270.2Dim
280.2Dim
290.2Dim
300.2Dim
310.2Dim
Planning a trip in December

Is December a good time to visit Olari?

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 Olari.

What to pack for Olari in December

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

In December, Olari sees daytime highs around 0°C and nights near -4°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 12 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Olari in December

The nearest coast averages about 4°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 17°C and coldest in March near 1°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan2Bracing
Feb1Bracing
Mar1Bracing
Apr2Bracing
May6Bracing
Jun11Bracing
Jul16Cool
Aug17Cool
Sep14Bracing
Oct10Bracing
Nov7Bracing
Dec4Bracing

UV index in Olari 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 Olari peaks around June 18 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 18UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5High
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Olari?

Olari sits at 60.2°N, 24.7°E, 25 m above sea level, in Finland. The nearest listed city is Matinkylä, 2.0 km away.

Topography around Olari

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

Within 3 km, the terrain around Olari has only modest variations in elevation — a maximum elevation change of 53 m around an average of 18 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 111 m; within 80 km, only modest variations in elevation — a maximum elevation change of 193 m.

The land around Olari is covered by trees (58%) and artificial surfaces (31%) within 3 km, trees (44%) and water (35%) within 16 km, and water (47%) and trees (42%) within 80 km.

3 km
53 m
16 km
111 m
80 km
193 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Matinkylä 2.0 km · Espoonlahti 5.0 km · Espoo 6.0 km · Leppävaara 7.0 km · Lauttasaari 8.0 km · Munkkiniemi 9.0 km · Pitäjänmäki 9.0 km · Taka-Töölö 11 km

Finland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 85% of US
price level, 2025
GDP per capita
$56,149
2025
Happiness
7.8 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1
per 100k, 2023
Road deaths
3.9
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 603
Religion
Lutheran 67%none 31%other 2%Greek Orthodox 1%

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 Olari (60.1724°, 24.7271°, elevation 25 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).