Pori weather in January

In January, Pori sees average daytime highs of -1°C and overnight lows near -5°C, with 43 mm of precipitation across 10.2 wet days and about 6 hours of daylight. It is the 11th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near -1°C through the month. The sky is clear or mostly clear about 10% of the time in January, and the air most often feels dry.

Daylight stretches from about 5 h 06 min at the start of January to 7 h 06 min by month's end. Set against the rest of the year, January is Pori's 11th-clearest and 2nd-windiest month. For the whole year in context, see Pori's year-round climate.

Daytime high
-1°
11th warmest
Overnight low
-5°
2nd coldest
Precipitation
43 mm
10.2 wet days
Daylight
5 h 54 min
9:46 AM – 3:39 PM
Cloud cover
80%
11th clearest
Wind
19 km/h
2nd windiest
Solar energy
0.24 kWh/m²
Travel score
0.0
out of 10
Air quality
Excellent
PM10 12.2 µg/m³ · 2019

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near -1°C through the month.

A typical January day in Pori reaches about -1°C in the afternoon and slips back to -5°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between -8°C and 4°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

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

How January really feels in Pori

Once humidity and wind are folded in, January 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 January is cold — wind chill drags the overnight "feels like" below the raw low.

Pori weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -5°4310.28.560.0
Feb-2° / -6°3487.68.40.0
Mar / -4°338.3611.30.0
Apr / 338.2214.30.8
May12° / 397.80.217.13.3
Jun16° / 10°6010.3018.95.0
Jul20° / 13°7411.7018.16.0
Aug19° / 13°7412.2015.65.7
Sep14° / 6210.2012.64.1
Oct / 6511.50.99.61.3
Nov / 5611.13.76.80.0
Dec / -3°5311.56.85.10.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 9% of January, with mostly cloudy or overcast conditions the remaining 80%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
21981
31981
41981
51981
61981
71981
81981
91981
102080
112080
122080
132080
142080
152080
162080
172080
181981
191882
201981
211981
221981
231981
241981
251981
262080
272080
282080
292080
302179
312179

Chance of precipitation in January

Any precipitationSnow

Pori gets around 43 mm of rain and snow over 10.2 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 34% and peaks near 37% on the wettest days, and about 9 days bring snow. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13626
23627
33627
43728
53728
63728
73728
83728
93727
103727
113727
123726
133626
143626
153526
163425
173425
183325
193225
203126
213126
223026
233027
243028
252928
262929
273030
283030
293030
303031
313031

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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 January

Winds average 19 km/h in January.

Across January, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 5 h 06 min at the start of January to 7 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 120 minutes over January. Sunrise moves from 10:03 AM to 9:14 AM, and sunset from 3:09 PM to 4:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
15.110:033:09
25.110:023:11
35.210:023:12
45.210:013:14
55.310:003:16
65.39:593:17
75.49:583:19
85.49:573:21
95.59:563:23
105.59:553:25
115.69:533:27
125.69:523:29
135.79:503:32
145.89:493:34
155.89:473:36
165.99:463:39
176.09:443:41
186.09:423:44
196.19:403:46
206.29:383:49
216.29:363:51
226.39:343:54
236.49:323:56
246.59:303:59
256.69:284:02
266.69:264:04
276.79:244:07
286.89:214:10
296.99:194:13
307.09:174:15
317.19:144:18

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.24 kWh/m².

For context, solar energy here swings from a low near 0.12 kWh/m² to a high of 5.97 kWh/m² in June across the year — January's 0.24 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.1Dim
20.1Dim
30.1Dim
40.1Dim
50.1Dim
60.1Dim
70.2Dim
80.2Dim
90.2Dim
100.2Dim
110.2Dim
120.2Dim
130.2Dim
140.2Dim
150.2Dim
160.2Dim
170.2Dim
180.3Dim
190.3Dim
200.3Dim
210.3Dim
220.3Dim
230.3Dim
240.3Dim
250.3Dim
260.4Dim
270.4Dim
280.4Dim
290.4Dim
300.4Dim
310.5Dim
Planning a trip in January

Is January a good time to visit Pori?

Our two travel scores rate January 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

January is a weaker month for outdoor sightseeing in Pori.

What to pack for Pori in January

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

In January, Pori sees daytime highs around -1°C and nights near -5°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Pori in January

The nearest coast averages about 2°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 25 km away) 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
May5Bracing
Jun10Bracing
Jul15Cool
Aug17Cool
Sep14Bracing
Oct10Bracing
Nov7Bracing
Dec4Bracing

UV index in Pori in January

LowModerateHighVery highExtreme

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

Under clear skies, the midday UV index in Pori peaks around June 16 at about 5 (moderate) — 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 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJun 16UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar1Low
Apr2Moderate
May4Moderate
Jun5Moderate
Jul4Moderate
Aug4Moderate
Sep2Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Pori?

Pori sits at 61.5°N, 21.8°E, 20 m above sea level, in Finland. The nearest listed city is Rauma, 42 km away.

NokiaYlöjärviLoimaaPirkkalaLempäälä

Topography around Pori

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

Within 3 km, the terrain around Pori has only modest variations in elevation — a maximum elevation change of 35 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 74 m; within 80 km, significant variations in elevation — a maximum elevation change of 253 m.

The land around Pori is covered by trees (39%) and artificial surfaces (33%) within 3 km, trees (62%) within 16 km, and trees (61%) and water (25%) within 80 km.

3 km
35 m
16 km
74 m
80 km
253 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Rauma 42 km · Vammala 62 km · Sastamala 62 km · Nokia 91 km · Ylöjärvi 96 km · Loimaa 98 km · Pirkkala 98 km · Lempäälä 106 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 Pori (61.4807°, 21.7852°, elevation 20 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).