Iisalmi weather in December

In December, Iisalmi sees average daytime highs of -4°C and overnight lows near -8°C, with 51 mm of precipitation across 12.3 wet days and about 4.2 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 -5°C by the end. The sky is clear or mostly clear about 6% of the time in December, and the air most often feels dry.

Daylight stretches from about 4 h 48 min at the start of December to 4 h 06 min by month's end. Set against the rest of the year, December is Iisalmi's 11th-clearest and 1st-windiest month. For the whole year in context, see Iisalmi's year-round climate.

Daytime high
-4°
10th warmest
Overnight low
-8°
3rd coldest
Precipitation
51 mm
12.3 wet days
Daylight
4 hours
10:08 AM – 2:07 PM
Cloud cover
88%
11th clearest
Wind
13 km/h
1st windiest
Solar energy
0.05 kWh/m²
Travel score
0.0
out of 10

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 -5°C by the end.

A typical December day in Iisalmi reaches about -4°C in the afternoon and slips back to -8°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between -12°C and 3°C. Set against its neighbours, December runs about 3°C cooler than November and about 3°C warmer than January.

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

How December really feels in Iisalmi

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.

Iisalmi 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-6° / -11°3910.211.85.20.0
Feb-5° / -12°338.710.180.0
Mar-0° / -8°349.29.811.20.0
Apr / -3°379.14.914.50.8
May14° / 5711.10.817.73.7
Jun18° / 7912.5019.85.4
Jul21° / 12°9313.9018.95.7
Aug19° / 10°7612.40165.5
Sep13° / 6411.20.112.73.3
Oct / 6111.83.49.40.5
Nov-0° / -4°5511.48.26.20.0
Dec-4° / -8°5112.312.24.20.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 5% of December, with mostly cloudy or overcast conditions the remaining 89%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1991
2991
3991
4991
51090
61090
71090
81090
91090
101090
111090
121090
131090
141189
151189
161189
171189
181288
191387
201387
211387
221387
231387
241387
251486
261486
271486
281486
291387
301387
311387

Chance of precipitation in December

Any precipitationSnow

Iisalmi gets around 51 mm of rain and snow over 12.3 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 39% 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 (%)
14137
24137
34138
44138
54138
64138
74139
84139
94139
104139
114039
124039
133938
143938
153938
163838
173839
183839
193839
203839
213839
223839
233839
243739
253739
263739
273739
283739
293639
303638
313638

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

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 4 h 48 min at the start of December to 4 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over December. Sunrise moves from 9:37 AM to 10:12 AM, and sunset from 2:25 PM to 2:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
14.89:372:25
24.79:402:23
34.69:422:21
44.69:452:20
54.59:472:18
64.49:502:16
74.49:522:15
84.39:542:14
94.39:562:12
104.29:582:11
114.210:002:10
124.110:022:09
134.110:032:09
144.110:052:08
154.010:062:08
164.010:082:07
174.010:092:07
183.910:102:07
193.910:112:07
203.910:122:07
213.910:122:07
223.910:132:08
233.910:132:08
243.910:142:09
253.910:142:10
263.910:142:10
274.010:142:12
284.010:132:13
294.010:132:14
304.110:122:15
314.110:122:17

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.05 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.05 kWh/m² to a high of 5.2 kWh/m² in June across the year — December's 0.05 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
70.1Dim
80.1Dim
90.1Dim
100.1Dim
110.1Dim
120.1Dim
130.1Dim
140.1Dim
150.1Dim
160.1Dim
170.1Dim
180.1Dim
190.1Dim
200.1Dim
210.1Dim
220.1Dim
230.1Dim
240.1Dim
250.1Dim
260.1Dim
270.1Dim
280.1Dim
290.1Dim
300.1Dim
310.1Dim
Planning a trip in December

Is December a good time to visit Iisalmi?

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 Iisalmi.

What to pack for Iisalmi in December

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

In December, Iisalmi sees daytime highs around -4°C and nights near -8°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 Iisalmi 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 Iisalmi peaks around July 15 at about 5 (moderate) — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJul 15UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb0Low
Mar1Low
Apr3Moderate
May4Moderate
Jun4Moderate
Jul5Moderate
Aug4Moderate
Sep2Low
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Iisalmi?

Iisalmi sits at 63.6°N, 27.2°E, 108 m above sea level, in Finland. The nearest listed city is Siilinjärvi, 58 km away.

KuopioKajaaniÄänekoskiPieksämäkiLaukaaYlivieskaVarkaus

Topography around Iisalmi

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

Within 3 km, the terrain around Iisalmi has only modest variations in elevation — a maximum elevation change of 57 m around an average of 94 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 153 m; within 80 km, significant variations in elevation — a maximum elevation change of 423 m.

The land around Iisalmi is covered by trees (42%) and water (36%) within 3 km, trees (64%) within 16 km, and trees (78%) within 80 km.

3 km
57 m
16 km
153 m
80 km
423 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Siilinjärvi 58 km · Kuopio 78 km · Kajaani 79 km · Äänekoski 129 km · Pieksämäki 140 km · Laukaa 142 km · Ylivieska 142 km · Varkaus 143 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 Iisalmi (63.5592°, 27.1907°, elevation 108 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).