Heinola weather in April

In April, Heinola sees average daytime highs of 7°C and overnight lows near -1°C, with 34 mm of precipitation across 8.6 wet days and about 14.3 hours of daylight. It is the 7th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 4°C in the first days to 10°C by the end. The sky is clear or mostly clear about 20% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of April to 15 h 36 min by month's end. Set against the rest of the year, April is Heinola's 4th-clearest and 8th-windiest month. For the whole year in context, see Heinola's year-round climate.

Daytime high: 7°; 7th warmest
Overnight low: -1°; 6th coldest
Precipitation: 34 mm; 8.6 wet days
Daylight: 14 h 18 min; 5:07 AM – 7:26 PM
Cloud cover: 69%; 4th clearest
Wind: 11 km/h; 8th windiest
Solar energy: 3.76 kWh/m²
Travel score: 1.0; out of 10

← March Heinola year-round climate May →Best places to visit in April

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 4°C in the first days to 10°C by the end.

A typical April day in Heinola reaches about 7°C in the afternoon and slips back to -1°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 2°C and 12°C. Set against its neighbours, April runs about 6°C warmer than March and about 7°C cooler than May.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	4	4	4	4	5	5	5	5	5	6	6	6	6	6	7	7	7	7	8	8	8	9	9	9	9	10	10	10	10	11
Avg low (°C)	-3	-3	-3	-3	-3	-2	-2	-2	-2	-2	-1	-1	-1	-1	-1	-1	0	0	0	0	0	0	1	1	1	1	1	2	2	2

	Avg high (°C)	Avg low (°C)
1	4	-3
2	4	-3
3	4	-3
4	4	-3
5	5	-3
6	5	-2
7	5	-2
8	5	-2
9	5	-2
10	6	-2
11	6	-1
12	6	-1
13	6	-1
14	6	-1
15	7	-1
16	7	-1
17	7	0
18	7	0
19	8	0
20	8	0
21	8	0
22	9	0
23	9	1
24	9	1
25	9	1
26	10	1
27	10	1
28	10	2
29	10	2
30	11	2

How April really feels in Heinola

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 30 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Heinola weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-4° / -8°	39	10.2	10.8	6	0.0
Feb	-4° / -9°	32	8.1	8.9	8.5	0.0
Mar	1° / -6°	31	8.4	8.1	11.3	0.0
Apr	7° / -1°	34	8.6	3.6	14.3	1.0
May	14° / 5°	46	9.5	0.2	17	3.9
Jun	18° / 10°	73	12.1	0	18.8	5.3
Jul	21° / 13°	76	12.2	0	18	6.0
Aug	19° / 12°	70	12.2	0	15.5	5.7
Sep	14° / 8°	51	10.2	0	12.6	3.9
Oct	7° / 3°	57	11	1.6	9.6	0.9
Nov	2° / -1°	48	10.5	5.5	6.9	0.0
Dec	-2° / -5°	46	11.4	9.8	5.2	0.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 66%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	35	35	35	33	33	33	32	32	31	31	30	30	30	30	31	31	33	33	33	34	34	36	36	36	36	38	39	38	39	39
Cloudier (%)	65	65	65	67	67	67	68	68	69	69	70	70	70	70	69	69	67	67	67	66	66	64	64	64	64	62	61	62	61	61

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	35	65
4	33	67
5	33	67
6	33	67
7	32	68
8	32	68
9	31	69
10	31	69
11	30	70
12	30	70
13	30	70
14	30	70
15	31	69
16	31	69
17	33	67
18	33	67
19	33	67
20	34	66
21	34	66
22	36	64
23	36	64
24	36	64
25	36	64
26	38	62
27	39	61
28	38	62
29	39	61
30	39	61

Chance of precipitation in April

Any precipitationSnow

Heinola gets around 34 mm of rain and snow over 8.6 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 28% and peaks near 30% on the wettest days, and about 4 days bring snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	28	28	29	29	29	29	29	30	30	30	30	30	29	29	29	29	28	28	28	28	28	28	27	27	27	27	27	27	27	27
Snow chance (%)	21	20	20	19	18	18	17	16	16	15	15	14	14	14	13	13	12	11	11	10	9	9	8	7	7	6	5	5	4	4

	Rain chance (%)	Snow chance (%)
1	28	21
2	28	20
3	29	20
4	29	19
5	29	18
6	29	18
7	29	17
8	30	16
9	30	16
10	30	15
11	30	15
12	30	14
13	29	14
14	29	14
15	29	13
16	29	13
17	28	12
18	28	11
19	28	11
20	28	10
21	28	9
22	28	9
23	27	8
24	27	7
25	27	7
26	27	6
27	27	5
28	27	5
29	27	4
30	27	4

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in April

Winds average 11 km/h in April.

Across April, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	12	12	12	12	12	12	12	12	12	12	12	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	12	calm
2	12	calm
3	12	calm
4	12	calm
5	12	calm
6	12	calm
7	12	calm
8	12	calm
9	12	calm
10	12	calm
11	12	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	11	calm
18	11	calm
19	11	calm
20	11	calm
21	11	calm
22	11	calm
23	11	calm
24	11	calm
25	11	calm
26	11	calm
27	11	calm
28	11	calm
29	11	calm
30	11	calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 54 min at the start of April to 15 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 162 minutes over April. Sunrise moves from 5:55 AM to 4:24 AM, and sunset from 6:46 PM to 8:03 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.9	13.0	13.1	13.1	13.2	13.3	13.4	13.5	13.6	13.7	13.8	13.9	14.0	14.1	14.2	14.3	14.4	14.5	14.6	14.7	14.8	14.9	15.0	15.1	15.2	15.3	15.4	15.5	15.6	15.6
Sunrise (AM)	5:55	5:52	5:48	5:45	5:42	5:39	5:35	5:32	5:29	5:26	5:23	5:19	5:16	5:13	5:10	5:07	5:03	5:00	4:57	4:54	4:51	4:48	4:45	4:42	4:39	4:36	4:33	4:30	4:27	4:24
Sunset (PM)	6:46	6:49	6:51	6:54	6:57	6:59	7:02	7:05	7:07	7:10	7:12	7:15	7:18	7:20	7:23	7:26	7:28	7:31	7:33	7:36	7:39	7:41	7:44	7:47	7:49	7:52	7:55	7:57	8:00	8:03

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.9	5:55	6:46
2	13.0	5:52	6:49
3	13.1	5:48	6:51
4	13.1	5:45	6:54
5	13.2	5:42	6:57
6	13.3	5:39	6:59
7	13.4	5:35	7:02
8	13.5	5:32	7:05
9	13.6	5:29	7:07
10	13.7	5:26	7:10
11	13.8	5:23	7:12
12	13.9	5:19	7:15
13	14.0	5:16	7:18
14	14.1	5:13	7:20
15	14.2	5:10	7:23
16	14.3	5:07	7:26
17	14.4	5:03	7:28
18	14.5	5:00	7:31
19	14.6	4:57	7:33
20	14.7	4:54	7:36
21	14.8	4:51	7:39
22	14.9	4:48	7:41
23	15.0	4:45	7:44
24	15.1	4:42	7:47
25	15.2	4:39	7:49
26	15.3	4:36	7:52
27	15.4	4:33	7:55
28	15.5	4:30	7:57
29	15.6	4:27	8:00
30	15.6	4:24	8:03

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 3.76 kWh/m².

For context, solar energy here swings from a low near 0.11 kWh/m² to a high of 5.25 kWh/m² in June across the year — April's 3.76 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	3.0	3.1	3.1	3.2	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.6	3.6	3.7	3.7	3.8	3.8	3.9	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.4	4.4	4.5	4.5
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.0	Moderate
2	3.1	Moderate
3	3.1	Moderate
4	3.2	Moderate
5	3.2	Moderate
6	3.3	Moderate
7	3.3	Moderate
8	3.4	Moderate
9	3.4	Moderate
10	3.5	Moderate
11	3.5	Moderate
12	3.6	Moderate
13	3.6	Moderate
14	3.7	Moderate
15	3.7	Moderate
16	3.8	Moderate
17	3.8	Moderate
18	3.9	Moderate
19	4.0	Moderate
20	4.0	Bright
21	4.1	Bright
22	4.1	Bright
23	4.2	Bright
24	4.2	Bright
25	4.3	Bright
26	4.3	Bright
27	4.4	Bright
28	4.4	Bright
29	4.5	Bright
30	4.5	Bright

Planning a trip in April

Is April a good time to visit Heinola?

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

1.0

Sightseeing

6th-best month of the year

0.0

Beach & pool

6th-best month of the year

April is a weaker month for outdoor sightseeing in Heinola.

What to pack for Heinola in April

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

In April, Heinola sees daytime highs around 7°C and nights near -1°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

UV index in Heinola in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Heinola peaks around June 20 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	0	1	2	3	4	5	5	4	2	1	0	0
Level	Low	Low	Low	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	0	Low
Feb	1	Low
Mar	2	Low
Apr	3	Moderate
May	4	Moderate
Jun	5	Moderate
Jul	5	Moderate
Aug	4	Moderate
Sep	2	Moderate
Oct	1	Low
Nov	0	Low
Dec	0	Low

Location & terrain

Where is Heinola?

Heinola sits at 61.2°N, 26.0°E, 104 m above sea level, in Finland. The nearest listed city is Lahti, 32 km away.

Topography around Heinola

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

Within 3 km, the terrain around Heinola has only modest variations in elevation — a maximum elevation change of 96 m around an average of 98 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 102 m; within 80 km, only modest variations in elevation — a maximum elevation change of 247 m.

The land around Heinola is covered by trees (65%) within 3 km, trees (71%) and water (20%) within 16 km, and trees (72%) within 80 km.

3 km

96 m

trees 65%

16 km

102 m

trees 71%

80 km

247 m

trees 72%

treesgrasslandcroplandartificial surfaceswater

← March Heinola year-round climate May →Best places to visit in April

April weather nearby: Lahti 32 km · Hollola 37 km · Orimattila 48 km · Kouvola 52 km · Anjala 72 km · Mäntsälä 75 km · Janakkala 85 km · Mikkeli 85 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

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 Heinola (61.2056°, 26.0381°, elevation 104 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).

	Avg high (°C)	Avg low (°C)
1	4	-3
2	4	-3
3	4	-3
4	4	-3
5	5	-3
6	5	-2
7	5	-2
8	5	-2
9	5	-2
10	6	-2
11	6	-1
12	6	-1
13	6	-1
14	6	-1
15	7	-1
16	7	-1
17	7	0
18	7	0
19	8	0
20	8	0
21	8	0
22	9	0
23	9	1
24	9	1
25	9	1
26	10	1
27	10	1
28	10	2
29	10	2
30	11	2

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	35	65
4	33	67
5	33	67
6	33	67
7	32	68
8	32	68
9	31	69
10	31	69
11	30	70
12	30	70
13	30	70
14	30	70
15	31	69
16	31	69
17	33	67
18	33	67
19	33	67
20	34	66
21	34	66
22	36	64
23	36	64
24	36	64
25	36	64
26	38	62
27	39	61
28	38	62
29	39	61
30	39	61

	Rain chance (%)	Snow chance (%)
1	28	21
2	28	20
3	29	20
4	29	19
5	29	18
6	29	18
7	29	17
8	30	16
9	30	16
10	30	15
11	30	15
12	30	14
13	29	14
14	29	14
15	29	13
16	29	13
17	28	12
18	28	11
19	28	11
20	28	10
21	28	9
22	28	9
23	27	8
24	27	7
25	27	7
26	27	6
27	27	5
28	27	5
29	27	4
30	27	4

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	4	-3
2	4	-3
3	4	-3
4	4	-3
5	5	-3
6	5	-2
7	5	-2
8	5	-2
9	5	-2
10	6	-2
11	6	-1
12	6	-1
13	6	-1
14	6	-1
15	7	-1
16	7	-1
17	7	0
18	7	0
19	8	0
20	8	0
21	8	0
22	9	0
23	9	1
24	9	1
25	9	1
26	10	1
27	10	1
28	10	2
29	10	2
30	11	2

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	35	65
4	33	67
5	33	67
6	33	67
7	32	68
8	32	68
9	31	69
10	31	69
11	30	70
12	30	70
13	30	70
14	30	70
15	31	69
16	31	69
17	33	67
18	33	67
19	33	67
20	34	66
21	34	66
22	36	64
23	36	64
24	36	64
25	36	64
26	38	62
27	39	61
28	38	62
29	39	61
30	39	61

	Rain chance (%)	Snow chance (%)
1	28	21
2	28	20
3	29	20
4	29	19
5	29	18
6	29	18
7	29	17
8	30	16
9	30	16
10	30	15
11	30	15
12	30	14
13	29	14
14	29	14
15	29	13
16	29	13
17	28	12
18	28	11
19	28	11
20	28	10
21	28	9
22	28	9
23	27	8
24	27	7
25	27	7
26	27	6
27	27	5
28	27	5
29	27	4
30	27	4

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	4	-3
2	4	-3
3	4	-3
4	4	-3
5	5	-3
6	5	-2
7	5	-2
8	5	-2
9	5	-2
10	6	-2
11	6	-1
12	6	-1
13	6	-1
14	6	-1
15	7	-1
16	7	-1
17	7	0
18	7	0
19	8	0
20	8	0
21	8	0
22	9	0
23	9	1
24	9	1
25	9	1
26	10	1
27	10	1
28	10	2
29	10	2
30	11	2

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	35	65
4	33	67
5	33	67
6	33	67
7	32	68
8	32	68
9	31	69
10	31	69
11	30	70
12	30	70
13	30	70
14	30	70
15	31	69
16	31	69
17	33	67
18	33	67
19	33	67
20	34	66
21	34	66
22	36	64
23	36	64
24	36	64
25	36	64
26	38	62
27	39	61
28	38	62
29	39	61
30	39	61

	Rain chance (%)	Snow chance (%)
1	28	21
2	28	20
3	29	20
4	29	19
5	29	18
6	29	18
7	29	17
8	30	16
9	30	16
10	30	15
11	30	15
12	30	14
13	29	14
14	29	14
15	29	13
16	29	13
17	28	12
18	28	11
19	28	11
20	28	10
21	28	9
22	28	9
23	27	8
24	27	7
25	27	7
26	27	6
27	27	5
28	27	5
29	27	4
30	27	4

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100