Porsgrunn weather in April

In April, Porsgrunn sees average daytime highs of 10°C and overnight lows near 1°C, with 59 mm of precipitation across 9.4 wet days and about 14.1 hours of daylight. It is the 6th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 7°C in the first days to 12°C by the end. The sky is clear or mostly clear about 26% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 48 min at the start of April to 15 h 18 min by month's end. Set against the rest of the year, April is Porsgrunn's 4th-clearest and 8th-windiest month. For the whole year in context, see Porsgrunn's year-round climate.

Daytime high: 10°; 6th warmest
Overnight low: 1°; 6th coldest
Precipitation: 59 mm; 9.4 wet days
Daylight: 14 h 06 min; 5:18 AM – 7:25 PM
Cloud cover: 63%; 4th clearest
Wind: 10 km/h; 8th windiest
Solar energy: 4 kWh/m²
Travel score: 2.1; out of 10

Porsgrunn is town in Porsgrunn Municipality, Norway.

Air quality: Good; PM2.5 7.4 µg/m³ · 2019
Founded: 1807

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

← March Porsgrunn 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 7°C in the first days to 12°C by the end.

A typical April day in Porsgrunn reaches about 10°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 5°C and 15°C. Set against its neighbours, April runs about 5°C warmer than March and about 5°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)	7	7	7	8	8	8	8	8	8	9	9	9	9	9	10	10	10	10	10	11	11	11	11	11	11	12	12	12	12	12
Avg low (°C)	-1	-1	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	2	2	2	2	2	2	3	3	3	3	3	3	4

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

How April really feels in Porsgrunn

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 24 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.

Porsgrunn weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	0° / -5°	92	12.2	10.3	6.6	0.0
Feb	1° / -5°	62	9.3	8.4	8.8	0.0
Mar	5° / -3°	63	8.7	6.6	11.3	0.2
Apr	10° / 1°	59	9.4	3.5	14.1	2.1
May	15° / 6°	74	10.8	0.6	16.6	4.3
Jun	18° / 10°	94	12.5	0	18	5.5
Jul	20° / 12°	99	12.5	0	17.4	5.9
Aug	20° / 12°	106	13.4	0	15.2	5.7
Sep	15° / 8°	101	11.5	0	12.6	4.4
Oct	10° / 4°	107	12.5	1.5	9.8	1.9
Nov	5° / 0°	108	13	5.3	7.4	0.1
Dec	1° / -3°	84	12.2	8	5.9	0.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to cloud over as the month goes on.

	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 (%)	46	44	44	45	43	44	44	43	43	44	44	44	44	44	45	45	45	44	43	43	42	42	42	41	41	40	40	40	40	40
Cloudier (%)	54	56	56	55	57	56	56	57	57	56	56	56	56	56	55	55	55	56	57	57	58	58	58	59	59	60	60	60	60	60

	Clearer (%)	Cloudier (%)
1	46	54
2	44	56
3	44	56
4	45	55
5	43	57
6	44	56
7	44	56
8	43	57
9	43	57
10	44	56
11	44	56
12	44	56
13	44	56
14	44	56
15	45	55
16	45	55
17	45	55
18	44	56
19	43	57
20	43	57
21	42	58
22	42	58
23	42	58
24	41	59
25	41	59
26	40	60
27	40	60
28	40	60
29	40	60
30	40	60

Chance of precipitation in April

Any precipitationSnow

Porsgrunn gets around 59 mm of rain and snow over 9.4 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 30% and peaks near 35% 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	30	30	30	29	29	29	28	28	27	27	27	28	28	29	29	30	31	32	33	33	34	34	34	35	35
Snow chance (%)	15	15	15	15	15	15	15	15	14	14	14	13	13	13	12	12	11	11	10	10	9	9	8	8	7	7	7	7	6	6

	Rain chance (%)	Snow chance (%)
1	28	15
2	28	15
3	29	15
4	29	15
5	29	15
6	30	15
7	30	15
8	30	15
9	29	14
10	29	14
11	29	14
12	28	13
13	28	13
14	27	13
15	27	12
16	27	12
17	28	11
18	28	11
19	29	10
20	29	10
21	30	9
22	31	9
23	32	8
24	33	8
25	33	7
26	34	7
27	34	7
28	34	7
29	35	6
30	35	6

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 10 km/h in April.

Across April, daily wind ranges from about 10 km/h on the calmest days to 10 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)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
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	10	calm
2	10	calm
3	10	calm
4	10	calm
5	10	calm
6	10	calm
7	10	calm
8	10	calm
9	10	calm
10	10	calm
11	10	calm
12	10	calm
13	10	calm
14	10	calm
15	10	calm
16	10	calm
17	10	calm
18	10	calm
19	10	calm
20	10	calm
21	10	calm
22	10	calm
23	10	calm
24	10	calm
25	10	calm
26	10	calm
27	10	calm
28	10	calm
29	10	calm
30	10	calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 48 min at the start of April to 15 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 150 minutes over April. Sunrise moves from 6:02 AM to 4:39 AM, and sunset from 6:50 PM to 7:59 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)	12.8	12.9	13.0	13.1	13.1	13.2	13.3	13.4	13.5	13.6	13.7	13.8	13.9	13.9	14.0	14.1	14.2	14.3	14.4	14.5	14.6	14.7	14.7	14.8	14.9	15.0	15.1	15.2	15.3	15.3
Sunrise (AM)	6:02	5:59	5:56	5:53	5:50	5:47	5:44	5:41	5:38	5:35	5:33	5:30	5:27	5:24	5:21	5:18	5:15	5:12	5:09	5:06	5:03	5:01	4:58	4:55	4:52	4:49	4:47	4:44	4:41	4:39
Sunset (PM)	6:50	6:52	6:54	6:57	6:59	7:02	7:04	7:06	7:09	7:11	7:13	7:16	7:18	7:21	7:23	7:25	7:28	7:30	7:33	7:35	7:37	7:40	7:42	7:44	7:47	7:49	7:52	7:54	7:56	7:59

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.8	6:02	6:50
2	12.9	5:59	6:52
3	13.0	5:56	6:54
4	13.1	5:53	6:57
5	13.1	5:50	6:59
6	13.2	5:47	7:02
7	13.3	5:44	7:04
8	13.4	5:41	7:06
9	13.5	5:38	7:09
10	13.6	5:35	7:11
11	13.7	5:33	7:13
12	13.8	5:30	7:16
13	13.9	5:27	7:18
14	13.9	5:24	7:21
15	14.0	5:21	7:23
16	14.1	5:18	7:25
17	14.2	5:15	7:28
18	14.3	5:12	7:30
19	14.4	5:09	7:33
20	14.5	5:06	7:35
21	14.6	5:03	7:37
22	14.7	5:01	7:40
23	14.7	4:58	7:42
24	14.8	4:55	7:44
25	14.9	4:52	7:47
26	15.0	4:49	7:49
27	15.1	4:47	7:52
28	15.2	4:44	7:54
29	15.3	4:41	7:56
30	15.3	4:39	7:59

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4 kWh/m².

For context, solar energy here swings from a low near 0.24 kWh/m² to a high of 5.78 kWh/m² in June across the year — April's 4 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)	3.3	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	4.0	4.1	4.2	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.7
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.3	Moderate
2	3.4	Moderate
3	3.4	Moderate
4	3.5	Moderate
5	3.5	Moderate
6	3.6	Moderate
7	3.6	Moderate
8	3.7	Moderate
9	3.7	Moderate
10	3.8	Moderate
11	3.8	Moderate
12	3.9	Moderate
13	4.0	Moderate
14	4.0	Bright
15	4.0	Bright
16	4.1	Bright
17	4.2	Bright
18	4.2	Bright
19	4.2	Bright
20	4.3	Bright
21	4.3	Bright
22	4.3	Bright
23	4.4	Bright
24	4.4	Bright
25	4.5	Bright
26	4.5	Bright
27	4.5	Bright
28	4.6	Bright
29	4.6	Bright
30	4.7	Bright

Planning a trip in April

Is April a good time to visit Porsgrunn?

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

2.1

Sightseeing

6th-best month of the year

0.0

Beach & pool

7th-best month of the year

April is a weaker month for outdoor sightseeing in Porsgrunn.

What to pack for Porsgrunn in April

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

In April, Porsgrunn sees daytime highs around 10°C and nights near 1°C. Pack a warm layer. Worth having: rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Porsgrunn in April

The nearest coast averages about 6°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 30 km away) is warmest in August at about 18°C and coldest in February near 3°C.

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	5	3	4	6	11	15	17	18	15	12	9	6
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	5	Bracing
Feb	3	Bracing
Mar	4	Bracing
Apr	6	Bracing
May	11	Bracing
Jun	15	Bracing
Jul	17	Cool
Aug	18	Cool
Sep	15	Cool
Oct	12	Bracing
Nov	9	Bracing
Dec	6	Bracing

UV index in Porsgrunn 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 Porsgrunn peaks around July 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	4	5	5	3	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	4	Moderate
Jul	5	Moderate
Aug	5	Moderate
Sep	3	Moderate
Oct	1	Low
Nov	0	Low
Dec	0	Low

Location & terrain

Where is Porsgrunn?

Porsgrunn sits at 59.1°N, 9.7°E, 9 m above sea level, in Norway. The nearest listed city is Skien, 8.0 km away.

Topography around Porsgrunn

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

Within 3 km, the terrain around Porsgrunn has significant variations in elevation — a maximum elevation change of 254 m around an average of 48 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 548 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,422 m.

The land around Porsgrunn is covered by trees (46%) and artificial surfaces (23%) within 3 km, trees (73%) within 16 km, and trees (59%) and water (31%) within 80 km.

3 km

254 m

trees 46%

16 km

548 m

trees 73%

80 km

1,422 m

trees 59%

treesgrasslandcroplandartificial surfaceswater

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

April weather nearby: Skien 8.0 km · Larvik 24 km · Sandefjord 32 km · Tønsberg 45 km · Horten 56 km · Kongsberg 59 km · Moss 66 km · Fredrikstad 73 km

Norway travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 91% of US; price level, 2025
GDP per capita: $94,594; 2025
Happiness: 7.2 / 10; World Happiness, 2025
Safe drinking water: 99%; of population, 2024
Homicide rate: 0.7; per 100k, 2023
Road deaths: 2.1; per 100k/yr, 2019
Income group: High; World Bank
English: Very high; EF EPI 613
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 Porsgrunn (59.1405°, 9.6561°, elevation 9 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).

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

	Clearer (%)	Cloudier (%)
1	46	54
2	44	56
3	44	56
4	45	55
5	43	57
6	44	56
7	44	56
8	43	57
9	43	57
10	44	56
11	44	56
12	44	56
13	44	56
14	44	56
15	45	55
16	45	55
17	45	55
18	44	56
19	43	57
20	43	57
21	42	58
22	42	58
23	42	58
24	41	59
25	41	59
26	40	60
27	40	60
28	40	60
29	40	60
30	40	60

	Rain chance (%)	Snow chance (%)
1	28	15
2	28	15
3	29	15
4	29	15
5	29	15
6	30	15
7	30	15
8	30	15
9	29	14
10	29	14
11	29	14
12	28	13
13	28	13
14	27	13
15	27	12
16	27	12
17	28	11
18	28	11
19	29	10
20	29	10
21	30	9
22	31	9
23	32	8
24	33	8
25	33	7
26	34	7
27	34	7
28	34	7
29	35	6
30	35	6

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

	Clearer (%)	Cloudier (%)
1	46	54
2	44	56
3	44	56
4	45	55
5	43	57
6	44	56
7	44	56
8	43	57
9	43	57
10	44	56
11	44	56
12	44	56
13	44	56
14	44	56
15	45	55
16	45	55
17	45	55
18	44	56
19	43	57
20	43	57
21	42	58
22	42	58
23	42	58
24	41	59
25	41	59
26	40	60
27	40	60
28	40	60
29	40	60
30	40	60

	Rain chance (%)	Snow chance (%)
1	28	15
2	28	15
3	29	15
4	29	15
5	29	15
6	30	15
7	30	15
8	30	15
9	29	14
10	29	14
11	29	14
12	28	13
13	28	13
14	27	13
15	27	12
16	27	12
17	28	11
18	28	11
19	29	10
20	29	10
21	30	9
22	31	9
23	32	8
24	33	8
25	33	7
26	34	7
27	34	7
28	34	7
29	35	6
30	35	6

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

	Clearer (%)	Cloudier (%)
1	46	54
2	44	56
3	44	56
4	45	55
5	43	57
6	44	56
7	44	56
8	43	57
9	43	57
10	44	56
11	44	56
12	44	56
13	44	56
14	44	56
15	45	55
16	45	55
17	45	55
18	44	56
19	43	57
20	43	57
21	42	58
22	42	58
23	42	58
24	41	59
25	41	59
26	40	60
27	40	60
28	40	60
29	40	60
30	40	60

	Rain chance (%)	Snow chance (%)
1	28	15
2	28	15
3	29	15
4	29	15
5	29	15
6	30	15
7	30	15
8	30	15
9	29	14
10	29	14
11	29	14
12	28	13
13	28	13
14	27	13
15	27	12
16	27	12
17	28	11
18	28	11
19	29	10
20	29	10
21	30	9
22	31	9
23	32	8
24	33	8
25	33	7
26	34	7
27	34	7
28	34	7
29	35	6
30	35	6

	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