Porsgrunn weather in October

In October, Porsgrunn sees average daytime highs of 10°C and overnight lows near 4°C, with 107 mm of precipitation across 12.5 wet days and about 9.8 hours of daylight. It is the 7th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 12°C in the first days to 7°C by the end. The sky is clear or mostly clear about 24% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of October to 8 h 30 min by month's end. Set against the rest of the year, October is Porsgrunn's 10th-clearest and 5th-windiest month. For the whole year in context, see Porsgrunn's year-round climate.

Daytime high
10°
7th warmest
Overnight low
7th coldest
Precipitation
107 mm
12.5 wet days
Daylight
9 h 48 min
7:11 AM – 5:01 PM
Cloud cover
68%
10th clearest
Wind
11 km/h
5th windiest
Solar energy
1.26 kWh/m²
Travel score
1.9
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.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 12°C in the first days to 7°C by the end.

A typical October day in Porsgrunn reaches about 10°C in the afternoon and slips back to 4°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 13°C. Set against its neighbours, October runs about 6°C cooler than September and about 5°C warmer than November.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1136
2126
3126
4126
5126
6125
7115
8115
9115
10115
11105
12104
13104
14104
15104
1694
1794
1893
1993
2093
2183
2283
2383
2483
2583
2683
2783
2872
2972
3072
3172

How October really feels in Porsgrunn

Once humidity and wind are folded in, October averages 0 days that feel above 32°C and 9 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
9
wind chill below the day's low

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

Porsgrunn weather by month

How October compares with the rest of the year at a glance. October is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°9212.210.36.60.0
Feb / -5°629.38.48.80.0
Mar / -3°638.76.611.30.2
Apr10° / 599.43.514.12.1
May15° / 7410.80.616.64.3
Jun18° / 10°9412.50185.5
Jul20° / 12°9912.5017.45.9
Aug20° / 12°10613.4015.25.7
Sep15° / 10111.5012.64.4
Oct10° / 10712.51.59.81.9
Nov / 108135.37.40.1
Dec / -3°8412.285.90.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 12% of October, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23961
33961
43961
53862
63862
73961
84060
93961
103961
113961
123961
133961
143763
153664
163664
173565
183466
193466
203466
213466
223367
233367
243367
253268
263268
273268
283268
293268
303268
313268

Chance of precipitation in October

Any precipitationSnow

Porsgrunn gets around 107 mm of rain and snow over 12.5 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 40% and peaks near 45% on the wettest days, and about 2 days bring snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1380
2380
3380
4380
5381
6381
7371
8372
9372
10362
11363
12363
13364
14364
15375
16375
17385
18396
19396
20406
21417
22427
23437
24447
25448
26458
27458
28458
29459
30459
314510

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October 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 (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in October

Winds average 11 km/h in October.

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

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 12 min at the start of October to 8 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 162 minutes over October. Sunrise moves from 6:35 AM to 7:49 AM, and sunset from 5:45 PM to 4:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:355:45
211.16:385:42
311.06:405:39
410.96:425:36
510.86:455:33
610.76:475:30
710.66:505:27
810.56:525:24
910.56:545:22
1010.46:575:19
1110.36:595:16
1210.27:025:13
1310.17:045:10
1410.07:075:07
159.97:095:04
169.87:115:01
179.77:144:59
189.77:164:56
199.67:194:53
209.57:214:50
219.47:244:47
229.37:264:45
239.27:294:42
249.17:314:39
259.07:344:37
269.07:364:34
278.97:394:31
288.87:414:29
298.77:444:26
308.67:464:24
318.57:494:21

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 1.26 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 — October's 1.26 kWh/m² falls in the middle.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.9Dim
21.8Dim
31.8Dim
41.7Dim
51.7Dim
61.6Dim
71.6Dim
81.6Dim
91.5Dim
101.5Dim
111.5Dim
121.4Dim
131.4Dim
141.3Dim
151.3Dim
161.3Dim
171.2Dim
181.2Dim
191.1Dim
201.1Dim
211.1Dim
221.0Dim
231.0Dim
241.0Dim
250.9Dim
260.9Dim
270.9Dim
280.8Dim
290.8Dim
300.8Dim
310.8Dim
Planning a trip in October

Is October a good time to visit Porsgrunn?

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

1.9
Sightseeing
7th-best month of the year
0.0
Beach & pool
6th-best month of the year

October is a weaker month for outdoor sightseeing in Porsgrunn.

What to pack for Porsgrunn in October

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

In October, Porsgrunn sees daytime highs around 10°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 13 days see rain.

a warm layerrain gear

Sea temperature near Porsgrunn in October

The nearest coast averages about 12°C in October — 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.

0°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan5Bracing
Feb3Bracing
Mar4Bracing
Apr6Bracing
May11Bracing
Jun15Bracing
Jul17Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov9Bracing
Dec6Bracing

UV index in Porsgrunn in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 1. 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJul 20UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun4Moderate
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
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
16 km
548 m
80 km
1,422 m
treesgrasslandcroplandartificial surfaceswater
October 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
Church of Norway 68%other Christian 4%Muslim 3%Roman Catholic 3%

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).