Best time to go

Porsgrunn in December 2026: weather, temperatures and activities

Do you want to visit Porsgrunn in December 2026? Discover the usual weather at this time of year, average temperatures, the risk of rain, possible activities, and our opinion on whether December is a good month to travel to Porsgrunn, Norway.

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Is it worth visiting Porsgrunn in December?

Check your ideal travel criteria and see if the month of December suits your plans to go to Porsgrunn.
What matters most?
Porsgrunn in December 2026: weather, temperatures and activities

Page summary

Porsgrunn in December in summary
Very bad weather
Min -1°C Max 1°C 94 mm 6 day(s) 87% 56% 10°C 4.0 h/day 22.3 cm
Best activities in December
Winter sports and snow
Practical guidelines
Low crowds 09:11 15:22
Hourly weather

Average weather in Porsgrunn in December 2026

Very bad weather

The weather in Porsgrunn in December 2026 is based on statistical data from previous years in December. This allows you to forecast the weather in December 2026. Check the hourly statistics (6:00, 9:00, 12:00, 15:00, 18:00, 21:00, 0:00 and 3:00), with the associated average temperature, for the whole month, and also, by navigating the tabs, for the beginning, middle and end of the month.

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Climate

Climate of Porsgrunn in December

Temperatures, precipitation, snow and monthly trends help better understand the climate in Porsgrunn in December.

Temperatures and rain in Porsgrunn in December

Average daily weather

Temperatures, rain and snow day by day in December, with a separate scale for snow.
Minimal Average Maximums Average rainfall Daily snow

Monthly temperatures

The month of December is highlighted to compare it quickly with the rest of the year.
Minimal Average Maximums

Monthly precipitation

The bar for the month under study is highlighted.
Average rainfall

About the climate in Porsgrunn in December

Seasonal normals

Seasonal normals of Porsgrunn in December

Check the seasonal normals in Porsgrunn in December and compare the weather with the previous month and the following month (or the months of your choice by selecting months in the form below): temperatures, wind, rain, humidity, climate rating...

Last updated: 12/01/2026
Reference period for normals: January 2009 - December 2025
Month analyzed
December
Weather data November December January
Outside temperature
Average temperature 3.7°C -0.1°C -1.9°C
Maximum temperature 5.0°C 1.2°C -0.5°C
Minimum temperature 2.5°C -1.4°C -3.3°C
Record maximum temperature 14.0°C
(2021)
11.0°C
(2017)
9.0°C
(2020)
Record low temperature -10.0°C
(2010)
-17.0°C
(2010)
-16.0°C
(2010)
Number of days at +30° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Number of days at +18° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Number of days below 0° 8 day(s)
(27%)
17 day(s)
(55%)
23 day(s)
(74%)
Sea temperature
Sea temperature (average) 9.1°C 6.2°C 4.3°C
Sea temperature (minimum) 6.2°C 3.0°C 0.8°C
Sea temperature (maximum) 12.0°C 9.8°C 7.9°C
Wind
Wind speed 18 km/h 19 km/h 19 km/h
Wind temperature -1.1°C -5.6°C -8.0°C
Precipitation (rain)
Precipitation 115.5 mm 94.0 mm 95.5 mm
Number of days with precipitation 16 day(s)
(53%)
14 day(s)
(45%)
15 day(s)
(48%)
Number of days with significant precipitation (greater than 5 mm) 7 day(s)
(22%)
6 day(s)
(19%)
6 day(s)
(19%)
Record precipitation in one day 66.7 mm
(2018)
49.7 mm
(2020)
43.8 mm
(2009)
Other weather data
Humidity 87% 87% 88%
Visibility 8.4 km 8.4 km 7.9 km
Cloud cover 58% 56% 56%
UV index 2 2 1
Daily sunshine 5h 4h 5h
Sunrise and sunset
Sunrise time 08h14 09h11 09h02
Sunset time 15h57 15h22 16h00
Day length 7h43 6h11 6h58
Our opinion on the climate in December
The review of Where And When very bad weather very bad weather very bad weather
Activities and events

What to do in Porsgrunn in December?

Best activities in December
Winter sports and snow
Activities not recommended in December
Beach and swimmingNature and landscapesBoat trip and cruise
Observed weather

What was the weather like in Porsgrunn in December last?

Find the observed weather calendar in Porsgrunn in December 2025, with each day’s weather, temperatures and precipitation.

Mon. Tue. Wed. Thu. Fri. Sat. Sun.
1
Overcast
-4°C5°C1.7 mm
2
Light rain
6°C7°C5.5 mm
3
Mist
4°C6°C1.9 mm
4
Light rain shower
4°C5°C3.8 mm
5
Light rain shower
5°C6°C4.7 mm
6
Mist
3°C4°C3.0 mm
7
Mist
3°C4°C0.8 mm
8
Mist
5°C7°C4.0 mm
9
Clear/Sunny
2°C6°C1.3 mm
10
Clear/Sunny
4°C8°C3.0 mm
11
Overcast
9°C10°C0.1 mm
12
Overcast
3°C6°C0.0 mm
13
Clear/Sunny
4°C6°C1.4 mm
14
Overcast
6°C8°C0.0 mm
15
Overcast
7°C8°C0.0 mm
16
Patchy rain nearby
7°C8°C1.5 mm
17
Partly Cloudy
3°C7°C0.6 mm
18
Light drizzle
6°C8°C1.6 mm
19
Clear/Sunny
6°C9°C5.1 mm
20
Clear/Sunny
7°C8°C0.0 mm
21
Overcast
1°C2°C0.0 mm
22
Partly Cloudy
0°C1°C0.0 mm
23
Overcast
-1°C0°C0.0 mm
24
Clear/Sunny
-3°C-2°C0.0 mm
25
Clear/Sunny
-2°C1°C0.0 mm
26
Clear/Sunny
2°C3°C0.0 mm
27
Clear/Sunny
-1°C1°C0.0 mm
28
Clear/Sunny
-2°C-1°C0.0 mm
29
Cloudy
-2°C-1°C0.0 mm0.1 cm
30
Clear/Sunny
-6°C-4°C0.0 mm
31
Clear/Sunny
-5°C-3°C0.0 mm
Nearby

Where to go near Porsgrunn in December?

Compare cities and destinations near Porsgrunn in December to find another travel stop, a nearby alternative or a logical continuation of your stay in Porsgrunn.

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Every month

Best time to visit Porsgrunn month by month

Compare the weather in Porsgrunn across all months of the year and open each detailed page to find the best time.

Frequently asked questions

Travel to to Porsgrunn in December: your frequently asked questions

Short answers to the questions we ask ourselves before booking for this month.

Not really. The weather conditions are unfavorable in Porsgrunn in December, which places this month 12th out of 12. A trip is still possible, but plan a flexible itinerary.

Expect an average of 1°C during the day and -1°C at night, with about 94 mm of precipitation spread over 6 rainy days.

The sea is only 6°C on average in December. Swimming is still possible, but it will be cool.

Expect about 4.0 hours of sunshine per day on average for this month.

This month is particularly suited to these activities: Winter sports and snow. These are the ones for which the conditions on site are most favourable.

No: this month is in Low crowds, with a visitor index of 21/100. It is one of the quietest periods of the year.

If your dates are flexible, the most favorable months in Porsgrunn are: June, July, August and September. Compare them before finalizing your departure.
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