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Selfoss Weather in January
With daytime temperatures of 4°C (39°F) and nighttime lows of -2°C (28°F), January in Selfoss brings low temperatures during the day. Do keep in mind that quite a bit of snow/rainfall is typical. Around 166 mm (6.5 in) falls on average.
Rainfall in Selfoss in January
Historically, January sees about 18 days of snow/rain, with a monthly average of 166 mm (6.5 in). Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Selfoss in January
Daytime temperatures in Selfoss reach 4°C (39°F) in January, dropping to -2°C (28°F) at night. January is part of the winter season. It stays very cold throughout much of the day, so warm winter clothing is essential. Nights are well below freezing at -2°C (28°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. The coldest month of the year calls for plenty of warm layers. Be sure to pack your winter gear.
Sunshine in Selfoss in January
This month is characterized by fewer sunny days, with about 20 hours of sunshine. It's great for those who appreciate cooler, less sunny days.If you're looking for dry conditions and comfortable temperatures, January may not be the ideal month to visit Selfoss. Our weather planner can help you explore destinations with more pleasant weather conditions.
Selfoss Temperature in January
Min Temperature
-2°C (28°F)
Max Temperature
4°C (39°F)
Chance of Rain
59%
Precipitation
166 mm (6.5 in)
Rainy days
18 days
Humidity
78% *
Sunshine
20 hours *
Percentage Sunshine
12% *
* Data from: Reykjavík, Iceland (48 KM, 30 Miles).
Selfoss Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Selfoss - and find the best time to visit.
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Selfoss typically stay consistent throughout January, with daily highs averaging around 4°C (39°F). Nights are very cold, with lows around -3°C (27°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather records for Selfoss in January
Browse day-by-day weather records for Selfoss spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Selfoss historical weather extremes in January
According to our 49 years of weather records for Selfoss, the following extremes were recorded between 1976 and 2025.
- On January 4, 2013, temperatures climbed to 10°C (50°F), marking the warmest January day on record.
- Selfoss experienced its chilliest January day on January 15, 2023, reaching only -8°C (18°F).
- The lowest overnight temperature recorded in January was -16°C (3°F) (January 25, 1988).
- The heaviest January precipitation occurred on January 31, 1994, when 62 mm (2.4 in) of precipitation fell.
Best Places in Iceland in January
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in January →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Selfoss in January
Cold weather calls for smart layering in January. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Sunglasses aren't essential this month, though you might want them for the occasional bright moment.
What To Do in Selfoss in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming4/10 -
Cycling3/10 -
Walking3/10 -
Camping1/10 -
Outdoor sports3/10
Selfoss 3-Day Forecast
More climate data for Selfoss
Temperature Rainfall Sunshine Humidity
See the full Selfoss climate overview or explore weather in Iceland.
Popular in January
Where to go in January - average daytime high across popular destinations.
Keflavík
5°C (41°F) Hella5°C (41°F) Kópavogur3°C (37°F) Selfoss4°C (39°F) Höfn4°C (39°F) Reykjavík3°C (37°F) Akureyri
0°C (32°F) Egilsstadir1°C (34°F) Bucket list
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