Mosfellsbær Weather in January
January in Mosfellsbær averages 3°C (37°F) during the day and -4°C (25°F) at night. Quite a bit of snow/rainfall is typical this month, with around 143 mm (5.6 in) on average. An umbrella is a good idea.
Rainfall in Mosfellsbær in January
Snow/rain is expected on roughly 18 days, totalling around 143 mm (5.6 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Mosfellsbær in January
In January, Mosfellsbær gets low temperatures, with highs of 3°C (37°F). Nights cool to around -4°C (25°F). January is known for being in the winter season. Staying warm is the main priority this month, especially during mornings and evenings. Nights drop below freezing to -4°C (25°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. This month tends to bring the coldest weather of the year, so be sure to pack enough warm clothing to stay comfortable.
Sunshine in Mosfellsbær 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.
Wind Speed in Mosfellsbær in January
Average wind conditions reach 6 m/s (12 knots) in January. This creates notably windy weather that is clearly felt and can influence daily activities. Keep in mind this is an average. Some days are less intense, while others can be quite gusty.
Average water temperature in January
At 6°C (43°F), the water is too cold for most people to swim comfortably. A wetsuit is pretty much essential if you plan to go in.If you're looking for dry conditions and comfortable temperatures, January may not be the ideal month to visit Mosfellsbær. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Mosfellsbær's climate page.
Mosfellsbær Temperature in January
Min Temperature
-4°C (25°F)
Max Temperature
3°C (37°F)
Water Temperature
6°C (43°F) *
Chance of Rain
60%
Precipitation
143 mm (5.6 in)
Rainy days
18 days
Humidity
78% *
Windspeed
6 m/s (12 knots) *
Sunshine
20 hours *
Percentage Sunshine
12% *
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Mosfellsbær typically stay consistent throughout January, with daily highs averaging around 3°C (37°F). Nights are very cold, with lows around -2°C (28°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 for Mosfellsbær in January
Browse day-by-day weather records for Mosfellsbær spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mosfellsbær historical weather extremes in January
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Mosfellsbær.
- The hottest January day on record in Mosfellsbær reached 10°C (50°F) (January 4, 2013).
- The coldest January day was on January 15, 2023, with a maximum of -8°C (18°F).
- Mosfellsbær registered its coldest January night on January 31, 1979, with temperatures dropping to -16°C (3°F).
- The wettest day in January Mosfellsbær was on January 29, 1982 with 47 mm (1.9 in) of precipitation.
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 →
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What to Wear in Mosfellsbær in January
Dress warmly and in layers for your trip to Mosfellsbær in January. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 6°C (43°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Mosfellsbær in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Mosfellsbær's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Mosfellsbær climate overview or explore weather in Iceland.
