Mosfellsbær Weather in March

March in Mosfellsbær averages 4°C (39°F) during the day and -3°C (27°F) at night. Quite a bit of snow/rainfall is typical this month, with around 133 mm (5.2 in) on average. An umbrella is a good idea.

Rainfall in Mosfellsbær in March

Based on our climate data of the past 30 years, about 19 days of snow/rain are anticipated, with 133 mm (5.2 in) on average. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Mosfellsbær in March

March in Mosfellsbær sees highs of 4°C (39°F) and lows of -3°C (27°F) overnight. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. Nights are well below freezing at -3°C (27°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. This month is extremely cold, so be sure to dress in layers to keep warm. Proper preparation can help you stay comfortable.

Sunshine in Mosfellsbær in March

The month brings about 111 hours of sunlight, offering a comfortable mix of sun and overcast.

Wind Speed in Mosfellsbær in March

Wind speeds average 6 m/s (12 knots) during March. At this speed, expect strong winds that make large branches move and create some resistance when walking. Since this is an average, some days have fresh winds while others have strong breezes that can make umbrellas tricky to control.

Average water temperature in March

At 6°C (43°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

If you prefer dry days with pleasant temperatures, March may not be the ideal month to visit Mosfellsbær. Our weather planner can help you explore destinations with more pleasant weather conditions.

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• May
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For a detailed overview over the year and the best time to visit Iceland, check out our Mosfellsbær's climate page.

Mosfellsbær Temperature in March

Min Temperature -3°C (27°F)  

Max Temperature 4°C (39°F)  

Water Temperature 6°C (43°F) *  

Chance of Rain 64%  

Precipitation 133 mm (5.2 in)  

Rainy days 19 days  

Humidity 77% *  

Windspeed 6 m/s (12 knots) *  

Sunshine 111 hours *  

Percentage Sunshine 29% *  

* Data from: Reykjavík, Iceland (10 KM, 6 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Mosfellsbær typically stay consistent throughout March, with daily highs averaging around 4°C (39°F). Nights are very cold, with lows typically ranging from -3°C (27°F) to -1°C (30°F).

Average temperatures in March

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in March

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Historical weather for Mosfellsbær in March

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.

Historical weather Temperatures Precipitation

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Mosfellsbær historical weather extremes in March

According to our 50 years of weather records for Mosfellsbær, the following extremes were recorded between 1976 and 2026.

• Mosfellsbær recorded its highest March temperature of 13°C (55°F) on March 20, 2005.
• Mosfellsbær experienced its chilliest March day on March 6, 1998, reaching only -9°C (16°F).
• The lowest overnight temperature recorded in March was -14°C (7°F) (March 7, 1998).

What to Wear in Mosfellsbær in March

Cold weather calls for smart layering in March. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 6°C (43°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Mosfellsbær in March

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

3/10

Walking

3/10

Camping

1/10

Outdoor sports

3/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Iceland, check out our Mosfellsbær's climate page.

More climate data for Mosfellsbær

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Mosfellsbær climate overview or explore weather in Iceland.