Mosfellsbær Weather in October
October in Mosfellsbær averages 8°C (46°F) during the day and 2°C (36°F) at night. Quite a bit of rainfall is typical this month, with around 125 mm (4.9 in) on average. An umbrella is a good idea.
Rainfall in Mosfellsbær in October
Typically, about 19 days will experience rainfall, with an average of 125 mm (4.9 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 October
Mosfellsbær in October gets highs of 8°C (46°F) during the day and drops to 2°C (36°F) at night. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With overnight lows of 2°C (36°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Mosfellsbær in October
The area sees fewer sunny days, with a projection of about 92 hours of sunshine. This reduced sunlight makes it ideal for those who prefer overcast conditions over bright sunny days.
Wind Speed in Mosfellsbær in October
Average wind conditions reach 5 m/s (10 knots) in October. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.
Average water temperature in October
At 9°C (48°F), the water is too cold for most people to swim comfortably. A wetsuit is pretty much essential if you plan to go in.October in Mosfellsbær has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
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 October
Min Temperature
2°C (36°F)
Max Temperature
8°C (46°F)
Water Temperature
9°C (48°F) *
Chance of Rain
64%
Precipitation
125 mm (4.9 in)
Rainy days
19 days
Humidity
80% *
Windspeed
5 m/s (10 knots) *
Sunshine
92 hours *
Percentage Sunshine
31% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mosfellsbær typically drop from around 9°C (48°F) at the start of October to approximately 6°C (43°F) by the end. Nights are cold, with lows typically ranging from 1°C (34°F) to 5°C (41°F).
Average temperatures in October
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 October
Historical weather for Mosfellsbær in October
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 October
Based on weather observations in Mosfellsbær between 1976 and 2025, these are the recorded extremes during October.
- Mosfellsbær recorded its highest October temperature of 15°C (59°F) on October 18, 2001.
- On October 31, 1996, Mosfellsbær saw its coldest October day with temperatures maxing out at -2°C (28°F).
- The coldest night in October in Mosfellsbær was on October 30, 2025, with a minimum of -8°C (18°F).
- Peak precipitation in October occurred on October 21, 1977, when 81 mm (3.2 in) of precipitation was measured.
Best Places in Iceland in October
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in October →
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What to Wear in Mosfellsbær in October
We recommend to layer up for chilly conditions in Mosfellsbær in October. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Expect water temperatures of around 9°C (48°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 October
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.
