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Siglufjörður Weather in May
May in Siglufjörður brings low temperatures, with daytime highs of 6°C (43°F) and nights around 2°C (36°F). Quite a bit of rainfall is expected, around 72 mm (2.8 in), so pack an umbrella.
Rainfall in Siglufjörður in May
Historically, May sees about 12 days of rain, with a monthly average of 72 mm (2.8 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Siglufjörður in May
May in Siglufjörður brings low temperatures, with highs of 6°C (43°F) and nights around 2°C (36°F). Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. At 2°C (36°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Siglufjörður in May
You can expect a moderate amount of sunlight, with approximately 169 hours. This means a pleasant mix of sun and overcast.If you're looking for dry conditions and comfortable temperatures, May may not be the ideal month to visit Siglufjörður. Our weather planner can help you explore destinations with more pleasant weather conditions.
Siglufjörður Temperature in May
Min Temperature
2°C (36°F)
Max Temperature
6°C (43°F)
Chance of Rain
40%
Precipitation
72 mm (2.8 in)
Rainy days
12 days
Humidity
73% *
Sunshine
169 hours *
Percentage Sunshine
28% *
* Data from: Akureyri, Iceland (64 KM, 39 Miles).
Siglufjörður Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Siglufjörður - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Siglufjörður typically rise from around 6°C (43°F) at the start of May to approximately 10°C (50°F) by the end. Nights are cold, with lows typically ranging from -2°C (28°F) to 3°C (37°F).
Average temperatures in May
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 May
Historical weather records for Siglufjörður in May
Browse day-by-day weather records for Siglufjörður spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Siglufjörður historical weather extremes in May
According to our 50 years of weather records for Siglufjörður, the following extremes were recorded between 1976 and 2026.
- On May 17, 2025, temperatures climbed to 22°C (72°F), marking the warmest May day on record.
- On May 3, 1982, Siglufjörður saw its coldest May day with temperatures maxing out at -5°C (23°F).
- The wettest day in May Siglufjörður was on May 21, 1986 with 24 mm (0.9 in) of precipitation.
Best Places in Iceland in May
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in May →
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 Siglufjörður in May
Cold weather calls for smart layering in May. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Siglufjörður in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling3/10 -
Walking3/10 -
Camping4/10 -
Outdoor sports3/10
Siglufjörður 3-Day Forecast
More climate data for Siglufjörður
Temperature Rainfall Sunshine Humidity
See the full Siglufjörður climate overview or explore weather in Iceland.
Popular in May
Where to go in May - average daytime high across popular destinations.
Hella
12°C (54°F) Reykjavík
11°C (52°F) Kópavogur11°C (52°F) Selfoss11°C (52°F) Keflavík9°C (48°F) Höfn
8°C (46°F) Akureyri
6°C (43°F) Egilsstadir7°C (45°F) Bucket list
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