January
Tough weather
0.5/10
5°C / 1°C · 20 rain days · 1.8 h sun · sea 7°C
Days stay cold, with a high of 5.1°C and a low of 1.4°C. Rain falls on almost 20 days, with only 1.8 hours of sun a day, so this is one of the darkest, wettest months. The score of 0.5 marks it as a tough time to visit. New Year's Day is the only holiday.
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February
Tough weather
1.0/10
5°C / 2°C · 19 rain days · 3.9 h sun · sea 7°C
Highs reach 5.2°C and rain still falls on about 18 to 19 days. Sunshine creeps up slightly to 3.9 hours daily, but the weather stays raw and windy. With a score of 1, this month is still a hard sell for sightseeing.
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March
Tough weather
1.4/10
6°C / 2°C · 22 rain days · 5.7 h sun · sea 7°C
Temperatures rise a little to 5.7°C by day, but rain days actually increase to 21.6, the wettest spell of the year by frequency. Sun hours climb to 5.7, giving slightly longer daylight. The score of 1.4 shows conditions remain difficult, with wind and rain common.
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April
Tough weather
2.0/10
7°C / 3°C · 16 rain days · 7.8 h sun · sea 7°C
April brings a real change: rain days drop to 15.9 and rainfall totals fall to 85mm, the driest stretch so far. Highs reach 6.9°C and sun hours rise to 7.8. The score climbs to 2, and the Easter holidays (Maundy Thursday through Easter Monday) plus National Flag Day on the 25th fall in this month.
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May
Tough weather
2.6/10
9°C / 5°C · 17 rain days · 8.6 h sun · sea 8°C
Spring settles in with highs of 9.1°C and lows above freezing at 5.2°C. Rain days average 16.6 and sun hours reach 8.6, among the best of the year. General Prayer Day, Ascension Day and Pentecost fall this month, though the overall score of 2.6 still signals cool, changeable weather.
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June
Tough weather
3.7/10
11°C / 8°C · 16 rain days · 9.0 h sun · sea 9°C
Highs reach 11.4°C with sea temperatures warming to 9.4°C, making this a comfortable month for walking. Rain days sit around 16.2, lower than winter months, though rainfall totals rise slightly to 97mm. Constitution Day falls on 5 June, and the score of 3.7 shows conditions improving but not yet top-rated.
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July
Best time
4.3/10
13°C / 9°C · 20 rain days · 7.8 h sun · sea 11°C
July is one of the two best-rated months, with a score of 4.3. Highs reach 12.7°C and sea temperature hits 10.8°C, the warmest water of the year. Rain days rise again to 20.1, so showers are still frequent, but Saint Olav's Eve and Saint Olav's Day on 28 and 29 July bring the islands' main cultural celebration.
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August
Best time
4.3/10
13°C / 9°C · 18 rain days · 7.7 h sun · sea 11°C
August matches July's score of 4.3 and offers the warmest air of the year at 12.8°C high. Sea temperature peaks at 11.3°C, good for coastal activities. Rain days average 18.4, so waterproofs are still needed, but this remains one of the better windows to visit.
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September
Tough weather
3.1/10
12°C / 8°C · 19 rain days · 5.6 h sun · sea 11°C
Autumn arrives quickly: highs drop to 11.5°C and rain days rise to 19.1, with rainfall jumping to 143mm. Sunshine falls to 5.6 hours a day. The score drops to 3.1, reflecting the shift toward darker, wetter conditions.
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October
Tough weather
1.5/10
9°C / 6°C · 20 rain days · 3.8 h sun · sea 10°C
Weather turns distinctly autumnal, with highs of only 9.2°C and rain on roughly 20 days, totalling 163mm. Sun hours fall to 3.8. The score of 1.5 reflects increasingly rough, wet weather as daylight shortens.
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November
Tough weather
0.6/10
7°C / 4°C · 19 rain days · 2.2 h sun · sea 9°C
Highs drop to 6.9°C and sunshine is scarce at just 2.2 hours a day. Rain days stay high at 19, and the score falls to 0.6, among the lowest of the year. This is a dark, stormy month with little daylight for sightseeing.
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December
Tough weather
0.3/10
6°C / 2°C · 20 rain days · 1.0 h sun · sea 8°C
December is the lowest-scoring month at 0.3, with just 1 hour of sun a day and rain on over 20 days, the wettest total of the year at 169mm. Highs reach only 5.7°C. Christmas Eve, Christmas Day, St. Stephen's Day and New Year's Eve bring the only festive breaks in an otherwise dark, wet month.
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