January in Gullfoss — the hardest end of the year
Hardest · 0.2/10January averages -7°C (20°F) — deep-winter cold that dictates the whole trip: short outdoor stints, indoor plans on standby, and no expectation of long walking days.
207 mm of rain puts this in monsoon territory — about 0 sunny days across the whole month, and multi-day washouts are normal.
It scores 0.2/10 here, 12th of 12 months, against 6.6/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 6.4 points higher on the same scale.
February in Gullfoss — the hardest end of the year
Hardest · 0.9/10February averages -7°C (20°F) — deep-winter cold that dictates the whole trip: short outdoor stints, indoor plans on standby, and no expectation of long walking days.
At 169 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 0.9/10 here, 10th of 12 months, against 6.6/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 5.7 points higher on the same scale.
March in Gullfoss — the hardest end of the year
Hardest · 1.6/10March averages -5°C (22°F) — deep-winter cold that dictates the whole trip: short outdoor stints, indoor plans on standby, and no expectation of long walking days.
At 151 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 1.6/10 here, 8th of 12 months, against 6.6/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 5 points higher on the same scale.
April in Gullfoss — the hardest end of the year
Hardest · 4.8/10April averages -1°C (29°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
Rainfall runs 85 mm, so plan one flexible day in three; you still get about 12 sunny days and 14.7 hours of daylight.
It scores 4.8/10 here, 5th of 12 months, against 6.6/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack insulated layers, a windproof shell, gloves and boots with grip, a packable rain layer, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 1.8 points higher on the same scale.
May in Gullfoss — workable with trade-offs
Trade-offs · 5.1/10May averages 2°C (35°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
At 168 mm this is a genuinely wet month: about 17 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.1/10 here, 4th of 12 months, against 6.6/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 1.5 points higher on the same scale.
June in Gullfoss — workable with trade-offs
Trade-offs · 6/10June averages 5°C (41°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 128 mm this is a genuinely wet month: about 17 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6/10 here, 2nd of 12 months, against 6.6/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
July in Gullfoss — the year's strongest window
Best window · 6.6/10July averages 7°C (45°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 104 mm this is a genuinely wet month: about 16 sunny days in total, and outdoor plans need an indoor fallback.
On our climate-comfort scale this is the top-ranked month of the year for Gullfoss at 6.6/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
August in Gullfoss — workable with trade-offs
Trade-offs · 5.4/10August averages 6°C (43°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 123 mm this is a genuinely wet month: about 9 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.4/10 here, 3rd of 12 months, against 6.6/10 in the destination's best month.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
September in Gullfoss — the hardest end of the year
Hardest · 3.5/10September averages 3°C (38°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
At 144 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 3.5/10 here, 6th of 12 months, against 6.6/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 3.1 points higher on the same scale.
October in Gullfoss — the hardest end of the year
Hardest · 1.8/10October averages -2°C (29°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
At 148 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 1.8/10 here, 7th of 12 months, against 6.6/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 4.8 points higher on the same scale.
November in Gullfoss — the hardest end of the year
Hardest · 1.3/10November averages -3°C (27°F), cold enough that sightseeing works in bursts rather than in one long day on foot.
At 116 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 1.3/10 here, 9th of 12 months, against 6.6/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 5.3 points higher on the same scale.
December in Gullfoss — the hardest end of the year
Hardest · 0.4/10December averages -9°C (16°F) — deep-winter cold that dictates the whole trip: short outdoor stints, indoor plans on standby, and no expectation of long walking days.
At 159 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 0.4/10 here, 11th of 12 months, against 6.6/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, July is materially better in Gullfoss — 6.2 points higher on the same scale.
