Keflavík Weather in August
August in Keflavík typically sees daytime highs of 13°C (55°F) and nighttime lows of 10°C (50°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Keflavík in August
Based on our climate data of the past 30 years, about 17 days of rain are anticipated, with 106 mm (4.2 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 Keflavík in August
In August, expect moderate temperatures in Keflavík, with highs of 13°C (55°F) and lows of 10°C (50°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 10°C (50°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Keflavík in August
The city usually sees around 154 hours of sunlight, indicating a moderately sunny period.August in Keflavík has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options 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 Keflavík's climate page.
Keflavík Temperature in August
Min Temperature
10°C (50°F)
Max Temperature
13°C (55°F)
Chance of Rain
56%
Precipitation
106 mm (4.2 in)
Rainy days
17 days
Humidity
81% *
Sunshine
154 hours *
Percentage Sunshine
31% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Keflavík typically stay consistent throughout August, with daily highs averaging around 13°C (55°F). Nights are cool, with lows around 8°C (46°F).
Average temperatures in August
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 August
Historical weather for Keflavík in August
Browse day-by-day weather records for Keflavík spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Keflavík historical weather extremes in August
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Keflavík.
- Keflavík recorded its highest August temperature of 26°C (79°F) on August 11, 2004.
- The coldest August day was on August 27, 1992, with a maximum of 7°C (45°F).
- Keflavík registered its coldest August night on August 28, 1982, with temperatures dropping to 3°C (37°F).
Best Places in Iceland in August
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in August →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Keflavík in August
The weather can swing between comfortable and chilly in August, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Expect heavy rainfall, so bring good rain protection and waterproof bags. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Keflavík in August
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 Keflavík's climate page.
Temperature Rainfall Sunshine Humidity
See the full Keflavík climate overview or explore weather in Iceland.
