Keflavík, Iceland experiences average highs of 7°C (45°F) and lows of 4°C (39°F) throughout the year. Rainfall is frequent, averaging about 16 rainy days per month. Average highs have stayed broadly stable across the available records.
Keflavík, Iceland Weather & Climate 2026
Monthly climate averages for Keflavík, Iceland. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Nov 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
2.4/10
Best: June, July, August
UV Index
2
Low
Temperature 7°C / 4°C
Feels Like 3°C / -1°C
Rainy Days 16
Rainfall 108 mm
Sunshine 6 h
Humidity 80%
Wind Speed 31 km/h
Dew Point 2°C
Snow Days 9 days
Frost Days 10 days
Hottest Month
13°C
July
Avg Low10°C
Rain13days
Coldest Month
0°C
January
Avg High3°C
Rain19days
Driest Month
13days
July
Avg High13°C
Avg Low10°C
Windiest Month
37 km/h
February (Gusts 59)
Sea Temperature
4°C – 12°C
Warmest water: August (
12.3°C
)
Worst Time to Visit
Consider avoiding January, February, March, April due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 03:05
Daylight 20.9h
Sunset 23:59
Live conditions—
Keflavík on the map · live conditions
Keflavík, Iceland
- Continent
- Europe
- Country
- Iceland
- City
- Keflavík
- Population
- 15.9K
- Coordinates
- 64.00°, -22.56°
Seasonal Breakdown
Spring
Mar–May
Avg High 6°C
Avg Low 3°C
Rain 16 days/mo
Summer
Jun–Aug
Avg High 12°C
Avg Low 9°C
Rain 13 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 7°C
Avg Low 5°C
Rain 17 days/mo
Winter
Dec–Feb
Avg High 3°C
Avg Low 0°C
Rain 18 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 3°C / 0°C . Feb: 3°C / 0°C . Mar: 4°C / 1°C . Apr: 6°C / 3°C . May: 9°C / 5°C . Jun: 11°C / 8°C . Jul: 13°C / 10°C . Aug: 12°C / 10°C . Sep: 10°C / 7°C . Oct: 7°C / 5°C . Nov: 5°C / 2°C . Dec: 3°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 124 mm. Feb: 122 mm. Mar: 115 mm. Apr: 102 mm. May: 101 mm. Jun: 76 mm. Jul: 71 mm. Aug: 87 mm. Sep: 135 mm. Oct: 134 mm. Nov: 111 mm. Dec: 112 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 77%. Feb: 78%. Mar: 76%. Apr: 78%. May: 78%. Jun: 81%. Jul: 84%. Aug: 83%. Sep: 81%. Oct: 81%. Nov: 79%. Dec: 78%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 37 km/h . Feb: 37 km/h . Mar: 33 km/h . Apr: 30 km/h . May: 28 km/h . Jun: 25 km/h . Jul: 24 km/h . Aug: 25 km/h . Sep: 30 km/h . Oct: 32 km/h . Nov: 33 km/h . Dec: 35 km/h .
Sunshine
Sunshine
Sunshine: Jan: 1h. Feb: 4h. Mar: 7h. Apr: 9h. May: 11h. Jun: 11h. Jul: 11h. Aug: 10h. Sep: 7h. Oct: 5h. Nov: 2h. Dec: 1h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 4°C . Feb: 4°C . Mar: 5°C . Apr: 6°C . May: 8°C . Jun: 10°C . Jul: 12°C . Aug: 12°C . Sep: 11°C . Oct: 8°C . Nov: 7°C . Dec: 5°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 0. Feb: UV 1. Mar: UV 2. Apr: UV 3. May: UV 4. Jun: UV 4. Jul: UV 4. Aug: UV 3. Sep: UV 2. Oct: UV 1. Nov: UV 0. Dec: UV 0.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 16 days. Feb: 14 days. Mar: 14 days. Apr: 5 days. May: 1 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 3 days. Nov: 6 days. Dec: 12 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 9 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 13°C | Jul · 13°C |
| Coldest month | Jan 2025 · -1°C | Jan · 0°C |
| Wettest month | Feb 2025 · 150 mm | Sep · 135 mm |
| Windiest month | Feb 2025 · 40 km/h | Feb · 37 km/h |
Month-by-Month Weather Table
January
Wet 
February
Wet March
Poor April
Poor May
Poor June best
Fair July best
Fair August best
Fair September
Wet October
Wet November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 3°C / 0°C | -3°C / -7°C | 19days (124 mm) Wet | 1.4h Poor | 77% Humid | 0.2 Low | Wet | View Details |
| February | 3°C / 0°C | -3°C / -6°C | 18days (122 mm) Wet | 3.5h Poor | 78% Humid | 0.8 Low | Wet | View Details |
| March | 4°C / 1°C | -2°C / -6°C | 17days (115 mm) Wet | 6.7h Fair | 76% Humid | 1.8 Low | Poor | View Details |
| April | 6°C / 3°C | 2°C / -3°C | 15days (102 mm) Wet | 8.8h Good | 78% Humid | 3.1 Moderate | Poor | View Details |
| May | 9°C / 5°C | 5°C / 0°C | 16days (101 mm) Wet | 11h Excellent | 78% Humid | 4 Moderate | Poor | View Details |
| June best | 11°C / 8°C | 7°C / 4°C | 14days (76 mm) Wet | 10.9h Excellent | 81% Humid | 4.2 Moderate | Fair | View Details |
| July best | 13°C / 10°C | 10°C / 6°C | 13days (71 mm) Wet | 10.6h Excellent | 84% Humid | 4.1 Moderate | Fair | View Details |
| August best | 12°C / 10°C | 10°C / 6°C | 13days (87 mm) Wet | 9.5h Good | 83% Humid | 3.3 Moderate | Fair | View Details |
| September | 10°C / 7°C | 6°C / 3°C | 18days (135 mm) Wet | 7.2h Good | 81% Humid | 2.2 Moderate | Wet | View Details |
| October | 7°C / 5°C | 3°C / -1°C | 18days (134 mm) Wet | 4.5h Fair | 81% Humid | 1 Low | Wet | View Details |
| November | 5°C / 2°C | 0°C / -4°C | 16days (111 mm) Wet | 1.9h Poor | 79% Humid | 0.4 Low | Poor | View Details |
| December | 3°C / 0°C | -2°C / -6°C | 17days (112 mm) Wet | 1.1h Poor | 78% Humid | 0.1 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Keflavík are June, July, August, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Keflavík, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Keflavík is July, with average daytime highs of 13°C (55°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Keflavík is January, with average overnight lows of 0°C (31°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Keflavík is September, averaging 135mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Keflavík runs through January, February, September, October, with the heaviest rainfall in January. Based on 10-year averages for Keflavík.
Keflavík receives approximately 77 sunshine hours per year. The sunniest month is May with around 11 hours. Based on climate data for Keflavík.
The least favorable months to visit Keflavík are January, February, March, April, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider June, July, August instead.
The annual average UV index in Keflavík is 2, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Keflavík is 80%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 8°C (46°F), which most swimmers will find too cold without a wetsuit.
Yes, Keflavík receives snow. Months with snowfall average 9 snow days and 15 cm (6 in) of accumulation, with about 10 frost days during winter.
Average wind speeds in Keflavík are 31 km/h (19 mph). The windiest month is February with peak winds reaching 37 km/h (23 mph) (gusts up to 59 km/h / 37 mph).
Keflavík averages 1 clear-sky days per month with overall cloud cover around 75%. The clearest skies occur in May.
The annual average dew point in Keflavík is 2°C (36°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Keflavík has a Subpolar Oceanic climate, classified as Cfc under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Keflavík ranges from -1°C (30°F) to 3°C (37°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
June is not the best time to visit Keflavík, with a climate score of 5/10. Consider visiting during June, July, August instead for better conditions.
For June in Keflavík, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. With average highs of 11°C (51°F) and 14 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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