Grundarfjordur Temperature by Month

Grundarfjordur in West Iceland, Iceland sees moderate seasonal temperature shifts, with daytime highs between 3°C (37°F) in February and 13°C (55°F) in July, averaging 7°C (45°F) annually. Explore the full monthly breakdown below.

The weather in Grundarfjordur changes moderately throughout the year, offering enough variation to appreciate each season. Nights are cooler, with lows ranging from 9°C (48°F) to -1°C (30°F).

The chart below illustrates the average maximum day and minimum night temperatures in Grundarfjordur by month:

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. July, the warmest month, gets 180 hours of sunshine.

The chart below shows the average temperature throughout the year:

Grundarfjordur's average annual maximum temperature is 7°C (45°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In Grundarfjordur, February is the coolest month, with average highs of 3°C (37°F) and humidity around 80%, considered very high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Grundarfjordur this rarely lasts long on the ground.

For more on Grundarfjordur's weather, including monthly rainfall, sunshine hours, and humidity, visit our Grundarfjordur climate page.