Reykjahlíð Temperature by Month

The average annual maximum temperature in Reykjahlíð, North Iceland, Iceland is 6°C (43°F), with daytime highs ranging from 1°C (34°F) in December to 15°C (59°F) in July. This page covers monthly averages, day-night differences, and how Reykjahlíð compares to cities worldwide.

Visitors to Reykjahlíð will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 7°C (45°F) in July to -6°C (21°F) in December.

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

Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. July, the city's warmest month, sees 154 hours of sunshine.

The chart below shows the average temperature throughout the year:

Reykjahlíð's average annual maximum temperature is 6°C (43°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

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

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

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 Reykjahlíð, December is the coolest month, with average highs of 1°C (34°F) and humidity around 79%, considered 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.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

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