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This page shows both the average monthly rainfall and the number of rainy days in Grundarfjordur, West Iceland, Iceland. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's explore the details to provide you with a complete overview.
Grundarfjordur has a relatively rain/snowy climate with high precipitation levels, averaging 1238 mm (49 in) of rain/snowfall annually.
Significant seasonal changes in precipitation occur throughout the year. During the wettest month, September receives substantial rainfall, averaging 136 mm (5.4 in) of precipitation, recorded across 17 rainy days.
In contrast, the driest month, June brings less rainfall, with 59 mm (2.3 in) over 15 rainy days.
September, the wettest month, has a maximum daytime temperature of 11°C (52°F). The city receives 106 hours of sunshine in this period. During the driest month June you can expect a temperature of 11°C (52°F). For more detailed insights into the city's temperatures, visit our Grundarfjordur Temperature page.
Average daily rainfall for each day of the month based on long-term records. 50-year average (1976-2025)
Browse day-by-day precipitation records for Grundarfjordur spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
The map below shows the annual precipitation across Iceland. You can also select the different months in case you are interested in a specific month.
Grundarfjordur's average annual precipitation is 1238 mm (49 in). Let's compare this to some popular worldwide tourist destinations:
Athens, Greece, receives an average annual precipitation of 400 mm (16 in), making it one of the drier Mediterranean climates with rainfall mostly in winter.
Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
The proximity of a location to a large body of water can significantly affect its rainfall patterns:
For more detailed information about Grundarfjordur's weather, including sunshine hours, humidity levels, and temperature data, visit our Grundarfjordur Climate page.
Pick a month to see the average temperature, rainfall and sunshine in Grundarfjordur - and find the best time to visit.
Temperature Rainfall Sunshine Humidity
See the full Grundarfjordur climate overview or explore weather in Iceland.
Where to go in October - average daytime high across popular destinations.
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