Llanllyfni Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Llanllyfni, Gwynedd, United Kingdom. This average is based on long-term data collected between 1990 and 2020. Now, let's explore all the details to give you a full picture.

Llanllyfni is known for its substantial rainfall, with annual precipitation reaching 1551 mm (61 in).

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Llanllyfni experiences moderate seasonal variation in rainfall, with monthly averages ranging from 175 mm (6.9 in) in December, the wettest month, and 93 mm (3.7 in) in May, the driest month.

December, the wettest month, has a maximum daytime temperature of 9°C (48°F). The city receives 26 hours of sunshine in this period. During the driest month May you can expect a temperature of 15°C (59°F). For more detailed insights into the city's temperatures, visit our Llanllyfni Temperature page.

Annual Rainfall in the United Kingdom: City Comparison

The map below shows the annual precipitation across the United Kingdom. You can also select the different months in case you are interested in a specific month.

Annual

Annual

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Legend

heavy rainfall

high

moderate

low

almost none

Heavy annual rainfall has been defined as more than 1000 mm (39 in) precipitation. High: 600 mm (24 in) to 1000 mm (39 in). Moderate: 250 mm (9.8 in) to 600 mm (24 in). Low: less than 250 mm (9.8 in).

Llanllyfni vs World: Rainfall Compared

Llanllyfni's average annual precipitation is 1551 mm (61 in). Let's compare this to some popular worldwide tourist destinations:

In Toronto, Canada, annual precipitation averages 964 mm (38 in), with snowy winters and rainy summers.

Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.

Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.

How is Precipitation Measured?

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.

Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.

Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

Interesting weather facts

"Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.

For more detailed information about Llanllyfni's weather, including sunshine hours, humidity levels, and temperature data, visit our Llanllyfni Climate page.

Current rainfall in Llanllyfni

10-Day Forecast