Donegal Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Donegal, Donegal County, Ireland. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's now guide you through the details for a complete overview.
Donegal has a relatively rain/snowy climate with high precipitation levels, averaging 1393 mm (55 in) of rain/snowfall annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Precipitation levels in Donegal remain relatively steady throughout the year. December has the most rain, with 132 mm (5.2 in) over 24 days. In April, this drops slightly to 96 mm (3.8 in), making the city's climate fairly predictable.
December, the wettest month, has a maximum daytime temperature of 9°C (48°F). The city receives 39 hours of sunshine in this period. During the driest month April you can expect a temperature of 13°C (55°F). For more detailed insights into the city's temperatures, visit our Donegal Temperature page.
Explore Donegal's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Donegal spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Ireland: City Comparison
The map below shows the annual precipitation across Ireland. You can also select the different months in case you are interested in a specific month.
heavy rainfall
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Donegal vs World: Rainfall Compared
Donegal's average annual precipitation is 1393 mm (55 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.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
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.
- "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 Donegal's weather, including sunshine hours, humidity levels, and temperature data, visit our Donegal Climate page.
