Climate and monthly weather forecast
Clifden, Ireland


The climate of Clifden

Situated on Ireland’s west coast, Clifden enjoys a marine west coast climate with warm summers, formally classified as Cfb under the Köppen climate classification. The weather in this part of Ireland is largely influenced by the Atlantic Ocean, resulting in relatively mild temperatures throughout the year, but also high levels of rainfall and humidity. The highest temperatures are typically seen from June to August, when the mercury can reach 18°C (64.4°F). The winter months, specifically December through February, see the lowest temperatures, hovering around 9°C (48.2°F).

Rainfall in Clifden is a constant throughout the year with December proving to be the month with the highest rainfall, amounting to 137mm (5.39"). On the other hand, July sees the lowest rainfall, at 69mm (2.72"). Rainfall days each month are remarkably consistent, staying between 17 and 24 days. The number of daylight hours varies significantly as per the season, with the longest days observed in June at 16.9 hours, and the shortest in December with 7.6 hours. Despite the longer days in the summer months, Clifden experiences the maximum sunshine hours in May, when the town is sunny for an average of 6 hours a day.

The best time to visit Clifden

Taking into account the weather data, the best time to visit Clifden would be between May and July. Temperatures during these months range from 14°C (57.2°F) to 18°C (64.4°F) with the highest number of sunshine hours, peaking at 6 hours per day in May. Additionally, rainfall is relatively low compared to other months, with July experiencing the least amount at 69mm (2.72"). Furthermore, May and June boast a higher UV index, which is a positive note for tourists looking for a bit of warmth.

The worst time to visit Clifden

On the other hand, the least favourable time to visit Clifden would arguably be the winter months of December, January, and February. During this time, temperatures drop to approximately 9°C (48.2°F), and daylight hours are drastically reduced to their shortest, with December seeing only 7.6 hours. Rainfall is also at its highest in December, reaching 137mm (5.39") and the town experiences precipitation for 24 days on average in these months, leading to fewer clear days.

Spring weather in Clifden

Spring in Clifden, encompassing the months of March, April, and May, witnesses a steady rise in temperatures from 10°C (50°F) to 14°C (57.2°F). Despite the increase in temperature, rainfall remains constant with averages around 85mm (3.35") to 76mm (2.99"). The daylight hours extend from 11.9 hours in March to 15.9 hours in May, providing ample opportunity for outdoor activities. The amount of sunshine per day also increases from 3 hours in March to 6 hours in May, providing a pleasant and warm ambience.

Summer weather in Clifden

Summer in Clifden (June to August) tends to be warm with temperatures peaking at 18°C (64.4°F). The rainfall during these months ranges from 71mm (2.8") to 69mm (2.72"). Despite the minor variance in rainfall, these months experience roughly 17 rainy days per month. Though the daylight hours peak at 16.9 hours in June, the amount of sunshine per day drops slightly from 6 hours in May to 4 hours by August.

Autumn weather in Clifden

Autumn months in Clifden (September to November) witness a slight drop in temperatures from 16°C (60.8°F) to 11°C (51.8°F). Rainfall begins to increase, starting from 116mm (4.57") in September to 136mm (5.35") in November. Nevertheless, the town still benefits from 12.7 hours of daylight in September, which shortens to 8.6 hours come November. The number of sunshine hours per day remains steady at around 3 hours.

Winter weather in Clifden

Winter in Clifden, which spans December to February, sees the coldest temperatures of the year, fluctuating between 9°C (48.2°F) and 3°C (37.4°F). These months also witness the highest levels of rainfall, culminating at 137mm (5.39") in December. The volume of rainfall is accompanied by the most rainfall days, with each of these months experiencing precipitation for 24 days on average. Daylight hours are considerably shorter during this season, ranging from 8.2 hours in January to 7.6 hours in December. The number of sunshine hours per day is at its lowest, merely reaching 2 hours in these months.

Weather in January

January in Clifden, Ireland portrays the classic image of a winter month, loaded with chilly temperatures and the distinctive possibility of rain. The lowest sea temperature presents a frigid North Atlantic Ocean with 9.9°C (49.8°F). Weather in January »

Weather in February

February ushers a hint of season change with an increment in temperatures, yet still in the refuge of winter. Rainfall decreases from 137mm (5.39") in January to 85mm (3.35") making it one of the relatively drier winter months. Weather in February »

Weather in March

March announces the arrival of spring with an improvement in temperature and increased daylight. A noticeable temperature transition, compared to the chillier February, makes this month feel slightly warmer. A brighter sun begins its yearly journey with longer presence, melting the last of winter's frost. Weather in March »

Weather in April

April stands out in Clifden's calendar with its increased temperature and decreased rainfall to 66mm (2.6"), signifying a substantial weather shift. The warmth of the spring season becomes firmly established, warding off the last strands of winter. Weather in April »

Weather in May

With its arrival, May sets the stage for the impending summer. Sea temperatures begin to climb, marking the advent of a warmer period. Changes in the weather begin to materialize more concrete signs of summer, albeit interspersed with the reminiscence of spring rains. Weather in May »

Weather in June

June in Clifden signifies the arrival of summer with the longest daylight hours of about 16.9h, signifying the onset of long and sunny days. The temperature shift becomes substantial, marking the transition from spring into more definitive bouts of summer warmth. Weather in June »

Weather in July

July is the height of summer in Clifden, Ireland, bringing with it moderate temperatures and extended daylight. Cheerful sunlight dominates the landscape without the imposition of extreme heat. This month experiences the warmest sea temperatures at 14.6°C (58.3°F), inviting locals and visitors to coastal activities. Weather in July »

Weather in August

Weather in August retains much of July's summer warmth, though with a slight increment in rainfall to 97mm (3.82") heralding an approaching change. A distinct temperate weather persists, ensuring continued outdoor activities. As days get shorter, there's a sense of drawing towards the end of summer. Weather in August »

Weather in September

September marks the end of summer and the beginning of autumn in Clifden. The sea temperature begins to retreat from its peak at 15.3°C (59.5°F) in August to 14.8°C (58.6°F). The transition into autumn becomes noticeable with shorter daylight hours and gradual temperature drop. Weather in September »

Weather in October

October imparts a definitive autumnal feel in the air in Clifden. The earlier signs of fall now turn undeniable with a succession of rainy days, and a sharp drop in sunlight from 4h in September to 3h. The weather starts cooling down substantially, and daylight hours are noticeably shorter. Weather in October »

Weather in November

November nudges the weather chart towards winter in Clifden with lower temperatures and increased rainfall to 136mm (5.35"). Bare trees and frequent showers indicate the impending arrival of the year's final season. As daylight hours continue to diminish, the nights grow increasingly colder. Weather in November »

Weather in December

December in Clifden welcomes winter in its full glory with noticeably colder temperatures. The overall weather conditions become significantly wintry as shorter daylight hours set in with approximately 7.6 hours of daylight. Longer nights dominate, being punctuated by short periods of daily sunshine. Weather in December »

Frequently asked questions

What month is the coldest in Clifden?

In Clifden, the months of January, February and December are known for the lowest temperatures, reaching an average high of 9°C (48.2°F).

What is the rainiest month in Clifden?

The month with the most rainfall is January, when the rain falls for 24 days and typically aggregates up to 137mm (5.39") of precipitation.

How many days does it rain in Clifden?

Throughout the year, in Clifden, Ireland, there are 248 rainfall days, and 1202mm (47.32") of precipitation is accumulated.

When is the lowest UV index in Clifden?

The months with the lowest UV index in Clifden, Ireland, are January and December, with an average maximum UV index of 0.

When is the sea coldest in Clifden?

The month with the coldest seawater in Clifden, Ireland, is March, with an average sea temperature of 9.3°C (48.7°F).

What is the driest month in Clifden?

The month with the least rainfall is April, when the rain falls for 17 days and typically collects 66mm (2.6") of precipitation.

What month has the most sunshine in Clifden?

With an average of 6h of sunshine, May has the most sunshine of the year in Clifden.

When are the longest days in Clifden?

June has the longest days of the year in Clifden, with an average of 16h and 54min of daylight.

What is the month with the highest UV index in Clifden?

The months with the highest UV index in Clifden, Ireland, are June and July, with an average maximum UV index of 6.

What time of the year is the hottest in Clifden?

July and August, with an average high-temperature of 18°C (64.4°F), are warmest months in Clifden.

What is the month with the warmest sea water in Clifden?

With an average sea temperature of 15.3°C (59.5°F), August is the month with the warmest seawater in Clifden.

When is Daylight Saving Time (DST) in Clifden?

On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time starts in Clifden, Ireland, and the time zone changes from IST to GMT. Daylight Saving Time ends on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to IST.

What is the month with the shortest days in Clifden?

With an average of 7h and 36min of daylight, December has the shortest days of the year.

What is the month with the least sunshine in Clifden?

With an average of 1h of sunshine, December has the least sunshine of the year in Clifden, Ireland.

Average temperature
Clifden, Ireland

Average temperature - Clifden, Ireland

The warmest months (with the highest average high temperature) are July and August (18°C).
The months with the lowest average high temperature are January, February and December (9°C).

The months with the highest average low temperature are July and August (11°C).
The coldest months (with the lowest average low temperature) are January and February (3°C).


Average rainfall
Clifden, Ireland

Average rainfall - Clifden, Ireland

The wettest month (with the highest rainfall) is January (137mm).
The driest month (with the least rainfall) is April (66mm).


Average rainfall days
Clifden, Ireland

Average rainfall days - Clifden, Ireland

The months with the highest number of rainy days are January, November and December (24 days).
The months with the least rainy days are April, June and July (17 days).


Average sea temperature
Clifden, Ireland

Average sea temperature - Clifden, Ireland

The best month for swimming (with the highest average sea temperature) is August (15.3°C).
The coldest month (with the lowest average sea temperature) is March (9.3°C).


Average daylight / Average sunshine
Clifden, Ireland

Average daylight / Average sunshine - Clifden, Ireland

The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).

The month with the most sunshine is May (Average sunshine: 6h).
The month with the least sunshine is December (Average sunshine: 1h).


Clifden, Ireland

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