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Contents
- The climate of Dublin
- The best time to visit Dublin
- The worst time to visit Dublin
- Spring weather in Dublin
- Summer weather in Dublin
- Autumn weather in Dublin
- Winter weather in Dublin
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
The illuminated Ha Penny Bridge reflected in the water below, in Dublin, Ireland
Climate and monthly weather forecast
The climate of Dublin
Located on the east coast of Ireland, Dublin is recognised by a Cfb classification under the Köppen climate system, indicating a marine west coast climate with a warm summer. This climate type results in mild temperatures throughout the year and no dry seasons.
Temperature fluctuations throughout the year are moderate. During the year, high temperatures range from 8.8°C (47.8°F) in January to 20.2°C (68.4°F) in July, while low temperatures vary from 3.9°C (39°F) in January and February to 13.5°C (56.3°F) in July. Rainfall is a constant companion for Dublin, with a monthly average range between 46mm (1.81") in February and 76mm (2.99") in October. The occurrence of precipitation ranges from 9 to 12 days monthly.
Dublin's daylight hours extend from 7.6 hours in December to 16.9 hours in June, bearing a direct impact on the hours of sunshine enjoyed. December offers the fewest hours of sunshine, a stark 1.7 hours, increasing gradually to the maximum 6.3 hours in May. December and January record the lowest UV index, rising up to 6 between June and July.
If water activities pique the interest, it would be valuable to note that the coldest sea temperatures of 8.4°C (47.1°F) occur in March, warming up to 14.9°C (58.8°F) in August before plunging again. The unique pattern that Dublin's weather follows is its consistent precipitation throughout the year, with no distinct dry period.
Temperature fluctuations throughout the year are moderate. During the year, high temperatures range from 8.8°C (47.8°F) in January to 20.2°C (68.4°F) in July, while low temperatures vary from 3.9°C (39°F) in January and February to 13.5°C (56.3°F) in July. Rainfall is a constant companion for Dublin, with a monthly average range between 46mm (1.81") in February and 76mm (2.99") in October. The occurrence of precipitation ranges from 9 to 12 days monthly.
Dublin's daylight hours extend from 7.6 hours in December to 16.9 hours in June, bearing a direct impact on the hours of sunshine enjoyed. December offers the fewest hours of sunshine, a stark 1.7 hours, increasing gradually to the maximum 6.3 hours in May. December and January record the lowest UV index, rising up to 6 between June and July.
If water activities pique the interest, it would be valuable to note that the coldest sea temperatures of 8.4°C (47.1°F) occur in March, warming up to 14.9°C (58.8°F) in August before plunging again. The unique pattern that Dublin's weather follows is its consistent precipitation throughout the year, with no distinct dry period.
The best time to visit Dublin
Given the mild, yet consistent, rainfall and relatively warmer temperatures, the period from June to August emerges as the best time to visit Dublin. During this period, high temperatures maintain at around 18°C (64.4°F) to 20.2°C (68.4°F) and low temperatures at 11.6°C (52.9°F) to 13.5°C (56.3°F). The sea reaches its warmest temperatures between 14.1°C (57.4°F) and 14.9°C (58.8°F), making it pleasant for water activities. With daylight hours extending up to 16.9 hours and the UV index reaching its peak, visitors can enjoy extended sightseeing and outdoor activities.
The worst time to visit Dublin
Being a city that experiences consistent rainfall, determining the worst time to visit can be subjective. However, considering higher levels of rainfall, fewer daylight hours, and lower temperatures, the period from October to January may offer more challenges to visitors. During these months temperatures plummet to lows between 3.9°C (39°F) to 8.8°C (47.8°F) with highs that barely reach double digits. Sea temperatures drop to between 9.6°C (49.3°F) to 13.1°C (55.6°F). Furthermore, the soaking showers increase, reaching up to 76mm (2.99") in October with the advent of autumn.
Spring weather in Dublin
Instruments denote a moderate warming trend during spring, with high temperatures increasing from 8.9°C (48°F) in February to 15.2°C (59.4°F) in May and low temperatures escalating from 3.9°C (39°F) to 9°C (48.2°F). Rainfall fluctuates moderately, with March receiving around 52mm (2.05"), decreasing slightly to 50mm (1.97") in April, before increasing to 58mm (2.28") in May. Sea temperatures record a slow increase from 8.8°C (47.8°F) in February to 10.4°C (50.7°F) by May.
Summer weather in Dublin
The summer months offer the warmest weather, presenting high temperatures ranging from 18°C (64.4°F) in June to 20.2°C (68.4°F) in July, then slightly cooling to 19.6°C (67.3°F) in August. Correspondingly, low temperatures rise from 11.6°C (52.9°F) in June to 13.5°C (56.3°F) in July then maintain at 13.3°C (55.9°F) in August. The rainfall levels moderately, reaching a mean of 59mm (2.32") in June, minimising to 51mm (2.01") in July and escalating to 65mm (2.56") by August. Sea temperatures provide comfort between 12.3°C (54.1°F) to 14.9°C (58.8°F).
Autumn weather in Dublin
Autumn manifests a cooling trend with high temperatures dropping from 17.3°C (63.1°F) in September to 11°C (51.8°F) in November. Low temperatures oscillate between 11.4°C (52.5°F) to 6.2°C (43.2°F) in the same period. Rainfall surges from 57mm (2.24") in September to 69mm (2.72") in November. A drop in sea temperature is recorded from 14.8°C (58.6°F) to 13.1°C (55.6°F) through the autumn months.
Winter weather in Dublin
Winter experiences the chilliest conditions in Dublin, with high temperatures averaging between 9.3°C (48.7°F) to 8.8°C (47.8°F) and low temperatures fluctuating from 4.5°C (40.1°F) to 3.9°C (39°F). Rainfall during winter is notably consistent, indicating between 69mm (2.72") to 63mm (2.48"). Sea temperatures sink to their lowest, continuing from 13.1°C (55.6°F) in November, meandering through winter to 9.6°C (49.3°F) by the end of January.
Weather in January
The chill of winter grips Dublin in the month of January, making it one of the coldest times of the year. The low temperatures can reach 3.9°C (39°F), particularly during early morning and late-night hours. Although daylight is limited, city experiences a unique blend of winter charm. Weather in January »
Weather in February
As February strides in, the weather in Dublin sees a minor lift in temperatures from its predecessor, January. Still firmly in winter's grasp, there are frequent spells of rain, with rainfall days climbing to 10 in this month. Weather in February »
Weather in March
Welcoming March means bidding adieu to the harshest winter periods and greeting the hints of an approaching spring in Dublin. The temperatures, on average, hover around 10.7°C (51.3°F), injecting a mild yet welcome warmth into the climate. Weather in March »
Weather in April
In April, Dublin starts to truly shake off winter's cold hand as temperatures become increasingly mild. With the low temperature sitting at a fairly comfortable 6.4°C (43.5°F), the city's flora blossoms, mirroring the onset of spring. Weather in April »
Weather in May
The month of May symbolizes the commencement of the warm season within Dublin, with the weather getting noticeably warmer. Temperatures exhibit a comforting increase to a high of around 15.2°C (59.4°F). Despite the warmth, rainfall persists, a remnant of Dublin’s temperate oceanic climate. Weather in May »
Weather in June
June is when the summer season truly comes into effect in Dublin, with temperatures ticking upward and daylight hours peaking. The month sees an inviting sea temperature of 12.3°C (54.1°F), implying the ideal time for coastal escapades. Weather in June »
Weather in July
July proudly represents the crux of summer within Dublin, bringing with it welcoming waves of warmth. The cities’ sea temperature peaks at 14.1°C (57.4°F) during this couple of months offering idyllic sunset beach walks. What is a Dublin summer without a splash of Irish rain? Therefore, despite the summer peeking, be prepared to face the occasional yet inevitable rain showers. Weather in July »
Weather in August
August continues the reign of summer in Dublin, offering a mild weather and a pleasant temperature spectrum. While the average high temperature slightly drops to 19.6°C (67.3°F), the radiance of summer remains undisturbed. Evening strolls along the sea coast become even more inviting as the sea temperature reaches a delightful high. Weather in August »
Weather in September
Dublin in September witnesses a gradual descent in temperature, indicating the onset of the autumn season. Yet, the sea maintains a comfortable 14.8°C (58.6°F) that blends seamlessly with the cooling air. As mildness infuses the air, the city changes hue, shrugging on the colors of fall. Weather in September »
Weather in October
In October, autumn flaunts its full form in Dublin, modulating the weather into a cooler existence. The curtain of rain raises higher to 76mm (2.99"), the highest rainfall recorded across the months. As the browns and reds of fall pervade the city's landscapes, the coolness seeping into the air becomes more apparent. Weather in October »
Weather in November
November signifies the advent of winter, with the temperature taper dropping, making the ambient air noticeably chillier. Rainfall measures up to 69mm (2.72") within this period, contributing to the colder air. As night descends earlier and the daylight hours reduce, the winter vibe intensifies. Weather in November »
Weather in December
With December, winter is in full swing in Dublin, and temperatures keep to the colder side of the spectrum. The city's low temperature sinks to around 4.5°C (40.1°F), the lowest during the year. Clouds often gather, adding to the overcast atmosphere and scaling up the winter charm. Weather in December »
Updated: Jan 27, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Dublin?
The coldest time of the year is January, with temperatures averaging a high of 8.8°C (47.8°F) and a low of 3.9°C (39°F).
How much does it rain in Dublin?
Throughout the year, in Dublin, there are 128 rainfall days, and 714mm (28.11") of precipitation is accumulated.
When is the lowest UV index in Dublin?
The months with the lowest UV index in Dublin are January and December, with an average maximum UV index of 0.
What is the driest month in Dublin?
February is the month with the least rainfall in Dublin, Ireland. Rain falls for 10 days and accumulates 46mm (1.81") of precipitation.
When is the sea coldest in Dublin?
The month with the coldest seawater in Dublin, Ireland, is March, with an average sea temperature of 8.4°C (47.1°F).
What month has the most sunshine in Dublin?
May has the most sunshine of the year, with an average of 6.3h of sunshine.
When are the longest days in Dublin?
The month with the longest days in Dublin is June, with an average of 16h and 54min of daylight.
What is the month with the highest UV index in Dublin?
June and July, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest in Dublin?
July, with its average high-temperature of 20.2°C (68.4°F) and an average low-temperature of 13.5°C (56.3°F), holds the record as the warmest month in Dublin.
When is the sea warmest in Dublin?
The month with the warmest seawater in Dublin is August, with an average sea temperature of 14.9°C (58.8°F).
What is the rainiest month in Dublin?
The month with the most rainfall in Dublin, Ireland, is October, when the rain falls for 12 days and typically aggregates up to 76mm (2.99") of precipitation.
When is Daylight Saving Time (DST) in Dublin?
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time starts, 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 Dublin?
The month with the shortest days in Dublin is December, with an average of 7h and 36min of daylight.
What is the month with the least sunshine in Dublin?
The month with the least sunshine in Dublin is December, with an average of 1.7h of sunshine.
Average temperature
Dublin, Ireland
The warmest month (with the highest average high temperature) is July (20.2°C).
The month with the lowest average high temperature is January (8.8°C).
The month with the highest average low temperature is July (13.5°C).
The coldest months (with the lowest average low temperature) are January and February (3.9°C).
Average rainfall
Dublin, Ireland
- Average rainfall in January:
62.6mm - Average rainfall in February:
46.1mm - Average rainfall in March:
51.8mm - Average rainfall in April:
50.2mm - Average rainfall in May:
57.9mm - Average rainfall in June:
59.2mm
- Average rainfall in July:
50.5mm - Average rainfall in August:
65.3mm - Average rainfall in September:
56.7mm - Average rainfall in October:
76mm - Average rainfall in November:
69.4mm - Average rainfall in December:
68.7mm
The wettest month (with the highest rainfall) is October (76mm).
The driest month (with the least rainfall) is February (46.1mm).
Average rainfall days
Dublin, Ireland
- Average rainfall days in January:
12 days - Average rainfall days in February:
10 days - Average rainfall days in March:
11 days - Average rainfall days in April:
11 days - Average rainfall days in May:
11 days - Average rainfall days in June:
9 days
- Average rainfall days in July:
10 days - Average rainfall days in August:
10 days - Average rainfall days in September:
9 days - Average rainfall days in October:
12 days - Average rainfall days in November:
11 days - Average rainfall days in December:
12 days
The months with the highest number of rainy days are January, October and December (12 days).
The months with the least rainy days are June and September (9 days).
Average sea temperature
Dublin, Ireland
The best month for swimming (with the highest average sea temperature) is August (14.9°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).
Average daylight / Average sunshine
Dublin, Ireland
- Average daylight in January:
8h and 1min - Average daylight in February:
9h and 5min - Average daylight in March:
11h and 5min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 5min - Average daylight in June:
16h and 5min
- Average daylight in July:
16h and 2min - Average daylight in August:
14h and 4min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
8h and 4min - Average daylight in December:
7h and 4min
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).
- Average sunshine in January:
1h and 5min - Average sunshine in February:
2h and 4min - Average sunshine in March:
3h and 3min - Average sunshine in April:
5h and 2min - Average sunshine in May:
6h and 2min - Average sunshine in June:
6h and 0min
- Average sunshine in July:
5h and 2min - Average sunshine in August:
5h and 1min - Average sunshine in September:
4h and 2min - Average sunshine in October:
3h and 2min - Average sunshine in November:
2h and 2min - Average sunshine in December:
1h and 4min
The month with the most sunshine is May (Average sunshine: 6h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average UV index
Dublin, Ireland
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 0).
