Climate and monthly weather forecastCarlow, Ireland
Climate and monthly weather forecast
The climate of Carlow
Nestled in the southeastern region of Ireland, Carlow features a Marine West Coast climate, or a Cfb classification according to the Köppen climate system. This pertains to climates that generally exhibit cool to mild temperatures throughout the year, coupled with considerable humidity and rainfall. Close proximity to the Irish Sea influences the area's climate significantly, providing a significant moderating effect on temperatures.An observation of the climatological data reveals that temperature averages fluctuate from 1.6°C (34.9°F) to 17.8°C (64°F) over the year, indicating a temperate climate. Accompanying this are annual patterns of relative humidity that largely remain between 86% and 92%, signifying a rather humid atmosphere throughout the year. With regard to precipitation, the pattern is fairly dispersed, with the monthly rainfall quantities varying from 16mm (0.63") to 41mm (1.61"). Across the year, rainfall days per month range from a low of 11.3 up to 18.1, inferring a high probability of rain in any given month.
Interestingly, snowfall is not a significant climatological feature in Carlow, marked by the presence of snow in only three months of the year. It peaks in February with 10mm (0.39") and December experiences 12mm (0.47") of snowfall, reflecting the seasonality of snowfall. In terms of daylight, the region experiences the shortest days in December with 7.7 hours, whereas June presents the longest daylight hours of 16.8.
The best time to visit Carlow
Considering the climate parameters, the best time to visit Carlow appears to be the summer months of June to August. During these months, the highest average temperatures, which range from 16.8°C (62.2°F) to 17.8°C (64°F), are recorded. Alongside this, the highest daylight hours fluctuate between 14.7 hours to 16.8 hours permitting more time to explore the city and its countryside. Despite the increasing chances of rainfall during these months, the quantity of rainfall does not exceed 32mm (1.26"), indicating light to moderate rain showers rather than heavy downpours.The worst time to visit Carlow
Conversely, Carlow's least favorable period for visitation would likely be the winter months from December to February. During this period, Carlow experiences its lowest temperatures ranging from a high of 7.2°C (45°F) to a chilly low of 1.6°C (34.9°F). Furthermore, this period also corresponds with the shortest daylight hours, from a low of 7.7 hours in December to just 9.9 hours in February. Precipitation is relatively high in winter with up to 41mm (1.61") in November and 27mm (1.06") in December, coupled with considerable snowfall, reinforcing the reasons for it being a less popular time to visit.Spring weather in Carlow
Spring weather in Carlow transitions from the chill of winter to a more pleasant climate. The season begins with an average low temperature of 1.8°C (35.2°F) in March, which gradually increases to reach a comfortable high of 11.6°C (52.9°F) by May. Besides temperature, daylight hours also increase from 11.9 hours in March up to 15.8 hours in May. Rain is frequent throughout the spring months with an average rainfall of 16mm (0.63") to 20mm (0.79"), and the number of rainfall days is around 14 days per month.Summer weather in Carlow
Summer brings the warmest temperatures to Carlow, with highs peaking between 13.8°C (56.8°F) and 17.8°C (64°F). Daylight hours are at their longest, reaching 16.8 hours in June, providing ample time for outdoor activities. Despite being the warmest months, summer also brings the highest number of rainfall days with a peak of up to 18.1 days in July, characterized by light showers.Autumn weather in Carlow
Autumn is a transition period, with temperatures decreasing gradually from a high of 15.5°C (59.9°F) in September to a high of 9.1°C (48.4°F) by November. Concurrently, rainfall increases, culminating in the highest rainfall volume of 41mm (1.61") in November. Daylight hours decrease substantially from 12.7 hours in September to merely 8.7 hours by November, indicating shorter days and longer nights.Winter weather in Carlow
Winter in Carlow brings the coldest months, with temperatures ranging from 2.5°C (36.5°F) to 7.2°C (45°F). Snowfall occurs only in these months, adding to the winter charm. Despite it being the coldest season, the number of rainfall days lessens to around thirteen days per month. However, daylight hours are at their shortest during winter, with December recording the least number of daylight hours at 7.7. It is a stark contrast as compared to the long daylight hours experienced during the summer months.Weather in January
In Carlow, Ireland, the month of January is characterized by its cold and damp conditions. With the highest relative humidity on record at 91%, the moist, chilly air can often result in misty mornings and frosty evenings. The average high temperature slowly starts showing signs of increase, indicating an impending transition. Weather in January »Weather in February
Turning to February, it becomes apparent that winter continues its reign over Carlow. The city experiences a slight increase in daily sunshine hours, up to 9.9 hours, welcoming the notion of approaching spring. Frosty mornings become a common occurrence due to the minimal change in minimum temperatures. Weather in February »Weather in March
March heralds the onset of spring in Carlow, with noticeable increases in daylight hours and temperature. However, the winds start to pick up speed, averaging at 16.9km/h (10.5mph), adding a brisk, chilly air to the otherwise warming weather. Weather in March »Weather in April
April witnesses a notable shift in Carlow's weather, morphing from chilly spring to a more temperate climate. The sun stays out longer, with daylight hours extending to 14 hours on average. Mild showers are quite frequent during this month, ensuring that the city's landscapes retain their lush and vibrant hues. Weather in April »Weather in May
In Carlow, May bridges the gap between spring and summer. As the days get longer, reaching up to 15.8 hours of daylight, the city’s weather becomes increasingly pleasant. The sweeping landscapes, featuring Castledermot Round Tower and Duckett's Grove, bask in the warm sunshine that dominates most of the days in this month. Weather in May »Weather in June
June sets the stage for summer in Carlow, with daily sunshine extending up to a maximum of 16.8 hours. The temperatures begin to mildly peak, reaching their highest average at 16.8°C (62.2°F). Despite this relative heat, there is very little variation from the usual wind conditions, averaging at 13km/h (8.1mph). Weather in June »Weather in July
July illuminates Carlow in its complete summer glory, exhibiting the longest daylight hours in the year, peaking at 16.3 hours. The breeze cools at 12.7km/h (7.9mph), ensuring comfortable conditions despite the climb in temperature. Weather in July »Weather in August
August in Carlow continues the comfortable summer spell, with the temperature averaging at 17.4°C (63.3°F) in high and 10°C (50°F) in low. The daylight hours start to reduce, marking the gradual transition from summer to fall. Weather in August »Weather in September
September's arrival in Carlow signifies fall's inception. The daylight hours reduce further to 12.7 hours, indicating shorter durations of sunshine. Despite the decrease in sunshine, Carlow continues to showcase its beauty across the historic sites. Weather in September »Weather in October
October ushers in the chill of winter in Carlow, with nighttime temperatures dropping to an average low of 6.8°C (44.2°F). Despite the growing chill, the city does not lose its charm, with autumnal hues dominating the landscape. Weather in October »Weather in November
November brings a significant transition in Carlow's weather as winter begins to set in. The snow starts to mark its presence with 12mm (0.47") of total snowfall recorded during this month. The temperatures plunge further, making for frosty evenings and mornings. Weather in November »Weather in December
Winter in Carlow claims full reign in December with temperatures dropping to an average low of 2.5°C (36.5°F). Snowfall records a drop from November to 4mm (0.16") cumulatively. The daylight hours reduce to just 7.7 hours, signaling the shortest day length of the year. 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
The coldest temperatures in Carlow, Ireland, occur during January, when averages reach a peak of 7°C (44.6°F) and a low of 1.8°C (35.2°F).
Throughout the year, in Carlow, there are 167.6 rainfall days, and 283mm (11.14") of precipitation is accumulated.
Months with snowfall are January through March, November and December.
Throughout the year, there are 7.4 snowfall days, and 38mm (1.5") of snow is accumulated.
The months with the lowest UV index in Carlow are January through March, November and December, with an average maximum UV index of 2.
The months with the least sunshine are February, November and December, with an average of 3.8h of sunshine.
The month with the least rainfall in Carlow is March, when the rain falls for 13.3 days and typically collects 16mm (0.63") of precipitation.
With an average relative humidity of 86%, April is the least humid month in Carlow, Ireland.
April through October are months without snowfall in Carlow, Ireland.
With an average of 6.4h of sunshine, May has the most sunshine of the year.
The month with the longest days in Carlow, Ireland, is June, with an average of 16h and 48min of daylight.
June and August, with an average maximum UV index of 4, are months with the highest UV index in Carlow.
July, on average, is the warmest month in Carlow, registering a high temperature of 17.8°C (64°F) and a low of 10.6°C (51.1°F).
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time starts in Carlow, 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.
November and December, with an average relative humidity of 92%, are most humid months in Carlow.
November is the month with the most rainfall in Carlow, Ireland. Rain falls for 13.4 days and accumulates 41mm (1.61") of precipitation.
November is the month with the most snowfall. Snow falls for 0.3 days and accumulates 12mm (0.47") of snow.
The month with the shortest days is December, with an average of 7h and 42min of daylight.
Average temperature
Carlow, Ireland
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is January (7°C).
The month with the highest average low temperature is July (10.6°C).
The coldest month (with the lowest average low temperature) is February (1.6°C).
Average pressure
Carlow, Ireland
- Average pressure in January:
1011.9mbar - Average pressure in February:
1011.5mbar - Average pressure in March:
1014.4mbar - Average pressure in April:
1014.8mbar - Average pressure in May:
1016.1mbar - Average pressure in June:
1015.5mbar
- Average pressure in July:
1014.3mbar - Average pressure in August:
1013.2mbar - Average pressure in September:
1015.7mbar - Average pressure in October:
1012.9mbar - Average pressure in November:
1008.5mbar - Average pressure in December:
1011.5mbar
The month with the highest atmospheric pressure is May (1016.1mbar).
The month with the lowest atmospheric pressure is November (1008.5mbar).
Average wind speed
Carlow, Ireland
- Average wind speed in January:
18.8km/h - Average wind speed in February:
19km/h - Average wind speed in March:
16.9km/h - Average wind speed in April:
14.7km/h - Average wind speed in May:
14.6km/h - Average wind speed in June:
13km/h
- Average wind speed in July:
12.7km/h - Average wind speed in August:
13.7km/h - Average wind speed in September:
13.9km/h - Average wind speed in October:
15.1km/h - Average wind speed in November:
17km/h - Average wind speed in December:
18.9km/h
The windiest month (with the highest average wind speed) is February (19km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity
Carlow, Ireland
The months with the highest relative humidity are November and December (92%).
The month with the lowest relative humidity is April (86%).
Average rainfall
Carlow, Ireland
The wettest month (with the highest rainfall) is November (41mm).
The driest month (with the least rainfall) is March (16mm).
Average rainfall days
Carlow, Ireland
- Average rainfall days in January:
12.9 days - Average rainfall days in February:
12.6 days - Average rainfall days in March:
13.3 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
14.5 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
18.1 days - Average rainfall days in August:
17.2 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
12.7 days - Average rainfall days in November:
13.4 days - Average rainfall days in December:
13.7 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is September (11.3 days).
Average snowfall
Carlow, Ireland
The month with the highest snowfall is November (12mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Carlow, Ireland
- Average snowfall days in January:
1.9 days - Average snowfall days in February:
2.1 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.3 days - Average snowfall days in December:
1.2 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Carlow, Ireland
- Average daylight in January:
8h and 18min - Average daylight in February:
9h and 54min - Average daylight in March:
11h and 54min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 48min - Average daylight in June:
16h and 48min
- Average daylight in July:
16h and 18min - Average daylight in August:
14h and 42min - Average daylight in September:
12h and 42min - Average daylight in October:
10h and 36min - Average daylight in November:
8h and 42min - Average daylight in December:
7h and 42min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in January:
3h and 54min - Average sunshine in February:
3h and 48min - Average sunshine in March:
5h and 6min - Average sunshine in April:
6h and 18min - Average sunshine in May:
6h and 24min - Average sunshine in June:
6h and 12min
- Average sunshine in July:
5h and 42min - Average sunshine in August:
5h and 42min - Average sunshine in September:
5h and 54min - Average sunshine in October:
4h and 0min - Average sunshine in November:
3h and 48min - Average sunshine in December:
3h and 48min
The month with the most sunshine is May (Average sunshine: 6h and 24min).
The months with the least sunshine are February, November and December (Average sunshine: 3h and 48min).
Average sunshine days
Carlow, Ireland
- Average sunshine days in January:
13.3 days - Average sunshine days in February:
11.4 days - Average sunshine days in March:
13.1 days - Average sunshine days in April:
12.2 days - Average sunshine days in May:
11.4 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
7.3 days - Average sunshine days in August:
7.5 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
13.8 days - Average sunshine days in November:
13.9 days - Average sunshine days in December:
12.3 days
The month with the most sunshine days is November (13.9 days).
The month with the least sunshine days is July (7.3 days).
Average UV index
Carlow, Ireland
The months with the highest UV index are June and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Carlow, Ireland
The month with the most cloud cover is July (Cloud cover 68).
The month with the least cloud cover is April (Cloud cover 58).
Average visibility
Carlow, Ireland
The months with the highest visibility are February, March and December (9km).
The months with the lowest visibility are July, August and September (7km).
