Climate and monthly weather forecastMertert, Luxembourg
Climate and monthly weather forecast
The climate of Mertert
Geographically located in the heartland of Europe, Mertert in Luxembourg outputs a moderate Marine West Coast Climate (Cfb) according to the Köppen system. This predominant climate classification unveils the characteristic climatic patterns observed in the region.Throughout the year, there are substantial differences in the various weather parameters. Temperatures exhibit a noticeable variation, with the lowest average dip down to -1.3°C (29.7°F) in the winter and soar up to 22.7°C (72.9°F) during peak summer. As per the data, a shift from chilled to warmer months happens between January to July. Precipitation accounts for an average monthly rainfall between 25mm (0.98") in July and 69mm (2.72") in December.
Humidity levels push the scale at around 76% during the drier months of April and August, and peak at 91% in December, reinforcing the city's marine climate nature. Days with snowfall are quite frequent during winter, correspondingly peaking in December and January with 66mm (2.6") each month. Significant to note is that throughout the year, wind speeds stays between 9.4km/h (5.8mph) to 14.2km/h (8.8mph) with gusts varying between 14.4km/h (8.9mph) to 23.1km/h (14.4mph).
The best time to visit Mertert
Timing is crucial when planning a visit to Mertert. The period from May to September is the most favorable timeframe, presenting an ambient experience of the city. During this period, temperatures fall between 16.8°C (62.2°F) to 22.7°C (72.9°F), and rainfall measures lessen down to 25mm (0.98") in July, creating relatively bright and dry climatic conditions. The ample daylight of about 15 hours and sun exposure of about 8 to 10 hours per day add to the overall appeal of this period.The worst time to visit Mertert
A journey through Mertert might not be hospitable during the cold months of December, January, and February. Temperatures dip low between -1.3°C (29.7°F) to 4.3°C (39.7°F) and precipitation hits the high end of the scale at 69mm (2.72") in December. Days with snowfall increase and visibility is limited to 7km (4.3mi) to 8km (5mi), together provoking a rather intimidating climatic scenario.Spring weather in Mertert
Spring leaps in with milder temperatures, starting with a low of 1.3°C (34.3°F) in March and peaking at 14.2°C (57.6°F) by the close of May. Rainfall during this season varies between 35mm (1.38") to 44mm (1.73") monthly. Corresponding daylight hours improve, providing between nearly 12 to 15.4 hours of light daily, while actual sunshine hours sees a steady increase from 6 hours to 8.7 hours daily.Summer weather in Mertert
Summers extend a warm welcome with temperatures soaring from 16.8°C (62.2°F) in June to 22.7°C (72.9°F) in July. Simultaneously, rainfall decreases dramatically down to 25mm (0.98") in July, the lowest throughout the year. Humidity levels moderately fluctuate in the early 80s percentile, but sunlight exposure peaks to up to 9.8 hours a day in July. Daily daylight duration remains in the vicinity of 15 hours to 16.2 hours.Autumn weather in Mertert
Autumn in Mertert narrates a story of gradual coolness with temperatures descending from 18.5°C (65.3°F) in September to 7.9°C (46.2°F) in November. While rainfall showcases a mild surge up to 48mm (1.89") in November, daylight hours contract to 9.1 hours and actual sunshine hours sees a steady decline to 3.8 hours per day by the end of the season.Winter weather in Mertert
Winter hits the region with temperatures plunging in the range of 4.5°C (40.1°F) to -1.3°C (29.7°F) while humidity levels escalate up to 91%. Snowfall is rather frequent, triggering a white winter with 66mm (2.6") in December and January. The wintry blast is accompanied with the shortest daylight duration of 8 hours to 9.1 hours, challenging the prospects of outdoor activities.Weather in January
January, the heart of winter in Mertert, Luxembourg, is characterized mainly by low temperatures and a fair share of rainfall. A distinctive feature of this month is the substantial snowfall of 66mm (2.6"), affecting weather conditions and daily routines. Weather in January »Weather in February
Moving into February, the weather conditions in Mertert exhibit slight changes. Although cold temperatures persist, there is a decrease in snowfall compared with January, nudging the city towards early signs of spring. This month, days begin to gradually elongate with an increase in sunshine duration. Weather in February »Weather in March
March witnesses the start of the transitional season in Mertert, signaling the retreat of winter. There is an appreciable increase in temperatures, with a high of 9.1°C (48.4°F), hinting at the approach of warmer days. The city begins to thaw as snowfall events become sparse. Weather in March »Weather in April
In April, Mertert casts off the last vestiges of winter. Outdoor enthusiasts will enjoy the mild temperatures without the worry of a sudden snowfall with just 2mm (0.08") of snowfall recorded for this month. As days become longer and more pleasant, the city takes on a fresher look. Weather in April »Weather in May
By May, Mertert welcomes the warm embrace of spring. The city’s weather is comfortably mild and perfect for exploring natural surroundings. There's no snowfall during this time, and temperatures continue to climb. Many sunny days are to be enjoyed during this month, with an average daylight exposure of around 15.4 hours. Weather in May »Weather in June
June marks the onset of summer in Mertert, resulting in notably warmer weather. Daylight peaks at an average of 16.2 hours, allowing residents to revel in the longest days of the year. There's no snowfall, and the cloud percentage decreases. Weather in June »Weather in July
As summer well and truly settles in Mertert in July, temperatures can reach up to 22.7°C (72.9°F), presenting the city in a revitalizing light. Despite humidity levels dropping slightly from June, the difference in weather is not drastic. Weather in July »Weather in August
August maintains the warm, summer rhythm in Mertert, though slightly reduced temperatures are observed from the preceding month. A rise in rainfall in the latter part of the month signals the eventual transition to fall. Although humidity decreases slightly relative to July, the changes in other weather parameters are hardly noticeable. Weather in August »Weather in September
September brings the first hints of fall to Mertert. The days grow shorter, and there is a visible drop in temperature. However, with an average high of 18.5°C (65.3°F), this month still offers pleasant weather. A decrease in rainfall makes this a relatively dry month, adding to the charm of early autumn. Weather in September »Weather in October
October in Mertert is a picture of true fall, with dropping temperatures and shorter days. Dense autumn foliage adds a vibrant hue to the cityscape, making outdoor walks particularly appealing. Significant changes in weather patterns are seen compared to September. Weather in October »Weather in November
November brings near-winter conditions to Mertert, characterized by a significant drop in temperatures. Precipitation trends lean towards an increase as the city transitions from fall. An increase in snowfall up to 12mm (0.47") occurs for the first time since April, providing occasional glimpses of winter landscapes. Weather in November »Weather in December
December in Mertert is the harbinger of the full brunt of winter. With the highest level of rainfall at 69mm (2.72"), and snowfall equating to that of January, the city is frequently shrouded in white. The decrease in daylight hours, coupled with the drop in temperatures, often results in foggy mornings and chilly evenings. Weather in December »Updated: Jul 4, 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
January is the coldest month, exhibiting average temperatures of 3.1°C (37.6°F) at the peak and -1.3°C (29.7°F) at the base.
In Mertert, during the entire year, the rain falls for 170 days and collects up to 516mm (20.31") of precipitation.
Months with snowfall in Mertert are January through April, October through December.
The months with the most snowfall are January and December, with an average 66mm (2.6") of accumulated snow.
Throughout the year, there are 28.8 snowfall days, and 214mm (8.43") of snow is accumulated.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The months with the lowest humidity are April and August, with an average relative humidity of 76%.
In Mertert, snow does not fall in May through September.
With an average of 16h and 12min of daylight, June has the longest days of the year.
The months with the highest UV index are June and July, with an average maximum UV index of 5.
July is Mertert's warmest month, registering average high temperatures of 22.7°C (72.9°F) and lows of 12°C (53.6°F).
July is the month with the least rainfall. Rain falls for 11.4 days and accumulates 25mm (0.98") of precipitation.
The month with the most sunshine is July, with an average of 9.8h of sunshine.
On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.
December is the most humid month, with an average relative humidity of 91%.
The month with the most rainfall is December, when the rain falls for 17.1 days and typically aggregates up to 69mm (2.72") of precipitation.
December has the shortest days of the year, with an average of 8h and 12min of daylight.
December has the least sunshine of the year, with an average of 3.1h of sunshine.
Average temperature
Mertert, Luxembourg
The warmest month (with the highest average high temperature) is July (22.7°C).
The month with the lowest average high temperature is January (3.1°C).
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is January (-1.3°C).
Average pressure
Mertert, Luxembourg
- Average pressure in January:
1017.7mbar - Average pressure in February:
1016.4mbar - Average pressure in March:
1016.5mbar - Average pressure in April:
1015.6mbar - Average pressure in May:
1016.1mbar - Average pressure in June:
1016mbar
- Average pressure in July:
1015.7mbar - Average pressure in August:
1016.1mbar - Average pressure in September:
1017.9mbar - Average pressure in October:
1017.5mbar - Average pressure in November:
1014.2mbar - Average pressure in December:
1018.3mbar
The month with the highest atmospheric pressure is December (1018.3mbar).
The month with the lowest atmospheric pressure is November (1014.2mbar).
Average wind speed
Mertert, Luxembourg
- Average wind speed in January:
13.8km/h - Average wind speed in February:
14.7km/h - Average wind speed in March:
14.1km/h - Average wind speed in April:
11.2km/h - Average wind speed in May:
10.7km/h - Average wind speed in June:
10.3km/h
- Average wind speed in July:
10km/h - Average wind speed in August:
9.4km/h - Average wind speed in September:
9.8km/h - Average wind speed in October:
11.1km/h - Average wind speed in November:
12.4km/h - Average wind speed in December:
14.2km/h
The windiest month (with the highest average wind speed) is February (14.7km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).
Average humidity
Mertert, Luxembourg
The month with the highest relative humidity is December (91%).
The months with the lowest relative humidity are April and August (76%).
Average rainfall
Mertert, Luxembourg
The wettest month (with the highest rainfall) is December (69mm).
The driest month (with the least rainfall) is July (25mm).
Average rainfall days
Mertert, Luxembourg
- Average rainfall days in January:
15.2 days - Average rainfall days in February:
12.8 days - Average rainfall days in March:
14 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
11.4 days - Average rainfall days in August:
11.7 days - Average rainfall days in September:
9.6 days - Average rainfall days in October:
14.2 days - Average rainfall days in November:
15.5 days - Average rainfall days in December:
17.1 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is September (9.6 days).
Average snowfall
Mertert, Luxembourg
The months with the highest snowfall are January and December (66mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days
Mertert, Luxembourg
- Average snowfall days in January:
7.9 days - Average snowfall days in February:
7.8 days - Average snowfall days in March:
3 days - Average snowfall days in April:
0.5 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:
0.2 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
6.9 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Mertert, Luxembourg
- Average daylight in January:
8h and 42min - Average daylight in February:
10h and 6min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 48min - Average daylight in May:
15h and 24min - Average daylight in June:
16h and 12min
- Average daylight in July:
15h and 48min - Average daylight in August:
14h and 24min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 6min - Average daylight in December:
8h and 12min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in January:
3h and 30min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 0min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 6min
- Average sunshine in July:
9h and 48min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 12min - Average sunshine in October:
5h and 18min - Average sunshine in November:
3h and 48min - Average sunshine in December:
3h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days
Mertert, Luxembourg
- Average sunshine days in January:
9.5 days - Average sunshine days in February:
9.3 days - Average sunshine days in March:
12.8 days - Average sunshine days in April:
13 days - Average sunshine days in May:
9.5 days - Average sunshine days in June:
11 days
- Average sunshine days in July:
17.5 days - Average sunshine days in August:
17.6 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
13.9 days - Average sunshine days in November:
9.5 days - Average sunshine days in December:
7.6 days
The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is December (7.6 days).
Average UV index
Mertert, Luxembourg
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Mertert, Luxembourg
The month with the most cloud cover is December (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility
Mertert, Luxembourg
The months with the highest visibility are March, April, July and August (9km).
The months with the lowest visibility are November and December (7km).
