Luxembourg climate
Luxembourg (Luxembourg) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 10 °C49 °F, and about 770 mm30 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Luxembourg climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 338 | −228 | 133 | 672.6 | 20 |
| Feb | 540 | −229 | 135 | 572.2 | 19 |
| Mar | 948 | 033 | 541 | 572.2 | 14 |
| Apr | 1458 | 439 | 948 | 461.8 | 5 |
| May | 1865 | 846 | 1356 | 702.8 | 0 |
| Jun | 2373 | 1253 | 1763 | 682.7 | 0 |
| Jul | 2577 | 1457 | 1967 | 652.6 | 0 |
| Aug | 2576 | 1356 | 1966 | 722.8 | 0 |
| Sep | 2069 | 948 | 1559 | 552.2 | 0 |
| Oct | 1458 | 642 | 1050 | 652.5 | 2 |
| Nov | 847 | 236 | 541 | 682.7 | 8 |
| Dec | 439 | −131 | 235 | 793.1 | 18 |
| Year | 2577 | −228 | 1049 | 77030 | 85 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 94% | 79% | 0.9 | 8:35 |
| Feb | 91% | 76% | 1.6 | 10:02 |
| Mar | 86% | 68% | 2.8 | 11:44 |
| Apr | 80% | 64% | 4.4 | 13:41 |
| May | 78% | 70% | 5.1 | 15:20 |
| Jun | 74% | 68% | 5.7 | 16:16 |
| Jul | 68% | 66% | 5.5 | 15:53 |
| Aug | 69% | 66% | 4.6 | 14:25 |
| Sep | 74% | 61% | 3.5 | 12:31 |
| Oct | 85% | 71% | 2.0 | 10:39 |
| Nov | 93% | 80% | 1.0 | 8:59 |
| Dec | 95% | 81% | 0.7 | 8:09 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Luxembourg is like
The warmest month is July, with an average high of 25 °C77 °F and a low of 14 °C57 °F. The coldest is January, when highs average 3 °C38 °F and lows −2 °C28 °F. Seasons are strongly marked: the warmest month is on average 18.8 °C33.9 °F warmer than the coldest.
Annual precipitation is moderate at about 770 mm30 in. Rain is spread fairly evenly through the year. The wettest month is December (79 mm3.1 in), the driest is April (46 mm1.8 in).
Relative humidity ranges from 68% in July to 95% in December. The clearest skies (lowest average cloud amount, 61%) are typical of September. Average wind speed near the ground ranges from 8 km/h (5 mph) in August to 12 km/h (7 mph) in January. Daylight lasts from about 8.2 hours in December to 16.3 hours in June.
A lasting snow cover is typical in December–February. In those months the average snow depth in the reanalysis exceeds 10 cm. It is deepest in January, at about 13 cm.
Best time to visit Luxembourg
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September. Average highs then reach 20 °C69 °F to 25 °C77 °F. Precipitation is 55 mm2.2 in to 72 mm2.8 in per month.
The most challenging month is January, which is cold, with average highs of 3 °C38 °F.
Comfort score: months are ranked by how close they come to an ideal. That means an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Luxembourg
- Winter (December–February) — highs 338 to 5 °C40 °F, lows −228 to −1 °C31 °F, about 68 mm2.7 in of precipitation a month. Pack a winter coat, hat, gloves and warm, non-slip boots and shoes with good grip, as frost is common.
- Spring (March–May) — highs 948 to 18 °C65 °F, lows 033 to 8 °C46 °F, about 58 mm2.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Summer (June–August) — highs 2373 to 25 °C77 °F, lows 1253 to 14 °C57 °F, about 69 mm2.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 847 to 20 °C69 °F, lows 236 to 9 °C48 °F, about 63 mm2.5 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Luxembourg compares
The nearest larger place is Trier, about 40 km to the northeast. Compared with it, Luxembourg is on average 0.7 °C1.3 °F cooler. It receives a similar amount of precipitation. The difference is largest in December (0.9 °C1.7 °F cooler).
Some places in other countries have a very similar pattern of temperature and rainfall. The closest matches are Kassel (Germany, Cfb), Paderborn (Germany, Cfb) and Hildesheim (Germany, Cfb).
Nearby places
- Climate in Trier 40 km · 10 °C51 °F · 762 mm30 in
- Climate in Metz 55 km · 10 °C51 °F · 752 mm30 in
- Climate in Saarbrücken 76 km · 10 °C51 °F · 762 mm30 in
- Climate in Nancy 103 km · 11 °C51 °F · 758 mm30 in
- Climate in Liège 121 km · 11 °C51 °F · 862 mm34 in
- Climate in Aachen 130 km · 9 °C49 °F · 747 mm29 in
- Climate in Namur 131 km · 10 °C50 °F · 808 mm32 in
- Climate in Koblenz 132 km · 11 °C51 °F · 785 mm31 in
Frequently asked questions
What is the warmest month in Luxembourg?
July is the warmest month in Luxembourg. Its average high is 25 °C (77 °F) and its average low is 14 °C (57 °F).
What is the coldest month in Luxembourg?
January is the coldest month. Its average high is 3 °C (38 °F) and its average low is -2 °C (28 °F).
When does it rain the most in Luxembourg?
December is the wettest month with about 79 mm (3.1 in) of precipitation. April is the driest with about 46 mm (1.8 in).
What is the best time to visit Luxembourg?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station. So they can differ from airport records. The gaps are largest on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.