Grand Ducal Palace in Luxembourg city. At the right: part of the Parliament building (Chambre des députés)

Luxembourg · 10 kWp reference system

Luxembourg City solar forecast

Photo: Cayambe, CC BY-SA 3.0. Cropped, resized and converted to WebP by GridPassport.

Wednesday, August 5, 2026

About 49.0 kWh tomorrow

For a standard 10 kWp south-facing system in Luxembourg City, GridPassport estimates 49.0 kWh on Wednesday, August 5, 2026, with a likely range of 38.9-55.7 kWh. The strongest production window is expected at 12:00-16:00 local time.

Updated Aug 4, 2026, 08:53 PM GMT+2 · fresh snapshot
Likely range
38.9-55.7 kWh
Strongest window
12:00-16:00
Confidence
medium
Forecast my solar output

Typical year

Solar production month by month in Luxembourg City

A standard 10 kWp system produces about 10,660 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.

Values are kWh per month. Source: European Commission JRC PVGIS.

What makes Luxembourg City's solar profile different? The typical annual yield is about 1,066 kWh per installed kWp, ranking Luxembourg City #3 of 3 modelled locations in Luxembourg. That is 2% below the median of the 3 Luxembourg locations in this dataset. July is typically the strongest month and December the weakest; the stronger month produces about 4.3 times as much.

See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuary Monthly output352 kWh Daily average11.4 kWh/day Year-to-year variation±75 kWh
MonthFebruary Monthly output551 kWh Daily average19.7 kWh/day Year-to-year variation±155 kWh
MonthMarch Monthly output958 kWh Daily average30.9 kWh/day Year-to-year variation±183 kWh
MonthApril Monthly output1,224 kWh Daily average40.8 kWh/day Year-to-year variation±194 kWh
MonthMay Monthly output1,289 kWh Daily average41.6 kWh/day Year-to-year variation±201 kWh
MonthJune Monthly output1,304 kWh Daily average43.5 kWh/day Year-to-year variation±161 kWh
MonthJuly Monthly output1,325 kWh Daily average42.7 kWh/day Year-to-year variation±151 kWh
MonthAugust Monthly output1,196 kWh Daily average38.6 kWh/day Year-to-year variation±124 kWh
MonthSeptember Monthly output1,068 kWh Daily average35.6 kWh/day Year-to-year variation±90 kWh
MonthOctober Monthly output708 kWh Daily average22.9 kWh/day Year-to-year variation±127 kWh
MonthNovember Monthly output373 kWh Daily average12.4 kWh/day Year-to-year variation±89 kWh
MonthDecember Monthly output310 kWh Daily average10.0 kWh/day Year-to-year variation±83 kWh

Nearby solar forecasts

Compare Luxembourg City with nearby cities

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Method and data

Every city uses a 10 kWp system facing south at 35 degrees with 14% system losses. Tomorrow's figure combines hourly weather with GridPassport's PV production and uncertainty model. The monthly profile uses the European Commission JRC PVGIS multi-year climate series. Roof direction, shade, snow, dirt, inverter clipping and local weather can change real output.