General Weather Evolution for the Next 6 Days
Europe: Analysis & Forecast maps (6 days)
Update 2-9-25 at 12 AM – Evolution of the Weather Pattern
Atmospheric evolution
A pair of low-pressure systems (1002–999 hPa), currently located over the ocean and southwest of England, will merge within the next 24 hours into a deeper low (989 hPa). This system will move from northern England towards the Norwegian Sea on Wednesday.
The associated weather fronts, bringing rain and fairly active conditions, will reach our regions this evening and tonight, lingering over much of the country tomorrow.
On Thursday, relatively mild but unstable maritime air will follow, bringing scattered showers.
Towards the end of the week, a ridge of high pressure will extend over France and southern Germany, leading to the development of a high-pressure system (1023 hPa), centred Friday afternoon over the northern Alps and moving into central Europe (1022 hPa) on Saturday.
This evolution will bring marked atmospheric stabilisation and the advection of milder to warm air over the weekend. However, a cold front is expected Sunday evening, crossing the Benelux from west to east during the following night.
36-hour forecast (Chart)
(These forecasts are generally updated every days)
Update 2 September 2025 – 9am
Multimodel BMCB: ICOND2 – AROMEHD – ALADIN
🌧 Rainfall forecast (next 36 hours)
- North of the Scheldt: 6–23 L/m²
- Between Scheldt and Sambre-Meuse: 2–11 L/m²
- South of Sambre-Meuse: 1–12 L/m²
📅 Today – Tuesday, 2 September
🔹 Morning
Wide clear spells at first, but cloudier over Belgian Luxembourg, southern Namur and the Hainaut boot.
Later, variable skies with 50–90% cumulus and some cirrus near the French border.
🌬 Wind: south to southwest, gusts 25–45 km/h.
🔹 Afternoon
Often very cloudy: 60–90% cumulus/altostratus/cirrus, but 90–100% nimbostratus over Flanders, Hainaut and southern Belgian Luxembourg, with some rain.
🌬 Wind: south to southwest, gusts 30–50 km/h.
🌡 Highs: 20–22°C on the coast, 20–23°C inland, 18–19°C in the High Ardennes.
🔹 Evening
Overcast with 90–100% nimbostratus and rain.
🌬 Wind: south, gusts 25–45 km/h.
🔹 Night
Cloudy with 70–100% cloud cover at all levels.
🌬 Wind: south to southwest, gusts 30–40 km/h.
🌡 Lows: 15–16°C on the coast, 16–17°C inland, 11–15°C south of the Sambre-Meuse valley.
📅 Tomorrow – Wednesday, 3 September
🔹 Morning
Variable cloud (50–100% cumulus/altocumulus) with showers, especially in Campine, Antwerp, Brabant, western Hainaut and Flanders.
🌬 Wind: southwest to south, gusts 55-75 km/h, but 45-55 km/h in the south of Luxembourg province.
🔹 Afternoon
Changeable skies (70–100% cumulus/cumulonimbus) with showers, locally thundery, across most regions.
🌬 Wind: southwest to south, gusts 45–65 km/h, locally 35–45 km/h in the south of Luxembourg province.
🌡 Highs: 22–23°C on the coast and inland, 18–19°C in the High Ardennes.
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Forecast for the coming days
Multimodel BMCB ( OPERATIONAL + ENSEMBLES ICON-GFS-ECMWF-AIFS-GCGFS ) (Chart)
Forecast of the range of temperatures, precipitations + general type of weather in Belgium
(These forecasts are generally updated every 2-4 days)
Update: 2-9-2025 at 15:00
🌍 Forecast for the coming days
(according to the BMCB Multimodel: operational models ICON-AIFS-ECMWF)
📅 Thursday 4 September
🌡 Highs: 17/24°C
🌧 Precipitation (00-00h):
• North of the Scheldt: 3-10 mm
• Between Scheldt and Sambre-Meuse: 2-10 mm
• South of Sambre-Meuse: 2-11 mm
Fairly windy from S-SW, gusts 40-60 km/h
🔹 Morning: dry with sunny spells, 30-90% cloud cover at all levels
🔹 Afternoon: 90-100% nimbostratus, locally cumulonimbus with showers or thunderstorms, mainly in the south
🔹 Night: variable cloud, showers possible near the coast
📅 Friday 5 September
🌡 Highs: 16/23°C
🌧 Precipitation: mostly dry, 0-5 mm at most
🔹 Morning: variable cloud, 40-90% cumulus
🔹 Afternoon: widespread sunny spells, still 20-70% cumulus inland
🔹 Night: clear spells, 60-90% stratocumulus in the west, risk of low stratus + fog in valleys south of Sambre-Meuse
📅 Saturday 6 September
🌡 Highs: 19/26°C
🌧 Precipitation: none
🔹 Morning: fairly sunny with 30-60% altocumulus + cirrus
🔹 Afternoon: mostly sunny with 30-70% cumulus and altocumulus
🔹 Night: clearing skies, only 0-20% cirrus
📅 Sunday 7 September
🌡 Highs: 22/30°C
🌧 Precipitation: 0-6 mm
🔹 Morning: temporarily high cloud (40-60% altocumulus + cirrus)
🔹 Afternoon: partly veiled skies with 30-60% altocumulus + cirrus; in the evening 80-100% cumulonimbus over Flanders with showers or thunderstorms
🔹 Night: cloudy to overcast with local showers, small thunderstorm risk
📅 Monday 8 September
🌡 Highs: 17/23°C
🌧 Precipitation: 0-3 mm
Moderately windy from SW, gusts 30-50 km/h
🔹 Morning: variable cloud with 30-70% cumulus, isolated coastal shower
🔹 Afternoon: bright with sunny spells, 30-70% cumulus
🔹 Night: variable cloud with clear intervals
🔮 Outlook (9 → 16 September)
Temperatures 13-22°C, unsettled with frequent showers but also drier spells.
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METEOCONSULT
BENELUX:
🔎 3–4 week outlook
Medium-term: 13 – 28 September
13 to 21 September: Return of the high-pressure system and calm weather
The prevailing scenario indicates the stable establishment of a high-pressure system, bringing generally calm weather with light winds and limited precipitation. With shortening daylight, morning fogs may increase in plains and valleys. Temperatures are expected to rise again, particularly in the afternoons, offering pleasant sunny periods.
22 to 28 September: Toward more summery conditions
Longer-term trends suggest a possible return of summer-like conditions by the end of the month. Under the influence of a very mild south-southwest flow, temperatures could remain pleasant, providing clear and mild days. While this scenario is not yet certain, it hints at a milder and intermittently summery autumn.
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Update 25-8-25
Weather Outlook for 3 months
- September: marked variability at the start of the meteorological autumn
Temperature (anomaly): slightly above average (≈ +0.5 to +1.0 °C), consistent with the European seasonal model trend (ECMWF/C3S).
Precipitation (anomaly): rather dry. September is likely to be very contrasting, with a disturbed start followed by a more anticyclonic regime. - October: near-average temperatures and little rainfall
Temperature (anomaly): close to seasonal norms, under more frequent anticyclonic influence. This could see the first autumn frosts appearing.
Precipitation (anomaly): trend close to normal. - November: a very mild month
Temperature (anomaly): above seasonal averages (+0.5 to +1 °C on average).
Precipitation (anomaly): uncertainty remains over the possible return of a more disturbed oceanic flow, which would bring beneficial rainfall.
from ICON (replace location left above )
from ECMWF (replace location left above)