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Weather in Hoeilaart
Flemish Brabant, 101 m · continuously updated
Uccle (8 km) · 9 °C · KMI/IRM 14:00
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Temperature · last 4 and next 28 hours
Hoeilaart weather: the next 24 hours
Updated hourly.
Hoeilaart 15-day forecast
Two-week trend.
Sun and golden hours
Sunrise –, golden light until –
Sunset –, golden light from –
–
Air quality
European index, modelled by Copernicus (CAMS).
UV index
Daily maximum — protection advised from 3.
Freezing level
Snow settles about 300 m below it.
Around Hoeilaart
Neighbouring towns, as the crow flies.
Official weather warnings
No active warning for Flemish Brabant.
Updated 15 Nov 13:48.
Is there an active weather warning for Hoeilaart?
No active warning for Flemish Brabant.
Latest RMI observation near Hoeilaart
Measured at Uccle, 8 km from Hoeilaart: situation as of 15 November 2026, 14:00. Uccle is the nearest weather station of the RMI/KMI (Royal Meteorological Institute of Belgium), one of the country's 28 synoptic stations. These are measured values, not a forecast; this page is refreshed three times a day, hence the time shown.
| Situation as of | 15 November 2026, 14:00 |
|---|---|
| Temperature | 9.3 °C |
| Wind | 18 km/h S |
| Gusts | 36 km/h |
| Rain, last hour | 0.0 mm |
| Humidity | 86 % |
| Pressure | 1003 hPa |
Observations from the 28 RMI stations
Source: RMI/KMI (Royal Meteorological Institute of Belgium), open observation data, Creative Commons Attribution 4.0 (CC BY 4.0) licence. The RMI is not liable for any damage resulting from the use of these data. Raw, unvalidated data shown as published, with wind converted from m/s to km/h. Data: opendata.meteo.be · CC BY 4.0
The observed climate near Hoeilaart
The weather station nearest to Hoeilaart, Uccle located 104 m above sea level, is 9 km away; its records cover 1795–2025. In November, the mean temperature there is 7.3 °C over 1991–2020, 1.0 °C more than over 1961–1990 (6.3 °C), with about – mm of rain. The warmest month ever measured is July 2006 (23.5 °C), the coldest February 1956 (−6.2 °C). See the full series of Uccle
Today in Hoeilaart
- No washing outside today: rain, or a risk of rain, covers the hours when it could dry. How it is calculated
- Terrace and barbecue between 18:00 and 23:00: rain likely (1.7 mm, up to 92 % chance). Have some shelter or a plan B ready. How it is calculated
- Best time to air the house: tomorrow, between 12:00 and 14:00. The outdoor dew point drops to 3.7 °C; once warmed to 20 °C, that air holds only 34 % humidity, against 50 % in a typical home: opening the windows dries the house. How it is calculated
- Garden: 24.1 mm of rain expected within 48 h, against a need of 1 mm. No need to water, the rain will do it. How it is calculated
Calculated from Open-Meteo forecasts of 2026-11-15 14:48 (local time): model values, not measurements. All of today's advice
7-day forecast for Hoeilaart
Today (Sunday 15 Nov) in Hoeilaart: heavy drizzle, 0 to 10 °C, precipitation 3.5 mm (92 %), wind up to 19 km/h. Tomorrow: light rain, 3 to 10 °C.
| Day | Weather | Min | Max | Precip. | Wind |
|---|---|---|---|---|---|
| Today | heavy drizzle | 0 °C | 10 °C | 3.5 mm | 19 km/h |
| Tomorrow | light rain | 3 °C | 10 °C | 4.1 mm | 26 km/h |
| Tue 17 Nov | rain | 4 °C | 14 °C | 20.3 mm | 35 km/h |
| Wed 18 Nov | drizzle | 8 °C | 11 °C | 1.8 mm | 25 km/h |
| Thu 19 Nov | showers | 8 °C | 9 °C | 15.2 mm | 22 km/h |
| Fri 20 Nov | showers | 2 °C | 8 °C | 14.4 mm | 12 km/h |
| Sat 21 Nov | partly cloudy | 1 °C | 10 °C | 0.0 mm | 11 km/h |
Tomorrow's weather in Hoeilaart
Tomorrow, Monday 16 Nov, in Hoeilaart: light rain, from 3 to 10 °C, 4.1 mm of precipitation (probability 63 %), wind up to 26 km/h.
| Hour | Weather | Temp. | Precip. | Chance | Wind |
|---|---|---|---|---|---|
| 00:00 |  overcast | 9 °C | 0.0 mm | 63 % | 13 km/h |
| 03:00 |  light drizzle | 9 °C | 0.2 mm | 51 % | 16 km/h |
| 06:00 | light drizzle | 8 °C | 0.2 mm | 48 % | 21 km/h |
| 09:00 | overcast | 7 °C | 0.0 mm | 36 % | 19 km/h |
| 12:00 | overcast | 7 °C | 0.0 mm | 26 % | 19 km/h |
| 15:00 | overcast | 7 °C | 0.0 mm | 18 % | 15 km/h |
| 18:00 | overcast | 4 °C | 0.0 mm | 15 % | 12 km/h |
| 21:00 | overcast | 3 °C | 0.0 mm | 25 % | 4 km/h |
Frequently asked questions
Will it rain tomorrow in Hoeilaart?
Yes: 4.1 mm expected, probability 63 %.
How warm will it be tomorrow in Hoeilaart?
Between 3 and 10 °C.
The weekend
Today, Sunday, in Hoeilaart: heavy drizzle, 0 to 10 °C. Next weekend: Saturday partly cloudy, 1 to 10 °C, Sunday heavy drizzle, 4 to 9 °C.
| Day | Weather | Min | Max | Precip. | Wind |
|---|---|---|---|---|---|
| Today | heavy drizzle | 0 °C | 10 °C | 3.5 mm | 19 km/h |
| Sat 21 Nov |  partly cloudy | 1 °C | 10 °C | 0.0 mm | 11 km/h |
| Sun 22 Nov | heavy drizzle | 4 °C | 9 °C | 9.6 mm | 21 km/h |
Hour by hour
The next 48 hours in Hoeilaart, hour by hour: temperature from 3 to 14 °C, 24.1 mm of rain expected.
| Hour | Weather | Temp. | Precip. | Chance | Wind |
|---|---|---|---|---|---|
| 14:00 | overcast | 8 °C | 0.0 mm | 16 % | 18 km/h |
| 15:00 | overcast | 9 °C | 0.0 mm | 30 % | 19 km/h |
| 16:00 | drizzle | 9 °C | 0.7 mm | 45 % | 17 km/h |
| 17:00 | drizzle | 9 °C | 0.9 mm | 62 % | 16 km/h |
| 18:00 | heavy drizzle | 10 °C | 1.2 mm | 81 % | 18 km/h |
| 19:00 | drizzle | 10 °C | 0.5 mm | 92 % | 18 km/h |
| 20:00 | overcast | 10 °C | 0.0 mm | 91 % | 17 km/h |
| 21:00 | overcast | 10 °C | 0.0 mm | 84 % | 17 km/h |
| 22:00 | overcast | 10 °C | 0.0 mm | 76 % | 16 km/h |
| 23:00 | overcast | 10 °C | 0.0 mm | 69 % | 15 km/h |
| 00:00 | overcast | 9 °C | 0.0 mm | 63 % | 13 km/h |
| 01:00 | light drizzle | 10 °C | 0.1 mm | 57 % | 15 km/h |
| 02:00 | light drizzle | 9 °C | 0.2 mm | 53 % | 17 km/h |
| 03:00 | light drizzle | 9 °C | 0.2 mm | 51 % | 16 km/h |
| 04:00 |  light rain | 9 °C | 1.9 mm | 49 % | 23 km/h |
| 05:00 | drizzle | 9 °C | 0.5 mm | 48 % | 26 km/h |
| 06:00 | light drizzle | 8 °C | 0.2 mm | 48 % | 21 km/h |
| 07:00 | light drizzle | 8 °C | 0.3 mm | 47 % | 20 km/h |
| 08:00 | light drizzle | 7 °C | 0.3 mm | 42 % | 23 km/h |
| 09:00 | overcast | 7 °C | 0.0 mm | 36 % | 19 km/h |
| 10:00 | overcast | 7 °C | 0.0 mm | 31 % | 18 km/h |
| 11:00 | light drizzle | 7 °C | 0.1 mm | 28 % | 17 km/h |
| 12:00 | overcast | 7 °C | 0.0 mm | 26 % | 19 km/h |
| 13:00 |  mostly sunny | 7 °C | 0.0 mm | 24 % | 19 km/h |
| 14:00 | overcast | 7 °C | 0.0 mm | 21 % | 18 km/h |
| 15:00 | overcast | 7 °C | 0.0 mm | 18 % | 15 km/h |
| 16:00 | overcast | 6 °C | 0.0 mm | 16 % | 14 km/h |
| 17:00 | overcast | 5 °C | 0.0 mm | 15 % | 14 km/h |
| 18:00 | overcast | 4 °C | 0.0 mm | 15 % | 12 km/h |
| 19:00 | partly cloudy | 3 °C | 0.0 mm | 16 % | 8 km/h |
| 20:00 | overcast | 3 °C | 0.0 mm | 20 % | 6 km/h |
| 21:00 | overcast | 3 °C | 0.0 mm | 25 % | 4 km/h |
| 22:00 | overcast | 3 °C | 0.0 mm | 31 % | 3 km/h |
| 23:00 | light drizzle | 3 °C | 0.3 mm | 37 % | 5 km/h |
| 00:00 | heavy drizzle | 4 °C | 1.0 mm | 43 % | 5 km/h |
| 01:00 | light rain | 4 °C | 1.9 mm | 49 % | 8 km/h |
| 02:00 | rain | 4 °C | 2.8 mm | 53 % | 11 km/h |
| 03:00 | light rain | 4 °C | 1.6 mm | 57 % | 17 km/h |
| 04:00 | light drizzle | 4 °C | 0.3 mm | 61 % | 18 km/h |
| 05:00 | drizzle | 5 °C | 0.5 mm | 66 % | 17 km/h |
| 06:00 | light rain | 5 °C | 2.2 mm | 72 % | 16 km/h |
| 07:00 | rain | 5 °C | 3.0 mm | 78 % | 13 km/h |
| 08:00 | light rain | 5 °C | 2.2 mm | 84 % | 9 km/h |
| 09:00 | drizzle | 6 °C | 0.6 mm | 89 % | 4 km/h |
| 10:00 | light drizzle | 11 °C | 0.1 mm | 92 % | 18 km/h |
| 11:00 | light drizzle | 13 °C | 0.4 mm | 92 % | 20 km/h |
| 12:00 | overcast | 14 °C | 0.0 mm | 90 % | 21 km/h |
| 13:00 | light drizzle | 13 °C | 0.1 mm | 88 % | 25 km/h |
Location of Hoeilaart
Hoeilaart lies at 101 m, 60 m above the average of the 63 places we cover in the province of Flemish Brabant (41 m). That makes it the 2nd highest of the 63. The main town, Leuven, lies 22 km to the north-east. The nearest places we cover are La Hulpe (4 km to the south-east), Watermael-Boitsfort (5 km to the north-west), Sint-Genesius-Rode (6 km to the west) and Oudergem (6 km to the north). With about 11,321 inhabitants according to GeoNames, Hoeilaart is the 41st largest of the 62 places we cover in the province of Flemish Brabant. Of the places of interest on this site, the nearest are Sonian Forest (natural site, 4 km to the north-west) and Waterloo, Lion’s Mound (sight, 6 km to the south-west).
Today is close to the November normal (9.9 °C).
Climate of Hoeilaart: 1991–2020 normals
In Hoeilaart, July is typically the warmest month (up to 23.5 °C on average), while January is the coldest at 1.3 °C. August sees the most rain, with around 92 mm.
By season (average highs, 1991–2020 normals): winter 6.6 °C and 230 mm of rain, spring 14.9 °C and 170 mm, summer 22.6 °C and 248 mm, autumn 14.8 °C and 213 mm. The wettest season is summer (29 % of the annual total), the driest spring (20 %).
| Max T (°C) | Min T (°C) | Rainfall (mm) | Rainy days | |
|---|---|---|---|---|
| January | 6.1 | 1.3 | 75 | 14 |
| February | 7.2 | 1.3 | 66 | 12 |
| March | 11.1 | 3.4 | 58 | 12 |
| April | 15.1 | 5.9 | 49 | 12 |
| May | 18.6 | 9.4 | 63 | 12 |
| June | 21.3 | 12.4 | 73 | 12 |
| July | 23.5 | 14.5 | 83 | 13 |
| August | 23.1 | 14.0 | 92 | 14 |
| September | 19.7 | 11.1 | 69 | 12 |
| October | 14.9 | 8.0 | 71 | 13 |
| November | 9.9 | 4.4 | 74 | 13 |
| December | 6.5 | 1.9 | 89 | 14 |
Compared with Leuven, the main town 22 km to the north-east, highs in the warmest month are 0.4 °C lower here, and the year brings 20 mm more precipitation. In no month does the average low fall below 0 °C; in 3 months the average high exceeds 20 °C (June, July and August).
The nearest neighbouring places, La Hulpe, Watermael-Boitsfort and Sint-Genesius-Rode, have almost identical normals. Among the 63 places we cover in the province of Flemish Brabant whose normals come from the ERA5 reanalysis, Hoeilaart ranks 54th for summer warmth and 6th for annual precipitation. The warmest summers are in Rotselaar, Haacht and Boortmeerbeek and the coolest in Landen; the wettest year is in Hoegaarden and the driest in Geetbets.
What is the warmest month in Hoeilaart?
The warmest month in Hoeilaart is typically July, averaging 23.5 °C (1991–2020 normal). The coldest is January, at 1.3 °C.
How many rainy days does Hoeilaart get per year?
Hoeilaart sees about 153 rainy days a year, adding up to roughly 861 mm of rainfall (1991–2020 normals).
How big is the gap between summer and winter in Hoeilaart?
Between July and January, the temperature gap in Hoeilaart runs to about 22.2 °C, based on the 1991–2020 normals.