Heverlee in Fall
In fall (September, October and November), Heverlee sees average daytime highs around 14°C and overnight lows near 8°C, with 180 mm of precipitation over about 34 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 20°C in early September to 7°C by late November. The sky is clear or mostly clear about 15% of the time across fall, and the air most often feels dry.
Fall is Heverlee's 2nd-best season to visit on our travel score. For the whole year in context, see Heverlee's year-round climate.
- Avg daytime high
- 14°C
- 2nd-warmest season
- Avg overnight low
- 8°C
- Precipitation
- 180 mm
- 34 wet days
- Avg wind
- 15 km/h
- Travel score
- 3.9
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Heverlee in Fall
Over the season highs ease from about 20°C in early September to 7°C by late November.
A typical fall day in Heverlee reaches about 14°C and drops to 8°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Heverlee
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 8 that feel at or below 0°C.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Heverlee weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 6° / 1° | 62 | 12.3 | 1.3 | 8.2 | 0.3 |
| Feb | 7° / 1° | 58 | 11.2 | 2.1 | 9.7 | 0.6 |
| Mar | 10° / 3° | 57 | 12.1 | 0.9 | 11.5 | 2.3 |
| Apr | 14° / 6° | 50 | 11.4 | 0 | 13.5 | 3.9 |
| May | 18° / 9° | 65 | 12.9 | 0 | 15.2 | 5.2 |
| Jun | 21° / 12° | 70 | 12.1 | 0 | 16.2 | 5.9 |
| Jul | 23° / 14° | 75 | 12.7 | 0 | 15.8 | 6.3 |
| Aug | 22° / 14° | 78 | 12.2 | 0 | 14.3 | 6.3 |
| Sep | 19° / 11° | 57 | 10.5 | 0 | 12.4 | 5.8 |
| Oct | 14° / 8° | 59 | 11.4 | 0 | 10.4 | 4.0 |
| Nov | 9° / 5° | 64 | 12.1 | 0.4 | 8.7 | 1.8 |
| Dec | 6° / 2° | 75 | 13.2 | 1.7 | 7.8 | 0.5 |
Cloud cover in Fall
The sky is clear or mostly clear about 15% of the time across fall.
Chance of precipitation in Fall
Heverlee gets around 180 mm of rain and snow over 34 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 15 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 24 min in early September to 8 h 06 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 2.0 kWh/m².
Is fall a good time to visit Heverlee?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a weaker month for outdoor sightseeing in Heverlee.
What to pack for Heverlee in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Heverlee sees daytime highs around 14°C and nights near 8°C. Pack a warm layer. Worth having: rain gear. About 34 days see rain.
UV index in Heverlee in Fall
Clear-sky midday UV across fall averages around 3. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Heverlee peaks around July 12 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 3 | 4 | 6 | 6 | 6 | 6 | 4 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 3 | Moderate |
| Apr | 4 | Moderate |
| May | 6 | High |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 2 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Heverlee in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Heverlee is worst in April — around 18 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 13 | 17 | 18 | 16 | 15 | 14 | 15 | 15 | 13 | 12 | 11 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 13 | Moderate |
| Mar | 17 | Moderate |
| Apr | 18 | Moderate |
| May | 16 | Moderate |
| Jun | 15 | Moderate |
| Jul | 14 | Moderate |
| Aug | 15 | Moderate |
| Sep | 15 | Moderate |
| Oct | 13 | Moderate |
| Nov | 12 | Moderate |
| Dec | 11 | Good |
Where is Heverlee?
Heverlee sits at 50.9°N, 4.7°E, 31 m above sea level, in Belgium. The nearest listed city is Leuven, 2.0 km away.
Topography around Heverlee
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Heverlee.
Within 3 km, the terrain around Heverlee has only modest variations in elevation — a maximum elevation change of 82 m around an average of 46 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 151 m; within 80 km, significant variations in elevation — a maximum elevation change of 463 m.
The land around Heverlee is covered by trees (42%) and artificial surfaces (37%) within 3 km, trees (37%), cropland (31%) and grassland (20%) within 16 km, and trees (32%), cropland (32%) and grassland (24%) within 80 km.
Belgium travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 230 V · 50 Hz
- Prices
- ≈ 81% of US
- price level, 2025
- GDP per capita
- $60,750
- 2025
- Happiness
- 6.9 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.1
- per 100k, 2021
- Road deaths
- 5.8
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 608
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Heverlee (50.8643°, 4.696°, elevation 31 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.