Heilbronn in Fall
In fall (September, October and November), Heilbronn sees average daytime highs around 14°C and overnight lows near 7°C, with 207 mm of precipitation over about 34 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 21°C in early September to 5°C by late November. The sky is clear or mostly clear about 18% of the time across fall, and the air most often feels dry.
Fall is Heilbronn's 3rd-best season to visit on our travel score. For the whole year in context, see Heilbronn's year-round climate.
- Avg daytime high
- 14°C
- 3rd-warmest season
- Avg overnight low
- 7°C
- Precipitation
- 207 mm
- 34 wet days
- Avg wind
- 10 km/h
- Travel score
- 3.6
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Heilbronn in Fall
Over the season highs ease from about 21°C in early September to 5°C by late November.
A typical fall day in Heilbronn reaches about 14°C and drops to 7°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Heilbronn
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 16 that feel at or below 0°C.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Heilbronn 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 | 4° / -1° | 76 | 12.3 | 4.4 | 8.5 | 0.0 |
| Feb | 5° / -1° | 66 | 11.3 | 4.3 | 9.8 | 0.2 |
| Mar | 10° / 2° | 76 | 12.5 | 2 | 11.6 | 2.0 |
| Apr | 15° / 5° | 52 | 10.4 | 0.2 | 13.4 | 4.2 |
| May | 19° / 9° | 79 | 13.1 | 0 | 15 | 5.5 |
| Jun | 22° / 13° | 66 | 12.2 | 0 | 15.9 | 6.2 |
| Jul | 24° / 14° | 74 | 12.7 | 0 | 15.6 | 6.5 |
| Aug | 24° / 14° | 62 | 11.1 | 0 | 14.2 | 6.7 |
| Sep | 19° / 11° | 63 | 10.3 | 0 | 12.4 | 6.0 |
| Oct | 14° / 7° | 72 | 11.8 | 0.1 | 10.5 | 3.7 |
| Nov | 8° / 3° | 72 | 11.6 | 1.4 | 8.9 | 1.1 |
| Dec | 4° / 0° | 90 | 14.6 | 4.7 | 8.1 | 0.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 18% of the time across fall.
Chance of precipitation in Fall
Heilbronn gets around 207 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 10 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 18 min in early September to 8 h 18 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 2.2 kWh/m².
Is fall a good time to visit Heilbronn?
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 Heilbronn.
What to pack for Heilbronn in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Heilbronn sees daytime highs around 14°C and nights near 7°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 34 days see rain.
UV index in Heilbronn 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 Heilbronn peaks around July 15 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 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 | 2 | 4 | 4 | 6 | 7 | 8 | 6 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 4 | Moderate |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Heilbronn 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 Heilbronn is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (November, 8 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Heilbronn's WHO annual average of 11.6 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 10 | 13 | 15 | 14 | 15 | 12 | 13 | 12 | 10 | 8 | 8 |
| Level | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 10 | Good |
| Mar | 13 | Moderate |
| Apr | 15 | Moderate |
| May | 14 | Moderate |
| Jun | 15 | Moderate |
| Jul | 12 | Moderate |
| Aug | 13 | Moderate |
| Sep | 12 | Good |
| Oct | 10 | Good |
| Nov | 8 | Good |
| Dec | 8 | Good |
Where is Heilbronn?
Heilbronn sits at 49.1°N, 9.2°E, 173 m above sea level, in Germany. The nearest listed city is Neckarsulm, 5.0 km away.
Topography around Heilbronn
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Heilbronn.
Within 3 km, the terrain around Heilbronn has only modest variations in elevation — a maximum elevation change of 181 m around an average of 196 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 416 m; within 80 km, large variations in elevation — a maximum elevation change of 910 m.
The land around Heilbronn is covered by artificial surfaces (43%) and trees (34%) within 3 km, cropland (37%) and trees (31%) within 16 km, and trees (47%) and cropland (28%) within 80 km.
Germany travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 80% of US
- price level, 2025
- GDP per capita
- $60,496
- 2025
- Happiness
- 6.9 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 0.9
- per 100k, 2023
- Road deaths
- 3.8
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 615
- 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 Heilbronn (49.1399°, 9.2205°, elevation 173 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.