Weather in Bonn on 20 August 2026
Preliminary outlook for 20 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +27°C and nighttime around +16°C, average precipitation 0.3 mm, wind around 2 m/s, humidity around 65%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+20°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +15°C
Precipitation: 0 mm
Wind: 2 — 4 m/s
Humidity: 55%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 9% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +21°C | Dew point (avg.) | +11°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 253° ↖ (NNW) |
Sunrise
06:27
Duration
14 h 15 min
Sunset
20:42
Moonrise
01:54
Moonset
19:40
Moon phase
Waning Crescent
Illumination
15%
+20°C
Weather archive — for 2024 year
Partly Cloudy
Weather archive — for 2024 year
Nighttime: +13°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 70%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 13 h |
| UV index | 6 | Cloud cover (avg.) | 16% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 168° ↓ (S) |
Sunrise
06:28
Duration
14 h 13 min
Sunset
20:41
Moonrise
21:12
Moonset
06:41
Moon phase
Full Moon
Illumination
100%
+24°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 0 — 1 m/s
Humidity: 71%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 47% |
| Pressure (avg.) | 766 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +24°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +24°C | Wind chill (avg.) | +23°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 129° ↓ (SSW) |
Sunrise
06:26
Duration
14 h 17 min
Sunset
20:43
Moonrise
10:53
Moonset
22:13
Moon phase
Waxing Crescent
Illumination
23%
+20°C
Weather archive — for 2022 year
Patchy rain nearby
Weather archive — for 2022 year
Nighttime: +16°C
Precipitation: 0.3 mm
Wind: 3 — 4 m/s
Humidity: 62%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 9 h |
| UV index | 5 | Cloud cover (avg.) | 69% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 279° ← (W) |
Sunrise
06:27
Duration
14 h 15 min
Sunset
20:42
Moonrise
Does not rise today
Moonset
16:54
Moon phase
Last Quarter
Illumination
39%
+19°C
Weather archive — for 2021 year
Patchy rain nearby
Weather archive — for 2021 year
Nighttime: +14°C
Precipitation: 0.2 mm
Wind: 1 — 1 m/s
Humidity: 70%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 10 h |
| UV index | 5 | Cloud cover (avg.) | 47% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +19°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 236° ← (WNW) |
Sunrise
06:27
Duration
14 h 15 min
Sunset
20:42
Moonrise
20:05
Moonset
02:48
Moon phase
Waxing Gibbous
Illumination
83%
+25°C
Weather archive — for 2020 year
Partly Cloudy
Weather archive — for 2020 year
Nighttime: +19°C
Precipitation: 1.1 mm
Wind: 3 — 3 m/s
Humidity: 64%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 10 h |
| UV index | 5 | Cloud cover (avg.) | 69% |
| Pressure (avg.) | 756 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 9 km | Sea temperature | — |
| Feels like (avg.) | +25°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +25°C | Wind chill (avg.) | +24°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 154° ↘ (SSE) |
Sunrise
06:27
Duration
14 h 14 min
Sunset
20:41
Moonrise
07:31
Moonset
21:43
Moon phase
Waxing Crescent
Illumination
6%
Weather in Bonn on 20 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+26°C
|
+15°C
|
+20°C | 14 h | 6 | 55% | 2 — 4 m/s |
| 2024 |
+27°C
|
+13°C
|
+20°C | 13 h | 6 | 70% | 3 — 4 m/s |
| 2023 |
+29°C
|
+18°C
|
+24°C | 14 h | 6 | 71% | 0 — 1 m/s |
| 2022 |
+26°C
|
+16°C
|
+20°C | 9 h | 5 | 62% | 3 — 4 m/s |
| 2021 |
+23°C
|
+14°C
|
+19°C | 10 h | 5 | 70% | 1 — 1 m/s |
| 2020 |
+31°C
|
+19°C
|
+25°C | 10 h | 5 | 64% | 3 — 3 m/s |