Bonn Weather in May
May in Bonn brings pleasant temperatures, with daytime highs of 19°C (66°F) and nights around 9°C (48°F). Quite a bit of rainfall is expected, around 69 mm (2.7 in), so pack an umbrella.
Rainfall in Bonn in May
Typically around 16 days of rainfall are expected, averaging 69 mm (2.7 in) for the month. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.
Temperature in Bonn in May
May in Bonn sees highs of 19°C (66°F) and lows of 9°C (48°F) overnight. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Bonn in May
The days are predominantly sunny, with an estimated total of around 191 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.Should you favor a climate that's both dry and comfortably warm, June, July, August and September typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Germany, check out our Bonn's climate page.
Bonn Temperature in May
Min Temperature
9°C (48°F)
Max Temperature
19°C (66°F)
Chance of Rain
53%
Precipitation
69 mm (2.7 in)
Rainy days
16 days
Sunshine
191 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Bonn typically rise from around 17°C (63°F) at the start of May to approximately 20°C (68°F) by the end. Nights are cool, with lows typically ranging from 6°C (43°F) to 10°C (50°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Bonn in May
Browse day-by-day weather records for Bonn spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Bonn historical weather extremes in May
Based on weather observations in Bonn between 1976 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 29, 2017, with a maximum of 33°C (91°F).
- Bonn experienced its chilliest May day on May 4, 1979, reaching only 6°C (43°F).
- The lowest overnight temperature recorded in May was -2°C (28°F) (May 3, 1981).
Best Places in Germany in May
Find out more about the weather in Germany and which places have the best travel conditions in this month. See all of Germany in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Bonn in May
For Bonn in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Bonn in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Germany, check out our Bonn's climate page.
See the full Bonn climate overview or explore weather in Germany.
