, with cold (but not freezing) winters and very mild to pleasantly warm summers.
Bonn is a city of 335,000 inhabitants, located in the northwest of Germany, along the Rhine River, in the southern part of the Rhine-Ruhr metropolitan region, in the state of
, the area of the country relatively mild in winter, but also cool, wet and windy as it is more influenced by the ocean.
From 1949 to 1990, Bonn was the capital of the Federal Republic of Germany. On the other side of the river and south of the city respectively are
. The temperature rarely drops below -10 °C (14 °F), although in the past it has also dropped below -20 °C (-4 °F). The coldest record is -23 °C (-9.5 °F), set in January 1942.
, usually of short duration, during which the temperature can reach or exceed 35 °C (95 °F). Due to the location in the Rhine Valley, you can feel the muggy heat on hot days.
to visit Bonn is from mid-May to mid-September, as it is the mildest of year. July and August are the warmest months; however, it is a good idea to bring a sweatshirt or sweater, a light jacket and an umbrella, for rainy days and cool evenings.
. Here are the average temperatures.
January, the coldest month of the year, is generally a cold month. The average temperature is of
2.8 °C, with a minimum of
0.2 °C and a maximum of
5.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-7.5 °C. However, it dropped to
-16.4 °C in January 2009.
On the warmest days of the month, the temperature usually reaches around
12.5 °C. However, it reached
15.3 °C in January 2020.
Precipitation amounts to
54.6 mm, distributed over 11 days.
The day lasts on average 8 hours and 35 minutes.
There are on average 2 hours of sunshine per day. So, the sun shines 21% of the time.
The average humidity is 84%. Hence, the air is normally humid.
February is generally a cold month. The average temperature is of
3.5 °C, with a minimum of
0.4 °C and a maximum of
6.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-6 °C. However, it dropped to
-15.4 °C in February 2012.
On the warmest days of the month, the temperature usually reaches around
13.5 °C. However, it reached
20.7 °C in February 2019.
Precipitation amounts to
47 mm, distributed over 11 days.
The day lasts on average 10 hours and 5 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 28% of the time.
The average humidity is 80%. Hence, the air is normally humid.
March is generally a quite cold month. The average temperature is of
6.5 °C, with a minimum of
2.3 °C and a maximum of
10.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-4 °C. However, it dropped to
-11.9 °C in March 2013.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
23 °C in March 2017.
Precipitation amounts to
51.6 mm, distributed over 10 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 74%. Hence, the air is normally humid.
April is generally a mild month. The average temperature is of
10.3 °C, with a minimum of
5.2 °C and a maximum of
15.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-1.5 °C. However, it dropped to
-5 °C in April 2003.
On the warmest days of the month, the temperature usually reaches around
24 °C. However, it reached
28.3 °C in April 2007.
Precipitation amounts to
46.6 mm, distributed over 9 days.
The day lasts on average 13 hours and 55 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 68%.
May is generally a mild month. The average temperature is of
14 °C, with a minimum of
8.8 °C and a maximum of
19.2 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-0.1 °C in May 2019.
On the warmest days of the month, the temperature usually reaches around
27.5 °C. However, it reached
32.9 °C in May 2017.
Precipitation amounts to
71.1 mm, distributed over 10 days.
The day lasts on average 15 hours and 35 minutes. So the days are long.
There are on average 6.5 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 71%. Hence, the air is normally humid.
June is generally a very mild month. The average temperature is of
17.1 °C, with a minimum of
11.8 °C and a maximum of
22.4 °C.
On the coldest nights of the month, the temperature usually drops to around
6.5 °C. However, it dropped to
4.2 °C in June 2005.
On the warmest days of the month, the temperature usually reaches around
31.5 °C. However, it reached
35.7 °C in June 2017.
Precipitation amounts to
85.3 mm, distributed over 11 days.
The day lasts on average 16 hours and 25 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 7 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 72%. Hence, the air is normally humid.
July, the warmest month of the year, is generally a warm month. The average temperature is of
19 °C, with a minimum of
13.8 °C and a maximum of
24.2 °C.
On the coldest nights of the month, the temperature usually drops to around
9 °C. However, it dropped to
6.6 °C in July 2015.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
40.9 °C in July 2019.
Precipitation amounts to
84.3 mm, distributed over 11 days.
The day lasts on average 15 hours and 55 minutes. So the days are long.
There are on average 7 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 72%. Hence, the air is normally humid.
August is generally a warm month. The average temperature is of
18.6 °C, with a minimum of
13.4 °C and a maximum of
23.9 °C.
On the coldest nights of the month, the temperature usually drops to around
8.5 °C. However, it dropped to
5 °C in August 2007.
On the warmest days of the month, the temperature usually reaches around
32 °C. However, it reached
37.4 °C in August 2003.
Precipitation amounts to
79 mm, distributed over 10 days.
The day lasts on average 14 hours and 25 minutes. So the days are long.
There are on average 6.5 hours of sunshine per day. So, the sun shines 45% of the time.
The average humidity is 74%. Hence, the air is normally humid.
September is generally a very mild month. The average temperature is of
15.1 °C, with a minimum of
10.3 °C and a maximum of
19.9 °C.
On the coldest nights of the month, the temperature usually drops to around
4.5 °C. However, it dropped to
1.3 °C in September 2018.
On the warmest days of the month, the temperature usually reaches around
27.5 °C. However, it reached
32.7 °C in September 2018.
Precipitation amounts to
62.9 mm, distributed over 9 days.
The day lasts on average 12 hours and 30 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 79%. Hence, the air is normally humid.
October is generally a mild month. The average temperature is of
11.2 °C, with a minimum of
7.3 °C and a maximum of
15.1 °C.
On the coldest nights of the month, the temperature usually drops to around
0.5 °C. However, it dropped to
-5.7 °C in October 2003.
On the warmest days of the month, the temperature usually reaches around
22.5 °C. However, it reached
25.8 °C in October 2018.
Precipitation amounts to
60.3 mm, distributed over 10 days.
The day lasts on average 10 hours and 35 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 34% of the time.
The average humidity is 83%. Hence, the air is normally humid.
November is generally a quite mild month. The average temperature is of
6.9 °C, with a minimum of
4 °C and a maximum of
9.7 °C.
On the coldest nights of the month, the temperature usually drops to around
-2 °C. However, it dropped to
-7.1 °C in November 2010.
On the warmest days of the month, the temperature usually reaches around
16 °C. However, it reached
20.3 °C in November 2014.
Precipitation amounts to
59.7 mm, distributed over 11 days.
The day lasts on average 8 hours and 55 minutes.
There are on average 2 hours of sunshine per day. So, the sun shines 22% of the time.
The average humidity is 86%. Hence, the air is normally humid.
December is generally a cold month. The average temperature is of
3.8 °C, with a minimum of
1.4 °C and a maximum of
6.3 °C.
On the coldest nights of the month, the temperature usually drops to around
-5.5 °C. However, it dropped to
-15.5 °C in December 2009.
On the warmest days of the month, the temperature usually reaches around
12.5 °C. However, it reached
16.5 °C in December 2019.
Precipitation amounts to
60.1 mm, distributed over 12 days.
The day lasts on average 8 hours and 0 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 1.5 hours of sunshine per day. So, the sun shines 20% of the time.
The average humidity is 86%. Hence, the air is normally humid.