Mainz is a city of 220,000 inhabitants, located in the south-west of Germany, in the state of
, at the confluence of the rivers Main and Rhine, and at 50 degrees north latitude.
Nearby, but on the other side of the river, in Hesse, are other cities (Frankfurt am Main, Wiesbaden, Darmstadt, Offenbach, and Hanau) and all together make up the metropolitan region
. The temperature rarely drops below -10 °C (14 °F), although it has dropped below -20 °C (-4 °F) in the past.
, usually of short duration, during which the temperature can reach or exceed 35 °C (95 °F). The heat record is 39.1 °C (102.4 °F), set in July 2019. Due to the location in the Rhine Valley, the muggy heat is felt on hot days.
to visit Mainz runs from mid-May to mid-September, since it is the warmest and sunniest period of the year. Sometimes, it can be hot in July and August, while in other circumstances, nights can be cool or even a little cold even in these months, so it can be useful to bring a sweatshirt or sweater and a light jacket.
. Here are the average temperatures.
January, the coldest month of the year, is generally a cold month. The average temperature is of
2.4 °C, with a minimum of
0 °C and a maximum of
4.8 °C.
On the coldest nights of the month, the temperature usually drops to around
-7.5 °C. However, it dropped to
-13.9 °C in January 1997.
On the warmest days of the month, the temperature usually reaches around
12 °C. However, it reached
15.4 °C in January 2007.
Precipitation amounts to
41.4 mm, distributed over 10 days.
The day lasts on average 8 hours and 40 minutes.
There are on average 1.5 hours of sunshine per day. So, the sun shines 19% of the time.
The average humidity is 82%. Hence, the air is normally humid.
February is generally a cold month. The average temperature is of
3.3 °C, with a minimum of
0.2 °C and a maximum of
6.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-6 °C. However, it dropped to
-15.7 °C in February 2012.
On the warmest days of the month, the temperature usually reaches around
13.5 °C. However, it reached
18.3 °C in February 2019.
Precipitation amounts to
39.6 mm, distributed over 8 days.
The day lasts on average 10 hours and 10 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 28% of the time.
The average humidity is 77%. Hence, the air is normally humid.
March is generally a quite mild month. The average temperature is of
7.2 °C, with a minimum of
3.1 °C and a maximum of
11.3 °C.
On the coldest nights of the month, the temperature usually drops to around
-2.5 °C. However, it dropped to
-9.9 °C in March 2005.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
24.5 °C in March 1998.
Precipitation amounts to
40.6 mm, distributed over 9 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 37% of the time.
The average humidity is 68%.
April is generally a mild month. The average temperature is of
11.3 °C, with a minimum of
6.3 °C and a maximum of
16.4 °C.
On the coldest nights of the month, the temperature usually drops to around
0 °C. However, it dropped to
-3.6 °C in April 2003.
On the warmest days of the month, the temperature usually reaches around
25 °C. However, it reached
29.4 °C in April 2007.
Precipitation amounts to
39.1 mm, distributed over 8 days.
The day lasts on average 13 hours and 55 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 60%.
May is generally a very mild month. The average temperature is of
15.2 °C, with a minimum of
10.1 °C and a maximum of
20.4 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
1.2 °C in May 2019.
On the warmest days of the month, the temperature usually reaches around
29 °C. However, it reached
34 °C in May 2005.
Precipitation amounts to
56.4 mm, distributed over 10 days.
The day lasts on average 15 hours and 30 minutes. So the days are long.
There are on average 7 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 64%.
June is generally a warm month. The average temperature is of
18.6 °C, with a minimum of
13.3 °C and a maximum of
23.8 °C.
On the coldest nights of the month, the temperature usually drops to around
8 °C. However, it dropped to
2.9 °C in June 1991.
On the warmest days of the month, the temperature usually reaches around
32 °C. However, it reached
38.1 °C in June 2019.
Precipitation amounts to
53.6 mm, distributed over 8 days.
The day lasts on average 16 hours and 20 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 7.5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 64%.
July, the warmest month of the year, is generally a warm month. The average temperature is of
20.7 °C, with a minimum of
15.4 °C and a maximum of
26 °C.
On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
7.8 °C in July 2000.
On the warmest days of the month, the temperature usually reaches around
34 °C. However, it reached
39.1 °C in July 2019.
Precipitation amounts to
62.7 mm, distributed over 9 days.
The day lasts on average 15 hours and 50 minutes. So the days are long.
There are on average 7.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 60%.
August is generally a warm month. The average temperature is of
20.2 °C, with a minimum of
14.8 °C and a maximum of
25.6 °C.
On the coldest nights of the month, the temperature usually drops to around
9.5 °C. However, it dropped to
6 °C in August 1993.
On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
38.9 °C in August 2003.
Precipitation amounts to
51.5 mm, distributed over 9 days.
The day lasts on average 14 hours and 20 minutes. So the days are long.
There are on average 7.5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 63%.
September is generally a very mild month. The average temperature is of
15.9 °C, with a minimum of
11.2 °C and a maximum of
20.6 °C.
On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
2 °C in September 1995.
On the warmest days of the month, the temperature usually reaches around
27 °C. However, it reached
31.4 °C in September 2016.
Precipitation amounts to
46.8 mm, distributed over 8 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 44% of the time.
The average humidity is 68%.
October is generally a mild month. The average temperature is of
10.9 °C, with a minimum of
7.3 °C and a maximum of
14.5 °C.
On the coldest nights of the month, the temperature usually drops to around
1 °C. However, it dropped to
-4.5 °C in October 2012.
On the warmest days of the month, the temperature usually reaches around
21.5 °C. However, it reached
26.6 °C in October 2018.
Precipitation amounts to
51.1 mm, distributed over 9 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 31% of the time.
The average humidity is 79%. Hence, the air is normally humid.
November is generally a quite cold month. The average temperature is of
6.1 °C, with a minimum of
3.6 °C and a maximum of
8.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-2 °C. However, it dropped to
-6.6 °C in November 1993.
On the warmest days of the month, the temperature usually reaches around
15 °C. However, it reached
18.9 °C in November 2015.
Precipitation amounts to
48.2 mm, distributed over 10 days.
The day lasts on average 9 hours and 0 minutes.
There are on average 1.5 hours of sunshine per day. So, the sun shines 19% 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
3.1 °C, with a minimum of
0.8 °C and a maximum of
5.3 °C.
On the coldest nights of the month, the temperature usually drops to around
-6.5 °C. However, it dropped to
-16.5 °C in December 2009.
On the warmest days of the month, the temperature usually reaches around
12 °C. However, it reached
14.6 °C in December 2006.
Precipitation amounts to
55 mm, distributed over 10 days.
The day lasts on average 8 hours and 10 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 16% of the time.
The average humidity is 87%. Hence, the air is normally humid.