Trier (Trier in German) is a city of 110,000 inhabitants, located in southwestern Germany, in the state of
, along the Moselle River, and a short distance from the border with Luxembourg.
The city is located at 130 meters (425 feet) above sea level, but the meteorological station is located on the Petrisberg hill, at 260 meters (855 ft).
. The temperature rarely drops below -10 °C (14 °F), although it occasionally drops below -15 °C (5 °F). The coldest record is -19.3 °C (-2.7 °F), set in February 1929 and February 1956.
, usually of short duration, during which the temperature can reach or exceed 35 °C (95 °F). The heat record is 40.6 °C (105.1 °F), set in July 2019.
to visit Trier 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 °C, with a minimum of
-0.4 °C and a maximum of
4.5 °C.

On the coldest nights of the month, the temperature usually drops to around
-8.5 °C. However, it dropped to
-15.6 °C in January 1997.

On the warmest days of the month, the temperature usually reaches around
11.5 °C. However, it reached
14 °C in January 2011.

Precipitation amounts to
63.5 mm, distributed over 12 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 18% of the time.
The average humidity is 87%. Hence, the air is normally humid.
February is generally a cold month. The average temperature is of
2.9 °C, with a minimum of
-0.2 °C and a maximum of
6.1 °C.

On the coldest nights of the month, the temperature usually drops to around
-7.5 °C. However, it dropped to
-16.1 °C in February 2012.

On the warmest days of the month, the temperature usually reaches around
13.5 °C. However, it reached
20.3 °C in February 2019.

Precipitation amounts to
53 mm, distributed over 10 days.
The day lasts on average 10 hours and 10 minutes.

There are on average 2.5 hours of sunshine per day. So, the sun shines 25% of the time.
The average humidity is 82%. 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
2.2 °C and a maximum of
10.8 °C.

On the coldest nights of the month, the temperature usually drops to around
-4 °C. However, it dropped to
-13.9 °C in March 2005.

On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
23 °C in March 1998.

Precipitation amounts to
51.3 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 75%. Hence, the air is normally humid.
April is generally a mild month. The average temperature is of
10.2 °C, with a minimum of
4.9 °C and a maximum of
15.5 °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
24.5 °C. However, it reached
29.3 °C in April 2018.

Precipitation amounts to
45.2 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 45% of the time.
The average humidity is 69%.
May is generally a mild month. The average temperature is of
14.2 °C, with a minimum of
8.7 °C and a maximum of
19.6 °C.

On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-1.1 °C in May 2019.

On the warmest days of the month, the temperature usually reaches around
28.5 °C. However, it reached
34.3 °C in May 2017.

Precipitation amounts to
68 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 45% 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
17.4 °C, with a minimum of
11.8 °C and a maximum of
23 °C.

On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
1.3 °C in June 1991.

On the warmest days of the month, the temperature usually reaches around
31.5 °C. However, it reached
37.2 °C in June 2017.

Precipitation amounts to
65.2 mm, distributed over 10 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 71%. Hence, the air is normally humid.
July, the warmest month of the year, is generally a warm month. The average temperature is of
19.5 °C, with a minimum of
13.8 °C and a maximum of
25.2 °C.

On the coldest nights of the month, the temperature usually drops to around
9 °C. However, it dropped to
6.4 °C in July 2011.

On the warmest days of the month, the temperature usually reaches around
33.5 °C. However, it reached
40.6 °C in July 2019.

Precipitation amounts to
75.6 mm, distributed over 10 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 70%.
August is generally a warm month. The average temperature is of
19 °C, with a minimum of
13.2 °C and a maximum of
24.8 °C.

On the coldest nights of the month, the temperature usually drops to around
8 °C. However, it dropped to
5.7 °C in August 1993.

On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
39 °C in August 2003.

Precipitation amounts to
62.9 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 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 72%. 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 °C and a maximum of
20.2 °C.

On the coldest nights of the month, the temperature usually drops to around
5 °C. However, it dropped to
1.6 °C in September 2018.

On the warmest days of the month, the temperature usually reaches around
27.5 °C. However, it reached
34.2 °C in September 2016.

Precipitation amounts to
60.7 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 43% of the time.
The average humidity is 78%. Hence, the air is normally humid.
October is generally a mild month. The average temperature is of
10.7 °C, with a minimum of
6.8 °C and a maximum of
14.6 °C.

On the coldest nights of the month, the temperature usually drops to around
0.5 °C. However, it dropped to
-5.2 °C in October 2012.

On the warmest days of the month, the temperature usually reaches around
22.5 °C. However, it reached
27.5 °C in October 2011.

Precipitation amounts to
64.6 mm, distributed over 10 days.
The day lasts on average 10 hours and 40 minutes.

There are on average 3 hours of sunshine per day. So, the sun shines 29% of the time.
The average humidity is 84%. Hence, the air is normally humid.
November is generally a quite cold month. The average temperature is of
5.9 °C, with a minimum of
3.2 °C and a maximum of
8.5 °C.

On the coldest nights of the month, the temperature usually drops to around
-3 °C. However, it dropped to
-11 °C in November 1998.

On the warmest days of the month, the temperature usually reaches around
15.5 °C. However, it reached
18.8 °C in November 2018.

Precipitation amounts to
63.5 mm, distributed over 12 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 17% of the time.
The average humidity is 88%. Hence, the air is normally humid.
December is generally a cold month. The average temperature is of
2.8 °C, with a minimum of
0.5 °C and a maximum of
5.1 °C.

On the coldest nights of the month, the temperature usually drops to around
-7 °C. However, it dropped to
-15.8 °C in December 2009.

On the warmest days of the month, the temperature usually reaches around
12 °C. However, it reached
15.8 °C in December 2019.

Precipitation amounts to
76.8 mm, distributed over 13 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 hours of sunshine per day. So, the sun shines 15% of the time.
The average humidity is 89%. Hence, the air is normally humid.