A consolidated reference for Dortmund climate: monthly averages, rebuilt from public data on a schedule. Expect 1.0 C at the coldest (Jan) and 18.8 C at the warmest (Jul) — a 17.8 C spread. Expect a wet month and a dry month but no real season: 2.92 mm/day in Jan against 1.58 mm/day in Apr. Taken together that is roughly 882 mm of rain a year for the grid cell. Every run re-reads the source and only rewrites this page when a figure actually changed. Use the table for exact numbers, or the related pages below for neighbouring locations and periods.
Annual mean temperature 9.6 C
Warmest month Jul (18.8 C)
Coldest month Jan (1.0 C)
Wettest month Jan (2.92 mm/day)
All-time record high 39.2 C
All-time record low -17.5 C
Annual precipitation 883 mm / year
Coordinates 51.51494, 7.466
Population 588,462
Average monthly temperature and rainfall in Dortmund
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
1.0
2.92
12.3
-14.9
Feb
1.6
2.47
16.7
-17.5
Mar
4.6
2.07
20.6
-9.9
Apr
9.0
1.58
25.9
-5.4
May
12.9
2.23
30.6
-1.6
Jun
16.5
2.36
33.9
3.5
Jul
18.8
2.66
39.2
6.6
Aug
18.4
2.70
36.9
5.4
Sep
14.6
2.22
32.0
3.3
Oct
10.1
2.21
26.6
-5.0
Nov
5.5
2.69
19.4
-7.3
Dec
2.1
2.89
13.7
-13.9
What the Dortmund climate table shows
Values are multi-decadal climatological averages for the 51.51494, 7.466 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
How much rain is 2.92 mm/day in a month?
Rain is recorded as a daily mean, so 2.92 mm/day is roughly 89 mm across a 30-day month.
Does Dortmund get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.