Ahaus (German pronunciation:[ˈaːhaʊs]ⓘ; Westphalian: Ausen) is a town in the district of Borken in the state of North Rhine-Westphalia, Germany. It is located near the border with the Netherlands, lying some 20km south-east of Enschede and 15km south from Gronau. Ahaus is the location of one of Germany's interim storage facilities for radioactive spent fuel.

History

The first written mention of the aristocratic seat of Haus an der Aa dates from around 1030. Around 1120, Bernhard von Diepenheim commissioned the construction of the predecessor to the present-day Ahaus Castle. In 1154, his son Lifhard called himself von Ahaus for the first time. The lords of Ahaus belonged to the smaller noble dynasties in Westphalia in the wider environment of the Munster bishops. They got into a fight with them in 1176 when the nobleman Johann von Ahaus gave his castle as a fief to the Archbishop of Cologne. In 1177, however, John had to surrender to Prince Bishop Hermann II of Münster. The castles of Ahaus and Diepenheim, which belonged to the noble lords of Ahaus, were destroyed. Nevertheless, the noble lords remained in possession of their rule.

In 1389 the noble lords of Ahaus granted the castle settlement an excise privilege. Two years later, Ahaus received city rights. In 1406, the Prince-Bishop of Münster, Otto IV von Hoya, bought the lordship of Ahaus and incorporated it into the Bishopric of Münster. It was combined by the Bishopric of Münster together with 24 parishes, which extended over large parts of West Münsterland, to form the Amt of Ahaus. It lasted until it was dissolved by the Reichsdeputationshauptschluss in 1803.

Politics

The current mayor is Karola Voß who has been serving as mayor since 2015. In the 2025 local elections she was reelected with 90% of the votes.

Council

After the 2025 elections, the Ahaus city council is composed as follows:

PartyVotes%+/-Seats+/-
Christian Democratic Union (CDU)9,70051.15.4222
Independent Voters Association (UWG)3,09916.30.67±0
Alliance 90/The Greens (Grüne)1,6658.83.941
Social Democratic Party (SPD)1,6258.63.641
Free Democratic Party (FDP)7934.20.32±0
The Left (Die Linke)6703.52.911
Voters Association social Ahaus (WSA)6373.4New1New
Voters Association Ahaus worth living (WLA)5342.80.61±0
Independent Tobias Groten1780.9New0New
Independent Christoph Bromisch890.5New0New
Valid votes18,99098.0
Invalid votes3852.0
Total19,375100.042±0
Electorate/voter turnout32,13260.3
Source:

Climate

Ahaus has an oceanic climate (Köppen: Cfb; Trewartha: Dobk).

Climate data for Ahaus, 1991–2020 normals, extremes 2006–present
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F)16.1 (61.0)19.3 (66.7)24.5 (76.1)28.5 (83.3)32.3 (90.1)35.9 (96.6)39.5 (103.1)36.6 (97.9)32.2 (90.0)28.0 (82.4)19.8 (67.6)16.5 (61.7)39.5 (103.1)
Mean maximum °C (°F)11.7 (53.1)12.4 (54.3)17.7 (63.9)23.9 (75.0)27.1 (80.8)30.9 (87.6)33.3 (91.9)31.4 (88.5)27.3 (81.1)22.1 (71.8)16.3 (61.3)12.6 (54.7)34.9 (94.8)
Mean daily maximum °C (°F)5.4 (41.7)6.5 (43.7)10.0 (50.0)15.4 (59.7)18.8 (65.8)21.9 (71.4)24.0 (75.2)23.0 (73.4)19.5 (67.1)14.7 (58.5)9.6 (49.3)6.3 (43.3)14.6 (58.3)
Daily mean °C (°F)3.1 (37.6)3.5 (38.3)5.8 (42.4)10.1 (50.2)13.7 (56.7)16.8 (62.2)18.6 (65.5)17.7 (63.9)14.5 (58.1)10.9 (51.6)6.9 (44.4)4.2 (39.6)10.5 (50.9)
Mean daily minimum °C (°F)0.6 (33.1)0.5 (32.9)1.7 (35.1)4.3 (39.7)8.0 (46.4)11.2 (52.2)12.8 (55.0)12.3 (54.1)9.5 (49.1)7.1 (44.8)3.9 (39.0)1.7 (35.1)6.1 (43.0)
Mean minimum °C (°F)−7.3 (18.9)−5.5 (22.1)−4.3 (24.3)−2.2 (28.0)1.1 (34.0)5.8 (42.4)6.9 (44.4)7.0 (44.6)3.8 (38.8)0.6 (33.1)−2.9 (26.8)−5.3 (22.5)−9.4 (15.1)
Record low °C (°F)−17.1 (1.2)−16.0 (3.2)−9.1 (15.6)−5.7 (21.7)−1.0 (30.2)3.4 (38.1)4.9 (40.8)5.0 (41.0)0.7 (33.3)−4.0 (24.8)−7.2 (19.0)−14.3 (6.3)−17.1 (1.2)
Average precipitation mm (inches)76.2 (3.00)56.7 (2.23)57.6 (2.27)29.7 (1.17)49.6 (1.95)64.1 (2.52)75.8 (2.98)97.5 (3.84)58.9 (2.32)65.1 (2.56)65.5 (2.58)78.1 (3.07)774.9 (30.51)
Average extreme snow depth cm (inches)3.5 (1.4)1.2 (0.5)0.1 (0.0)0 (0)0 (0)0 (0)0 (0)0 (0)0 (0)0 (0)0.3 (0.1)2.9 (1.1)4.7 (1.9)
Average precipitation days (≥ 0.1 mm)19.815.915.911.913.413.715.817.413.315.718.120.7191.8
Average relative humidity (%)87.883.878.070.770.072.673.377.181.485.388.389.179.8
Mean monthly sunshine hours43.870.4128.6191.0207.1202.9218.2188.5147.8100.756.440.81,596.3
Source: Deutscher Wetterdienst/SKlima.de

Twin towns – sister cities

Ahaus is twinned with:

Notable people

Transport links

Ahaus is located in the Dortmund–Gronau railway and in the area of the fare association Westfalen-Tarif.

See also