Weather in Aachen

Forecast: MOSMIX (DWD-Statistik über ICON + ECMWF) · Run 21.09. 23:00 Uhr · Station AACHEN (1,4 km from the centre) · own station correction −2,0 °C (from our station comparison). We show where our data comes from – and how often we get it wrong. Measured against official stations, we were recently off by ±1,2 °C here (up to 24 h), rain forecast 86 % correct.
Today: settled weather – historically easy to forecast.
We beat the "same as yesterday" rule of thumb by 56 %.

Now · as of 06:00

7°heiter

Later today

High · 17:00 Uhr17° Low7°

2 km/h aus SW 37 % 100 % 1030 hPa Rain last 24 h 0,0 mm (measured, as of 05:00) 07:22 19:33 waxing gibbous (82 %)

Rain Radar

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The next few days

Day	Min	Max	Risk	Sun
Di, 22.09.	7°	17°	2 %	4,6 h	07:22	19:33
Mi, 23.09.	7°	19° 16:00	3 %	8,4 h	07:24	19:31
Do, 24.09.	9°	17° 16:00	8 %	6,9 h	07:25	19:28
Fr, 25.09.	6°	20° 17:00	2 %	10,4 h	07:27	19:26
Sa, 26.09.	9°	21° 17:00	3 %	9,5 h	07:29	19:24
So, 27.09.	12°	22° 16:00	5 %	8,2 h	07:30	19:22
Mo, 28.09.	13°	21° 16:00	7 %	6,6 h	07:32	19:19
Di, 29.09.	12°	22° 17:00	8 %	6,5 h	07:33	19:17
Mi, 30.09.	12°	21° 16:00	7 %	7,5 h	07:35	19:15
Do, 01.10.	12°	19° 16:00	9 %	6,5 h	07:36	19:13

Outlook: the next few weeks

A genuine day-by-day forecast only reaches about 10 days out – anything beyond that is statistics, not a forecast. That's why we don't show a 30- or 90-day outlook. What can be honestly stated is the long-term normal: in Aachen the average temperature in September is 14,9 °C, in October it's 11,0 °C (1991-2020 climate mean for the local climate station, see below). We show openly how often our forecast actually holds up.

How reliable is the forecast?

How our forecast daily high has shifted across recent runs. Flat line = the forecast is holding, jittery = still shifting.

Di, 22.09.17° wackelt noch (±1,0 °C über 12 Läufe)

Mi, 23.09.19° stabil (±0,7 °C über 12 Läufe)

Do, 24.09.17° wackelt noch (±1,3 °C über 12 Läufe)

Fr, 25.09.20° wackelt noch (±1,4 °C über 12 Läufe)

Today at a glanceDi, 22.09.

Garden no frost

Low of 4,8 °C in 48 h, 0,0 mm rain in 24 h. Spray/watering window: 06:00 to 05:00 (48 h) – dry, calm, stays dry afterwards. Product-dependent – check the label.

Outdoors dry

06:00 to 05:00 (48 h) · gusts up to 17 km/h.

Pollen Grasses: none to low load

Also Ragweed none to low load.

Region Rhein.-Westfäl. Tiefland · As of 21.09., 11:00 Uhr · DWD pollen forecast

Balcony solar: today ≈ 2,50 kWh per kWp, tomorrow 3,97 kWh · Best 2 h for high loads today: 14:00 to 15:00 (south, vertical) – adjust to your orientation in the app.

Climate in Aachen (1991-2020)

The warmest month in Aachen is Juli (avg 18,7 °C), the coldest is Januar (avg 3,3 °C). The most rain falls in August (avg 77,6 mm), the least in April (avg 47,0 mm). The sunniest month is Juli (avg 211,6 h).

Annual mean 10,7 °C, 774 mm precipitation, 1653 hours of sunshine, 60 frost days. Weather station Aachen (1,0 km away).

Record on 22.09.: 29,1 °C (2006), coldest value 3,6 °C (1997), highest rainfall 21,6 mm (2004) – series since 1963

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