Weather in Bornheim

Forecast: MOSMIX (DWD-Statistik über ICON + ECMWF) · Run 09.08. 23:00 Uhr · Station BORNHEIM EICHENKAMP (2,9 km from the centre). We show where our data comes from – and how often we get it wrong. Measured against official stations, we were recently off by ±1,4 °C on average (up to 24 h), rain forecast 97 % correct.
Today: settled weather – historically easy to forecast.
We beat the "same as yesterday" rule of thumb by 56 %.

Now · as of 06:00

18°heiter

Later today

High · 16:00 Uhr28° Low18°

7 km/h aus S 24 % 65 % 1014 hPa 06:12 21:01 waning crescent (9 %)

Rain Radar

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The next few days

Day	Min	Max	Risk	Sun
Mo, 10.08.	18°	28°	2 %	10,8 h	06:12	21:01
Di, 11.08.	14°	25° 17:00	1 %	12,2 h	06:14	20:59
Mi, 12.08.	12°	30° 17:00	1 %	13,3 h	06:15	20:57
Do, 13.08.	15°	34° 17:00	1 %	13,1 h	06:17	20:55
Fr, 14.08.	19°	34° 16:00	3 %	11,2 h	06:19	20:54
Sa, 15.08.	19°	31° 16:00	7 %	8,0 h	06:20	20:52
So, 16.08.	18°	27° 16:00	12 %	6,7 h	06:22	20:50
Mo, 17.08.	17°	24° 16:00	16 %	6,2 h	06:23	20:48
Di, 18.08.	15°	23° 17:00	18 %	6,8 h	06:25	20:46
Mi, 19.08.	15°	22° 16:00	15 %	6,3 h	06:26	20:44

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 Bornheim the average temperature in August is 19,0 °C, in September it's 15,2 °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.

Mo, 10.08.28° stabil (±0,8 °C über 12 Läufe)

Di, 11.08.25° stabil (±0,8 °C über 12 Läufe)

Mi, 12.08.30° stabil (±0,7 °C über 12 Läufe)

Do, 13.08.34° wackelt noch (±1,0 °C über 12 Läufe)

Today at a glanceMo, 10.08.

Garden no frost

Low of 10,8 °C in 48 h, 0,0 mm rain in 24 h. Spray/watering window: 06:00 to 10:00 (5 h) – dry, calm, stays dry afterwards. Product-dependent – check the label.

Outdoors dry

06:00 to 05:00 (48 h) · gusts up to 35 km/h.

Pollen Mugwort: moderate to high load

Also Grasses low load.

Region Rhein.-Westfäl. Tiefland · As of 09.08., 11:00 Uhr · DWD pollen forecast

Balcony solar: today ≈ 3,69 kWh per kWp, tomorrow 4,22 kWh · Best 2 h for high loads today: 13:00 to 14:00 (south, vertical) – adjust to your orientation in the app.

Gauge Bonn (Rhein): 77 cm · gauge station 8,3 km away · source: WSV

Climate in Bornheim (1991-2020)

The warmest month in Bornheim is Juli (avg 19,5 °C), the coldest is Januar (avg 3,2 °C). The most rain falls in Juli (avg 71,2 mm), the least in April (avg 36,9 mm). The sunniest month is Juli (avg 212,3 h).

Annual mean 11,0 °C, 637 mm precipitation, 1595 hours of sunshine, 52 frost days. Weather station Bonn (7,6 km away).

Record on 10.08.: 35,1 °C (1998), coldest value 8,2 °C (1955), highest rainfall 36,9 mm (1981) – series since 1937