What is the weather in Hallwil today?

At the top of the page you will find the current temperature, precipitation and wind in Hallwil, updated in real time.

What is the 15-day forecast for Hallwil?

The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Hallwil.

Will it rain tomorrow in Hallwil?

Check the 48-hour hourly forecast to see exactly when precipitation is expected in Hallwil.

What is the air quality in Hallwil?

The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Hallwil.

Are there weather alerts for Hallwil?

Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.

At what altitude is Hallwil located?

Hallwil sits at around 472 m above sea level in the canton of Aargau. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.

What is the warmest month in Hallwil?

The warmest month in Hallwil is July, averaging 18.9 °C (1991–2020 normal). The coldest is January at 0.8 °C.

How much does it rain in Hallwil per year?

Hallwil receives about 1014 mm of precipitation a year. The wettest month is July (108 mm), the driest February (60 mm).

When is the best time to visit Hallwil?

For warmth and sunshine: July (18.9 °C on average, 225 h of sun). The coldest month is January (0.8 °C). Check the 15-day forecast above for your dates.

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Weather in Hallwil

Aargau, 472 m · continuously updated

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Wind: –
Humidity: –
Rain ahead: –
Sunset: –

Temperature · last 4 and next 28 hours

Hallwil weather: the next 24 hours

Updated hourly.

Hallwil weather hour by hour (48 h)

Hallwil 15-day forecast

Two-week trend.

Hallwil weekend weather Rain radar

Sun and golden hours

Sunrise –, golden light until –

Sunset –, golden light from –

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Air quality

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European index, measured continuously.

UV index

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Daily maximum — protection advised from 3.

Freezing level

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Snow settles about 300 m below it.

Around Hallwil

Neighbouring municipalities, as the crow flies.

Leutwil2 km Dürrenäsch2 km Boniswil2 km Seengen2 km Seon3 km Egliswil3 km Teufenthal (AG)4 km Birrwil4 km

7-day forecast for Hallwil

Today (Sunday 27 Sep) in Hallwil: mostly sunny, 11 to 26 °C, precipitation 0.0 mm (0 %), wind up to 7 km/h. Tomorrow: overcast, 13 to 27 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	mostly sunny	11 °C	26 °C	0.0 mm	7 km/h
Tomorrow	overcast	13 °C	27 °C	0.0 mm	7 km/h
Tue 29 Sep	overcast	14 °C	26 °C	0.0 mm	6 km/h
Wed 30 Sep	overcast	16 °C	23 °C	0.3 mm	6 km/h
Thu 1 Oct	showers	14 °C	18 °C	4.5 mm	5 km/h
Fri 2 Oct	fog	13 °C	20 °C	0.0 mm	7 km/h
Sat 3 Oct	fog	14 °C	21 °C	0.0 mm	4 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 472 m). The interactive block at the top refreshes hourly and covers 16 days.

No rain expected in Hallwil today or tomorrow. The 15-minute detail for the next two hours is shown on demand.

Hourly weather in Hallwil

Sunday 27 Sep in Hallwil, hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 12 °C around 07:00, high 27 °C around 16:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	15 °C	5 km/h
01:00	sunny	15 °C	3 km/h
02:00	sunny	15 °C	2 km/h
03:00	sunny	14 °C	2 km/h
04:00	sunny	13 °C	2 km/h
05:00	sunny	13 °C	2 km/h
06:00	sunny	12 °C	1 km/h
07:00	sunny	12 °C	1 km/h
08:00	sunny	12 °C	1 km/h
09:00	sunny	14 °C	0 km/h
10:00	sunny	16 °C	2 km/h
11:00	sunny	19 °C	2 km/h
12:00	sunny	22 °C	2 km/h
13:00	sunny	24 °C	4 km/h
14:00	sunny	26 °C	7 km/h
15:00	sunny	27 °C	8 km/h
16:00	sunny	27 °C	7 km/h
17:00	sunny	27 °C	5 km/h
18:00	sunny	26 °C	2 km/h
19:00	sunny	23 °C	5 km/h
20:00	sunny	20 °C	6 km/h
21:00	sunny	18 °C	6 km/h
22:00	partly cloudy	18 °C	6 km/h
23:00	partly cloudy	17 °C	5 km/h

Hourly forecast issued 27.09.2026 for Hallwil (472 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Hallwil weather tomorrow

Tomorrow, Monday 28 Sep, in Hallwil: overcast, 13 to 27 °C, wind up to 7 km/h. No precipitation expected.

Hallwil weekend weather

This weekend in Hallwil: Saturday fog, 14 to 21 °C; Sunday mostly sunny, 11 to 26 °C.

Will it rain in Hallwil this week?

Yes: 1 day with precipitation is expected in Hallwil over the next 7 days, 4.8 mm in total. Wettest day: Thursday 1 Oct (4.5 mm).

The best day to go out in Hallwil

The best day of the next 7 in Hallwil: Sunday 27 Sep, mostly sunny, up to 26 °C.

The last 7 days in Hallwil

From 20 Sep to 26 Sep: 15.9 °C on average, 1.8 °C above the September normal (14.1 °C), 0 mm of precipitation (7-day normal: 18 mm). Warmest day: saturday 26 Sep (26 °C); coolest night: wednesday 23 Sep (7 °C).

Day	Min	Max
Sun 20 Sep	11 °C	25 °C
Mon 21 Sep	14 °C	20 °C
Tue 22 Sep	8 °C	20 °C
Wed 23 Sep	7 °C	22 °C
Thu 24 Sep	10 °C	21 °C
Fri 25 Sep	8 °C	22 °C
Sat 26 Sep	9 °C	26 °C

Open-Meteo analyses of the last 7 days (models and assimilated observations), MeteoSwiss 1991–2020 normals. Updated nightly.

Climate of Hallwil: 1991–2020 normals

In Hallwil (472 m), the mean annual temperature is 9.6 °C. The warmest month is July (18.9 °C on average) and the coldest January (0.8 °C). About 1014 mm of precipitation falls per year, peaking in July (108 mm) with a minimum in February (60 mm). The sun shines for about 1549 hours a year, mostly in July (225 h). On average there are 77 frost days and 15 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 32.7 °C and the absolute minimum −9.1 °C.

9.6 °CMean annual temperature

1014 mmPrecipitation per year

1549 hSunshine hours per year

77Frost days per year

57Summer days (≥ 25 °C)

JFMAMJJASOND

Mean monthly precipitation (mm) — bar height relative to the wettest month.

Month	Mean T	Abs. max	Abs. min	Precip. (mm)	Sunshine (h)	Frost days	Summer days
Jan	0.8 °C	11.0 °C	−9.1 °C	72	41	19	0
Feb	1.5 °C	13.3 °C	−8.4 °C	60	74	18	0
Mar	5.4 °C	18.8 °C	−5.1 °C	69	133	12	0
Apr	9.4 °C	23.5 °C	−1.8 °C	72	169	3	1
May	13.5 °C	27.5 °C	2.4 °C	106	183	0	5
Jun	17.2 °C	31.2 °C	6.2 °C	99	205	0	13
Jul	18.9 °C	32.7 °C	8.6 °C	108	225	0	18
Aug	18.3 °C	31.6 °C	8.0 °C	107	208	0	16
Sep	14.1 °C	26.5 °C	4.0 °C	76	151	0	5
Oct	9.7 °C	21.3 °C	0.1 °C	80	86	1	0
Nov	4.6 °C	15.0 °C	−4.1 °C	77	43	8	0
Dec	1.5 °C	11.4 °C	−7.7 °C	90	31	16	0
Year	9.6 °C	32.7 °C	−9.1 °C	1014	1549	77	57

Source: MeteoSwiss open data (1991–2020 normals) — stations Buchs / Aarau (10 km, 387 m), Gösgen (16 km, 380 m), Würenlingen / PSI (23 km, 334 m), adjusted to the elevation of Hallwil (472 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.