worldweather

Weather in Winterthur - 14-day forecast

Detailed weather forecast for Winterthur, Switzerland: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Winterthur
today🌧️ 23°💧 5.1 mm
Sun☁️ 24°💧 5.3 mm
Mon🌧️ 24°💧 1.1 mm
Tue🌧️ 27°💧 3.1 mm
Wed🌧️ 14°💧 11.1 mm
Thu☁️ 21°💧 1.4 mm
Fri🌧️ 23°💧 3 mm
Sat🌧️ 22°💧 1.1 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Tuesday 8 Sept in Winterthur, the forecast high is 27°C. Typical daytime temperatures at this time of year range from 16°C to 23°C, so it will be exceptionally warm. It is warmer than 100% of similar days.

23°Cwarmer than usual
usually 17°C–23°C
warmer than 79% of similar days
night: exceptionally warm rain: more rain than usual wind: typical
24°Cexceptionally warm
usually 16°C–23°C
warmer than 90% of similar days
night: exceptionally warm rain: more rain than usual wind: lighter than usual
24°Cwarmer than usual
usually 16°C–23°C
warmer than 88% of similar days
night: exceptionally warm rain: typical rainfall wind: typical
27°Cexceptionally warm
usually 16°C–23°C
warmer than 100% of similar days
night: exceptionally warm rain: typical rainfall wind: lighter than usual
14°Cexceptionally cool
usually 16°C–23°C
cooler than 93% of similar days
night: near normal rain: exceptionally wet wind: exceptionally light
21°Cnear normal
usually 16°C–23°C
night: near normal rain: typical rainfall wind: exceptionally light
23°Cwarmer than usual
usually 16°C–23°C
warmer than 78% of similar days
night: exceptionally warm rain: more rain than usual wind: typical

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
10°20°30° 1981: 20°C1982: 21°C1983: 19°C1984: 13°C1985: 17°C1986: 18°C1987: 20°C1988: 21°C1989: 20°C1990: 16°C1991: 22°C1992: 18°C1993: 18°C1994: 20°C1995: 19°C1996: 15°C1997: 20°C1998: 20°C1999: 22°C2000: 20°C2001: 14°C2002: 20°C2003: 19°C2004: 23°C2005: 23°C2006: 23°C2007: 16°C2008: 22°C2009: 20°C2010: 19°C2011: 22°C2012: 22°C2013: 20°C2014: 21°C2015: 17°C2016: 22°C2017: 18°C2018: 23°C2019: 16°C2020: 21°C2021: 23°C2022: 22°C2023: 26°C2024: 21°C2025: 20°C 2026 forecast: 22°C current forecast 22°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 20°C by day. The coolest year was 1984 (13°C) and the warmest was 2023 (26°C). The current forecast averages 22°C - higher than in 80% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

Weather warnings - Winterthur

No active weather warnings for Winterthur (region: Kreis Konstanz). The national weather service is not forecasting dangerous conditions.

14-day forecast - Winterthur

Winterthur - 14-day weather forecast infographic

Winterthur 30 & 45-day weather - long-range outlook

Next 16 days · forecast
23°
around 16° at night · days with rain: 10
Weeks 3-4 · avg for September
20°
around 11° at night · rain chance 44%
Weeks 5-7 · avg for October
15°
around 7° at night · rain chance 45%
The 30 & 45-day outlook for Winterthur: the next 16 days are a numerical forecast updated daily - on average 23° by day and 16° at night. Further out we rely on multi-year climate averages: around 20° in September, and about 15° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Winterthur

Saturday5 September 2026
🌧️23°moderate rain
sunrise 06:48 · sunset 19:58 · night 20° · evening 26° · rain 5.05 mm · humidity 72% · wind 4 m/s · clouds 83%
Sunday6 September 2026
☁️24°broken clouds
sunrise 06:50 · sunset 19:56 · night 17° · evening 27° · rain 5.31 mm · humidity 51% · wind 2 m/s · clouds 55%
Monday7 September 2026
🌧️24°light rain
sunrise 06:51 · sunset 19:54 · night 17° · evening 24° · rain 1.08 mm · humidity 60% · wind 4 m/s · clouds 48%
Tuesday8 September 2026
🌧️27°light rain
sunrise 06:52 · sunset 19:52 · night 17° · evening 18° · rain 3.06 mm · humidity 46% · wind 3 m/s · clouds 89%
Wednesday9 September 2026
🌧️14°moderate rain
sunrise 06:54 · sunset 19:50 · night 11° · evening 13° · rain 11.08 mm · humidity 96% · wind 2 m/s · clouds 100%
Thursday10 September 2026
☁️21°broken clouds
sunrise 06:55 · sunset 19:48 · night 12° · evening 14° · rain 1.41 mm · humidity 40% · wind 2 m/s · clouds 83%
Friday11 September 2026
🌧️23°light rain
sunrise 06:56 · sunset 19:46 · night 15° · evening 15° · rain 3 mm · humidity 37% · wind 4 m/s · clouds 78%
Saturday12 September 2026
🌧️22°light rain
sunrise 06:58 · sunset 19:44 · night 17° · evening 17° · rain 1.11 mm · humidity 47% · wind 4 m/s · clouds 38%
Sunday13 September 2026
🌧️19°moderate rain
sunrise 06:59 · sunset 19:42 · night 12° · evening 14° · rain 4.26 mm · humidity 61% · wind 2 m/s · clouds 96%
Monday14 September 2026
☀️22°clear sky
sunrise 07:00 · sunset 19:40 · night 13° · evening 16° · rain 0.57 mm · humidity 53% · wind 3 m/s · clouds 6%
Tuesday15 September 2026
🌧️27°light rain
sunrise 07:02 · sunset 19:38 · night 17° · evening 20° · rain 0.72 mm · humidity 45% · wind 4 m/s · clouds 54%
Wednesday16 September 2026
🌧️17°light rain
sunrise 07:03 · sunset 19:36 · night 14° · evening 15° · rain 8.49 mm · humidity 92% · wind 3 m/s · clouds 99%
Thursday17 September 2026
🌤️24°scattered clouds
sunrise 07:04 · sunset 19:34 · night 14° · evening 17° · rain 0.18 mm · humidity 46% · wind 2 m/s · clouds 25%
Friday18 September 2026
☀️25°clear sky
sunrise 07:06 · sunset 19:32 · night 16° · evening 19° · rain 0.51 mm · humidity 51% · wind 2 m/s · clouds 1%
Saturday19 September 2026
☀️27°clear sky
sunrise 07:07 · sunset 19:30 · night 17° · evening 20° · humidity 46% · wind 2 m/s · clouds 2%
Sunday20 September 2026
🌤️27°a few clouds
sunrise 07:08 · sunset 19:28 · night 20° · evening 20° · humidity 47% · wind 1 m/s · clouds 24%

UV index in Winterthur - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTWinterthur03681111+5.4UV MODERATEtoday, daily maxSeek shade around midday. SPF 30+, sunglasses and ahat for longer stays.Unprotected fair skin may burn in about 35 min5Sat5.096Sun6.095Mon7.095Tue8.091Wed9.093Thu10.094Fri11.095Sat12.091Sun13.094Mon14.095Tue15.095Wed16.092Thu17.092Fri18.093Sat19.091Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Winterthur is 5 (moderate) - unprotected fair skin can burn in about 35 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

Pollen in Winterthur - info for allergy sufferers

PLANT POLLEN · 4-DAY FORECASTWinterthurHighest pollen today: Ragweed5 grains/m³ · low leveltoday5.09tomorrow6.09Mon7.09Tue8.09Grasses2422Mugwort---1Ragweed544-nonelowmoderatehighvery highoff season: alder, birch, olive · values in grains/m³ (daily peak)pogodapodroze.pl · 2026-09-05
Today ragweed pollen is highest in Winterthur - about 5 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

Winterthur weather through the year

Winterthur - annual climate

Warmest, driest months on average: April, May, June, July.

Upcoming public holidays in Switzerland: Christmas Day — 25 December · New Year's Day — 1 January · Ascension Day — 6 May.

Nearby and related places

ZurichZermattSt. GallenLuganoBernLausanne

FAQ - Winterthur weather

What is the weather like in Winterthur today?
Today it is about 23° during the day and 20° at night, moderate rain.
How far ahead can I check the forecast for Winterthur?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.