Winterthur, Switzerland experiences average highs of 15°C (59°F) and lows of 6°C (43°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Average highs have warmed by 0.9°C (1.6°F) across the available records.
Winterthur, Switzerland Weather & Climate 2026
Monthly climate averages for Winterthur, Switzerland. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.1/10
Best: June, July, August, September
UV Index
4
Low
Temperature 15°C / 6°C
Feels Like 13°C / 5°C
Rainy Days 13
Rainfall 94 mm
Sunshine 8 h
Humidity 78%
Wind Speed 12 km/h
Dew Point 7°C
Snow Days 6 days
Frost Days 13 days
Hottest Month
24°C
August
Avg Low15°C
Rain11days
Coldest Month
-2°C
January
Avg High5°C
Rain14days
Driest Month
11days
February
Avg High8°C
Avg Low-1°C
Windiest Month
13 km/h
February (Gusts 34)
Worst Time to Visit
Consider avoiding January, February, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:29
Daylight 15.9h
Sunset 21:25
Live conditions—
Winterthur on the map · live conditions
Winterthur, Switzerland
- Continent
- Europe
- Country
- Switzerland
- City
- Winterthur
- Population
- 111.8K
- Coordinates
- 47.51°, 8.72°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 5°C
Rain 13 days/mo
Summer
Jun–Aug
Avg High 24°C
Avg Low 15°C
Rain 13 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 7°C
Rain 12 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 6°C
Avg Low -1°C
Rain 13 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 5°C / -2°C . Feb: 8°C / -1°C . Mar: 11°C / 1°C . Apr: 14°C / 4°C . May: 17°C / 8°C . Jun: 23°C / 14°C . Jul: 24°C / 15°C . Aug: 24°C / 15°C . Sep: 20°C / 12°C . Oct: 15°C / 8°C . Nov: 9°C / 2°C . Dec: 6°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 105 mm. Feb: 68 mm. Mar: 72 mm. Apr: 82 mm. May: 126 mm. Jun: 120 mm. Jul: 90 mm. Aug: 116 mm. Sep: 88 mm. Oct: 80 mm. Nov: 83 mm. Dec: 93 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 82%. Feb: 79%. Mar: 74%. Apr: 72%. May: 75%. Jun: 73%. Jul: 71%. Aug: 73%. Sep: 78%. Oct: 82%. Nov: 86%. Dec: 86%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 13 km/h . Mar: 13 km/h . Apr: 13 km/h . May: 12 km/h . Jun: 12 km/h . Jul: 11 km/h . Aug: 10 km/h . Sep: 10 km/h . Oct: 10 km/h . Nov: 11 km/h . Dec: 11 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 8h. Apr: 10h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 7h. Nov: 5h. Dec: 5h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 2. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 6. Aug: UV 6. Sep: UV 4. Oct: UV 3. Nov: UV 2. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 11 days. Feb: 6 days. Mar: 5 days. Apr: 3 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 4 days. Dec: 8 days.
Climate Trends
Average highs have warmed by 0.9°C (1.6°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jun 2025 · 25°C | Aug · 24°C |
| Coldest month | Jan 2025 · -2°C | Jan · -2°C |
| Wettest month | Aug 2025 · 174 mm | May · 126 mm |
| Windiest month | Oct 2025 · 13 km/h | Feb · 13 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -2°C | 1°C / -5°C | 14days (105 mm) Wet | 5.2h Fair | 82% Humid | 1.5 Low | Poor | View Details |
| February | 8°C / -1°C | 5°C / -4°C | 11days (68 mm) Wet | 6.5h Fair | 79% Humid | 2.2 Moderate | Poor | View Details |
| March | 11°C / 1°C | 8°C / -2°C | 12days (72 mm) Wet | 8.3h Good | 74% Muggy | 3.5 Moderate | Poor | View Details |
| April | 14°C / 4°C | 12°C / 2°C | 12days (82 mm) Wet | 10h Excellent | 72% Muggy | 4.9 Moderate | Fair | View Details |
| May | 17°C / 8°C | 17°C / 7°C | 16days (126 mm) Wet | 10.3h Excellent | 75% Muggy | 5.6 High | Good | View Details |
| June best | 23°C / 14°C | 24°C / 14°C | 14days (120 mm) Wet | 11.8h Excellent | 73% Muggy | 6.6 High | Excellent | View Details |
| July best | 24°C / 15°C | 25°C / 16°C | 14days (90 mm) Wet | 11.9h Excellent | 71% Muggy | 6.4 High | Excellent | View Details |
| August best | 24°C / 15°C | 25°C / 16°C | 11days (116 mm) Wet | 10.6h Excellent | 73% Muggy | 5.5 High | Excellent | View Details |
| September best | 20°C / 12°C | 20°C / 11°C | 11days (88 mm) Wet | 9.1h Good | 78% Humid | 4.3 Moderate | Excellent | View Details |
| October | 15°C / 8°C | 14°C / 6°C | 12days (80 mm) Wet | 7h Good | 82% Humid | 2.8 Moderate | Fair | View Details |
| November | 9°C / 2°C | 7°C / 0°C | 13days (83 mm) Wet | 5.4h Fair | 86% Very Muggy | 1.7 Low | Poor | View Details |
| December | 6°C / 0°C | 3°C / -4°C | 13days (93 mm) Wet | 4.7h Fair | 86% Very Muggy | 1.2 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Winterthur are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Winterthur, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Winterthur is August, with average daytime highs of 24°C (76°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Winterthur is January, with average overnight lows of -2°C (29°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Winterthur is May, averaging 126mm of precipitation across 16 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Winterthur runs through May, January, June, July, with the heaviest rainfall in May. Based on 10-year averages for Winterthur.
Winterthur receives approximately 101 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Winterthur.
The least favorable months to visit Winterthur are January, February, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Winterthur is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Winterthur is 78%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Winterthur receives snow. Months with snowfall average 6 snow days and 12 cm (5 in) of accumulation, with about 13 frost days during winter.
Average wind speeds in Winterthur are 12 km/h (7 mph). The windiest month is February with peak winds reaching 13 km/h (8 mph) (gusts up to 34 km/h / 21 mph).
Winterthur averages 3 clear-sky days per month with overall cloud cover around 63%. The clearest skies occur in March.
The annual average dew point in Winterthur is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Winterthur has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Winterthur ranges from 5°C (41°F) to 13°C (55°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Winterthur. It earns a climate score of 8.4/10 with Excellent.
For June in Winterthur, pack Umbrella, Waterproof jacket, Waterproof shoes, Sunscreen (SPF 30+), Sunglasses. With average highs of 23°C (73°F) and 14 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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