Trun, Switzerland experiences average highs of 13°C (55°F) and lows of 5°C (41°F) throughout the year. Rainfall is frequent, averaging about 16 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 1.0°C (1.8°F) across the available records.
Trun, Switzerland Weather & Climate 2026
Monthly climate averages for Trun, Switzerland. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Sep At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.6/10
Best: June, July, August, September, October
UV Index
4
Low
Temperature 13°C / 5°C
Feels Like 13°C / 4°C
Rainy Days 16
Rainfall 149 mm
Sunshine 9 h
Humidity 81%
Wind Speed 7 km/h
Dew Point 6°C
Snow Days 12 days
Frost Days 15 days
Hottest Month
24°C
August
Avg Low15°C
Rain18days
Coldest Month
-4°C
January
Avg High3°C
Rain15days
Driest Month
12days
February
Avg High6°C
Avg Low-1°C
Windiest Month
7 km/h
April (Gusts 41)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:31
Daylight 15.8h
Sunset 21:21
Live conditions—
Trun on the map · live conditions
Trun, Switzerland
- Continent
- Europe
- Country
- Switzerland
- City
- Trun
- Population
- 1.2K
- Coordinates
- 46.74°, 8.99°
Seasonal Breakdown
Spring
Mar–May
Avg High 12°C
Avg Low 4°C
Rain 17 days/mo
Summer
Jun–Aug
Avg High 23°C
Avg Low 14°C
Rain 20 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 6°C
Rain 15 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 5°C
Avg Low -2°C
Rain 14 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: 3°C / -4°C . Feb: 6°C / -1°C . Mar: 8°C / 1°C . Apr: 11°C / 4°C . May: 15°C / 7°C . Jun: 22°C / 13°C . Jul: 24°C / 15°C . Aug: 24°C / 15°C . Sep: 20°C / 11°C . Oct: 16°C / 8°C . Nov: 8°C / 1°C . Dec: 4°C / -2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 118 mm. Feb: 83 mm. Mar: 112 mm. Apr: 116 mm. May: 159 mm. Jun: 204 mm. Jul: 221 mm. Aug: 228 mm. Sep: 158 mm. Oct: 151 mm. Nov: 116 mm. Dec: 122 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 78%. Feb: 78%. Mar: 79%. Apr: 80%. May: 84%. Jun: 82%. Jul: 82%. Aug: 82%. Sep: 85%. Oct: 84%. Nov: 83%. Dec: 78%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 7 km/h . Feb: 7 km/h . Mar: 7 km/h . Apr: 7 km/h . May: 7 km/h . Jun: 7 km/h . Jul: 6 km/h . Aug: 6 km/h . Sep: 6 km/h . Oct: 7 km/h . Nov: 7 km/h . Dec: 7 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 7h. Mar: 9h. Apr: 10h. May: 10h. Jun: 11h. Jul: 12h. Aug: 10h. Sep: 9h. Oct: 7h. Nov: 6h. Dec: 5h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 6. May: UV 6. Jun: UV 6. Jul: UV 6. Aug: UV 6. Sep: UV 4. Oct: UV 3. Nov: UV 2. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 19 days. Feb: 17 days. Mar: 18 days. Apr: 15 days. May: 12 days. Jun: 1 days. Jul: 0 days. Aug: 1 days. Sep: 4 days. Oct: 8 days. Nov: 17 days. Dec: 18 days.
Climate Trends
Average highs have warmed by 1.0°C (1.8°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 · -3°C | Jan · -4°C |
| Wettest month | Jul 2025 · 302 mm | Aug · 228 mm |
| Windiest month | Jan 2025 · 8 km/h | Apr · 7 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May
Wet June best
Wet July best
Wet August best
Excellent September best
Good October best
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 3°C / -4°C | 0°C / -7°C | 15days (118 mm) Wet | 5.8h Fair | 78% Humid | 2.1 Moderate | Poor | View Details |
| February | 6°C / -1°C | 4°C / -4°C | 12days (83 mm) Wet | 7.1h Good | 78% Humid | 3 Moderate | Poor | View Details |
| March | 8°C / 1°C | 6°C / -2°C | 15days (112 mm) Wet | 8.7h Good | 79% Humid | 4.3 Moderate | Poor | View Details |
| April | 11°C / 4°C | 11°C / 1°C | 15days (116 mm) Wet | 10.4h Excellent | 80% Humid | 5.8 High | Fair | View Details |
| May | 15°C / 7°C | 15°C / 6°C | 21days (159 mm) Wet | 10.2h Excellent | 84% Humid | 5.6 High | Wet | View Details |
| June best | 22°C / 13°C | 24°C / 13°C | 20days (204 mm) Wet | 11.2h Excellent | 82% Humid | 6.4 High | Wet | View Details |
| July best | 24°C / 15°C | 26°C / 16°C | 21days (221 mm) Wet | 11.5h Excellent | 82% Humid | 6.4 High | Wet | View Details |
| August best | 24°C / 15°C | 26°C / 15°C | 18days (228 mm) Wet | 10.4h Excellent | 82% Humid | 5.9 High | Excellent | View Details |
| September best | 20°C / 11°C | 21°C / 11°C | 16days (158 mm) Wet | 8.9h Good | 85% Humid | 4.4 Moderate | Good | View Details |
| October best | 16°C / 8°C | 15°C / 6°C | 14days (151 mm) Wet | 7.2h Good | 84% Humid | 3.1 Moderate | Fair | View Details |
| November | 8°C / 1°C | 6°C / -2°C | 14days (116 mm) Wet | 5.9h Fair | 83% Humid | 2.1 Moderate | Poor | View Details |
| December | 4°C / -2°C | 2°C / -6°C | 14days (122 mm) Wet | 5.1h Fair | 78% Humid | 1.7 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Trun are June, July, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Trun, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Trun is August, with average daytime highs of 24°C (75°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Trun is January, with average overnight lows of -4°C (25°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Trun is August, averaging 228mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Trun runs through May, July, June, August, with the heaviest rainfall in May. Based on 10-year averages for Trun.
Trun receives approximately 102 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Trun.
The least favorable months to visit Trun are January, February, March, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider June, July, August, September, October instead.
The annual average UV index in Trun is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Trun is 81%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes, Trun receives snow. Months with snowfall average 12 snow days and 47 cm (19 in) of accumulation, with about 15 frost days during winter.
Average wind speeds in Trun are 7 km/h (4 mph). The windiest month is April with peak winds reaching 7 km/h (4 mph) (gusts up to 41 km/h / 25 mph).
Trun averages 2 clear-sky days per month with overall cloud cover around 68%. The clearest skies occur in December.
The annual average dew point in Trun is 6°C (43°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Trun 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 Trun ranges from 4°C (39°F) to 13°C (55°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
June is not the best time to visit Trun, with a climate score of 7.4/10. Consider visiting during June, July, August, September, October instead for better conditions.
For June in Trun, pack Umbrella, Waterproof jacket, Waterproof shoes, Sunscreen (SPF 30+), Sunglasses. With average highs of 22°C (72°F) and 20 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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