Jongny, Switzerland experiences average highs of 15°C (59°F) and lows of 7°C (45°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 1.6°C (2.9°F) across the available records.
Jongny, Switzerland Weather & Climate 2026
Monthly climate averages for Jongny, 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 / 7°C
Feels Like 14°C / 5°C
Rainy Days 13
Rainfall 109 mm
Sunshine 9 h
Humidity 78%
Wind Speed 9 km/h
Dew Point 7°C
Snow Days 6 days
Frost Days 10 days
Hottest Month
24°C
August
Avg Low15°C
Rain10days
Coldest Month
0°C
January
Avg High5°C
Rain15days
Driest Month
10days
August
Avg High24°C
Avg Low15°C
Windiest Month
10 km/h
April (Gusts 30)
Worst Time to Visit
Consider avoiding January, February, November, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:41
Daylight 15.8h
Sunset 21:28
Live conditions—
Jongny on the map · live conditions
Jongny, Switzerland
- Continent
- Europe
- Country
- Switzerland
- City
- Jongny
- Population
- 1.4K
- Elevation
- 639 m
- Coordinates
- 46.48°, 6.84°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 4°C
Rain 13 days/mo
Summer
Jun–Aug
Avg High 23°C
Avg Low 14°C
Rain 12 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 8°C
Rain 13 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 6°C
Avg Low 0°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 / 0°C . Feb: 8°C / 0°C . Mar: 10°C / 1°C . Apr: 14°C / 4°C . May: 17°C / 8°C . Jun: 22°C / 13°C . Jul: 24°C / 15°C . Aug: 24°C / 15°C . Sep: 19°C / 12°C . Oct: 16°C / 8°C . Nov: 10°C / 3°C . Dec: 6°C / 1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 136 mm. Feb: 84 mm. Mar: 94 mm. Apr: 89 mm. May: 134 mm. Jun: 93 mm. Jul: 112 mm. Aug: 93 mm. Sep: 107 mm. Oct: 100 mm. Nov: 127 mm. Dec: 140 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 83%. Feb: 80%. Mar: 76%. Apr: 73%. May: 76%. Jun: 75%. Jul: 73%. Aug: 75%. Sep: 79%. Oct: 82%. Nov: 84%. Dec: 85%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 10 km/h . Feb: 10 km/h . Mar: 10 km/h . Apr: 10 km/h . May: 10 km/h . Jun: 9 km/h . Jul: 9 km/h . Aug: 9 km/h . Sep: 9 km/h . Oct: 9 km/h . Nov: 9 km/h . Dec: 9 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 9h. Apr: 10h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 7h. Nov: 6h. 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 7. Aug: UV 6. Sep: UV 5. 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: 7 days. Mar: 6 days. Apr: 4 days. May: 1 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 5 days. Dec: 9 days.
Climate Trends
Average highs have warmed by 1.6°C (2.9°F) across the available records. Average rainfall is trending drier by about 16 mm.
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 | Feb 2025 · -1°C | Jan · 0°C |
| Wettest month | Sep 2025 · 192 mm | Dec · 140 mm |
| Windiest month | Jan 2025 · 11 km/h | Apr · 10 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
Good October
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / 0°C | 2°C / -4°C | 15days (136 mm) Wet | 5.3h Fair | 83% Humid | 1.6 Low | Poor | View Details |
| February | 8°C / 0°C | 5°C / -3°C | 11days (84 mm) Wet | 6.7h Fair | 80% Humid | 2.4 Moderate | Poor | View Details |
| March | 10°C / 1°C | 8°C / -2°C | 13days (94 mm) Wet | 8.5h Good | 76% Humid | 3.9 Moderate | Poor | View Details |
| April | 14°C / 4°C | 12°C / 1°C | 12days (89 mm) Wet | 10.4h Excellent | 73% Muggy | 5.2 High | Fair | View Details |
| May | 17°C / 8°C | 17°C / 6°C | 15days (134 mm) Wet | 10.4h Excellent | 76% Humid | 5.8 High | Good | View Details |
| June best | 22°C / 13°C | 23°C / 13°C | 13days (93 mm) Wet | 11.7h Excellent | 75% Muggy | 6.8 High | Excellent | View Details |
| July best | 24°C / 15°C | 25°C / 16°C | 13days (112 mm) Wet | 12.1h Excellent | 73% Muggy | 6.9 High | Excellent | View Details |
| August best | 24°C / 15°C | 25°C / 16°C | 10days (93 mm) Wet | 11h Excellent | 75% Muggy | 6.2 High | Excellent | View Details |
| September best | 19°C / 12°C | 20°C / 12°C | 12days (107 mm) Wet | 8.9h Good | 79% Humid | 4.5 Moderate | Good | View Details |
| October | 16°C / 8°C | 15°C / 6°C | 12days (100 mm) Wet | 7.3h Good | 82% Humid | 3 Moderate | Good | View Details |
| November | 10°C / 3°C | 8°C / 1°C | 14days (127 mm) Wet | 5.7h Fair | 84% Humid | 1.8 Low | Poor | View Details |
| December | 6°C / 1°C | 4°C / -3°C | 14days (140 mm) Wet | 4.9h Fair | 85% Humid | 1.4 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Jongny are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Jongny, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Jongny 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 Jongny is January, with average overnight lows of 0°C (31°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Jongny is December, averaging 140mm of precipitation across 14 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Jongny runs through January, May, November, December, with the heaviest rainfall in January. Based on 10-year averages for Jongny.
Jongny receives approximately 103 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Jongny.
The least favorable months to visit Jongny are January, February, November, 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 Jongny is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Jongny is 78%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Jongny receives snow. Months with snowfall average 6 snow days and 14 cm (6 in) of accumulation, with about 10 frost days during winter.
Average wind speeds in Jongny are 9 km/h (6 mph). The windiest month is April with peak winds reaching 10 km/h (6 mph) (gusts up to 30 km/h / 19 mph).
Jongny averages 3 clear-sky days per month with overall cloud cover around 63%. The clearest skies occur in April.
The annual average dew point in Jongny is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Jongny 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 Jongny ranges from 5°C (41°F) to 14°C (57°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 Jongny. It earns a climate score of 8.4/10 with Excellent.
For June in Jongny, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 22°C (72°F) and 13 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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