Haslen, Switzerland experiences average highs of 13°C (55°F) and lows of 4°C (39°F) throughout the year. Rainfall is frequent, averaging about 17 rainy days per month. Average highs have warmed by 1.0°C (1.8°F) across the available records.
Haslen, Switzerland Weather & Climate 2026
Monthly climate averages for Haslen, Switzerland. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Apr–Sep At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4/10
Best: June, July, August, September, October
UV Index
4
Low
Temperature 13°C / 4°C
Feels Like 12°C / 2°C
Rainy Days 17
Rainfall 172 mm
Sunshine 8 h
Humidity 79%
Wind Speed 8 km/h
Dew Point 5°C
Snow Days 9 days
Frost Days 17 days
Hottest Month
22°C
August
Avg Low13°C
Rain19days
Coldest Month
-5°C
January
Avg High3°C
Rain15days
Driest Month
13days
February
Avg High6°C
Avg Low-3°C
Windiest Month
9 km/h
March (Gusts 37)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:27
Daylight 15.9h
Sunset 21:22
Live conditions—
Haslen on the map · live conditions
Haslen, Switzerland
- Continent
- Europe
- Country
- Switzerland
- City
- Haslen
- Population
- 638
- Coordinates
- 47.37°, 9.37°
Seasonal Breakdown
Spring
Mar–May
Avg High 12°C
Avg Low 3°C
Rain 17 days/mo
Summer
Jun–Aug
Avg High 21°C
Avg Low 13°C
Rain 20 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 13°C
Avg Low 5°C
Rain 15 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 4°C
Avg Low -4°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 / -5°C . Feb: 6°C / -3°C . Mar: 9°C / -1°C . Apr: 12°C / 2°C . May: 16°C / 7°C . Jun: 21°C / 12°C . Jul: 22°C / 13°C . Aug: 22°C / 13°C . Sep: 18°C / 10°C . Oct: 14°C / 6°C . Nov: 8°C / 1°C . Dec: 4°C / -3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 146 mm. Feb: 100 mm. Mar: 120 mm. Apr: 140 mm. May: 218 mm. Jun: 236 mm. Jul: 270 mm. Aug: 263 mm. Sep: 174 mm. Oct: 135 mm. Nov: 119 mm. Dec: 137 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 81%. Feb: 79%. Mar: 76%. Apr: 74%. May: 77%. Jun: 77%. Jul: 77%. Aug: 79%. Sep: 82%. Oct: 83%. Nov: 84%. Dec: 83%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 9 km/h . Feb: 9 km/h . Mar: 9 km/h . Apr: 9 km/h . May: 9 km/h . Jun: 9 km/h . Jul: 8 km/h . Aug: 8 km/h . Sep: 8 km/h . Oct: 8 km/h . Nov: 8 km/h . Dec: 8 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 9h. Apr: 10h. May: 10h. Jun: 12h. Jul: 11h. 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 2. Mar: UV 3. 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: 17 days. Feb: 13 days. Mar: 13 days. Apr: 9 days. May: 3 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 1 days. Oct: 3 days. Nov: 11 days. Dec: 15 days.
Climate Trends
Average highs have warmed by 1.0°C (1.8°F) across the available records. Average rainfall is trending drier by about 23 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jun 2025 · 23°C | Aug · 22°C |
| Coldest month | Jan 2025 · -5°C | Jan · -5°C |
| Wettest month | Jul 2025 · 369 mm | Jul · 270 mm |
| Windiest month | Jan 2025 · 9 km/h | Mar · 9 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
Wet September best
Fair October best
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 3°C / -5°C | 0°C / -8°C | 15days (146 mm) Wet | 5.4h Fair | 81% Humid | 1.6 Low | Poor | View Details |
| February | 6°C / -3°C | 3°C / -7°C | 13days (100 mm) Wet | 6.7h Fair | 79% Humid | 2.3 Moderate | Poor | View Details |
| March | 9°C / -1°C | 6°C / -4°C | 15days (120 mm) Wet | 8.5h Good | 76% Humid | 3.3 Moderate | Poor | View Details |
| April | 12°C / 2°C | 11°C / 0°C | 16days (140 mm) Wet | 10.1h Excellent | 74% Muggy | 4.7 Moderate | Fair | View Details |
| May | 16°C / 7°C | 15°C / 5°C | 21days (218 mm) Wet | 10.1h Excellent | 77% Humid | 5.6 High | Wet | View Details |
| June best | 21°C / 12°C | 22°C / 11°C | 20days (236 mm) Wet | 11.5h Excellent | 77% Humid | 6.5 High | Wet | View Details |
| July best | 22°C / 13°C | 23°C / 13°C | 22days (270 mm) Wet | 11.4h Excellent | 77% Humid | 6.2 High | Wet | View Details |
| August best | 22°C / 13°C | 23°C / 13°C | 19days (263 mm) Wet | 10.4h Excellent | 79% Humid | 5.6 High | Wet | View Details |
| September best | 18°C / 10°C | 18°C / 9°C | 16days (174 mm) Wet | 8.9h Good | 82% Humid | 4.1 Moderate | Fair | View Details |
| October best | 14°C / 6°C | 13°C / 4°C | 14days (135 mm) Wet | 7.2h Good | 83% Humid | 2.8 Moderate | Fair | View Details |
| November | 8°C / 1°C | 6°C / -2°C | 14days (119 mm) Wet | 5.6h Fair | 84% Humid | 1.7 Low | Poor | View Details |
| December | 4°C / -3°C | 1°C / -7°C | 15days (137 mm) Wet | 4.8h Fair | 83% Humid | 1.3 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Haslen 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 Haslen, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Haslen is August, with average daytime highs of 22°C (71°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Haslen is January, with average overnight lows of -5°C (24°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Haslen is July, averaging 270mm of precipitation across 22 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Haslen runs through July, May, June, August, with the heaviest rainfall in July. Based on 10-year averages for Haslen.
Haslen receives approximately 101 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Haslen.
The least favorable months to visit Haslen 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 Haslen is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Haslen is 79%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Haslen receives snow. Months with snowfall average 9 snow days and 32 cm (13 in) of accumulation, with about 17 frost days during winter.
Average wind speeds in Haslen are 8 km/h (5 mph). The windiest month is March with peak winds reaching 9 km/h (6 mph) (gusts up to 37 km/h / 23 mph).
Haslen averages 3 clear-sky days per month with overall cloud cover around 66%. The clearest skies occur in March.
The annual average dew point in Haslen is 5°C (41°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Haslen 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 Haslen ranges from 2°C (36°F) to 12°C (54°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 Haslen, with a climate score of 6.5/10. Consider visiting during June, July, August, September, October instead for better conditions.
For June in Haslen, pack Warm evening layer, Umbrella, Waterproof jacket, Waterproof shoes, Sunscreen (SPF 30+). With average highs of 21°C (70°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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