Today
Sun, Jun 21
Slight rain showers
35°15°
- Rain chance
- 5%
- Precip
- 0.2 mm
- Max wind
- 9 km/h
Grenchen weather forecast
Solothurn, Switzerland · Zurich time · 47.19°, 7.40°
Extreme heat Friday: feels-like temperatures up to 40 °C.
Extreme heat Friday: feels-like temperatures up to 40 °C.
Derived advisory — not an official warning
Current conditions · 2:45 PM local
Current conditions in Grenchen
34°C
Partly cloudy
Feels like 22°C
- Humidity
- 63%
- Wind
- 9 km/h SSW
- Gusts
- 15 km/h
- UV index
- 0
- Visibility
- 41.4 km
Right now
Grenchen is currently seeing partly cloudy, with 34 °C on the thermometer. It feels warmer than it reads, more like 37 °C. Wind is from the SSW at 9 km/h. Humidity stands at 34% with sea-level pressure near 1023 hPa.
At a glance
Today
35° / 15°Slight rain showers
Tomorrow
37° / 17°Partly cloudy
Upcoming · to Saturday
36° / 18°A steady stretch: highs near 36°, lows around 18°, and no day above a 16% rain chance through Saturday.
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Next 3 days
Expect slight rain showers today, between 15 °C and 35 °C. Tomorrow brings partly cloudy with a high of 36 °C and a low of 17 °C. Tuesday brings overcast with a high of 34 °C and a low of 18 °C.
Tomorrow
Mon, Jun 22
Partly cloudy
37°17°
- Rain chance
- 3%
- Precip
- 0 mm
- Max wind
- 13 km/h
Tuesday
Tue, Jun 23
Overcast
35°18°
- Rain chance
- 0%
- Precip
- 0 mm
- Max wind
- 13 km/h
Next 48 hours
- 12 AM21°0%3 km/h
- 1 AM21°0%2 km/h
- 2 AM19°0%0 km/h
- 3 AM18°0%0 km/h
- 4 AM17°0%2 km/h
- 5 AM15°0%2 km/h
- 6 AM15°0%1 km/h
- 7 AM15°0%1 km/h
- 8 AM18°0%2 km/h
- 9 AM20°0%2 km/h
- 10 AM24°0%2 km/h
- 11 AM28°0%6 km/h
- 12 PM30°0%7 km/h
- 1 PM32°0%6 km/h
- 2 PM33°0%8 km/h
- 3 PM34°3%9 km/h
- 4 PM35°3%8 km/h
- 5 PM35°5%6 km/h
- 6 PM34°3%8 km/h
- 7 PM31°0%6 km/h
- 8 PM30°0%8 km/h
- 9 PM28°0%6 km/h
- 10 PM24°0%5 km/h
- 11 PM23°0%6 km/h
- 12 AM23°0%4 km/h
- 1 AM22°0%4 km/h
- 2 AM20°0%4 km/h
- 3 AM20°0%2 km/h
- 4 AM18°0%3 km/h
- 5 AM17°0%3 km/h
- 6 AM18°0%1 km/h
- 7 AM18°0%1 km/h
- 8 AM20°0%1 km/h
- 9 AM23°0%3 km/h
- 10 AM26°0%1 km/h
- 11 AM29°0%2 km/h
- 12 PM31°0%3 km/h
- 1 PM33°0%6 km/h
- 2 PM35°0%9 km/h
- 3 PM35°0%9 km/h
- 4 PM37°0%4 km/h
- 5 PM36°0%4 km/h
- 6 PM36°3%9 km/h
- 7 PM34°3%13 km/h
- 8 PM32°3%9 km/h
- 9 PM29°0%9 km/h
- 10 PM26°0%5 km/h
- 11 PM25°0%5 km/h
In depth
The weather picture for Grenchen opens with partly cloudy; it's 34 °C out, feeling like 37 °C. Today's forecast calls for slight rain showers, topping out near 35 °C before falling back to 15 °C overnight. Winds blow mainly from the SSW around 9 km/h, with gusts up to 18 km/h. Daytime highs hold fairly steady this week, staying within 34 to 36 °C. Rain is in the picture on Saturday, with roughly 3 mm expected in total across the week. Tomorrow brings partly cloudy with a high of 36 °C and a 3% chance of precipitation. The UV index reaches 7 today, so sun protection is sensible during the middle of the day. Sunrise comes at 05:34 and sunset at 21:29, giving 15.9 hours of daylight. Current humidity sits at 34% with pressure near 1023 hPa. Looking further out, Thursday shows slight rain showers with a high around 36 °C, while Saturday ends the week at 35 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.
Air quality
38
Good
US AQI · European AQI 37
Air quality in Grenchen is currently good, with a US AQI of 38 (European AQI 37). The dominant pollutant right now is ozone. Air quality is healthy; no precautions needed. Fine particulate matter (PM2.5) measures 9.2 µg/m³. Pollen in the air today: grass (moderate) — allergy sufferers take note.
Pollutants
- PM2.5
- 9.2 µg/m³
- PM10
- 20.4 µg/m³
- Ozone (O₃)
- 93 µg/m³
- NO₂
- 0.6 µg/m³
- SO₂
- 0.2 µg/m³
- CO
- 109 µg/m³
- Dust
- 11 µg/m³
Pollen
- Grass
- 48.3 gr/m³
- Birch
- 0.2 gr/m³
- Alder
- 0 gr/m³
- Olive
- 0.2 gr/m³
- Mugwort
- 0 gr/m³
- Ragweed
- 0 gr/m³
Sun & UV
- Sunrise
- 5:34 AM
- Sunset
- 9:29 PM
- Daylight
- 15h 55m
- Max UV
- 7.1 High
Wind
- Wind
- 9 km/h
- Gusts
- 15 km/h
- Direction
- SSW (195°)
Farming weather
Soil temperatures today read surface 20.6 °C, 6 cm 23.7 °C, 18 cm 21.3 °C, 54 cm 16.2 °C. Soil moisture sits at 0-1 cm at 0.1 m³/m³, 3-9 cm at 0.19 m³/m³, 27-81 cm at 0.24 m³/m³. For wheat, the root-zone reading is below the ideal 0.2-0.35 m³/m³ band. Reference evapotranspiration totals 44 mm against only 3 mm of expected rain — a 41 mm deficit, so irrigation will be needed this week. A suitable spraying window opens around 06:00 on 2026-06-21, with winds at or below 15 km/h and no rain expected. Heat stress is likely for wheat with highs reaching 36 °C (threshold 32 °C). Heat stress is likely for maize with highs reaching 36 °C (threshold 35 °C). Projected growing degree days over the next week: wheat 164, maize 125.
- Topsoil moisture
- 0.131 m³/m³
- Soil temp
- 16°C
- ET₀ today
- 5.94 mm
- Spray window
- ~5:00
- Rain (next 7d)
- 2.6 mm
- Wind
- 9 km/h
- Humidity
- 63%
Advisory summary
Weather alerts for Grenchen (derived from forecast data, not official warnings): Extreme heat Friday: feels-like temperatures up to 40 °C.
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All data for Grenchen
| Variable | Value |
|---|---|
| City | Grenchen, Solothurn, Switzerland |
| Coordinates | 47.1921, 7.39586 |
| Elevation | 454 m |
| Timezone | Europe/Zurich |
| Population | 15,927 |
| Observed at (local) | 2:45 PM |
| Temperature (2 m) | 34°C |
| Apparent temperature | 22°C |
| Relative humidity (2 m) | 63% |
| Dew point (2 m) | 14°C |
| Precipitation (last hour) | 0 mm |
| Rain | 0 mm |
| Showers | 0 mm |
| Snowfall | 0 cm |
| Weather code (WMO) | 2 |
| Cloud cover | 28% |
| Surface pressure | 973 hPa |
| Sea-level pressure | 1023 hPa |
| Wind speed (10 m) | 9 km/h |
| Wind gusts (10 m) | 15 km/h |
| Wind direction (10 m) | 195° (SSW) |
| Visibility | 41.4 km |
| UV index | 0 |
| Day / night | Day |
| Today max / min | 35°C / 15°C |
| Today feels-like max / min | 37°C / 16°C |
| Today precipitation sum | 0.2 mm |
| Today rain sum | 0.2 mm |
| Today snowfall sum | 0 cm |
| Today max precip probability | 5% |
| Today max wind / gusts | 9 km/h / 18 km/h |
| Dominant wind direction | 193° (SSW) |
| Sunrise / sunset | 5:34 AM / 9:29 PM |
| Daylight duration | 15h 55m |
| Sunshine duration | 13h 25m |
| Max UV index | 7.1 |
| Reference evapotranspiration (ET₀) | 5.94 mm |
| Topsoil moisture (0–1 cm) | 0.131 m³/m³ |
| Surface soil temperature | 16°C |
| US AQI | 38 |
| European AQI | 37 |
| PM2.5 | 9.2 µg/m³ |
| PM10 | 20.4 µg/m³ |
| Ozone (O₃) | 93 µg/m³ |
| Nitrogen dioxide (NO₂) | 0.6 µg/m³ |
| Sulphur dioxide (SO₂) | 0.2 µg/m³ |
| Carbon monoxide (CO) | 109 µg/m³ |
| Dust | 11 µg/m³ |
| Alder pollen | 0 gr/m³ |
| Birch pollen | 0.2 gr/m³ |
| Grass pollen | 48.3 gr/m³ |
| Mugwort pollen | 0 gr/m³ |
| Olive pollen | 0.2 gr/m³ |
| Ragweed pollen | 0 gr/m³ |
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<iframe src="https://weathertomorrow.cloud/embed/city/ch/solothurn/grenchen" width="320" height="180" frameborder="0" title="Grenchen weather" loading="lazy"></iframe>Frequently asked questions
Will it rain in Grenchen tomorrow?
Rain is unlikely in Grenchen tomorrow; the precipitation chance stays around 3%.
What is the temperature in Grenchen today?
Today Grenchen sees slight rain showers with a high of 35 °C and a low of 15 °C.
How hot will it be in Grenchen tomorrow?
Tomorrow's high in Grenchen is forecast at 36 °C with partly cloudy.
Is it windy in Grenchen today?
No, not especially; gusts only reach up to 18 km/h today.
What is the UV index in Grenchen today?
The UV index peaks at 7 today, which is high.
What time is sunrise and sunset in Grenchen today?
The sun rises at 05:34 and sets at 21:29 local time.
Is the air quality in Grenchen good today?
Air quality is good right now, with a US AQI reading of 38.