Best time to visit Solothurn
Month-by-month weather averages for Solothurn.
Solothurn, Solothurn, Switzerland
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 3.8 °C / 39 °F | -1.5 °C / 29 °F | 92 mm / 3.6 in | neither best nor good |
| February | 5.9 °C / 43 °F | -1.1 °C / 30 °F | 72 mm / 2.8 in | neither best nor good |
| March | 10.1 °C / 50 °F | 1.4 °C / 35 °F | 89 mm / 3.5 in | neither best nor good |
| April | 14.7 °C / 58 °F | 4.9 °C / 41 °F | 99 mm / 3.9 in | neither best nor good |
| May | 17.8 °C / 64 °F | 8.8 °C / 48 °F | 152 mm / 6 in | good month |
| June | 22.3 °C / 72 °F | 12.8 °C / 55 °F | 139 mm / 5.5 in | good month |
| July | 24.2 °C / 76 °F | 14.2 °C / 58 °F | 144 mm / 5.7 in | good month |
| August | 23.4 °C / 74 °F | 13.6 °C / 56 °F | 148 mm / 5.8 in | good month |
| September | 19.3 °C / 67 °F | 10.2 °C / 50 °F | 105 mm / 4.1 in | good month |
| October | 14.4 °C / 58 °F | 6.6 °C / 44 °F | 96 mm / 3.8 in | neither best nor good |
| November | 8.1 °C / 47 °F | 2.2 °C / 36 °F | 97 mm / 3.8 in | neither best nor good |
| December | 4.4 °C / 40 °F | -0.6 °C / 31 °F | 106 mm / 4.2 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: good
- JJune: good
- JJuly: good
- AAugust: good
- SSeptember: good
- OOctober: neither
- NNovember: neither
- DDecember: neither
- Good
- May–September
Why these months
May · good
In its favour: feels like (high) 16.8 °C / 62 °F, share of daylight that is sunny 69%, average daily high 17.8 °C / 64 °F, average daily low 8.8 °C / 48 °F, relative humidity 74%.
Against: wet days 18.9 days, precipitation 152 mm / 6 in, days with heavy rain 4.9 days.
June · good
In its favour: feels like (high) 22.7 °C / 73 °F, average daily high 22.3 °C / 72 °F, share of daylight that is sunny 72%, average daily low 12.8 °C / 55 °F, relative humidity 74%.
Against: wet days 17.5 days, precipitation 139 mm / 5.5 in, days with heavy rain 4.8 days.
July · good
In its favour: feels like (high) 24.8 °C / 77 °F, average daily high 24.2 °C / 76 °F, share of daylight that is sunny 79%, average daily low 14.2 °C / 58 °F, relative humidity 71%.
Against: wet days 16.9 days, precipitation 144 mm / 5.7 in, days with heavy rain 4.9 days.
August · good
In its favour: feels like (high) 24 °C / 75 °F, average daily high 23.4 °C / 74 °F, share of daylight that is sunny 76%, average daily low 13.6 °C / 56 °F, relative humidity 75%.
Against: precipitation 148 mm / 5.8 in, wet days 16 days, days with heavy rain 5.6 days.
September · good
In its favour: feels like (high) 18.8 °C / 66 °F, average daily high 19.3 °C / 67 °F, share of daylight that is sunny 73%, precipitation 105 mm / 4.1 in, days with heavy rain 3.1 days, average daily low 10.2 °C / 50 °F.
Against: wet days 13.2 days, relative humidity 80%.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: good
- AApril: best
- MMay: neither
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: best
- OOctober: best
- NNovember: neither
- DDecember: neither
- Best
- April, September–October
- Good
- March
Why these months
March · good
In its favour: average daily high 10.1 °C / 50 °F, precipitation 89 mm / 3.5 in, days with heavy rain 2.1 days, share of daylight that is sunny 70%, daylight per day 11.9 h, average daily low 1.4 °C / 35 °F, wind (daily max) 13 km/h / 8 mph, feels like (high) 6.9 °C / 44 °F.
Against: wet days 13.9 days.
April · best
In its favour: average daily high 14.7 °C / 58 °F, precipitation 99 mm / 3.9 in, feels like (high) 12.6 °C / 55 °F, average daily low 4.9 °C / 41 °F, share of daylight that is sunny 75%, daylight per day 13.6 h, days with heavy rain 3.3 days, wind (daily max) 12 km/h / 7 mph.
Against: wet days 14 days.
September · best
In its favour: average daily high 19.3 °C / 67 °F, precipitation 105 mm / 4.1 in, feels like (high) 18.8 °C / 66 °F, average daily low 10.2 °C / 50 °F, share of daylight that is sunny 73%, daylight per day 12.6 h, days with heavy rain 3.1 days, wind (daily max) 10 km/h / 6 mph.
Against: wet days 13.2 days.
October · best
In its favour: average daily high 14.4 °C / 58 °F, precipitation 96 mm / 3.8 in, feels like (high) 13 °C / 55 °F, average daily low 6.6 °C / 44 °F, share of daylight that is sunny 67%, days with heavy rain 3.2 days, daylight per day 10.9 h, wet days 12.6 days, wind (daily max) 10 km/h / 6 mph.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Bugnenets-Savagnières, 40 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 0.5 °C | 2.5 °C | 6.9 °C | 12.6 °C | 16.8 °C | 22.7 °C | 24.8 °C | 24 °C | 18.8 °C | 13 °C | 5.7 °C | 1.5 °C |
| Days with heavy rain | 3 days | 2 days | 2.1 days | 3.3 days | 4.9 days | 4.8 days | 4.9 days | 5.6 days | 3.1 days | 3.2 days | 2.9 days | 3.5 days |
| Time rain usually falls | 11 pm | 11 am | 5 pm | 6 pm | 6 pm | 9 pm | 7 pm | 6 pm | 9 pm | 9 am | 9 am | 5 pm |
| Sunshine per day | 5.2 h | 6.7 h | 8.4 h | 10.2 h | 10.4 h | 11.5 h | 12.2 h | 10.8 h | 9.2 h | 7.3 h | 5.6 h | 4.7 h |
| Relative humidity | 85% | 81% | 74% | 71% | 74% | 74% | 71% | 75% | 80% | 85% | 87% | 88% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 9.4 µg/m³ | 13.3 µg/m³ | 12.9 µg/m³ | 10.8 µg/m³ | 11.4 µg/m³ | 13.3 µg/m³ | 11.6 µg/m³ | 11 µg/m³ | 9.4 µg/m³ | 11.2 µg/m³ | 11.6 µg/m³ | 13.2 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 17.5 µg/m³ | 23 µg/m³ | 21.1 µg/m³ | 17.6 µg/m³ | 17.9 µg/m³ | 19.8 µg/m³ | 18.8 µg/m³ | 16.6 µg/m³ | 14.8 µg/m³ | 17.6 µg/m³ | 21 µg/m³ | 24.6 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.