Switzerland · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Basel are June, August and September, when daytime temperatures are agreeable and rainfall is relatively low.
Basel sees its warmest weather in July, when daytime highs average around 26°C, and its coolest in January (around 5°C).
Annual precipitation totals roughly 842mm — May is typically the wettest month (~98mm) and February the driest (~45mm).
Rainfall is spread fairly evenly through the year, so no single season is dramatically wetter than the rest.
July is the sunniest month, with about 235 hours of sunshine.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 61 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 5° / 0°C | 48mm | 🤔 Fair |
| February | 7° / 0°C | 45mm | 🤔 Fair |
| March | 12° / 3°C | 50mm | 🤔 Fair |
| April | 16° / 6°C | 64mm | 👍 Good |
| May | 20° / 10°C | 98mm | 👍 Good |
| June | 24° / 13°C | 87mm | 🌟 Great |
| July | 26° / 15°C | 89mm | 🌟 Great |
| August | 25° / 15°C | 88mm | 🌟 Great |
| September | 21° / 11°C | 70mm | 🌟 Great |
| October | 15° / 8°C | 74mm | 👍 Good |
| November | 9° / 3°C | 65mm | 🤔 Fair |
| December | 6° / 0°C | 65mm | 🤔 Fair |
January in Basel is cold, with average daytime highs around 5°C (41°F) and nighttime lows near 0°C (31°F). Expect roughly 48mm of precipitation spread over about 9 rainy days, with little rainfall.
☀️ About 65 hours of sunshine over the month (~2h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf
February in Basel is cold, with average daytime highs around 7°C (45°F) and nighttime lows near 0°C (32°F). Expect roughly 45mm of precipitation spread over about 8 rainy days, with little rainfall.
☀️ About 85 hours of sunshine over the month (~3h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf
March in Basel is chilly, with average daytime highs around 12°C (53°F) and nighttime lows near 3°C (37°F). Expect roughly 50mm of precipitation spread over about 9 rainy days, with little rainfall.
☀️ About 135 hours of sunshine over the month (~4h/day).
🎒 What to pack — jacket or coat · long-sleeve layers
April in Basel is mild, with average daytime highs around 16°C (61°F) and nighttime lows near 6°C (42°F). Expect roughly 64mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
☀️ About 167 hours of sunshine over the month (~6h/day).
🎒 What to pack — light jacket · layers for cool evenings
May in Basel is pleasantly warm, with average daytime highs around 20°C (68°F) and nighttime lows near 10°C (49°F). Expect roughly 98mm of precipitation spread over about 12 rainy days, with a moderate amount of rain.
☀️ About 186 hours of sunshine over the month (~6h/day).
🎒 What to pack — light layers · comfortable walking shoes
June in Basel is pleasantly warm, with average daytime highs around 24°C (75°F) and nighttime lows near 13°C (56°F). Expect roughly 87mm of precipitation spread over about 11 rainy days, with a moderate amount of rain.
☀️ About 212 hours of sunshine over the month (~7h/day).
🎒 What to pack — light layers · comfortable walking shoes
July in Basel is warm, with average daytime highs around 26°C (78°F) and nighttime lows near 15°C (59°F). Expect roughly 89mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 235 hours of sunshine over the month (~8h/day).
🎒 What to pack — light summer clothing · sunscreen and sunglasses
August in Basel is warm, with average daytime highs around 25°C (78°F) and nighttime lows near 15°C (59°F). Expect roughly 88mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 217 hours of sunshine over the month (~7h/day).
🎒 What to pack — light summer clothing · sunscreen and sunglasses
September in Basel is pleasantly warm, with average daytime highs around 21°C (69°F) and nighttime lows near 11°C (52°F). Expect roughly 70mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
☀️ About 160 hours of sunshine over the month (~5h/day).
🎒 What to pack — light layers · comfortable walking shoes
October in Basel is mild, with average daytime highs around 15°C (60°F) and nighttime lows near 8°C (46°F). Expect roughly 74mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 107 hours of sunshine over the month (~4h/day).
🎒 What to pack — light jacket · layers for cool evenings
November in Basel is chilly, with average daytime highs around 9°C (49°F) and nighttime lows near 3°C (38°F). Expect roughly 65mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 65 hours of sunshine over the month (~2h/day).
🎒 What to pack — jacket or coat · long-sleeve layers
December in Basel is cold, with average daytime highs around 6°C (42°F) and nighttime lows near 0°C (33°F). Expect roughly 65mm of precipitation spread over about 11 rainy days, with a moderate amount of rain.
☀️ About 54 hours of sunshine over the month (~2h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf