Basel, Basel-City Weather by Month and Climate Averages

How much rain does Basel get?

Basel gets 734 mm of precipitation in an average year, spread over about 177 days with measurable rain. That is more rainy days than 69% of France.

May is the wettest month, with 78 mm. February is the driest, with 41 mm. September has the most rainy days, about 18.

The longest dry spell in the last five years lasted 17 days, to November 11, 2024.

Basel weather by month

Basel weather in January

In January, Basel averages a high of 6°C and a low of -2°C. It gets 45 mm of precipitation over about 13 rainy days. The sun is out about 29% of daylight hours. The January record high is 20°C (1978) and the record low is -23°C (1985).

Basel weather in February

In February, Basel averages a high of 8°C and a low of -1°C. It gets 41 mm of precipitation over about 12 rainy days. The sun is out about 32% of daylight hours. The February record high is 22°C (1990) and the record low is -21°C (1999).

Basel weather in March

In March, Basel averages a high of 13°C and a low of 1°C. It gets 45 mm of precipitation over about 13 rainy days. The sun is out about 40% of daylight hours. The March record high is 26°C (2021) and the record low is -17°C (2005).

Basel weather in April

In April, Basel averages a high of 17°C and a low of 4°C. It gets 55 mm of precipitation over about 12 rainy days. The sun is out about 40% of daylight hours. The April record high is 29°C (2018) and the record low is -6°C (2003). April is one of the most comfortable months to visit.

Basel weather in May

In May, Basel averages a high of 21°C and a low of 9°C. It gets 78 mm of precipitation over about 16 rainy days. The sun is out about 35% of daylight hours. The May record high is 33°C (2022) and the record low is -2°C (1976).

Basel weather in June

In June, Basel averages a high of 24°C and a low of 12°C. It gets 76 mm of precipitation over about 15 rainy days. The sun is out about 40% of daylight hours. The June record high is 37°C (2014) and the record low is 2°C (2005). June is one of the most comfortable months to visit.

Basel weather in July

In July, Basel averages a high of 27°C and a low of 14°C. It gets 68 mm of precipitation over about 15 rainy days. The sun is out about 47% of daylight hours. The July record high is 38°C (2022) and the record low is 6°C (2011).

Basel weather in August

In August, Basel averages a high of 26°C and a low of 13°C. It gets 74 mm of precipitation over about 16 rainy days. The sun is out about 44% of daylight hours. The August record high is 39°C (2003) and the record low is 3°C (1998). August is one of the most comfortable months to visit.

Basel weather in September

In September, Basel averages a high of 22°C and a low of 9°C. It gets 65 mm of precipitation over about 18 rainy days. The sun is out about 41% of daylight hours. The September record high is 33°C (2023) and the record low is 1°C (2003). September is one of the most comfortable months to visit.

Basel weather in October

In October, Basel averages a high of 16°C and a low of 6°C. It gets 67 mm of precipitation over about 18 rainy days. The sun is out about 27% of daylight hours. The October record high is 31°C (1985) and the record low is -6°C (1997).

Basel weather in November

In November, Basel averages a high of 10°C and a low of 2°C. It gets 58 mm of precipitation over about 14 rainy days. The sun is out about 26% of daylight hours. The November record high is 23°C (2015) and the record low is -13°C (2010).

Basel weather in December

In December, Basel averages a high of 6°C and a low of -1°C. It gets 60 mm of precipitation over about 15 rainy days. The sun is out about 23% of daylight hours. The December record high is 20°C (1973) and the record low is -18°C (1975).

Sunshine, humidity and wind in Basel

July is the sunniest month in Basel, with sunshine about 47% of daylight hours. December is the cloudiest, at 23%. Over the year the sun shines about 35% of daylight hours. Basel is cloudier than 65% of France.

Humidity peaks in December at 88% and is lowest in July at 65%.

Basel has about 7 days a year above 32°C. Basel is hotter than 52% of France.

First and last freeze in Basel

The first fall freeze in Basel typically comes around October 31, and the last spring freeze around April 18. That leaves a frost-free growing season of about 196 days.

Basel weather records

The hottest temperature on record at the Basel station is 39°C, on August 13, 2003. The coldest is -23°C, on January 6, 1985.

The wettest day on record brought 141 mm of rain, on June 26, 1982.

30 all-time records have been set at the station since 1973.

The best time to visit Basel

The most comfortable time to visit is typically April, June, and August to September, when daytime highs sit near 22°C.

Winter (December–February) is chilly, with average highs around 7°C and lows near -1°C.

Spring (March–May) is mild, with average highs around 17°C and lows near 5°C.

Summer (June–August) is warm, with average highs around 26°C and lows near 13°C.

Autumn (September–November) is mild, with average highs around 16°C and lows near 6°C.

Basel climate questions

How much rain does Basel get?

Basel gets 734 mm of precipitation in an average year, over about 177 rainy days.

What is the wettest month in Basel?

May is the wettest month in Basel, with 78 mm. February is the driest, with 41 mm.

How many rainy days does Basel have a year?

Basel has about 177 days with measurable rain in an average year. September has the most, about 18.

What is the hottest month in Basel?

July is the warmest month in Basel, with an average high of 27°C.

What is the coldest month in Basel?

January is the coldest month in Basel, with an average low of -2°C.

What is the record high temperature in Basel?

The record high at the Basel station is 39°C, set on August 13, 2003. The record low is -23°C, on January 6, 1985.

What is the sunniest month in Basel?

July is the sunniest month in Basel, with sunshine about 47% of daylight hours. December is the cloudiest.

When is the first frost in Basel?

The first fall freeze in Basel typically comes around October 31. The last spring freeze is around April 18.

What is the best time to visit Basel?

The most comfortable time to visit is typically April, June, and August to September, when daytime highs sit near 22°C.