Chicago (United States of America) in general has a mild continental climate. The day temperatures range from -0.4 °C (31.3 °F) in January to 29.1 °C (84.4 °F) in July. The highest night temperatures could be experienced in July with 18.8 °C (65.8 °F), the lowest in January with -8.2 °C (17.2 °F). The least rainy month in Chicago is February with its 9 days of rain, the rainiest month is April, when it rains 12 days.

January weather

The sea temperature continues to descent, the value of this measure is 3.3 °C (38.0 °F) in Chicago, while the day temperature is on its minimum, with its value of -0.4 °C (31.3 °F). The rainfall amount descents similarly to the previous month. The number of sun hours (without clouds) rise's start could be observed in January. The minimum of the night temperature is observable, with its value being -8.2 °C (17.2 °F).

February weather

The sea temperature descents similarly to the previous month in Chicago, while the beginning of the rise of the day temperature could be noticed in February. The rainfall amount is on its minimum, its value is 47 mm (1.83 in), and the number of rainy days is on its minimum too, with its value being 9 days. The night temperature starts to rise, the value of this measure is -6.0 °C (21.2 °F). The rise of the number of sun hours (without clouds) can be observed, with its value being 5 hours.

March weather

The minimum of the sea temperature is observable, its value is 2.0 °C (35.5 °F) in Chicago, while the day temperature rises similarly to the previous month, the value of this measure is 8.3 °C (46.9 °F). The beginning of the rise of the rainfall amount could be noticed, its value is 62 mm (2.46 in), and the beginning of the rise of the number of rainy days could be noticed too, with its value of 11 days. The rise of the night temperature can be observed, with its value being -0.8 °C (30.6 °F). The number of sun hours (without clouds) rises similarly to the previous month.

April weather

The day temperature continues to rise, the value of this measure is 15.4 °C (59.7 °F) in Chicago, while the sea temperature rise's start could be observed in this month. The maximum of the number of rainy days is observable, its value is 12 days, while the rainfall amount rises similarly to the previous month, with its value of 92 mm (3.62 in). The rise of the night temperature can be observed, its value is 4.6 °C (40.3 °F). The number of sun hours (without clouds) rises similarly to the previous month, its value is 7 hours.

May weather

The rise of the day temperature can be observed, with its value of 21.4 °C (70.5 °F) in Chicago, and the rise of the sea temperature can be observed as well, with its value being 6.2 °C (43.2 °F). The tourist season is about to start. The rainfall amount continues to rise, its value is 102 mm (4.00 in). The night temperature rises similarly to the previous month, with its value being 10.0 °C (50.0 °F). The humidity reaches its minimum in this month.

June weather

The day temperature continues to rise, with its value being 27.1 °C (80.8 °F) in Chicago, and the rise of the sea temperature can be observed too, its value is 13.0 °C (55.3 °F). The tourist season is taking place. The number of rainy days descent's start could be observed, with its value of 11 days. The number of sun hours (without clouds) is on its maximum, its value is 10 hours. The night temperature rises similarly to the previous month, with its value of 15.9 °C (60.6 °F).

July weather

The tourist season is taking place in Chicago. The day temperature reaches its maximum, while the sea temperature rises similarly to the previous month, with its value being 20.2 °C (68.4 °F). The number of rainy days continues to descent, the value of this measure is 10 days. The maximum of the night temperature is observable, with its value being 18.8 °C (65.8 °F).

August weather

The beginning of the descent of the day temperature could be noticed, with its value of 28.0 °C (82.4 °F) in Chicago, while the sea temperature reaches its maximum, the value of this measure is 22.2 °C (71.9 °F). The maximum of the rainfall amount can be noticed in this month. The night temperature descent's start could be observed in this month. The number of sun hours (without clouds) starts to descent in August. The tourist season is close to its peak this month.

September weather

The tourist season continues in Chicago. The sea temperature starts to descent, its value is 19.7 °C (67.5 °F), while the descent of the day temperature can be observed, its value is 24.3 °C (75.7 °F). The beginning of the descent of the rainfall amount could be noticed, with its value of 82 mm (3.23 in). The night temperature descents similarly to the previous month, its value is 13.0 °C (55.4 °F). The number of sun hours (without clouds) descents similarly to the previous month.

October weather

The day temperature descents similarly to the previous month, its value is 17.2 °C (63.0 °F) in Chicago, and the descent of the sea temperature can be observed as well, the value of this measure is 14.1 °C (57.4 °F). The number of sun hours (without clouds) continues to descent, its value is 6 hours. The night temperature descents similarly to the previous month, its value is 6.4 °C (43.5 °F).

November weather

The sea temperature descents similarly to the previous month, with its value of 8.9 °C (48.1 °F) in Chicago, and the day temperature continues to descent as well, with its value being 9.2 °C (48.6 °F). The number of rainy days rise's start could be observed, the value of this measure is 10 days. The number of sun hours (without clouds) descents similarly to the previous month, the value of this measure is 4 hours. The night temperature continues to descent.

December weather

The sea temperature continues to descent in Chicago, and the day temperature descents similarly to the previous month too, its value is 1.7 °C (35.1 °F). The rainfall amount descent's start could be observed, the value of this measure is 61 mm (2.41 in). The night temperature descents similarly to the previous month, with its value of -5.6 °C (21.9 °F). The minimum of the number of sun hours (without clouds) is observable in this month. The minimum of the day length can be noticed, with its value being 9 hours.

FAQs

How many sunny hours can I expect in Chicago in April?

There is an average length of sunshine of 7 hours per day in Chicago in April.

Are there good conditions to visit in May in Chicago?

May is a good month to visit Chicago. There are some people, who may feel a slight chill at 21.4 °C (70.5 °F), but others will feel perfectly fine. The temperature of 10.0 °C (50.0 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.

What is the average number of rainy days in June in Chicago?

In June in Chicago, we can expect 11 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.6 days of the week, or in general - 36 % days.

Is it hot in Chicago in July?

In Chicago in July, you will enjoy nice warm weather, but it will also be pleasant and you probably won't feel hot.

What temperature can I expect during the day in Chicago in August?

In August in Chicago, the average daily temperatures will be 28.0 °C (82.4 °F). The ideal temperature for enjoying sunbathing by the water and a good temperature for other activities. For some people, it will be too hot in the direct sunlight and the stay may not be so pleasant. Don't forget to pack flip-flops, sunscreen, and a hand fan if necessary - it may come in handy.

What is the sea temperature in September in Chicago?

In Chicago in September expect the sea to be warm at 19.7 °C (67.5 °F). At this sea temperature, swimming probably won't be the best experience. You probably won't like to stay in water for a long time. On the other hand, there are a minority of people who seek these conditions.

Is October part of the wet season in Chicago?

No, there is no wet season in October in Chicago - you can expect 9 days of rain during the month.