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September weather forecast in Evanston

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

31 August, sun

	747 mmHg		73%
	6.7 m/s		+21

31 August, Sunday. day, 24°; night, 21°; clear

1 September, mon

	747 mmHg		73%
	6.3 m/s		+21

1 September, Monday. day, 24°; night, 21°; clear

2 September, tue

	747 mmHg		72%
	6.5 m/s		+21

2 September, Tuesday. day, 25°; night, 21°; clear

3 September, wed

	746 mmHg		72%
	6.7 m/s		+21

3 September, Wednesday. day, 25°; night, 21°; clear

4 September, thu

	747 mmHg		72%
	6.8 m/s		+21

4 September, Thursday. day, 24°; night, 21°; clear

5 September, fri

	747 mmHg		72%
	6.6 m/s		+21

5 September, Friday. day, 24°; night, 20°; clear

6 September, sat

	747 mmHg		73%
	7.1 m/s		+21

6 September, Saturday. day, 24°; night, 20°; clear

7 September, sun

	746 mmHg		73%
	7.3 m/s		+20

7 September, Sunday. day, 24°; night, 20°; rain

8 September, mon

	746 mmHg		74%
	7.2 m/s		+20

8 September, Monday. day, 22°; night, 19°; rain

9 September, tue

	747 mmHg		76%
	6.9 m/s		+20

9 September, Tuesday. day, 22°; night, 19°; partly cloudy

10 September, wed

	747 mmHg		74%
	7 m/s		+20

10 September, Wednesday. day, 22°; night, 19°; rain

11 September, thu

	747 mmHg		73%
	7.2 m/s		+20

11 September, Thursday. day, 23°; night, 19°; rain

12 September, fri

	746 mmHg		73%
	7 m/s		+20

12 September, Friday. day, 22°; night, 19°; rain

13 September, sat

	746 mmHg		74%
	7.3 m/s		+20

13 September, Saturday. day, 22°; night, 18°; rain

14 September, sun

	747 mmHg		71%
	6.9 m/s		+20

14 September, Sunday. day, 22°; night, 18°; clear

15 September, mon

	748 mmHg		71%
	7 m/s		+19

15 September, Monday. day, 21°; night, 18°; clear

16 September, tue

	748 mmHg		72%
	6.8 m/s		+19

16 September, Tuesday. day, 21°; night, 18°; clear

17 September, wed

	747 mmHg		72%
	6.6 m/s		+19

17 September, Wednesday. day, 22°; night, 18°; clear

18 September, thu

	747 mmHg		72%
	6.8 m/s		+19

18 September, Thursday. day, 21°; night, 18°; clear

19 September, fri

	746 mmHg		74%
	7.7 m/s		+19

19 September, Friday. day, 21°; night, 18°; partly cloudy

20 September, sat

	746 mmHg		76%
	7.5 m/s		+19

20 September, Saturday. day, 22°; night, 18°; rain

21 September, sun

	746 mmHg		74%
	7.7 m/s		+19

21 September, Sunday. day, 21°; night, 18°; partly cloudy

22 September, mon

	747 mmHg		72%
	7.4 m/s		+19

22 September, Monday. day, 20°; night, 17°; rain

23 September, tue

	747 mmHg		72%
	7 m/s		+19

23 September, Tuesday. day, 19°; night, 16°; partly cloudy

24 September, wed

	747 mmHg		73%
	7.5 m/s		+18

24 September, Wednesday. day, 20°; night, 16°; rain

25 September, thu

	746 mmHg		73%
	7.3 m/s		+18

25 September, Thursday. day, 20°; night, 16°; partly cloudy

26 September, fri

	745 mmHg		71%
	7.4 m/s		+18

26 September, Friday. day, 20°; night, 17°; clear

27 September, sat

	744 mmHg		72%
	7.7 m/s		+18

27 September, Saturday. day, 19°; night, 16°; partly cloudy

28 September, sun

	745 mmHg		75%
	8.2 m/s		+18

28 September, Sunday. day, 18°; night, 15°; rain

29 September, mon

	747 mmHg		72%
	8.5 m/s		+18

29 September, Monday. day, 18°; night, 15°; partly cloudy

30 September, tue

	747 mmHg		71%
	8.1 m/s		+17

30 September, Tuesday. day, 18°; night, 15°; clear

1 October, wed

	747 mmHg		71%
	8.1 m/s		+17

1 October, Wednesday. day, 18°; night, 15°; clear

2 October, thu

	747 mmHg		74%
	8.1 m/s		+16

2 October, Thursday. day, 18°; night, 15°; partly cloudy

3 October, fri

	746 mmHg		74%
	8.1 m/s		+16

3 October, Friday. day, 18°; night, 15°; rain

4 October, sat

	747 mmHg		73%
	8 m/s		+16

4 October, Saturday. day, 18°; night, 15°; rain

Average data for 10 years

Evanston September

13

sunny days

10

days with precipitation

4

cloudy days

13 sunny days; 10 days with precipitation; 4 cloudy days;

73

%

air humidity

5.1

m/s

WindS

82

mm of precipitation

(8% of annual average)

+19

°C

Water temperature

air humidity 73%; 82 millimeters of precipitation (8% of annual average); Wind southerly 5.1 Meters per second; Water temperature +19°

Weather graphs for September

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

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S

S

S

S

S

S

SE

SE

SE

S

S

S

S

S

SE

SE

SE

S

S

S

S

S

S

S

S

S

SE

S

S

1

Average data for 10 years

2

3

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5

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7

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10

11

12

13

14

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30

Daytime temperature

Night-time temperature

Cities near you

Chicago
Indianapolis
Sidney
Milwaukee
Sheboygan
Madison
Michigan City
Washington
Ottawa

Cities with similar weather in September

Suhum
Burgas
Varna
Tivat
The Sunny Beach
Podgorica
The Golden Sands
Pomorie
Genoa

The weather forecast for September 2025 is based on historical data from the past 10 years.

September in Evanston is the sunniest month of the year. In September, the weather in Evanston is typically warm. Average daily high temperature in September is about 22 degrees above zero. On average, Evanston has 13 sunny, 10 rainy, and 7 partly cloudy days in September. The rains are usually heavy.

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