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September weather forecast in Deerfield

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

	744 mmHg		63%
	4.5 m/s		+21

31 August, Sunday. day, 26°; night, 22°; clear

1 September, mon

	744 mmHg		62%
	4.6 m/s		+21

1 September, Monday. day, 25°; night, 22°; partly cloudy

2 September, tue

	744 mmHg		62%
	4.5 m/s		+21

2 September, Tuesday. day, 25°; night, 20°; clear

3 September, wed

	744 mmHg		68%
	5 m/s		+21

3 September, Wednesday. day, 23°; night, 20°; partly cloudy

4 September, thu

	745 mmHg		68%
	5.1 m/s		+21

4 September, Thursday. day, 23°; night, 19°; partly cloudy

5 September, fri

	745 mmHg		60%
	5 m/s		+21

5 September, Friday. day, 24°; night, 18°; clear

6 September, sat

	744 mmHg		57%
	5.4 m/s		+21

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

7 September, sun

	745 mmHg		68%
	4.6 m/s		+20

7 September, Sunday. day, 22°; night, 19°; clear

8 September, mon

	745 mmHg		68%
	4.4 m/s		+20

8 September, Monday. day, 22°; night, 18°; clear

9 September, tue

	745 mmHg		66%
	5 m/s		+20

9 September, Tuesday. day, 23°; night, 18°; clear

10 September, wed

	746 mmHg		66%
	5 m/s		+20

10 September, Wednesday. day, 21°; night, 19°; clear

11 September, thu

	746 mmHg		61%
	4.6 m/s		+20

11 September, Thursday. day, 22°; night, 17°; clear

12 September, fri

	745 mmHg		62%
	4.6 m/s		+20

12 September, Friday. day, 21°; night, 17°; clear

13 September, sat

	745 mmHg		62%
	4.5 m/s		+20

13 September, Saturday. day, 21°; night, 17°; partly cloudy

14 September, sun

	746 mmHg		62%
	4.5 m/s		+20

14 September, Sunday. day, 21°; night, 17°; partly cloudy

15 September, mon

	748 mmHg		62%
	5.5 m/s		+19

15 September, Monday. day, 20°; night, 17°; partly cloudy

16 September, tue

	746 mmHg		63%
	5 m/s		+19

16 September, Tuesday. day, 22°; night, 17°; clear

17 September, wed

	745 mmHg		75%
	5 m/s		+19

17 September, Wednesday. day, 21°; night, 17°; rain

18 September, thu

	745 mmHg		69%
	4.6 m/s		+19

18 September, Thursday. day, 20°; night, 17°; clear

19 September, fri

	744 mmHg		62%
	5.4 m/s		+19

19 September, Friday. day, 23°; night, 17°; clear

20 September, sat

	744 mmHg		60%
	5 m/s		+19

20 September, Saturday. day, 23°; night, 19°; clear

21 September, sun

	746 mmHg		68%
	4.1 m/s		+19

21 September, Sunday. day, 21°; night, 17°; clear

22 September, mon

	747 mmHg		64%
	5 m/s		+19

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

23 September, tue

	747 mmHg		68%
	4.9 m/s		+19

23 September, Tuesday. day, 21°; night, 18°; partly cloudy

24 September, wed

	747 mmHg		66%
	4.6 m/s		+18

24 September, Wednesday. day, 20°; night, 17°; partly cloudy

25 September, thu

	745 mmHg		68%
	4.9 m/s		+18

25 September, Thursday. day, 21°; night, 18°; rain

26 September, fri

	744 mmHg		66%
	4.9 m/s		+18

26 September, Friday. day, 20°; night, 16°; clear

27 September, sat

	742 mmHg		64%
	4.9 m/s		+18

27 September, Saturday. day, 20°; night, 15°; rain

28 September, sun

	744 mmHg		69%
	6.5 m/s		+18

28 September, Sunday. day, 18°; night, 16°; clear

29 September, mon

	746 mmHg		67%
	5.3 m/s		+18

29 September, Monday. day, 16°; night, 14°; clear

30 September, tue

	746 mmHg		67%
	5.3 m/s		+17

30 September, Tuesday. day, 17°; night, 13°; clear

1 October, wed

	744 mmHg		66%
	5.6 m/s		+17

1 October, Wednesday. day, 17°; night, 14°; overcast

2 October, thu

	744 mmHg		73%
	5.3 m/s		+16

2 October, Thursday. day, 16°; night, 14°; partly cloudy

3 October, fri

	746 mmHg		75%
	5.1 m/s		+16

3 October, Friday. day, 16°; night, 13°; partly cloudy

4 October, sat

	746 mmHg		64%
	4.5 m/s		+16

4 October, Saturday. day, 19°; night, 13°; partly cloudy

Average data for 10 years

Deerfield September

18

sunny days

4

days with precipitation

8

cloudy days

18 sunny days; 4 days with precipitation; 8 cloudy days;

66

%

air humidity

3.5

m/s

WindE

60

mm of precipitation

(8% of annual average)

+19

°C

Water temperature

air humidity 66%; 60 millimeters of precipitation (8% of annual average); Wind easterly 3.5 Meters per second; Water temperature +19°

Weather graphs for September

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

E

N

NW

NE

E

W

NE

NE

SE

S

W

W

SW

E

E

SE

S

E

S

SW

E

SE

SE

E

E

E

NW

N

N

NE

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Chicago
Indianapolis
Michigan City
Wisconsin Dells
Appleton
Dixon
Ottawa
Iowa City
Washington

Cities with similar weather in September

Suhum
Burgas
Varna
Tivat
Podgorica
Toronto
The Golden Sands
Pomorie
Genoa

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

In September, the weather in Deerfield is typically warm. Average daily high temperature in September is about 21 degrees above zero. On average, Deerfield has 18 sunny, 8 partly cloudy, and 4 rainy days in September. The rains are usually heavy. September as well as July is considered the most comfortable time to visit Deerfield.

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