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September weather forecast in Ottawa
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
+22
+17
31 August, sun
+22
+17
Feels like
+22
751 mmHg
69%
5.1
m/s
W
31 August, Sunday. day, 22°; night, 17°; rain
1
+23
+18
1 September, mon
+23
+18
Feels like
+22
751 mmHg
69%
5.3
m/s
W
1 September, Monday. day, 23°; night, 18°; rain
2
+23
+17
2 September, tue
+23
+17
Feels like
+23
751 mmHg
72%
4.3
m/s
W
2 September, Tuesday. day, 23°; night, 17°; clear
3
+22
+17
3 September, wed
+22
+17
Feels like
+22
750 mmHg
67%
4.5
m/s
W
3 September, Wednesday. day, 22°; night, 17°; clear
4
+22
+16
4 September, thu
+22
+16
Feels like
+22
749 mmHg
67%
5.1
m/s
SW
4 September, Thursday. day, 22°; night, 16°; partly cloudy
5
+20
+17
5 September, fri
+20
+17
Feels like
+19
751 mmHg
72%
5.1
m/s
W
5 September, Friday. day, 20°; night, 17°; clear
6
+21
+15
6 September, sat
+21
+15
Feels like
+21
752 mmHg
70%
5.3
m/s
SW
6 September, Saturday. day, 21°; night, 15°; partly cloudy
7
+21
+16
7 September, sun
+21
+16
Feels like
+20
750 mmHg
75%
4.8
m/s
SW
7 September, Sunday. day, 21°; night, 16°; clear
8
+20
+16
8 September, mon
+20
+16
Feels like
+19
751 mmHg
72%
4.9
m/s
W
8 September, Monday. day, 20°; night, 16°; rain
9
+20
+15
9 September, tue
+20
+15
Feels like
+18
750 mmHg
74%
6
m/s
W
9 September, Tuesday. day, 20°; night, 15°; clear
10
+19
+14
10 September, wed
+19
+14
Feels like
+17
752 mmHg
68%
4.5
m/s
NW
10 September, Wednesday. day, 19°; night, 14°; rain
11
+20
+15
11 September, thu
+20
+15
Feels like
+19
752 mmHg
67%
5
m/s
W
11 September, Thursday. day, 20°; night, 15°; partly cloudy
12
+18
+14
12 September, fri
+18
+14
Feels like
+16
751 mmHg
70%
5.1
m/s
W
12 September, Friday. day, 18°; night, 14°; clear
13
+18
+14
13 September, sat
+18
+14
Feels like
+16
749 mmHg
77%
5.4
m/s
W
13 September, Saturday. day, 18°; night, 14°; rain
14
+19
+12
14 September, sun
+19
+12
Feels like
+17
751 mmHg
68%
4.9
m/s
W
14 September, Sunday. day, 19°; night, 12°; rain
15
+18
+14
15 September, mon
+18
+14
Feels like
+16
752 mmHg
73%
5.3
m/s
W
15 September, Monday. day, 18°; night, 14°; clear
16
+15
+13
16 September, tue
+15
+13
Feels like
+12
755 mmHg
70%
5.9
m/s
NW
16 September, Tuesday. day, 15°; night, 13°; rain
17
+17
+10
17 September, wed
+17
+10
Feels like
+16
755 mmHg
64%
4.1
m/s
SW
17 September, Wednesday. day, 17°; night, 10°; clear
18
+18
+12
18 September, thu
+18
+12
Feels like
+16
753 mmHg
69%
5.8
m/s
SW
18 September, Thursday. day, 18°; night, 12°; partly cloudy
19
+18
+12
19 September, fri
+18
+12
Feels like
+16
752 mmHg
69%
5.5
m/s
SW
19 September, Friday. day, 18°; night, 12°; partly cloudy
20
+19
+12
20 September, sat
+19
+12
Feels like
+17
753 mmHg
63%
5
m/s
SW
20 September, Saturday. day, 19°; night, 12°; clear
21
+19
+14
21 September, sun
+19
+14
Feels like
+18
751 mmHg
70%
5
m/s
S
21 September, Sunday. day, 19°; night, 14°; clear
22
+18
+14
22 September, mon
+18
+14
Feels like
+15
752 mmHg
70%
5.5
m/s
W
22 September, Monday. day, 18°; night, 14°; clear
23
+18
+13
23 September, tue
+18
+13
Feels like
+16
754 mmHg
73%
5.3
m/s
W
23 September, Tuesday. day, 18°; night, 13°; partly cloudy
24
+18
+12
24 September, wed
+18
+12
Feels like
+16
755 mmHg
70%
4.6
m/s
NW
24 September, Wednesday. day, 18°; night, 12°; clear
25
+18
+13
25 September, thu
+18
+13
Feels like
+16
755 mmHg
66%
4.9
m/s
W
25 September, Thursday. day, 18°; night, 13°; clear
26
+18
+13
26 September, fri
+18
+13
Feels like
+17
755 mmHg
66%
4
m/s
SW
26 September, Friday. day, 18°; night, 13°; clear
27
+20
+14
27 September, sat
+20
+14
Feels like
+19
752 mmHg
73%
4.8
m/s
SE
27 September, Saturday. day, 20°; night, 14°; rain
28
+18
+14
28 September, sun
+18
+14
Feels like
+16
749 mmHg
76%
5.1
m/s
S
28 September, Sunday. day, 18°; night, 14°; rain
29
+17
+14
29 September, mon
+17
+14
Feels like
+15
749 mmHg
79%
5.5
m/s
S
29 September, Monday. day, 17°; night, 14°; partly cloudy
30
+14
+10
30 September, tue
+14
+10
Feels like
+11
752 mmHg
74%
5.4
m/s
N
30 September, Tuesday. day, 14°; night, 10°; rain
1
+14
+10
1 October, wed
+14
+10
Feels like
+11
753 mmHg
70%
5.3
m/s
N
1 October, Wednesday. day, 14°; night, 10°; clear
2
+14
+10
2 October, thu
+14
+10
Feels like
+11
752 mmHg
70%
5.5
m/s
N
2 October, Thursday. day, 14°; night, 10°; overcast
3
+14
+10
3 October, fri
+14
+10
Feels like
+12
753 mmHg
75%
4.9
m/s
E
3 October, Friday. day, 14°; night, 10°; overcast
4
+15
+11
4 October, sat
+15
+11
Feels like
+12
752 mmHg
77%
5.5
m/s
S
4 October, Saturday. day, 15°; night, 11°; overcast
Average data for 10 years
Ottawa September
15
sunny days
8
days with precipitation
7
cloudy days
15 sunny days; 8 days with precipitation; 7 cloudy days;
70
%
air humidity
3.5
m/s
Wind
W
82
mm of precipitation
(8% of annual average)
air humidity 70%; 82 millimeters of precipitation (8% of annual average); Wind westerly 3.5 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
W
W
W
SW
W
SW
SW
W
W
NW
W
W
W
W
W
NW
SW
SW
SW
SW
S
W
W
NW
W
SW
SE
S
S
N
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
Montreal
Brooklyn
Colchester
Anjou
Laval
Lake George
Amherst
Claremont
Lenox
Cities with similar weather in September
Berlin
Vienna
Uralsk
Frankfurt am Main
Zurich
Tskhinval
Stuttgart
Baden-Baden
Ljubljana
