Average data for 10 years
1 September
Monday
+27°
+13°
2 September
Tuesday
+27°
+12°
3 September
Wednesday
+27°
+13°
4 September
Thursday
+26°
+12°
5 September
Friday
+26°
+12°
6 September
Saturday
+26°
+13°
7 September
Sunday
+27°
+13°
8 September
Monday
+26°
+13°
9 September
Tuesday
+26°
+13°
10 September
Wednesday
+26°
+13°
11 September
Thursday
+27°
+13°
12 September
Friday
+27°
+12°
13 September
Saturday
+26°
+12°
14 September
Sunday
+25°
+12°
15 September
Monday
+24°
+12°
16 September
Tuesday
+23°
+12°
17 September
Wednesday
+22°
+11°
18 September
Thursday
+22°
+11°
19 September
Friday
+22°
+11°
20 September
Saturday
+23°
+11°
21 September
Sunday
+23°
+10°
22 September
Monday
+23°
+11°
23 September
Tuesday
+23°
+10°
24 September
Wednesday
+24°
+10°
25 September
Thursday
+24°
+11°
26 September
Friday
+23°
+11°
27 September
Saturday
+24°
+11°
28 September
Sunday
+24°
+10°
29 September
Monday
+23°
+10°
30 September
Tuesday
+21°
+10°
Cities near you
Canada
Vancouver
United States
Seattle
United States
Portland
United States
Salem
Canada
Victoria
Cities with similar weather in September
Hungary
Budapest
Kyrgyzstan
Bishkek
Italy
Genoa
Moldova
Cahul
Croatia
Zagreb
In September, the weather in Lake Oswego is typically warm. Average daily high temperature in September is about 25 degrees above zero. On average, Lake Oswego has 16 sunny, 7 rainy, and 7 partly cloudy days in September. The rains are usually moderate. September as well as July and August is considered the most comfortable time to visit Lake Oswego.