Measurements:
°C
°F
CURRENT WEATHER
10:09
Oshkosh
66°F
NE 17 mph
Feels like: 66°F
Precip: 86%
World Resorts USA Oshkosh Weather

7 Day Weather Forecast

09.15
tue
DAY
70°F
E 15 mph
precip
29%
NIGHT
64°F
SE 8 mph
precip
17%
09.16
wed
DAY
62°F
W 9 mph
precip
18%
NIGHT
62°F
NW 6 mph
precip
21%
09.17
thu
DAY
62°F
SW 3 mph
precip
34%
NIGHT
64°F
SW 9 mph
precip
17%
09.18
fri
DAY
58°F
W 21 mph
precip
35%
NIGHT
58°F
W 21 mph
precip
74%
09.19
sat
DAY
58°F
SW 16 mph
precip
72%
NIGHT
60°F
SW 15 mph
precip
35%
09.20
sun
DAY
62°F
W 19 mph
precip
24%
NIGHT
62°F
W 16 mph
precip
19%
09.21
mon
DAY
58°F
W 19 mph
precip
83%
NIGHT
62°F
W 14 mph
precip
71%

Oshkosh Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Oshkosh was 23.3°F. The maximum and minimum values were 20.9°F and 24.7°F respectively.

Oshkosh on the Weather Map

Best Time to Visit Oshkosh
The most sunny months:
August 15 days
July 14 days
September 13 days
The most warm months:
July 81.4 °F
August 79.5 °F
June 76.0 °F
Warmest sea temperature:
July 78.8 °F
August 77.6 °F
June 72.3 °F
The most cold months:
January 20.6 °F
February 23.8 °F
December 28.0 °F
The most rainy months:
June 3 days
July 2 days
May 2 days
The most windy months:
November 12 mph
April 12 mph
October 11 mph
more details