Weather in Oshkosh: April
| Average day temperature: | 48.4°F | |
| Average night temperature: | 38.9°F | |
| Sea water temperature: | 43.4°F | |
| Number of sunny days: | 5 days | |
| Day length: | 12.8 - 14.2 hours | |
| Number of rainy days: | 2 days | |
| Precipitation totals: | 1.2 in. | |
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Air temperature in April, °F
The highest day temperature during April of 2025 was 69°F. At the same time the lowest night temperature was 23°F. Daily and nightly averages during April were 51.4°F and 38.0°F.
Sea water temperature in Oshkosh in April, °F
The average sea water temperature in April of 2025 was 44.8°F. The highest and lowest sea temperatures during the month were 53.8°F and 37.9°F.
Mostly all days in April are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in April, in.
Precipitation total value in Oshkosh in April is 1.2 in. Other months of the year show relatively similar values.
The average wind speed value in April is 12.1 mph It makes April one of the most windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in April is: 5.3.
Best time for vacation in Oshkosh
Oshkosh on a weather map

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