Climate Insights for Fond du Lac

The climate in Fond du Lac is cool. The average annual temperature is 9°C and approximately 893mm of precipitation falls per year. Fond du Lac receives a notable amount of rainfall throughout the year, including during its driest month. Fond du Lac is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -9°C. Snowfall occurs from January to December, with around 135cm accumulating over the season.

Fond du Lac has a wide annual temperature range, spanning 36°C from the coldest to warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -9°C and the daily average is -6°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 8°C shift in average temperatures.

Fond du Lac is a moderately rainy area, receiving approximately 893mm of precipitation annually, which averages out to around 74mm per month. The wettest month is June, averaging 101mm of rainfall. April and May also tend to see above-average precipitation. The driest month is February, with just 39mm. That's 62mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 135cm accumulating over the season. January typically sees the most snow at around 29cm.

Fond du Lac is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 15km/h in winter, 15km/h in spring, 12km/h in summer, 15km/h in autumn.

It is currently summer in Fond du Lac, which began on June 21, 2026. Fond du Lac is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 27°C, while the coldest stretch bottoms out in January near -9°C. Autumn is next, beginning on September 23, 2026 (8 days from now).

The best time to visit Fond du Lac is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 86mm per month. By contrast, January can be quite cold with temperatures dropping to -9°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Fond du Lac based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.