Climate Overview
The climate in Rock County Airport is cool. The average annual temperature is 9°C and approximately 731mm of precipitation falls per year. May is the wettest month, receiving around 115mm of rainfall. Rock County Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, February, December, when temperatures can drop to -9°C. Snowfall occurs from January to December, with around 139cm accumulating over the season.
Temperature
Rock County Airport has a wide annual temperature range, spanning 40°C from the coldest to warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 24°C. The coldest month is January, when overnight lows fall to -9°C and the daily average is -5°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 10°C shift in average temperatures.
Precipitation
Rock County Airport is a relatively dry area, receiving approximately 731mm of precipitation annually, which averages out to around 61mm per month. The wettest month is May, averaging 115mm of rainfall. July and April also tend to see above-average precipitation. The driest month is February, with just 23mm. That's 92mm less than May, 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 139cm accumulating over the season. December typically sees the most snow at around 31cm.
Wind
Rock County Airport is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
75 days until Autumn
It is currently summer in Rock County Airport, which began on June 21, 2026. Rock County Airport 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 31°C, while the coldest stretch bottoms out in January near -9°C. Autumn is next, beginning on September 23, 2026 — 75 days from now.
Spring
Temperatures range from -2 to 21°C. Precipitation is moderate at around 266mm for the season, averaging 89mm per month. Winds are generally light, averaging 4km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 16 to 31°C. Precipitation is moderate at around 254mm for the season, averaging 85mm per month. Winds are generally light, averaging 4km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from -2 to 26°C. Rainfall is relatively light, with around 126mm over the season and a monthly average of 42mm. Expect around 22cm of snow accumulation during this period. Winds are generally light, averaging 4km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from -9 to 3°C. Rainfall is relatively light, with around 86mm over the season and a monthly average of 29mm. Expect around 72cm of snow accumulation during this period. Winds are generally light, averaging 4km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Best Time to Visit
The best time to visit Rock County Airport is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 76mm 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.
Monthly Climate Data
The table below shows monthly climate averages for Rock County Airport 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.
