Climate Overview
The climate in Jefferson County International Airport is cool. The average annual temperature is 9°C and approximately 1420mm of precipitation falls per year. Jefferson County International Airport receives a notable amount of rainfall throughout the year, including during its driest month. Jefferson County International Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are February, December, January, when temperatures can drop to 2°C. Snowfall occurs from January to December, with around 181cm accumulating over the season.
Temperature
Jefferson County International Airport sees moderate temperature variation throughout the year, ranging from 2°C to 18°C. August is the warmest month, though highs remain moderate at 18°C with a mean of 15°C. February is the coolest month, with minimum temperatures around 2°C and an average of 4°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between September and October, with a 4°C shift in average temperatures.
Precipitation
Jefferson County International Airport is a fairly wet location, receiving approximately 1420mm of precipitation annually, which averages out to around 118mm per month. The wettest month is November, averaging 202mm of rainfall. January and December also tend to see above-average precipitation. The driest month is August, with just 31mm. That's 171mm less than November, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 181cm accumulating over the season. January typically sees the most snow at around 39cm.
Wind
Jefferson County International Airport is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
1 day until Summer
It is currently spring in Jefferson County International Airport, which began on March 20, 2026. Jefferson County International 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 August at around 18°C, while the coldest stretch bottoms out in February near 2°C. Summer is next, beginning on June 21, 2026 — 1 days from now.
Spring
Temperatures range from 4 to 14°C. Rainfall is heavy, totalling around 306mm across the season with a monthly average of 102mm. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 11 to 18°C. Precipitation is moderate at around 157mm for the season, averaging 52mm per month. Winds are generally light, averaging 3km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 6 to 16°C. Rainfall is heavy, totalling around 437mm across the season with a monthly average of 146mm. Expect around 28cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 2 to 6°C. Rainfall is heavy, totalling around 520mm across the season with a monthly average of 173mm. Expect around 113cm of snow accumulation during this period. Winds are generally light, averaging 3km/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 Jefferson County International Airport is during August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 15°C with modest rainfall averaging 31mm per month. By contrast, February can be quite cold with temperatures dropping to 2°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Jefferson County International 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.
