Climate Insights for Lyons

The climate in Lyons is cool. The average annual temperature is 3°C and approximately 827mm of precipitation falls per year. Lyons receives a notable amount of rainfall throughout the year, including during its driest month. Lyons 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 December, January, February, when temperatures can drop to -12°C. Lyons experiences heavy snowfall, typically from January through December.

Temperatures in Lyons vary considerably across the year, with a 35°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 23°C with a mean of 15°C. The coldest month is December, when overnight lows fall to -12°C and the daily average is -7°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 8°C shift in average temperatures.

Lyons is a moderately rainy area, receiving approximately 827mm of precipitation annually, which averages out to around 69mm per month. The wettest month is May, averaging 123mm of rainfall. July and August also tend to see above-average precipitation. The driest month is December, with just 36mm. That's 86mm 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. Lyons receives heavy snowfall, accumulating around 361cm annually from January through December. The snowiest month is March, with approximately 60cm. Winter travel should account for significant snow cover.

Lyons is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, 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 1km/h gap between the calmest and windiest months.

It is currently summer in Lyons, which began on June 21, 2026. Lyons 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 23°C, while the coldest stretch bottoms out in December near -12°C. Autumn is next, beginning on September 23, 2026 — 83 days from now.

The table below shows monthly climate averages for Lyons 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.