Climate Overview
The climate in Mc Lean/Gray County Airport is temperate. The average annual temperature is 15°C and approximately 502mm of precipitation falls per year. August is the wettest month, receiving around 68mm of rainfall. Mc Lean/Gray County Airport 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, December, February, when temperatures can drop to -2°C. Light snow can occur between January and December.
Temperature
Mc Lean/Gray County Airport has a wide annual temperature range, spanning 36°C from the coldest to warmest months. The warmest month is July, when average highs reach 34°C and the mean temperature sits around 27°C. The coldest month is January, when overnight lows fall to -2°C and the daily average is 3°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.
Precipitation
Mc Lean/Gray County Airport is a relatively dry area, receiving approximately 502mm of precipitation annually, which averages out to around 42mm per month. The wettest month is August, averaging 68mm of rainfall. October and April also tend to see above-average precipitation. The driest month is February, with just 14mm. That's 54mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Light snowfall can occur between January and December, totalling around 26cm annually. October is the snowiest month with approximately 6cm.
Wind
Mc Lean/Gray County Airport is relatively calm, with an average annual wind speed of 5km/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 6km/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 2km/h between the calmest and windiest months.
Seasons
82 days until Autumn
It is currently summer in Mc Lean/Gray County Airport, which began on June 21, 2026. Mc Lean/Gray 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 34°C, while the coldest stretch bottoms out in January near -2°C. Autumn is next, beginning on September 23, 2026 — 82 days from now.
Spring
Temperatures range from 4 to 27°C. Precipitation is moderate at around 157mm for the season, averaging 52mm per month. Winds are generally light, averaging 6km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 19 to 34°C. Rainfall is relatively light, with around 143mm over the season and a monthly average of 48mm. Winds are generally light, averaging 5km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 4 to 28°C. Rainfall is relatively light, with around 138mm over the season and a monthly average of 46mm. Expect around 9cm of snow accumulation during this period. Winds are generally light, averaging 5km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from -2 to 14°C. Rainfall is relatively light, with around 64mm over the season and a monthly average of 21mm. Expect around 14cm of snow accumulation during this period. Winds are generally light, averaging 5km/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 Mc Lean/Gray County Airport is during May, June and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 53mm per month. By contrast, July can be uncomfortably hot with highs reaching 34°C, while January is the coldest period with lows 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 Mc Lean/Gray 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.
