Climate Overview
The climate in Lemhi County Airport is cool. The average annual temperature is 3°C and approximately 712mm of precipitation falls per year. June is the wettest month, receiving around 96mm of rainfall. Lemhi 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 December, January, February, when temperatures can drop to -15°C. Lemhi County Airport experiences heavy snowfall, typically from January through December.
Temperature
Lemhi County Airport has a wide annual temperature range, spanning 41°C from the coldest to warmest months. The warmest month is July, when average highs reach 26°C and the mean temperature sits around 18°C. The coldest month is December, when overnight lows fall to -15°C and the daily average is -10°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 9°C shift in average temperatures.
Precipitation
Lemhi County Airport is a relatively dry area, receiving approximately 712mm of precipitation annually, which averages out to around 59mm per month. The wettest month is June, averaging 96mm of rainfall. May and February also tend to see above-average precipitation. The driest month is August, with just 22mm. That's 74mm 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. Lemhi County Airport receives heavy snowfall, accumulating around 350cm annually from January through December. The snowiest month is February, with approximately 68cm. Winter travel should account for significant snow cover.
Wind
Lemhi County Airport 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 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.
Seasons
84 days until Autumn
It is currently summer in Lemhi County Airport, which began on June 21, 2026. Lemhi 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 26°C, while the coldest stretch bottoms out in December near -15°C. Autumn is next, beginning on September 23, 2026 — 84 days from now.
Spring
Temperatures range from -6 to 14°C. Precipitation is moderate at around 230mm for the season, averaging 77mm per month. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 6 to 26°C. Rainfall is relatively light, with around 150mm over the season and a monthly average of 50mm. Winds are generally light, averaging 2km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -8 to 19°C. Precipitation is moderate at around 159mm for the season, averaging 53mm per month. Expect around 67cm of snow accumulation during this period. Winds are generally light, averaging 2km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from -15 to -1°C. Precipitation is moderate at around 173mm for the season, averaging 58mm per month. Expect around 167cm of snow accumulation during this period. Winds are generally light, averaging 2km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Best Time to Visit
The best time to visit Lemhi County Airport is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 27mm per month. By contrast, December can be quite cold with temperatures dropping to -15°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Lemhi 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.
