Climate Overview
The climate in Iliamna Airport is cool. The average annual temperature is 4°C and approximately 1253mm of precipitation falls per year. Iliamna Airport receives a notable amount of rainfall throughout the year, including during its driest month. Iliamna 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, March, February, when temperatures can drop to -10°C. Iliamna Airport experiences heavy snowfall, typically from January through December.
Temperature
Temperatures in Iliamna Airport vary considerably across the year, with a 28°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 18°C with a mean of 14°C. The coldest month is January, when overnight lows fall to -10°C and the daily average is -7°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between March and April, with a 7°C shift in average temperatures.
Precipitation
Iliamna Airport is a fairly wet location, receiving approximately 1253mm of precipitation annually, which averages out to around 104mm per month. The wettest month is September, averaging 161mm of rainfall. December and August also tend to see above-average precipitation. The driest month is June, with just 69mm. That's 92mm less than September, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Iliamna Airport receives heavy snowfall, accumulating around 364cm annually from January through December. The snowiest month is December, with approximately 90cm. Winter travel should account for significant snow cover.
Wind
Iliamna 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 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 3km/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
1 day until Summer
It is currently spring in Iliamna Airport, which began on March 20, 2026. Iliamna 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 18°C, while the coldest stretch bottoms out in January near -10°C. Summer is next, beginning on June 21, 2026 — 1 days from now.
Spring
Temperatures range from -7 to 10°C. Precipitation is moderate at around 244mm for the season, averaging 81mm 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 8 to 18°C. Precipitation is moderate at around 294mm for the season, averaging 98mm 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 -3 to 13°C. Rainfall is heavy, totalling around 416mm across the season with a monthly average of 139mm. Expect around 75cm of snow accumulation during this period. Winds are generally light, averaging 4km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -10 to -1°C. Precipitation is moderate at around 299mm for the season, averaging 100mm per month. Expect around 208cm of snow accumulation during this period. Winds are generally light, averaging 4km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Monthly Climate Data
The table below shows monthly climate averages for Iliamna 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.
