Climate Overview
The climate in Ronald Reagan Washington National Airport is temperate. The average annual temperature is 15°C and approximately 1273mm of precipitation falls per year. Ronald Reagan Washington National Airport receives a notable amount of rainfall throughout the year, including during its driest month. Ronald Reagan Washington National 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 0°C. Light snow can occur between January and December.
Temperature
Temperatures in Ronald Reagan Washington National Airport vary considerably across the year, with a 32°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 32°C and the mean temperature sits around 27°C. The coldest month is January, when overnight lows fall to 0°C and the daily average is 3°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.
Precipitation
Ronald Reagan Washington National Airport is a fairly wet location, receiving approximately 1273mm of precipitation annually, which averages out to around 106mm per month. The wettest month is July, averaging 150mm of rainfall. May and August also tend to see above-average precipitation. The driest month is March, with just 77mm. That's 73mm less than July, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Light snowfall can occur between January and December, totalling around 42cm annually. January is the snowiest month with approximately 23cm.
Wind
Ronald Reagan Washington National 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 March, 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.
Seasons
4 days until Summer
It is currently spring in Ronald Reagan Washington National Airport, which began on March 20, 2026. Ronald Reagan Washington National 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 32°C, while the coldest stretch bottoms out in January near 0°C. Summer is next, beginning on June 21, 2026 — 4 days from now.
Spring
Temperatures range from 5 to 24°C. Rainfall is heavy, totalling around 312mm across the season with a monthly average of 104mm. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 20 to 32°C. Rainfall is heavy, totalling around 398mm across the season with a monthly average of 133mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 6 to 27°C. Precipitation is moderate at around 297mm for the season, averaging 99mm per month. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 0 to 11°C. Precipitation is moderate at around 266mm for the season, averaging 89mm per month. Expect around 33cm 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.
Monthly Climate Data
The table below shows monthly climate averages for Ronald Reagan Washington National 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.
