Climate Overview
The climate in Ascencion is cool. The average annual temperature is 4°C and approximately 1679mm of precipitation falls per year. Ascencion receives a notable amount of rainfall throughout the year, including during its driest month. Ascencion is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: November, January, February. The coldest months are July, June, August, when temperatures can drop to -3°C. Ascencion experiences heavy snowfall, typically from January through December.
Temperature
Ascencion sees moderate temperature variation throughout the year, ranging from -3°C to 11°C. November is the warmest month, though highs remain moderate at 11°C with a mean of 5°C. The coldest month is July, when overnight lows fall to -3°C and the daily average is 3°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs.
Precipitation
Ascencion is a fairly wet location, receiving approximately 1679mm of precipitation annually, which averages out to around 140mm per month. The wettest month is February, averaging 276mm of rainfall. March and January also tend to see above-average precipitation. The driest month is June, with just 30mm. That's 246mm less than February, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Ascencion receives heavy snowfall, accumulating around 202cm annually from January through December. The snowiest month is February, with approximately 30cm. Winter travel should account for significant snow cover.
Wind
Ascencion 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 August, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 1km/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
3 days until Winter
It is currently autumn in Ascencion, which began on March 20, 2026. Ascencion is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in November at around 11°C, while the coldest stretch bottoms out in July near -3°C. Winter is next, beginning on June 21, 2026 — 3 days from now.
Spring
Temperatures range from -1 to 11°C. Rainfall is heavy, totalling around 405mm across the season with a monthly average of 135mm. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 1 to 11°C. Rainfall is heavy, totalling around 730mm across the season with a monthly average of 243mm. Winds are generally light, averaging 1km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -1 to 10°C. Rainfall is heavy, totalling around 428mm across the season with a monthly average of 143mm. Expect around 40cm of snow accumulation during this period. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -3 to 9°C. Rainfall is relatively light, with around 116mm over the season and a monthly average of 39mm. Expect around 26cm of snow accumulation during this period. Winds are generally light, averaging 2km/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 Ascencion 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.
