Climate Overview
The climate in Santo Tomas is cool. The average annual temperature is 5°C and approximately 1376mm of precipitation falls per year. February is the wettest month, receiving around 254mm of rainfall. Santo Tomas 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, October, September. The coldest months are June, July, August, when temperatures can drop to -5°C. Snowfall occurs from January to December, with around 102cm accumulating over the season.
Temperature
Santo Tomas sees moderate temperature variation throughout the year, ranging from -5°C to 14°C. November is the warmest month, though highs remain moderate at 14°C with a mean of 7°C. The coldest month is June, when overnight lows fall to -5°C and the daily average is 3°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs.
Precipitation
Santo Tomas is a fairly wet location, receiving approximately 1376mm of precipitation annually, which averages out to around 115mm per month. The wettest month is February, averaging 254mm of rainfall. January and March also tend to see above-average precipitation. The driest month is June, with just 9mm. That's 245mm 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. Snowfall is a regular feature from January to December, with around 102cm accumulating over the season. January typically sees the most snow at around 22cm.
Wind
Santo Tomas is relatively calm, with an average annual wind speed of 12km/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 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 13km/h in winter, 12km/h in spring, 11km/h in summer, 11km/h in autumn.
Seasons
89 days until Winter
It is currently autumn in Santo Tomas, which began on March 20, 2026. Santo Tomas 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 14°C, while the coldest stretch bottoms out in June near -5°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from -2 to 14°C. Precipitation is moderate at around 298mm for the season, averaging 99mm per month. Winds are generally light, averaging 12km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 1 to 13°C. Rainfall is heavy, totalling around 701mm across the season with a monthly average of 234mm. Winds are generally light, averaging 11km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -3 to 12°C. Rainfall is heavy, totalling around 345mm across the season with a monthly average of 115mm. Expect around 23cm of snow accumulation during this period. Winds are generally light, averaging 11km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -5 to 13°C. Precipitation is minimal, with only around 33mm for the entire season. Expect around 6cm of snow accumulation during this period. Winds are generally light, averaging 13km/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 Santo Tomas 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.
