Santo Tomas Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Santo Tomas.
Climate overview of Santo Tomas
With consistently stable weather, Santo Tomas, Peru, sees little seasonal temperature change. Daytime highs average 31°C (88°F), ranging from 32°C (90°F) in September to 30°C (86°F) in July.
Rainfall is high, totalling around 2881 mm (113 in) per year. March is the wettest month and August the driest. The sunniest month is August, with 7.6 hours of sunshine per day on average.
Santo Tomas Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Santo Tomas — and find the best time to visit.
Monthly Temperature in Santo Tomas
The climate in Santo Tomas remains fairly constant, offering very warm temperatures throughout the year. Average maximum daytime temperatures range from a very warm 32°C (90°F) in September, the warmest time of the year, to a very warm 30°C (86°F) during cooler months like July.
At night, you can expect temperatures ranging from 24°C (75°F) in September to around 22°C (72°F) during July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Santo Tomas
Santo Tomas is known for its substantial rainfall, with annual precipitation reaching 2881 mm (113 in). While rainfall varies throughout the year, each season offers its own charm. March brings wetter days averaging 313 mm (12 in) of precipitation, spread over 22 rainy days.
In contrast, the driest month August experiences a drier climate, with about 156 mm (6.1 in) of rainfall spread across 16 rainy days. For more details, please visit our Santo Tomas Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Santo Tomas
While the amount of sunshine in Santo Tomas varies throughout the year, all seasons offer their own charm. Enjoy up to 7.6 hours of daily sun in August, and experience slightly darker atmosphere in February, with about 5.0 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Santo Tomas by Month
The city experiences its highest humidity in April, reaching 84%. In September, the humidity drops to its lowest level at 78%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Santo Tomas
The mean wind speed varies between 1 m/s (2 knots) and 1 m/s (2 knots) throughout the year. It is lowest in January, February, March, April, May, June, July, August, September, October, November and December and highest during January, February, March, April, May, June, July, August, September, October, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Santo Tomas
Make your experience more enjoyable by planning to be outside during the cooler parts of the day, either early morning or as the sun begins to set. Need help choosing your next travel destination? We offer a specialized tool that matches you with locations based on your weather preferences. Explore destinations that suit your climate preferences.
Frequently asked questions about the climate in Santo Tomas
What is the best time to visit Santo Tomas?
July and August typically offer the most optimal weather in Santo Tomas. In contrast, January, February, March, April, May, June, September, October, November and December tend to have less optimal conditions.
What temperatures can I expect in Santo Tomas?
Daytime highs range from 30°C (86°F) in July to 32°C (90°F) in September. Nighttime lows range from 22°C (72°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does Santo Tomas get?
Annual rainfall is around 2881 mm (113 in). March is the wettest month with 313 mm (12 in), while August is the driest with 156 mm (6.1 in).
How sunny is Santo Tomas?
Santo Tomas receives around 2,196 hours of sunshine per year. August is the sunniest month with 228 hours, while February is the cloudiest with just 151 hours. Overall, Santo Tomas enjoys abundant sunshine.
Santo Tomas 3-Day Forecast
Santo Tomas 3-Day Forecast
Santo Tomas on the map
Santo Tomas is highlighted — select any city to see its climate.
Popular this month
Where to go in June — average daytime high across popular destinations.
Iquitos
30°C (86°F) Trujillo
23°C (73°F) Lima21°C (70°F) Arequipa
19°C (66°F) Puno16°C (61°F) Machu Picchu
15°C (59°F) Cusco15°C (59°F) Urubamba13°C (55°F) 
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