Climate Overview
The climate in San Julian is hot. The average annual temperature is 25°C and approximately 1041mm of precipitation falls per year. December is the wettest month, receiving around 153mm of rainfall. San Julian 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: October, November, September. The coldest months are July, June, August, when temperatures can drop to 17°C.
Temperature
San Julian sees moderate temperature variation throughout the year, ranging from 17°C to 33°C. The warmest month is October, when average highs reach 33°C and the mean temperature sits around 27°C. July is the coolest month, with minimum temperatures around 17°C and an average of 22°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.
Precipitation
San Julian is a moderately rainy area, receiving approximately 1041mm of precipitation annually, which averages out to around 87mm per month. The wettest month is December, averaging 153mm of rainfall. February and January also tend to see above-average precipitation. The driest month is July, with just 29mm. That's 124mm less than December, 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.
Wind
San Julian is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in March, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.
Seasons
89 days until Winter
It is currently autumn in San Julian, which began on March 20, 2026. San Julian 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 October at around 33°C, while the coldest stretch bottoms out in July near 17°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 21 to 33°C. Precipitation is moderate at around 254mm for the season, averaging 85mm per month. Winds are moderate at around 20km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 23 to 32°C. Rainfall is heavy, totalling around 427mm across the season with a monthly average of 142mm. Winds are moderate at around 18km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 19 to 31°C. Precipitation is moderate at around 245mm for the season, averaging 82mm per month. Winds are moderate at around 17km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 17 to 30°C. Rainfall is relatively light, with around 115mm over the season and a monthly average of 38mm. Winds are moderate at around 20km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit San Julian is during May, June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 45mm per month. By contrast, October can be uncomfortably hot with temperatures reaching 33°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for San Julian 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. 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.
