Climate Overview
The climate in San Fernando is warm and mild. The average annual temperature is 24°C and approximately 564mm of precipitation falls per year. September is the wettest month, receiving around 117mm of rainfall. San Fernando is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, December, February, when temperatures can drop to 12°C.
Temperature
Temperatures in San Fernando vary considerably across the year, with a 25°C difference between the coldest and warmest months. August is the hottest month, with daytime highs reaching 37°C and an average of 30°C. January is the coolest month, with minimum temperatures around 12°C and an average of 17°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.
Precipitation
San Fernando is a relatively dry area, receiving approximately 564mm of precipitation annually, which averages out to around 47mm per month. The wettest month is September, averaging 117mm of rainfall. July and June also tend to see above-average precipitation. The driest month is December, with just 13mm. That's 104mm less than September, 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 Fernando is moderately windy, with an average annual wind speed of 21km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in October, with average winds dropping to 18km/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
81 days until Summer
It is currently spring in San Fernando, which began on March 20, 2026. San Fernando 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 August at around 37°C, while the coldest stretch bottoms out in January near 12°C. Summer is next, beginning on June 21, 2026 — 81 days from now.
Spring
Temperatures range from 18 to 34°C. Rainfall is relatively light, with around 117mm over the season and a monthly average of 39mm. Winds are moderate at around 23km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 25 to 37°C. Precipitation is moderate at around 174mm for the season, averaging 58mm per month. Winds are moderate at around 22km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 17 to 34°C. Precipitation is moderate at around 217mm for the season, averaging 72mm per month. Winds are moderate at around 19km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 12 to 26°C. Rainfall is relatively light, with around 56mm over the season and a monthly average of 19mm. Winds are moderate at around 21km/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 Fernando is during January, February, March, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 33mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 37°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 Fernando 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.
