Unión Weather in March
What's the weather like in Unión (San Luis) in March 2025?
The climate in Unión during March can be summarized as warm and reasonably dry.
March is in the fall / autumn in Unión and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 28°C (82°F), whilst at night 13°C (55°F) is normal.
| Daytime temperature | 27.7°C 81.8°F |
|---|---|
| Nightly temperature | 12.8°C 55°F |
| Average temperature | 20.2°C 68.4°F |
| Daily sunshine | 8.9 hrs |
| Avg rainfall | 54 mm 2.1 ins |
| Rainy days | 8 days |
| Sea temperature | 18.9°C 66°F |
| Humidity | 68% |
| Windspeed | 9kph 6 mph |
On average March is the 4th wettest month of the year in Unión with around 54mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.9 hours of sunshine per day.
March temperatures in Unión
March rainfall
March hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Unión in March 2025.
Other monthly averages
Unión weather stats
| Hottest month: | January | 31.8°C 89.2°F |
|---|---|---|
| Driest month: | June | 10mm 0.4ins |
| Sunniest month: | February | 10.7hrs |
| Coldest month: | July | 16°C 60.8°F |
| Wettest month: | December | 75mm 3ins |
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