San Marcos Weather in May
What's the weather like in San Marcos (San Marcos) in May 2025?
The climate in San Marcos during May can be summarized as mild and damp.
May is in the spring in San Marcos and is typically the warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 11°C (52°F) is normal.
| Daytime temperature | 23.7°C 74.6°F |
|---|---|
| Nightly temperature | 11°C 51.7°F |
| Average temperature | 17.3°C 63.1°F |
| Daily sunshine | 7.7 hrs |
| Avg rainfall | 117 mm 4.6 ins |
| Rainy days | 15 days |
| Sea temperature | 30.1°C 86.1°F |
| Humidity | 76% |
| Windspeed | 9.4kph 6 mph |
On average May is the 5th wettest month of the year in San Marcos with around 117mm 4.6 inches of rain making it a damp time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.7 hours of sunshine per day.
May temperatures in San Marcos
May rainfall
May 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 San Marcos in May 2025.
Other monthly averages
San Marcos weather stats
| Hottest month: | May | 23.3°C 73.9°F |
|---|---|---|
| Driest month: | January | 0mm 0ins |
| Sunniest month: | January | 8.9hrs |
| Coldest month: | January | 18.2°C 64.8°F |
| Wettest month: | June | 193mm 7.6ins |
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