San Mateo Weather in May
What's the weather like in San Mateo (Quetzaltenango) in May 2025?
The climate in San Mateo during May can be summarized as mild and a little damp.
May is in the spring in San Mateo and is typically the warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 10°C (50°F) is normal.
| Daytime temperature | 22.5°C 72.5°F |
|---|---|
| Nightly temperature | 9.9°C 49.8°F |
| Average temperature | 16.2°C 61.2°F |
| Daily sunshine | 7.8 hrs |
| Avg rainfall | 97 mm 3.8 ins |
| Rainy days | 16 days |
| Sea temperature | 30.1°C 86.1°F |
| Humidity | 75% |
| Windspeed | 9.4kph 6 mph |
On average May is the 5th wettest month of the year in San Mateo with around 97mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.8 hours of sunshine per day.
May temperatures in San Mateo
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 Mateo in May 2025.
Other monthly averages
San Mateo weather stats
| Hottest month: | May | 22.2°C 72°F |
|---|---|---|
| Driest month: | January | 0mm 0ins |
| Sunniest month: | January | 8.9hrs |
| Coldest month: | January | 16.8°C 62.2°F |
| Wettest month: | June | 173mm 6.8ins |
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