Climate normals · 1970–2000
San Marcos Climate
San Marcos is a city in United States (CA) with a population of about 92,931. Its average annual temperature is 17.6°C (64°F), with roughly 370 mm of rain per year.
17.6°C
Avg Temp
370
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
San Marcos Climate
San Marcos has an average annual temperature of 17.6°C (64°F) and receives about 370 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
17.6°C
Avg Temp
370
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 13° / 55° | 75 mm |
| February | 13° / 56° | 67 mm |
| March | 14° / 57° | 65 mm |
| April | 16° / 60° | 30 mm |
| May | 18° / 64° | 10 mm |
| June | 20° / 68° | 2 mm |
| July | 23° / 73° | 1 mm |
| August | 24° / 74° | 4 mm |
| September | 23° / 73° | 9 mm |
| October | 20° / 67° | 9 mm |
| November | 16° / 60° | 46 mm |
| December | 13° / 55° | 52 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit San Marcos
The most comfortable months to visit San Marcos are typically June, July and September, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 31°C high). The coldest is January (near 6°C low). January is usually the wettest month.
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Frequently Asked Questions
The most comfortable months to visit San Marcos are typically June, July and September, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
San Marcos, United States has an average annual temperature of 17.6°C and about 370 mm of precipitation per year. The warmest month is August and the coldest is January.
In August, the hottest month, daily highs in San Marcos average about 31°C (87°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.