Annual mean 27°C · wettest around June · prevailing wind W
Warmest
31.4 °C
Coldest
29.6 °C
Wettest
9%
Windiest
2.9 m/s
Prevailing
W
2.3 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in San Marcos over the whole year is 27°C. February is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 23°C. San Marcos has no sharply defined rainy season: the chance of rain on a given day runs from 2% in February, the driest month, to 11% in June, the wettest. Winds in San Marcos are highest in February, averaging 2.6 m/s (9 km/h), and lightest in October, at 1.5 m/s (5 km/h). The prevailing wind is from the W. The clearest skies in San Marcos come in February, when the sky is typically 45% covered; May is the cloudiest month, at 66%.
Month by month San Marcos climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
31°C
23°C
34°C
3%
45%
2.1 m/s
10
29
5
February
31°C
24°C
34°C
2%
45%
2.6 m/s
10
29
5
March
31°C
24°C
35°C
4%
55%
2.5 m/s
10
28
4
April
31°C
25°C
35°C
9%
62%
2.2 m/s
10
23
4
May
30°C
25°C
35°C
11%
66%
1.7 m/s
9
20
4
June
30°C
24°C
35°C
11%
66%
1.6 m/s
10
22
4
July
30°C
24°C
35°C
10%
62%
1.8 m/s
10
24
4
August
30°C
24°C
34°C
10%
62%
1.8 m/s
9
29
4
September
30°C
24°C
34°C
9%
64%
1.6 m/s
10
29
4
October
30°C
24°C
34°C
10%
63%
1.5 m/s
11
26
4
November
30°C
24°C
34°C
9%
60%
1.5 m/s
11
25
5
December
31°C
24°C
35°C
4%
49%
1.8 m/s
10
23
4
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short San Marcos weather by season
Year round, San Marcos has days of about 30°C at their warmest in September, its coolest month, and 31°C in February, its warmest; the coolest hours of the day run from 23°C to 25°C through the year, and the average temperature over the year is 27°C around the clock. Rain is most likely around June and least likely around February. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
San Marcos weather in winterDecember to February
High 31°CLow 23°CRain 3%
Winter in San Marcos has typical daily highs of about 31°C and lows of about 23°C, with a 3% chance of rain on a given day.
San Marcos weather in springMarch to May
High 31°CLow 24°CRain 8%
Spring in San Marcos has typical daily highs of about 31°C and lows of about 24°C, with a 8% chance of rain on a given day.
San Marcos weather in summerJune to August
High 30°CLow 24°CRain 11%
Summer in San Marcos has typical daily highs of about 30°C and lows of about 24°C, with a 11% chance of rain on a given day.
San Marcos weather in autumnSeptember to November
High 30°CLow 24°CRain 9%
Autumn in San Marcos has typical daily highs of about 30°C and lows of about 24°C, with a 9% chance of rain on a given day.
When is the rainy season in San Marcos?
San Marcos has no sharply defined rainy season: the chance of rain on a given day runs from 2% in February, the driest month, to 11% in June, the wettest.
What time of year is San Marcos windiest?
Winds in San Marcos are highest in February, averaging 2.6 m/s (9 km/h), and lightest in October, at 1.5 m/s (5 km/h). The prevailing wind is from the W.
What is the average temperature in San Marcos year round?
The average temperature in San Marcos over the whole year is 27°C. February is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 23°C.