Annual mean 24°C · wettest around November · prevailing wind E
Warmest
29.7 °C
Coldest
26.9 °C
Wettest
80%
Windiest
7.0 m/s
Prevailing
E
4.9 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
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 24°C. April is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 21°C. The rainy (wet) season in San Marcos runs from April to November, peaking in November with a 66% chance of rain on a given day. The dry season is December to March; January is the driest month, at 37%. Winds in San Marcos are highest in February, averaging 5.6 m/s (20 km/h), and lightest in October, at 2.3 m/s (8 km/h). The prevailing wind is from the E. The clearest skies in San Marcos come in February, when the sky is typically 30% covered; June is the cloudiest month, at 75%.
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
28°C
21°C
26°C
37%
38%
5.1 m/s
51
46
26
February
28°C
21°C
26°C
48%
30%
5.6 m/s
49
45
26
March
29°C
21°C
27°C
49%
38%
5.2 m/s
43
50
19
April
30°C
22°C
29°C
62%
54%
4.1 m/s
37
50
11
May
29°C
22°C
30°C
65%
69%
2.8 m/s
33
48
6
June
28°C
22°C
29°C
63%
75%
2.6 m/s
40
49
9
July
28°C
22°C
29°C
60%
73%
3.4 m/s
42
47
12
August
28°C
22°C
29°C
59%
70%
2.8 m/s
41
46
10
September
28°C
21°C
30°C
63%
74%
2.4 m/s
40
49
7
October
27°C
21°C
29°C
63%
72%
2.3 m/s
44
47
11
November
27°C
21°C
28°C
66%
66%
2.8 m/s
47
50
15
December
28°C
21°C
27°C
43%
46%
4.3 m/s
51
47
25
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 27°C at their warmest in November, its coolest month, and 30°C in April, its warmest; the coolest hours of the day run from 21°C to 22°C through the year, and the average temperature over the year is 24°C around the clock. Rain is most likely around November and least likely around January. 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 28°CLow 21°CRain 43%
Winter in San Marcos has typical daily highs of about 28°C and lows of about 21°C, with a 43% chance of rain on a given day.
San Marcos weather in springMarch to May
High 29°CLow 22°CRain 58%
Spring in San Marcos has typical daily highs of about 29°C and lows of about 22°C, with a 58% chance of rain on a given day.
San Marcos weather in summerJune to August
High 28°CLow 22°CRain 61%
Summer in San Marcos has typical daily highs of about 28°C and lows of about 22°C, with a 61% chance of rain on a given day.
San Marcos weather in autumnSeptember to November
High 27°CLow 21°CRain 64%
Autumn in San Marcos has typical daily highs of about 27°C and lows of about 21°C, with a 64% chance of rain on a given day.
When is the rainy season in San Marcos?
The rainy (wet) season in San Marcos runs from April to November, peaking in November with a 66% chance of rain on a given day. The dry season is December to March; January is the driest month, at 37%.
What time of year is San Marcos windiest?
Winds in San Marcos are highest in February, averaging 5.6 m/s (20 km/h), and lightest in October, at 2.3 m/s (8 km/h). The prevailing wind is from the E.
What is the average temperature in San Marcos year round?
The average temperature in San Marcos over the whole year is 24°C. April is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 21°C.