San Marcos in Fall

Across fall, daytime highs hold fairly steady around 31°C.

Once humidity and wind are folded in, fall brings about 91 days that feel above 32°C and 0 that feel at or below 0°C.

How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.

The sky is clear or mostly clear about 3% of the time across fall.

San Marcos gets around 735 mm of rain over 86 wet days across fall. The line is the day-by-day chance of measurable precipitation.

Most of fall feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

Winds average 5 km/h across fall.

Daylight runs from about 12 h 12 min in early September to 11 h 30 min by late November. The lit band spans sunrise to sunset each day.

Average shortwave solar energy reaching the ground each day across fall, about 4.6 kWh/m².

Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.

Clear-sky midday UV across fall averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.

San Marcos sits at 8.7°N, 75.1°W, 25 m above sea level, in Colombia. The nearest listed city is San Benito Abad, 32 km away.

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Marcos.