What is the weather like in San Juan vs Ulaanbaatar in December?

In December, San Juan averages 30°C high / 23°C low with about 80 mm of rain; Ulaanbaatar averages -13°C high / -26°C low with about 3 mm.

San Juan vs Ulaanbaatar in December

San Juan is the better pick in December — 73 vs 29 on SeasonMap's comfort score. San Juan is hot, a little rain, clean air, while Ulaanbaatar is freezing, dry, poor air quality.

San Juan vs Ulaanbaatar — December climate, side by side

	🇵🇷 San Juan	🇲🇳 Ulaanbaatar
Comfort score	73/100 (B)	29/100 (F)
Feels-like high	32°C	-18°C
Avg high / low	30° / 23°	-13° / -26°
Rainfall	80 mm	3 mm
Rainy days	12	1
Humidity	82%	66%
Air quality (AQI)	32	122

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

San Juan vs Ulaanbaatar in December — FAQ

Is December better in San Juan or Ulaanbaatar?: San Juan is the better pick in December — 73 vs 29 on SeasonMap's comfort score. San Juan is hot, a little rain, clean air, while Ulaanbaatar is freezing, dry, poor air quality.
What is the weather like in San Juan vs Ulaanbaatar in December?: In December, San Juan averages 30°C high / 23°C low with about 80 mm of rain; Ulaanbaatar averages -13°C high / -26°C low with about 3 mm.