What is the weather like in Hong Kong vs San Francisco in December?

In December, Hong Kong averages 21°C high / 15°C low with about 14 mm of rain; San Francisco averages 15°C high / 9°C low with about 121 mm.

Hong Kong vs San Francisco in December

Hong Kong is the better pick in December — 89 vs 67 on SeasonMap's comfort score. Hong Kong is nice, dry, poor air quality, while San Francisco is cool, rainy, clean air.

Hong Kong vs San Francisco — December climate, side by side

	🇭🇰 Hong Kong	🇺🇸 San Francisco
Comfort score	89/100 (A)	67/100 (C)
Feels-like high	19°C	13°C
Avg high / low	21° / 15°	15° / 9°
Rainfall	14 mm	121 mm
Rainy days	3	9
Humidity	67%	82%
Air quality (AQI)	112	50

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

Month by month

Hong Kong vs San Francisco in December — FAQ

Is December better in Hong Kong or San Francisco?: Hong Kong is the better pick in December — 89 vs 67 on SeasonMap's comfort score. Hong Kong is nice, dry, poor air quality, while San Francisco is cool, rainy, clean air.
What is the weather like in Hong Kong vs San Francisco in December?: In December, Hong Kong averages 21°C high / 15°C low with about 14 mm of rain; San Francisco averages 15°C high / 9°C low with about 121 mm.