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

In December, Reykjavík averages 3°C high / -2°C low with about 110 mm of rain; San Juan averages 30°C high / 23°C low with about 80 mm.

Reykjavík vs San Juan in December

San Juan is the better pick in December — 73 vs 33 on SeasonMap's comfort score. San Juan is hot, a little rain, clean air, while Reykjavík is freezing, rainy, clean air.

Reykjavík vs San Juan — December climate, side by side

	🇮🇸 Reykjavík	🇵🇷 San Juan
Comfort score	33/100 (F)	73/100 (B)
Feels-like high	-3°C	32°C
Avg high / low	3° / -2°	30° / 23°
Rainfall	110 mm	80 mm
Rainy days	16	12
Humidity	83%	82%
Air quality (AQI)	37	32

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

Month by month

Reykjavík vs San Juan in December — FAQ

Is December better in Reykjavík or San Juan?: San Juan is the better pick in December — 73 vs 33 on SeasonMap's comfort score. San Juan is hot, a little rain, clean air, while Reykjavík is freezing, rainy, clean air.
What is the weather like in Reykjavík vs San Juan in December?: In December, Reykjavík averages 3°C high / -2°C low with about 110 mm of rain; San Juan averages 30°C high / 23°C low with about 80 mm.