ClimateAverages

Boulder Weather in January

JanFebMarAprMayJunJulAugSepOctNovDec
January daytime high
2.6°C
January overnight low
-10.3°C
January average
-3.8°C

In January, Boulder typically sees daytime highs of 2.6°C and overnight lows around -10.3°C. Compared to the annual average high of 13.6°C, January runs -11.1°C.

vs. annual avg high
-11.1°C
Rank among 12 months
#12 warmest
Hottest year overall
1933

Where January ranks in Boulder

Jan3°FebMarAprMayJunJulAugSepOctNovDec

FAQ

What is the average temperature in Boulder in January?

January in Boulder averages a daytime high of 2.6°C and an overnight low of -10.3°C.

Is January warm or cold in Boulder?

January runs -11.1°C compared to Boulder's annual average high of 13.6°C, ranking #12 of 12 months by warmth.

What should I pack for Boulder in January?

Plan for daytime highs near 2.6°C and cooler evenings around -10.3°C.

Other months for Boulder

FebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember

January in nearby cities

DenverColorado SpringsAuroraFort CollinsLakewoodThorntonArvadaWestminsterCentennialPuebloGreeleyHighlands Ranch