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February Weather in Boulder, United States

Last updated: June 24, 2025

In February, the average temperature in Boulder, United States hovers around -9°C (16°F). Expect chilly conditions as temperatures can plunge to a minimum of -32°C (-25°F), while peaks may reach up to 8°C (46°F). With 55 mm (2.2 in) of precipitation spread over 14 days, moisture is prevalent, contributing to an average humidity of 88%.

February Temperature in Boulder

In February in Boulder, the average temperature is -9°C (16°F). The maximum can reach 8°C (46°F), while the minimum can drop as low as -32°C (-25°F). Travelers should be prepared for extremely cold conditions and plan their activities accordingly to ensure a safe and enjoyable visit.

February Weather in Boulder: Daily Temperature Highs, Lows, and Averages

The chart illustrates February temperature patterns in Boulder, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boulder, February typically has an average temperature of -9°C (16°F), with highs reaching up to 8°C (46°F) and lows dropping to around -32°C (-25°F).
JanFebMarAprMayJunJulAugSepOctNovDec181528344657656354382718
Data source: Temperature data for Boulder generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

February Precipitation in Boulder

In Boulder in February, the total precipitation amount is 55 mm (2.2 in) over a duration of 14 days.

February Precipitation Trends in Boulder

The chart displays monthly precipitation patterns in Boulder, with values for each month alongside February’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how February’s conditions compare to those of other months. In Boulder, February typically receives around 55 mm (2.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec2356406892112443943443432
Data source: Precipitation data for February generated using information from the Copernicus Climate Change Service.
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February Humidity in Boulder

In Boulder in February humidity is 88%. With an average temperature of -9°C (16°F), this humidity feels like a biting cold that seeps into your bones, making travel outside feel much more daunting and uncomfortable, as each breath turns into a cloud of mist in the frigid air.

February Average Humidity in Boulder

This chart illustrates the average monthly humidity levels in Boulder, with February’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In February, average humidity in Boulder is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%88%83%78%76%78%77%71%68%72%84%91%
Data source: Humidity data for February generated using information from the Copernicus Climate Change Service.

February UV Index in Boulder

In Boulder in February, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Boulder for better planning.

Maximum UV Index Levels in Boulder for February

The chart shows the monthly maximum UV Index (UVI) for Boulder in February, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In February, the maximum UV index in Boulder typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689111098532
Data source: Boulder February UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How February Weather in Boulder Compares to Other Months

Weather in Boulder varies notably across the year, with each month offering distinct climate conditions. This page compares February’s weather to other months in Boulder, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Boulder, showing how February’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)23 mm (0.9 inches)87%moderate
February Weather-9°C (16°F)55 mm (2.2 inches)88%moderate
March Weather-2°C (28°F)40 mm (1.6 inches)83%high
April Weather1°C (34°F)68 mm (2.7 inches)78%very high
May Weather8°C (46°F)92 mm (3.6 inches)76%very high
June Weather14°C (57°F)112 mm (4.4 inches)78%extreme
July Weather18°C (65°F)44 mm (1.7 inches)77%very high
August Weather17°C (64°F)39 mm (1.5 inches)71%very high
September Weather12°C (54°F)43 mm (1.7 inches)68%very high
October Weather3°C (38°F)44 mm (1.7 inches)72%moderate
November Weather-3°C (28°F)34 mm (1.3 inches)84%moderate
December Weather-8°C (19°F)32 mm (1.3 inches)90%low

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