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Altona, Colorado Weather Forecast
Altona, Colorado Weather
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Weather Forecast for Altona, Colorado : Boulder County
Issued: 3:27 am MST Jan 16, 2026 Latitude: 40.1338744 Longitude: -105.2827677 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Saturday Sunday M.L.King Day Tuesday Wednesday Thursday
Mostly Sunny on This Afternoon Mostly Cloudy on Tonight Sunny on Saturday Sunny on Sunday Mostly Sunny on M.L.King Day Sunny on Tuesday Mostly Sunny on Wednesday Mostly Sunny on Thursday
High: 39°F Low: 19°F High: 39°F High: 53°F High: 45°F High: 56°F High: 57°F High: 50°F
Low: 28°F Low: 21°F Low: 26°F Low: 32°F Low: 28°F  
Mostly Sunny Mostly Cloudy Sunny Sunny Mostly Sunny Sunny Mostly Sunny Mostly Sunny
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Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 39. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 46 mph.

Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 19. North northwest wind 10 to 14 mph, with gusts as high as 24 mph.

Sunny on Saturday Saturday... Sunny, with a high near 39. Breezy, with a north northwest wind 10 to 15 mph, with gusts as high as 24 mph.

Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 28. West wind 9 to 14 mph, with gusts as high as 24 mph.

Sunny on Sunday Sunday... Sunny, with a high near 53. West wind 6 to 11 mph, with gusts as high as 21 mph.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 21.

Mostly Sunny on M.L.King Day M.L.King Day... Mostly sunny, with a high near 45.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 26.

Sunny on Tuesday Tuesday... Sunny, with a high near 56.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 32.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 57.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 28.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 50.

Sun Almanac for Altona, Colorado
Sunrise: 07:21 AM
Sunset: 5:01 PM
Civil Sunrise:06:51 AM
Civil Sunset: 5:31 PM
Nautical Sunrise: 06:18 AM
Nautical Sunset: 6:04 PM
Astro Sunrise: 05:45 AM
Astro Sunset: 6:37 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.