Grand Island, Colorado Weather
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Weather Forecast for Grand Island, Colorado : Boulder County
Issued: 4:01 am MDT Jun 24, 2025 Latitude: 39.9708202 Longitude: -105.6033346 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Wednesday Thursday Friday Saturday Sunday Monday
60% chance of thunderstorms on Today 20% chance of thunderstorms on Tonight 70% chance of thunderstorms on Wednesday 20% chance of thunderstorms on Thursday Sunny on Friday 10% chance of thunderstorms on Saturday 20% chance of thunderstorms on Sunday Thunderstorms on Monday
High: 63°F Low: 46°F High: 60°F High: 63°F High: 69°F High: 68°F High: 67°F High: 65°F
Low: 42°F Low: 45°F Low: 48°F Low: 48°F Low: 46°F  
Thunderstorms Thunderstorms Thunderstorms Thunderstorms Sunny Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
BROOMFIELD - (KBJC)
57°
Clear
as of 6:00 AM MDST
Rel. Humidity: 93%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
6 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
KREMMLING - (K20V)
41°
Partly Cloudy
as of 5:55 AM MDST
Rel. Humidity: 56%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 12000ft
Current Conditions at
FT COLLINS - (KFNL)
57°
Cloudy
as of 5:56 AM MDST
Rel. Humidity: 100%
Dew Point: 57°F
Visibility: 8 Miles
Pressure: 30.18 in.
Flight Rule: MVFR
Wind Data
5 MPH
050° Northeast
Cloud Level(s): Few at 800ft, Solid Overcast at 1800ft
60% chance of thunderstorms Today Today... Showers and thunderstorms likely, mainly after 3pm. Increasing clouds, with a high near 63. South southeast wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
20% chance of thunderstorms Tonight Tonight... A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Mostly cloudy, with a low around 46. South wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
70% chance of thunderstorms Wednesday Wednesday... Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 60. West northwest wind 6 to 10 mph becoming east southeast in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
30% chance of thunderstorms Wednesday Night Wednesday Night... A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 42. South southeast wind 6 to 10 mph becoming west in the evening. Winds could gust as high as 17 mph. Chance of precipitation is 30%.
20% chance of thunderstorms Thursday Thursday... A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 63. West wind 7 to 10 mph becoming east southeast in the afternoon. Winds could gust as high as 20 mph.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 45.
Sunny on Friday Friday... Sunny, with a high near 69.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 48. Breezy.
10% chance of thunderstorms Saturday Saturday... A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68. Breezy.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 48.
20% chance of thunderstorms Sunday Sunday... A chance of showers and thunderstorms. Mostly sunny, with a high near 67.
10% chance of thunderstorms Sunday Night Sunday Night... A slight chance of showers and thunderstorms. Partly cloudy, with a low around 46.
Thunderstorms on Monday Monday... Showers likely and possibly a thunderstorm. Partly sunny, with a high near 65.
Current Radar Image


Sun Almanac for Grand Island, Colorado
Sunrise: 05:35 AM
Sunset: 8:35 PM
Civil Sunrise:05:02 AM
Civil Sunset: 9:08 PM
Nautical Sunrise: 04:20 AM
Nautical Sunset: 9:50 PM
Astro Sunrise: 03:32 AM
Astro Sunset: 10:38 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.