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LakeMonster.com is a BETA data site created to help lake enthusiasts of all kinds by combining the latest satellite imagery, weather data, lake staff information, and community member reports to communicate current lake conditions.
Check the map below for point temperatures. Drought conditions and low water levels are affecting smaller lake temperature accuracy. We are working to resolve the issue. Please help others by submitting your observed temperatures.

Union Reservoir , CO
GPS: 40.176, -105.033 Google Map · LakeMonster Map
Views: 796
Favorited: 1
~ 1462 miles away - (3185)
Today's Forecast Dec 06, 2021
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Union Reservoir's current water temperature is 49°F. Today's forecast is: Partly cloudy throughout the day., with a high around 65°F and a low around 22°F. Winds are out of the WNW at 10 mph with gusts of 33 mph.

Current Conditions
49°F
Water estimate as of
Dec 04, 2021
65° 22° F
Air
ENE 10 - 33 gust
Wind
Temps are estimates of the surface temp acquired throughout the lake. Values are generally within a few degrees, but may be inaccurate due to factors including cloud cover, land interference, water levels, and input data quality/accuracy. If a temp is inaccurate, please contact us. Consider helping us improve our accuracy by creating an account and submitting your observed water temps in the section below.


Community Water Temps
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   Your
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Latest satelite temp: 49°F
49°F
  Warning: Greater than 10% difference.




Forecast as of Dec 06, 2021
gust  
5  
6+  
11+  
16+  
21+
Sunday
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65° 14°
WNW 10-33 mph
8
10

Partly cloudy throughout the day.
Monday
image
40° 25°
ESE 4-10 mph
6
8
10
12
2
4
6
8

Mostly cloudy throughout the day.
Tuesday
image
51° 21°
SSE 4-9 mph
6
8
10
12
2
4
6
8

Partly cloudy throughout the day.
Wednesday
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59° 33°
WSW 6-25 mph
6
8
10
12
2
4
6
8

Clear throughout the day.
Thursday
image
57° 29°
NNW 8-19 mph
6
8
10
12
2
4
6
8

Mostly cloudy throughout the day.
Friday
image
35°
NE 9-26 mph
6
8
10
12
2
4
6
8

Foggy in the morning.
Saturday
image
43° 21°
WSW 4-9 mph
6
8
10
12
2
4
6
8

Clear throughout the day.
Sunday
image
62° 25°
SW 4-6 mph
6
8
10
12
2
4
6
8

Clear throughout the day.

Latest Satellite Imagery
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Description
Union Reservoir is a 736 acre body of water providing many outdoor recreational activities. Originally called Calkins Lake, the reservoir was carved out during the last glacial age and is one of only a few natural lakes in Colorado. In 1903, the Union Ditch Company began drilling a tunnel to release water into the St. Vrain Creek. According to Colorado water law, that made Union a true reservoir.

Related sites:
www.longmontcolorado.gov

Attributes
Acres 736
Base Elevation 0 Ft

Pressure
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Nearby Lakes
Water: 48° H: 65° L: 22°
Wind 10-31 mph
Panama Reservoir Number 1 Partly cloudy throughout the day. 9 miles from Union Reservoir Gooding, CO
Water: 50° H: 65° L: 21°
Wind 9-32 mph
Mcintosh Lake Clear throughout the day. 10 miles from Union Reservoir Longmont, CO
Water: 50° H: 64° L: 22°
Wind 8-30 mph
Boulder Reservoir Partly cloudy throughout the day. 20 miles from Union Reservoir Boulder, CO
Water: 52° H: 60° L: 18°
Wind 11-47 mph
Carter Lake Dangerously windy in the morning and afternoon. 22 miles from Union Reservoir Loveland, CO
Water: 50° H: 65° L: 21°
Wind 9-38 mph
Boyd Lake Clear throughout the day. 29 miles from Union Reservoir Loveland, CO
Water: 50° H: 54° L: 20°
Wind 13-50 mph
Ralph Price Reservoir (Button Rock Dam) Dangerously windy in the morning and afternoon. 29 miles from Union Reservoir Lyons, CO
Water: 54° H: 54° L: 18°
Wind 12-50 mph
Pinewood Reservoir Dangerously windy in the morning and afternoon. 30 miles from Union Reservoir Berthoud, CO
Water: 50° H: 63° L: 20°
Wind 8-28 mph
Marshall Lake Partly cloudy throughout the day. 30 miles from Union Reservoir Louisville, CO
Water: 48° H: 62° L: 21°
Wind 9-30 mph
Standley Lake Partly cloudy throughout the day. 34 miles from Union Reservoir Westminster, CO
Water: 51° H: 66° L: 20°
Wind 12-39 mph
Milton Reservoir Clear throughout the day. 35 miles from Union Reservoir Lasalle, CO
Water: 48° H: 65° L: 22°
Wind 12-36 mph
Barr Lake Partly cloudy throughout the day. 35 miles from Union Reservoir Brighton, CO
Water: 57° H: 64° L: 20°
Wind 8-27 mph
Hidden Lake Partly cloudy throughout the day. 39 miles from Union Reservoir Hidden Lake, CO
Water: 48° H: 51° L: 20°
Wind 12-41 mph
Gross Reservoir Windy in the afternoon. 39 miles from Union Reservoir Crescent, CO
Water: 41° H: 46° L: 15°
Wind 17-62 mph
Barker Meadow Reseroir Dangerously windy in the morning and afternoon. 46 miles from Union Reservoir Nederland, CO
Water: 54° H: 65° L: 21°
Wind 6-26 mph
Sloan's Lake Partly cloudy throughout the day. 47 miles from Union Reservoir Denver, CO
Water: 50° H: 60° L: 19°
Wind 11-43 mph
Horsetooth Reservoir Windy in the morning. 49 miles from Union Reservoir Fort Collins, CO
Water: 46° H: 62° L: 22°
Wind 13-43 mph
Black Hollow Reservoir Windy in the morning and afternoon. 49 miles from Union Reservoir Severance, CO
Water: 45° H: 61° L: 21°
Wind 12-42 mph
Terry Lake Windy in the morning and afternoon. 51 miles from Union Reservoir Fort Collins, CO
Water: 46° H: 60° L: 21°
Wind 15-47 mph
Douglas Reservoir Dangerously windy in the morning and afternoon. 59 miles from Union Reservoir Waverly, CO
Water: 48° H: 63° L: 19°
Wind 8-23 mph
Cherry Creek Reservoir Mostly cloudy throughout the day. 61 miles from Union Reservoir Aurora, CO