Water Temperature of the Boise River in Caldwell, ID

Current Water Temperature

42.4°F

Measurement Time: Tuesday, January 13, 2026, 8:45 AM MST

Temperature Locations

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Local Points of Interest

Rotary Pond Park

Boise River

Station Name: BOISE RIVER AT CALDWELL, ID
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 2,343 feet

Nearest Address:
W Chicago Street
Caldwell, ID 83605-5407
Canyon County

GPS Coordinates: 43.67735278, -116.7011306

Nearby Water Temperatures

Boise River, Caldwell, ID (0.2 mi)
Boise River, Parma, ID (15.4 mi)
Snake River, Nyssa, OR (19.6 mi)
Snake River, King Hill, ID (88.6 mi)
Owyhee River, Bruneau, ID (98.2 mi)
Yankee Fork Salmon River, Sunbeam, ID (106.3 mi)
Meadow Creek, Stibnite, ID (106.8 mi)
East Fork South Fork Salmon River, Stibnite, ID (108.6 mi)
Sugar Creek, Yellow Pine, ID (110.1 mi)
East Fork Wallowa River, Joseph, OR (112.9 mi)
Box Canyon Springs, Wendell, ID (116.4 mi)
Briggs Spring, Buhl, ID (117.9 mi)
Snake River, Buhl, ID (122.2 mi)
Niagara Springs, Buhl, ID (123.8 mi)
Donner und Blitzen River, Frenchglen, OR (125.1 mi)

Weather for Caldwell, Idaho

Current Weather

41.4°F
Sunny
Sunny
38.1°F
41.6°F
67%
NW 4.9 mph
6 mph
41.4°F
37.2°F
0 in
0%
9 mi
1036 mbar
0.4

Five Day Weather Forecast

Partly Cloudy
Tue
H: 45°F
L: 26°F
Mist
Wed
H: 30°F
L: 28°F
Mist
Thu
H: 30°F
L: 26°F
Sunny
Fri
H: 47°F
L: 33°F
Sunny
Sat
H: 46°F
L: 33°F

Air Quality

AQI: 2 - Moderate
PM2.5: 21.55 μg/m3
PM10: 21.95 μg/m3
Carbon Monoxide: 736.85 μg/m3
Nitrogen Dioxide: 35.35 μg/m3
Sulphur Dioxide: 3.65 μg/m3
Ozone: 14 μg/m3

Astronomical

Sunrise: 8:18 AM
Sun Transit: 12:55 AM
Sunset: 5:33 PM
Daylight: 9 hrs 15 mins
Moonrise: 4:15 AM
Moon Transit: 8:44 AM
Moonset: 1:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

8:14 AM - 10:44 AM
4:57 PM - 7:27 PM

Minor Periods

12:38 AM - 2:08 PM
3:45 AM - 5:15 AM

Action Rating: 3 out of 5

Air Stagnation Advisory issued January 12 at 11:50AM MST until January 19 at 5:00AM MST by NWS Boise ID

Effective: Mon January 12, 2026, 11:50 AM
Expires: Tue January 13, 2026, 2:00 PM

* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...Until 5 AM MST /4 AM PST/ Monday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution during periods of stagnant air.
Tuesday, January 13, 2026

Weather Forecast

Partly Cloudy
44.8°F
26.2°F
31.8°F
89%
0 in
0%
0%
5.4 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 18.47 μg/m3
PM10: 19.07 μg/m3
Carbon Monoxide: 570.01 μg/m3
Nitrogen Dioxide: 26.69 μg/m3
Sulphur Dioxide: 3.47 μg/m3
Ozone: 26.72 μg/m3

Astronomical

Sunrise: 8:18 AM
Sun Transit: 12:55 AM
Sunset: 5:33 PM
Daylight: 9 hrs 15 mins
Moonrise: 4:15 AM
Moon Transit: 8:44 AM
Moonset: 1:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

8:14 AM - 10:44 AM
4:57 PM - 7:27 PM

Minor Periods

12:38 AM - 2:08 PM
3:45 AM - 5:15 AM

Action Rating: 3 out of 5

Wednesday, January 14, 2026

Weather Forecast

Mist
30.2°F
27.8°F
28.9°F
96%
0 in
0%
0%
5.8 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 18.21 μg/m3
PM10: 18.62 μg/m3
Carbon Monoxide: 471.85 μg/m3
Nitrogen Dioxide: 23.19 μg/m3
Sulphur Dioxide: 2.92 μg/m3
Ozone: 26.4 μg/m3

Astronomical

Sunrise: 8:18 AM
Sun Transit: 12:56 AM
Sunset: 5:34 PM
Daylight: 9 hrs 16 mins
Moonrise: 5:19 AM
Moon Transit: 9:33 AM
Moonset: 1:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

5:47 PM - 8:17 PM
9:03 AM - 11:33 AM

Minor Periods

1:14 PM - 2:44 PM
4:49 AM - 6:19 AM

Action Rating: 3 out of 5

Thursday, January 15, 2026

Weather Forecast

Mist
30°F
25.9°F
30°F
88%
0 in
0%
0%
5.4 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 18.21 μg/m3
PM10: 18.53 μg/m3
Carbon Monoxide: 561.45 μg/m3
Nitrogen Dioxide: 22.67 μg/m3
Sulphur Dioxide: 3.11 μg/m3
Ozone: 26.4 μg/m3

Astronomical

Sunrise: 8:17 AM
Sun Transit: 12:56 AM
Sunset: 5:36 PM
Daylight: 9 hrs 18 mins
Moonrise: 6:19 AM
Moon Transit: 10:24 AM
Moonset: 2:29 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

6:39 PM - 9:09 PM
9:54 AM - 12:24 AM

Minor Periods

1:59 PM - 3:29 PM
5:49 AM - 7:19 AM

Action Rating: 2 out of 5

Friday, January 16, 2026

Weather Forecast

Sunny
47.2°F
33.1°F
39°F
60%
0 in
0%
0%
8.7 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 13.57 μg/m3
PM10: 13.71 μg/m3
Carbon Monoxide: 428.89 μg/m3
Nitrogen Dioxide: 19.4 μg/m3
Sulphur Dioxide: 2.48 μg/m3
Ozone: 32.2 μg/m3

Astronomical

Sunrise: 8:17 AM
Sun Transit: 12:56 AM
Sunset: 5:37 PM
Daylight: 9 hrs 20 mins
Moonrise: 7:12 AM
Moon Transit: 11:16 AM
Moonset: 3:23 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

7:31 PM - 10:01 PM
10:46 AM - 1:16 PM

Minor Periods

2:53 PM - 4:23 PM
6:42 AM - 8:12 AM

Action Rating: 3 out of 5

Saturday, January 17, 2026

Weather Forecast

Sunny
46.1°F
32.6°F
37.6°F
63%
0 in
0%
0%
5.1 mph
0


Air Quality

AQI: 2 - Moderate
PM2.5: 15.57 μg/m3
PM10: 15.8 μg/m3
Carbon Monoxide: 379.99 μg/m3
Nitrogen Dioxide: 28.05 μg/m3
Sulphur Dioxide: 2.97 μg/m3
Ozone: 29.23 μg/m3

Astronomical

Sunrise: 8:16 AM
Sun Transit: 12:57 AM
Sunset: 5:38 PM
Daylight: 9 hrs 22 mins
Moonrise: 7:58 AM
Moon Transit: 12:09 AM
Moonset: 4:26 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

8:24 PM - 10:54 PM
11:39 AM - 2:09 PM

Minor Periods

3:56 PM - 5:26 PM
7:28 AM - 8:58 AM

Action Rating: 4 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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