Water Temperature of the Boise River in Caldwell, ID

Current Water Temperature

40.3°F

Measurement Time: Friday, January 23, 2026, 12:45 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

28°F
Overcast
Overcast
26.1°F
29.2°F
85%
WNW 2.2 mph
2.7 mph
22.9°F
24.2°F
0 in
100%
9 mi
1021 mbar
0.2

Five Day Weather Forecast

Overcast
Fri
H: 35°F
L: 22°F
Mist
Sat
H: 33°F
L: 19°F
Cloudy
Sun
H: 33°F
L: 13°F
Cloudy
Mon
H: 41°F
L: 23°F
Sunny
Tue
H: 45°F
L: 29°F

Air Quality

AQI: 1 - Good
PM2.5: 5.25 μg/m3
PM10: 5.75 μg/m3
Carbon Monoxide: 205.85 μg/m3
Nitrogen Dioxide: 3.05 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 8:12 AM
Sun Transit: 12:58 AM
Sunset: 5:46 PM
Daylight: 9 hrs 34 mins
Moonrise: 10:30 AM
Moon Transit: 7:54 AM
Moonset: 11:26 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

7:24 AM - 9:54 AM
12:18 AM - 2:48 AM

Minor Periods

12:00 AM - 12:00 AM
10:00 AM - 11:30 AM

Action Rating: 2 out of 5

Air Stagnation Advisory issued January 22 at 1:35PM MST until January 23 at 5:00AM MST by NWS Boise ID

Effective: Thu January 22, 2026, 1:35 PM
Expires: Fri January 23, 2026, 5:00 AM

* 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/ Friday. * 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.


Air Stagnation Advisory issued January 23 at 4:56AM MST until January 23 at 12:00PM MST by NWS Boise ID

Effective: Fri January 23, 2026, 4:56 AM
Expires: Fri January 23, 2026, 12:00 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 noon MST /11 AM PST/ today. * 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.
Friday, January 23, 2026

Weather Forecast

Overcast
35.1°F
22.3°F
30.3°F
82%
0 in
0%
0%
8.7 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 9.09 μg/m3
PM10: 9.43 μg/m3
Carbon Monoxide: 472.53 μg/m3
Nitrogen Dioxide: 20.72 μg/m3
Sulphur Dioxide: 2.73 μg/m3
Ozone: 35.72 μg/m3

Astronomical

Sunrise: 8:12 AM
Sun Transit: 12:58 AM
Sunset: 5:46 PM
Daylight: 9 hrs 34 mins
Moonrise: 10:30 AM
Moon Transit: 7:54 AM
Moonset: 11:26 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

7:24 AM - 9:54 AM
12:18 AM - 2:48 AM

Minor Periods

12:00 AM - 12:00 AM
10:00 AM - 11:30 AM

Action Rating: 2 out of 5

Saturday, January 24, 2026

Weather Forecast

Mist
33.4°F
18.7°F
23.8°F
86%
0 in
0%
0%
7.8 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 5.64 μg/m3
PM10: 5.97 μg/m3
Carbon Monoxide: 241.25 μg/m3
Nitrogen Dioxide: 6.19 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 56.52 μg/m3

Astronomical

Sunrise: 8:11 AM
Sun Transit: 12:58 AM
Sunset: 5:47 PM
Daylight: 9 hrs 36 mins
Moonrise: 10:50 AM
Moon Transit: 5:37 PM
Moonset: 12:26 AM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

1:03 AM - 3:33 AM
5:07 PM - 7:37 PM

Minor Periods

10:20 AM - 11:50 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, January 25, 2026

Weather Forecast

Cloudy
32.5°F
13.1°F
22.9°F
86%
0 in
0%
0%
6.5 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 9.09 μg/m3
PM10: 10.01 μg/m3
Carbon Monoxide: 361.49 μg/m3
Nitrogen Dioxide: 17.55 μg/m3
Sulphur Dioxide: 2.41 μg/m3
Ozone: 39.6 μg/m3

Astronomical

Sunrise: 8:10 AM
Sun Transit: 1:00 PM
Sunset: 5:49 PM
Daylight: 9 hrs 38 mins
Moonrise: 11:13 AM
Moon Transit: 6:27 PM
Moonset: 12:41 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

1:51 AM - 4:21 AM
5:57 PM - 8:27 PM

Minor Periods

10:43 AM - 12:13 AM
12:11 AM - 1:41 AM

Action Rating: 3 out of 5

Monday, January 26, 2026

Weather Forecast

Cloudy
41°F
22.5°F
29.6°F
65%
0 in
0%
0%
6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 8.5 μg/m3
PM10: 9.25 μg/m3
Carbon Monoxide: 305.62 μg/m3
Nitrogen Dioxide: 20.77 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 32.96 μg/m3

Astronomical

Sunrise: 8:09 AM
Sun Transit: 1:00 PM
Sunset: 5:50 PM
Daylight: 9 hrs 41 mins
Moonrise: 11:40 AM
Moon Transit: 7:21 PM
Moonset: 1:57 AM
Moon Phase: First Quarter
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

2:42 AM - 5:12 AM
6:51 PM - 9:21 PM

Minor Periods

11:10 AM - 12:40 AM
1:27 AM - 2:57 AM

Action Rating: 2 out of 5

Tuesday, January 27, 2026

Weather Forecast

Sunny
44.7°F
28.7°F
34.7°F
51%
0 in
0%
0%
3.6 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 11.26 μg/m3
PM10: 12.05 μg/m3
Carbon Monoxide: 327.88 μg/m3
Nitrogen Dioxide: 22.42 μg/m3
Sulphur Dioxide: 2.27 μg/m3
Ozone: 23.31 μg/m3

Astronomical

Sunrise: 8:08 AM
Sun Transit: 1:00 PM
Sunset: 5:51 PM
Daylight: 9 hrs 43 mins
Moonrise: 12:16 AM
Moon Transit: 8:20 PM
Moonset: 3:17 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

3:37 AM - 6:07 AM
7:50 PM - 10:20 PM

Minor Periods

11:46 AM - 1:16 PM
2:47 AM - 4:17 AM

Action Rating: 2 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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