Water Temperature of the Arkansas River in Portland, CO

Current Water Temperature

43.5°F

Measurement Time: Sunday, January 4, 2026, 11:30 AM MST

Temperature Locations

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Local Points of Interest

Florence, CO; Penrose, CO

Arkansas River

Station Name: ARKANSAS RIVER AT PORTLAND, CO.
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 5,043 feet

Nearest Address:
State Hwy 120
Portland, CO 81226
Fremont County

GPS Coordinates: 38.38833418, -105.0160961

Nearby Water Temperatures

Arkansas River, Cañon City, CO (13.4 mi)
Fountain Creek, Pueblo, CO (23.5 mi)
Fountain Creek, Fountain, CO (23.8 mi)
Arkansas River, Pueblo, CO (24.1 mi)
Arkansas River, Pueblo, CO (24.3 mi)
Arkansas River, Avondale, CO (34.8 mi)
Arkansas River, Manzanola, CO (62.6 mi)
South Platte River, Roxborough Park, CO (71.4 mi)
Arkansas River, Rocky Ford, CO (75.6 mi)
Arkansas River, Granite, CO (81.1 mi)
South Platte River, Englewood, CO (88.2 mi)
Halfmoon Creek, Twin Lakes, CO (91.7 mi)
Purgatoire River, Trinchera, CO (93.7 mi)
Purgatoire River, Kim, CO (94 mi)
South Platte River, Denver, CO (98.4 mi)

Weather for Portland, Colorado

Current Weather

55.8°F
Clear
Clear
55.2°F
43.6°F
12%
WSW 4.5 mph
9.4 mph
38.9°F
29.9°F
0 in
0%
9 mi
1010 mbar
0

Five Day Weather Forecast

Sunny
Sun
H: 64°F
L: 33°F
Sunny
Mon
H: 53°F
L: 31°F
Sunny
Tue
H: 52°F
L: 31°F
Sunny
Wed
H: 56°F
L: 26°F
Patchy rain nearby
Thu
H: 40°F
L: 31°F

Air Quality

AQI: 1 - Good
PM2.5: 5.65 μg/m3
PM10: 5.75 μg/m3
Carbon Monoxide: 133.85 μg/m3
Nitrogen Dioxide: 7.85 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:05 AM
Sunset: 4:53 PM
Daylight: 9 hrs 36 mins
Moonrise: 6:32 PM
Moon Transit: 1:01 AM
Moonset: 8:38 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:31 AM - 3:01 AM
10:55 AM - 1:25 PM

Minor Periods

6:02 PM - 7:32 PM
8:08 AM - 9:38 AM

Action Rating: 3 out of 5

Red Flag Warning issued January 4 at 2:40AM MST until January 4 at 5:00PM MST by NWS Pueblo CO

Effective: Sun January 4, 2026, 2:40 AM
Expires: Sun January 4, 2026, 5:00 PM

...A Red Flag Warning is in effect for portions of the area from 10 AM through 5 PM Sunday... ...A Fire Weather Watch has been issued for portions of the area from late Monday Morning through Monday afternoon... * AFFECTED AREA...Fire Weather Zones 221, 222, 226, 227 and 228. * WINDS...Southwest 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.


Red Flag Warning issued January 4 at 4:55PM MST until January 5 at 5:00PM MST by NWS Pueblo CO

Effective: Sun January 4, 2026, 4:55 PM
Expires: Mon January 5, 2026, 9:00 AM

...A Red Flag Warning for portions of the area will expire at 5 PM Sunday... ...A Red Flag Warning is in effect for portions of the area from 10 AM through 5 PM Monday... ...RED FLAG WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 228... * AFFECTED AREA...Fire Weather Zones 228 and 229. * WINDS...West 15 to 25 mph with gusts up to 40 mph are expected late Monday through the late Monday afternoon. * RELATIVE HUMIDITY...As low as 12 percent on Monday. * IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
Sunday, January 4, 2026

Weather Forecast

Sunny
64°F
33.4°F
43.9°F
52%
0 in
0%
0%
13.6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.61 μg/m3
PM10: 3.78 μg/m3
Carbon Monoxide: 142.13 μg/m3
Nitrogen Dioxide: 5.47 μg/m3
Sulphur Dioxide: 1.33 μg/m3
Ozone: 72.8 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:05 AM
Sunset: 4:53 PM
Daylight: 9 hrs 36 mins
Moonrise: 6:32 PM
Moon Transit: 1:01 AM
Moonset: 8:38 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:31 AM - 3:01 AM
10:55 AM - 1:25 PM

Minor Periods

6:02 PM - 7:32 PM
8:08 AM - 9:38 AM

Action Rating: 3 out of 5

Monday, January 5, 2026

Weather Forecast

Sunny
52.5°F
30.6°F
39.4°F
62%
0 in
0%
0%
22.1 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.94 μg/m3
PM10: 5.13 μg/m3
Carbon Monoxide: 134.89 μg/m3
Nitrogen Dioxide: 6.33 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 76.32 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:05 AM
Sunset: 4:54 PM
Daylight: 9 hrs 37 mins
Moonrise: 7:45 PM
Moon Transit: 1:58 AM
Moonset: 9:14 AM
Moon Phase: Full
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

1:28 AM - 3:58 AM
11:51 AM - 2:21 PM

Minor Periods

7:15 PM - 8:45 PM
8:44 AM - 10:14 AM

Action Rating: 3 out of 5

Tuesday, January 6, 2026

Weather Forecast

Sunny
52.2°F
30.8°F
38.9°F
47%
0 in
0%
0%
16.1 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.13 μg/m3
PM10: 2.25 μg/m3
Carbon Monoxide: 135.89 μg/m3
Nitrogen Dioxide: 3.19 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 86.72 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:06 AM
Sunset: 4:55 PM
Daylight: 9 hrs 38 mins
Moonrise: 8:55 PM
Moon Transit: 2:50 AM
Moonset: 9:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:20 AM - 4:50 AM
12:40 AM - 3:10 PM

Minor Periods

8:25 PM - 9:55 PM
9:13 AM - 10:43 AM

Action Rating: 2 out of 5

Wednesday, January 7, 2026

Weather Forecast

Sunny
55.6°F
26.1°F
36.4°F
32%
0 in
0%
0%
10.7 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.14 μg/m3
PM10: 3.36 μg/m3
Carbon Monoxide: 140.47 μg/m3
Nitrogen Dioxide: 4.99 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 81.52 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:06 AM
Sunset: 4:56 PM
Daylight: 9 hrs 39 mins
Moonrise: 10:01 PM
Moon Transit: 3:37 AM
Moonset: 10:09 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

3:07 AM - 5:37 AM
1:26 PM - 3:56 PM

Minor Periods

9:31 PM - 11:01 PM
9:39 AM - 11:09 AM

Action Rating: 2 out of 5

Thursday, January 8, 2026

Weather Forecast

Patchy rain nearby
39.7°F
30.6°F
34.1°F
57%
0.11 in
85%
12%
9.2 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 4 μg/m3
PM10: 4.13 μg/m3
Carbon Monoxide: 172.53 μg/m3
Nitrogen Dioxide: 7.88 μg/m3
Sulphur Dioxide: 1.46 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:06 AM
Sunset: 4:57 PM
Daylight: 9 hrs 40 mins
Moonrise: 11:03 PM
Moon Transit: 4:21 AM
Moonset: 10:32 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

3:51 AM - 6:21 AM
2:08 PM - 4:38 PM

Minor Periods

12:00 AM - 12:00 AM
10:02 AM - 11:32 AM

Action Rating: 3 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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