Water Temperature of the Arkansas River in Portland, CO

Current Water Temperature

64.4°F

Measurement Time: Thursday, April 16, 2026, 10:30 AM MDT

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

75.7°F
Sunny
Sunny
74°F
74°F
14%
SW 19.2 mph
22.1 mph
75.7°F
23.5°F
0 in
0%
6 mi
1000 mbar
3.6

Five Day Weather Forecast

Sunny
Thu
H: 77°F
L: 35°F
Partly Cloudy
Fri
H: 54°F
L: 28°F
Sunny
Sat
H: 58°F
L: 17°F
Sunny
Sun
H: 72°F
L: 23°F
Patchy rain nearby
Mon
H: 75°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 3.05 μg/m3
PM10: 6.05 μg/m3
Carbon Monoxide: 153.85 μg/m3
Nitrogen Dioxide: 3.45 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 118 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:00 PM
Sunset: 7:37 PM
Daylight: 13 hrs 15 mins
Moonrise: 5:40 AM
Moon Transit: 12:17 AM
Moonset: 7:07 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:47 AM - 2:17 PM

Minor Periods

6:37 PM - 8:07 PM
5:10 AM - 6:40 AM

Action Rating: 5 out of 5

Freeze Watch issued April 16 at 1:38AM MDT until April 18 at 8:00AM MDT by NWS Pueblo CO

Effective: Thu April 16, 2026, 1:38 AM
Expires: Thu April 16, 2026, 11:00 AM

* WHAT...Widespread temperatures in the 20s are expected by Saturday morning with teens across Monument Hill. * WHERE...All of the Southeast CO Plains. * WHEN...From late Friday night through Saturday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Red Flag Warning issued April 16 at 1:08AM MDT until April 16 at 11:00PM MDT by NWS Pueblo CO

Effective: Thu April 16, 2026, 1:08 AM
Expires: Thu April 16, 2026, 5:15 PM

* AFFECTED AREA...Fire Weather Zones 220, 221, 222, 224, 225, 226, 227, 228, 229, 231, 232, 234, 235 and 236. * TIMING...From 11 AM this morning to 11 PM MDT this evening. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph across the plains and up to 60 mph across the high country. * RELATIVE HUMIDITY...As low as 12 percent across the mountains and as low as 7 percent across the plains. * IMPACTS...Elevated fire danger is expected. Fires will catch and spread rapidly and erratically.

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.


Freeze Watch issued April 16 at 10:36AM MDT until April 18 at 8:00AM MDT by NWS Pueblo CO

Effective: Thu April 16, 2026, 10:36 AM
Expires: Thu April 16, 2026, 6:45 PM

* WHAT...Widespread temperatures in the 20s are expected by Saturday morning with teens across Monument Hill. * WHERE...Portions of central, east central, and southeast Colorado. * WHEN...From late Friday night through Saturday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.
Thursday, April 16, 2026

Weather Forecast

Sunny
76.8°F
34.7°F
56.1°F
30%
0 in
0%
0%
27.1 mph
1.9


Air Quality

AQI: 1 - Good
PM2.5: 4.16 μg/m3
PM10: 8.87 μg/m3
Carbon Monoxide: 138.93 μg/m3
Nitrogen Dioxide: 3.55 μg/m3
Sulphur Dioxide: 1.24 μg/m3
Ozone: 98.24 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:00 PM
Sunset: 7:37 PM
Daylight: 13 hrs 15 mins
Moonrise: 5:40 AM
Moon Transit: 12:17 AM
Moonset: 7:07 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:47 AM - 2:17 PM

Minor Periods

6:37 PM - 8:07 PM
5:10 AM - 6:40 AM

Action Rating: 5 out of 5

Friday, April 17, 2026

Weather Forecast

Partly Cloudy
54°F
28°F
40.3°F
53%
0 in
0%
0%
17.2 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 3.37 μg/m3
PM10: 6.91 μg/m3
Carbon Monoxide: 145.33 μg/m3
Nitrogen Dioxide: 3.06 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 116.08 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 1:00 PM
Sunset: 7:38 PM
Daylight: 13 hrs 17 mins
Moonrise: 6:09 AM
Moon Transit: 1:09 PM
Moonset: 8:24 PM
Moon Phase: New
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:39 AM - 3:09 PM

Minor Periods

7:54 PM - 9:24 PM
5:39 AM - 7:09 AM

Action Rating: 4 out of 5

Saturday, April 18, 2026

Weather Forecast

Sunny
57.7°F
16.9°F
39.7°F
35%
0 in
0%
0%
13 mph
1.9


Air Quality

AQI: 1 - Good
PM2.5: 3.05 μg/m3
PM10: 4.44 μg/m3
Carbon Monoxide: 152.77 μg/m3
Nitrogen Dioxide: 3.53 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 129.32 μg/m3

Astronomical

Sunrise: 6:20 AM
Sun Transit: 1:00 PM
Sunset: 7:39 PM
Daylight: 13 hrs 19 mins
Moonrise: 6:43 AM
Moon Transit: 2:06 PM
Moonset: 9:42 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:36 PM - 4:06 PM

Minor Periods

9:12 PM - 10:42 PM
6:13 AM - 7:43 AM

Action Rating: 4 out of 5

Sunday, April 19, 2026

Weather Forecast

Sunny
72.3°F
22.5°F
49.9°F
17%
0 in
0%
0%
13.2 mph
2.2


Air Quality

AQI: 1 - Good
PM2.5: 4.08 μg/m3
PM10: 10.12 μg/m3
Carbon Monoxide: 151.01 μg/m3
Nitrogen Dioxide: 5.27 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 105.88 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:00 PM
Sunset: 7:40 PM
Daylight: 13 hrs 22 mins
Moonrise: 7:23 AM
Moon Transit: 3:07 PM
Moonset: 11:00 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
2:37 PM - 5:07 PM

Minor Periods

12:00 AM - 12:00 AM
6:53 AM - 8:23 AM

Action Rating: 2 out of 5

Monday, April 20, 2026

Weather Forecast

Patchy rain nearby
75.4°F
44.4°F
59.1°F
23%
0.01 in
77%
0%
13.4 mph
1.9


Air Quality

AQI: 1 - Good
PM2.5: 5.27 μg/m3
PM10: 11.72 μg/m3
Carbon Monoxide: 182.31 μg/m3
Nitrogen Dioxide: 6.55 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 90.92 μg/m3

Astronomical

Sunrise: 6:17 AM
Sun Transit: 12:58 AM
Sunset: 7:41 PM
Daylight: 13 hrs 24 mins
Moonrise: 8:15 AM
Moon Transit: 4:11 PM
Moonset: 12:00 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

1:04 AM - 3:34 AM
3:41 PM - 6:11 PM

Minor Periods

7:45 AM - 9:15 AM
12:00 AM - 12:00 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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