Water Temperature of the Arkansas River in Portland, CO

Current Water Temperature

58.1°F

Measurement Time: Saturday, April 18, 2026, 11:30 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

58.8°F
Sunny
Sunny
57.5°F
58.8°F
9%
ESE 12.3 mph
14.2 mph
57.5°F
1.2°F
0 in
2%
6 mi
1015 mbar
1.8

Five Day Weather Forecast

Sunny
Sat
H: 61°F
L: 22°F
Sunny
Sun
H: 74°F
L: 33°F
Partly Cloudy
Mon
H: 77°F
L: 42°F
Sunny
Tue
H: 79°F
L: 48°F
Sunny
Wed
H: 78°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 4.55 μg/m3
PM10: 8.45 μg/m3
Carbon Monoxide: 170.85 μg/m3
Nitrogen Dioxide: 8.45 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 96 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

Freeze Warning issued April 18 at 11:23AM MDT until April 19 at 8:00AM MDT by NWS Pueblo CO

Effective: Sat April 18, 2026, 11:23 AM
Expires: Sat April 18, 2026, 7:30 PM

* WHAT...Sub-freezing temperatures in the mid to upper 20s late tonight into Sunday morning. * WHERE...All of the southeast Colorado Plains. * WHEN...From 11 PM this evening to 8 AM MDT Sunday. * IMPACTS...Freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.
Saturday, April 18, 2026

Weather Forecast

Sunny
61°F
21.8°F
40.9°F
35%
0 in
0%
0%
12.3 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 4.41 μg/m3
PM10: 6.46 μg/m3
Carbon Monoxide: 151.53 μg/m3
Nitrogen Dioxide: 4.22 μg/m3
Sulphur Dioxide: 1.44 μg/m3
Ozone: 124.92 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
73.8°F
32.7°F
52.3°F
16%
0 in
0%
0%
15.4 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 4.87 μg/m3
PM10: 10.5 μg/m3
Carbon Monoxide: 153.09 μg/m3
Nitrogen Dioxide: 5.39 μg/m3
Sulphur Dioxide: 1.62 μg/m3
Ozone: 109.64 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

Partly Cloudy
77.4°F
42.4°F
59.1°F
15%
0 in
0%
0%
8.7 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 5.4 μg/m3
PM10: 12.1 μg/m3
Carbon Monoxide: 161.65 μg/m3
Nitrogen Dioxide: 4.71 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 103.36 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

Tuesday, April 21, 2026

Weather Forecast

Sunny
78.9°F
48.3°F
63.9°F
20%
0 in
0%
0%
14.3 mph
9.4


Air Quality

AQI: 1 - Good
PM2.5: 4.65 μg/m3
PM10: 6.9 μg/m3
Carbon Monoxide: 149.6 μg/m3
Nitrogen Dioxide: 4.15 μg/m3
Sulphur Dioxide: 1.42 μg/m3
Ozone: 99.44 μg/m3

Astronomical

Sunrise: 6:16 AM
Sun Transit: 12:58 AM
Sunset: 7:42 PM
Daylight: 13 hrs 26 mins
Moonrise: 9:16 AM
Moon Transit: 5:16 PM
Moonset: 12:13 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

2:09 AM - 4:39 AM
4:46 PM - 7:16 PM

Minor Periods

8:46 AM - 10:16 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, April 22, 2026

Weather Forecast

Sunny
77.9°F
51.1°F
64.3°F
21%
0 in
0%
0%
31.5 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 4.67 μg/m3
PM10: 6.36 μg/m3
Carbon Monoxide: 173.97 μg/m3
Nitrogen Dioxide: 6.46 μg/m3
Sulphur Dioxide: 1.36 μg/m3
Ozone: 86.08 μg/m3

Astronomical

Sunrise: 6:15 AM
Sun Transit: 12:58 AM
Sunset: 7:43 PM
Daylight: 13 hrs 29 mins
Moonrise: 10:27 AM
Moon Transit: 6:19 PM
Moonset: 1:14 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

3:13 AM - 5:43 AM
5:49 PM - 8:19 PM

Minor Periods

9:57 AM - 11:27 AM
12:44 AM - 2:14 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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