Water Temperature of the Arkansas River in Portland, CO

Current Water Temperature

58.8°F

Measurement Time: Thursday, September 18, 2025, 12:30 AM MDT

Temperature Locations

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Local Points of Interest

Florence, CO; Penrose, CO

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Arkansas River

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

Elevation Above Sea Level: 5,043 feet / 1,537 meters

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 (94.0 mi)
South Platte River, Denver, CO (98.4 mi)

Weather for Portland, Colorado

Current Weather

47.7°F
Mist
Conditions: Mist
Humidity: 86%
Feels Like: 46.7°F
Wind: W 3.4 mph
Wind Gusts: 5.1 mph
Pressure: 30.23 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Partly Cloudy
Thu
H: 71°F
L: 53°F
Partly Cloudy
Fri
H: 79°F
L: 42°F
Partly Cloudy
Sat
H: 84°F
L: 53°F
Sunny
Sun
H: 84°F
L: 52°F
Sunny
Mon
H: 84°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 7.22 μg/m3
PM10: 9.25 μg/m3
Carbon Monoxide: 242.35 μg/m3
Nitrogen Dioxide: 0.93 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 133 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:54 AM
Sunset: 7:03 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:22 AM
Moon Transit: 10:39 AM
Moonset: 5:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

8:28 PM - 10:58 PM
10:09 AM - 12:39 AM

Minor Periods

5:14 PM - 6:44 PM
2:52 AM - 4:22 AM

Action Rating: 3 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 60.7°F
Average Humidity: 68%
Chance of Rain: 0%
Wind: 10.7 mph
UV Index: 1.9

Air Quality

AQI: 1 - Good
PM2.5: 11.89 μg/m3
PM10: 13.93 μg/m3
Carbon Monoxide: 258.93 μg/m3
Nitrogen Dioxide: 8.88 μg/m3
Sulphur Dioxide: 2.23 μg/m3
Ozone: 102.48 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:54 AM
Sunset: 7:03 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:22 AM
Moon Transit: 10:39 AM
Moonset: 5:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

8:28 PM - 10:58 PM
10:09 AM - 12:39 AM

Minor Periods

5:14 PM - 6:44 PM
2:52 AM - 4:22 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 62.3°F
Average Humidity: 52%
Chance of Rain: 0%
Wind: 9.4 mph
UV Index: 1.9

Air Quality

AQI: 1 - Good
PM2.5: 9.46 μg/m3
PM10: 11.08 μg/m3
Carbon Monoxide: 278.54 μg/m3
Nitrogen Dioxide: 9.13 μg/m3
Sulphur Dioxide: 2.09 μg/m3
Ozone: 99.68 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:53 AM
Sunset: 7:01 PM
Daylight: 12 hrs 15 mins
Moonrise: 4:30 AM
Moon Transit: 11:25 AM
Moonset: 6:10 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

9:13 PM - 11:43 PM
10:55 AM - 1:25 PM

Minor Periods

5:40 PM - 7:10 PM
4:00 AM - 5:30 AM

Action Rating: 3 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 66.3°F
Average Humidity: 46%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 1.7

Air Quality

AQI: 1 - Good
PM2.5: 6.2 μg/m3
PM10: 8.07 μg/m3
Carbon Monoxide: 271.8 μg/m3
Nitrogen Dioxide: 10.96 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 87.6 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:53 AM
Sunset: 7:00 PM
Daylight: 12 hrs 13 mins
Moonrise: 5:34 AM
Moon Transit: 12:08 AM
Moonset: 6:32 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:38 AM - 2:08 PM

Minor Periods

6:02 PM - 7:32 PM
5:04 AM - 6:34 AM

Action Rating: 3 out of 5

Sunday, September 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 65.5°F
Average Humidity: 37%
Chance of Rain: 0%
Wind: 14.1 mph
UV Index: 1.5

Air Quality

AQI: 1 - Good
PM2.5: 4.46 μg/m3
PM10: 5.29 μg/m3
Carbon Monoxide: 247.09 μg/m3
Nitrogen Dioxide: 8.9 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 77.24 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:52 AM
Sunset: 6:58 PM
Daylight: 12 hrs 11 mins
Moonrise: 6:36 AM
Moon Transit: 12:49 AM
Moonset: 6:53 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:19 AM - 2:49 PM

Minor Periods

6:23 PM - 7:53 PM
6:06 AM - 7:36 AM

Action Rating: 3 out of 5

Monday, September 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 66.7°F
Average Humidity: 31%
Chance of Rain: 0%
Wind: 19 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.23 μg/m3
PM10: 5.07 μg/m3
Carbon Monoxide: 290.45 μg/m3
Nitrogen Dioxide: 17.95 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 55.23 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:52 AM
Sunset: 6:57 PM
Daylight: 12 hrs 8 mins
Moonrise: 7:36 AM
Moon Transit: 1:30 PM
Moonset: 7:14 PM
Moon Phase: New
Moon Illumination: 2.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:00 PM - 3:30 PM

Minor Periods

6:44 PM - 8:14 PM
7:06 AM - 8:36 AM

Action Rating: 5 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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