Water Temperature of the Arkansas River in Portland, CO

Current Water Temperature

46.9°F 8.3°C
Frigid Dangerously Cold
46.9°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

Measurement Time: Thursday, November 12, 2026, 5:30 AM MST

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

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

67.5°F
Sunny
Conditions: Sunny
Humidity: 20%
Feels Like: 59.7°F
Wind: SE 6.9 mph
Wind Gusts: 7.6 mph
Pressure: 29.92 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 47 mi
UV Index: 3.7

Five-Day Weather Forecast

Overcast
Thu
H: 68°F
L: 36°F
Overcast
Fri
H: 66°F
L: 35°F
Moderate Drizzle
Sat
H: 56°F
L: 33°F
Overcast
Sun
H: 57°F
L: 41°F
Overcast
Mon
H: 58°F
L: 37°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
5.5 μg/m³
Good
PM10
5.9 μg/m³
Good
Ozone (O3)
108 μg/m³
Photochemical
NO2
0.7 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
133 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 11m daylight
Sunrise 6:39 AM
Solar Noon 11:44 AM
Sunset 4:50 PM
Moon
Waxing Crescent • 6%
Moonrise 10:04 AM
Transit 2:34 PM
Moonset 7:06 PM

Best Times for Fishing or Hunting

Major Periods

1:38 AM - 4:08 AM
2:04 PM - 4:34 PM

Minor Periods

9:34 AM - 11:04 AM
6:36 PM - 8:06 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 49.8°F
Average Humidity: 39%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 4.3

Air Quality

EPA Index 1 • Good
PM2.5
9.3 μg/m³
Good
PM10
9.9 μg/m³
Good
Ozone (O3)
72.6 μg/m³
Photochemical
NO2
6.5 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
153.2 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 11m daylight
Sunrise 6:39 AM
Solar Noon 11:44 AM
Sunset 4:50 PM
Moon
Waxing Crescent • 6%
Moonrise 10:04 AM
Transit 2:34 PM
Moonset 7:06 PM

Best Times for Fishing or Hunting

Major Periods

1:38 AM - 4:08 AM
2:04 PM - 4:34 PM

Minor Periods

9:34 AM - 11:04 AM
6:36 PM - 8:06 PM
Action Rating:
Good Action 3/5
Friday, November 13, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 48.4°F
Average Humidity: 40%
Chance of Rain: 0%
Wind: 9.4 mph
UV Index: 3.7

Air Quality

EPA Index 2 • Moderate
PM2.5
4.5 μg/m³
Good
PM10
5 μg/m³
Good
Ozone (O3)
69.9 μg/m³
Photochemical
NO2
6.9 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
168.5 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 9m daylight
Sunrise 6:40 AM
Solar Noon 11:44 AM
Sunset 4:49 PM
Moon
Waxing Crescent • 13%
Moonrise 10:50 AM
Transit 3:24 PM
Moonset 8:03 PM

Best Times for Fishing or Hunting

Major Periods

2:30 AM - 5:00 AM
2:54 PM - 5:24 PM

Minor Periods

10:20 AM - 11:50 AM
7:33 PM - 9:03 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Moderate Drizzle
Average Temperature: 44.2°F
Average Humidity: 70%
Chance of Rain: 62%
Wind: 11.1 mph
UV Index: 3.2

Air Quality

EPA Index 1 • Good
PM2.5
3.1 μg/m³
Good
PM10
3.4 μg/m³
Good
Ozone (O3)
63.9 μg/m³
Photochemical
NO2
6.1 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
162.4 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 7m daylight
Sunrise 6:41 AM
Solar Noon 11:44 AM
Sunset 4:48 PM
Moon
Waxing Crescent • 21%
Moonrise 11:28 AM
Transit 4:13 PM
Moonset 9:03 PM

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
3:43 PM - 6:13 PM

Minor Periods

10:58 AM - 12:28 PM
8:33 PM - 10:03 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 46.9°F
Average Humidity: 70%
Chance of Rain: 16%
Wind: 10.1 mph
UV Index: 4

Air Quality

EPA Index 1 • Good
PM2.5
4.9 μg/m³
Good
PM10
5.5 μg/m³
Good
Ozone (O3)
61 μg/m³
Photochemical
NO2
4.6 μg/m³
Nitrogen Dioxide
SO2
0.2 μg/m³
Sulfur Dioxide
CO
147.4 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 5m daylight
Sunrise 6:42 AM
Solar Noon 11:44 AM
Sunset 4:47 PM
Moon
Waxing Crescent • 31%
Moonrise 12:02 PM
Transit 5:00 PM
Moonset 10:05 PM

Best Times for Fishing or Hunting

Major Periods

4:06 AM - 6:36 AM
4:30 PM - 7:00 PM

Minor Periods

11:32 AM - 1:02 PM
9:35 PM - 11:05 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 45.9°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 4

Air Quality

EPA Index 1 • Good
PM2.5
3.7 μg/m³
Good
PM10
4 μg/m³
Good
Ozone (O3)
61.2 μg/m³
Photochemical
NO2
4.4 μg/m³
Nitrogen Dioxide
SO2
0.2 μg/m³
Sulfur Dioxide
CO
159.4 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 4m daylight
Sunrise 6:43 AM
Solar Noon 11:44 AM
Sunset 4:47 PM
Moon
First Quarter • 42%
Moonrise 12:30 PM
Transit 5:44 PM
Moonset 11:06 PM

Best Times for Fishing or Hunting

Major Periods

4:52 AM - 7:22 AM
5:14 PM - 7:44 PM

Minor Periods

12:00 PM - 1:30 PM
10:36 PM - 12:06 AM
Action Rating:
Good Action 3/5
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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