Water Temperature of the Arkansas River in Portland, CO

Current Water Temperature

45.7°F 7.6°C
Frigid Dangerously Cold
45.7°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: Wednesday, November 11, 2026, 4:30 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

64.2°F
Sunny
Conditions: Sunny
Humidity: 19%
Feels Like: 55.6°F
Wind: ESE 9.5 mph
Wind Gusts: 10.1 mph
Pressure: 30.08 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 49.9 mi
UV Index: 4.2

Five-Day Weather Forecast

Sunny
Wed
H: 66°F
L: 35°F
Overcast
Thu
H: 65°F
L: 38°F
Overcast
Fri
H: 62°F
L: 40°F
Overcast
Sat
H: 60°F
L: 41°F
Light Drizzle
Sun
H: 49°F
L: 42°F

Air Quality

EPA Index 2 • Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

PM2.5
7 μg/m³
Good
PM10
10.2 μg/m³
Good
Ozone (O3)
103 μg/m³
Photochemical
NO2
1.3 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
136 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 13m daylight
Sunrise 6:38 AM
Solar Noon 11:44 AM
Sunset 4:51 PM
Moon
New • 2%
Moonrise 9:11 AM
Transit 1:42 PM
Moonset 6:14 PM

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
1:12 PM - 3:42 PM

Minor Periods

8:41 AM - 10:11 AM
5:44 PM - 7:14 PM
Action Rating:
Good Action 3/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 49.1°F
Average Humidity: 34%
Chance of Rain: 0%
Wind: 12 mph
UV Index: 4.2

Air Quality

EPA Index 2 • Moderate
PM2.5
8.8 μg/m³
Good
PM10
11.5 μg/m³
Good
Ozone (O3)
70.1 μg/m³
Photochemical
NO2
5.6 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
152.3 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 13m daylight
Sunrise 6:38 AM
Solar Noon 11:44 AM
Sunset 4:51 PM
Moon
New • 2%
Moonrise 9:11 AM
Transit 1:42 PM
Moonset 6:14 PM

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
1:12 PM - 3:42 PM

Minor Periods

8:41 AM - 10:11 AM
5:44 PM - 7:14 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 49.6°F
Average Humidity: 31%
Chance of Rain: 0%
Wind: 7.5 mph
UV Index: 4.2

Air Quality

EPA Index 1 • Good
PM2.5
3.6 μg/m³
Good
PM10
4.4 μg/m³
Good
Ozone (O3)
70.2 μg/m³
Photochemical
NO2
5.9 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
153.7 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: 50.4°F
Average Humidity: 38%
Chance of Rain: 0%
Wind: 9.1 mph
UV Index: 3.8

Air Quality

EPA Index 1 • Good
PM2.5
4.9 μg/m³
Good
PM10
5.9 μg/m³
Good
Ozone (O3)
66.9 μg/m³
Photochemical
NO2
6.6 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
169.9 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: Overcast
Average Temperature: 49.5°F
Average Humidity: 48%
Chance of Rain: 38%
Wind: 8.9 mph
UV Index: 3.4

Air Quality

EPA Index 1 • Good
PM2.5
4.5 μg/m³
Good
PM10
4.9 μg/m³
Good
Ozone (O3)
61.8 μg/m³
Photochemical
NO2
5.2 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
169.6 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: Light Drizzle
Average Temperature: 45.1°F
Average Humidity: 81%
Chance of Rain: 19%
Wind: 12.7 mph
UV Index: 1.8

Air Quality

EPA Index 1 • Good
PM2.5
2.3 μg/m³
Good
PM10
2.4 μg/m³
Good
Ozone (O3)
51.6 μg/m³
Photochemical
NO2
5.7 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
145.3 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
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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