Water Temperature of the Arkansas River in Portland, CO

Current Water Temperature

70.2°F

Measurement Time: Thursday, August 7, 2025, 3:30 PM 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

84.4°F
Clear
Conditions: Clear
Humidity: 17%
Feels Like: 83.4°F
Wind: WNW 4 mph
Wind Gusts: 8.5 mph
Pressure: 30.1 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Thu
H: 99°F
L: 57°F
Partly Cloudy
Fri
H: 96°F
L: 57°F
Sunny
Sat
H: 85°F
L: 51°F
Patchy rain nearby
Sun
H: 79°F
L: 56°F
Patchy rain nearby
Mon
H: 81°F
L: 51°F

Air Quality

AQI: 2 - Moderate
PM2.5: 5.92 μg/m3
PM10: 6.48 μg/m3
Carbon Monoxide: 214.6 μg/m3
Nitrogen Dioxide: 21.46 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 41 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:05 PM
Sunset: 8:03 PM
Daylight: 13 hrs 55 mins
Moonrise: 7:28 PM
Moon Transit: 12:00 AM
Moonset: 4:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:14 AM - 11:44 AM

Minor Periods

6:58 PM - 8:28 PM
3:30 AM - 5:00 AM

Action Rating: 3 out of 5

Heat Advisory issued August 7 at 12:03PM MDT until August 7 at 8:00PM MDT by NWS Pueblo CO

Effective: Thu August 7, 2025, 12:03 PM
Expires: Thu August 7, 2025, 8:15 PM

* WHAT...High temperatures of 95 to 103 are expected. * WHERE...El Paso, Pueblo, and Canon City Vicinity/Eastern Fremont County. * WHEN...For the first Heat Advisory, until 8 PM MDT this evening. For the second Heat Advisory, from 11 AM to 8 PM MDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.


Heat Advisory issued August 7 at 12:03PM MDT until August 8 at 8:00PM MDT by NWS Pueblo CO

Effective: Thu August 7, 2025, 12:03 PM
Expires: Thu August 7, 2025, 8:15 PM

* WHAT...High temperatures of 95 to 103 are expected. * WHERE...El Paso, Pueblo, and Canon City Vicinity/Eastern Fremont County. * WHEN...For the first Heat Advisory, until 8 PM MDT this evening. For the second Heat Advisory, from 11 AM to 8 PM MDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.


Heat Advisory issued August 7 at 12:03PM MDT until August 7 at 8:00PM MDT by NWS Pueblo CO

Effective: Thu August 7, 2025, 12:03 PM
Expires: Thu August 7, 2025, 8:15 PM

* WHAT...High temperatures of 95 to 103 are expected. * WHERE...El Paso, Pueblo, and Canon City Vicinity/Eastern Fremont County. * WHEN...For the first Heat Advisory, until 8 PM MDT this evening. For the second Heat Advisory, from 11 AM to 8 PM MDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.


Heat Advisory issued August 7 at 12:03PM MDT until August 8 at 8:00PM MDT by NWS Pueblo CO

Effective: Thu August 7, 2025, 12:03 PM
Expires: Thu August 7, 2025, 8:15 PM

* WHAT...High temperatures of 95 to 103 are expected. * WHERE...El Paso, Pueblo, and Canon City Vicinity/Eastern Fremont County. * WHEN...For the first Heat Advisory, until 8 PM MDT this evening. For the second Heat Advisory, from 11 AM to 8 PM MDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.


Red Flag Warning issued August 7 at 2:02PM MDT until August 8 at 8:00PM MDT by NWS Pueblo CO

Effective: Thu August 7, 2025, 2:02 PM
Expires: Fri August 8, 2025, 6:15 AM

...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 222... The National Weather Service in Pueblo has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 11 AM to 8 PM MDT Friday. * AFFECTED AREA...Fire Weather Zone 222. * TIMING...For the first Red Flag Warning, until 8 PM MDT this evening. For the second Red Flag Warning, from 11 AM to 8 PM MDT Friday. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.

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.


Thursday, August 7, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 77.3°F
Average Humidity: 32%
Chance of Rain: 0%
Wind: 20.8 mph
UV Index: 2.4

Air Quality

AQI: 1 - Good
PM2.5: 6.86 μg/m3
PM10: 8.28 μg/m3
Carbon Monoxide: 242.2 μg/m3
Nitrogen Dioxide: 8.68 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 85.08 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:05 PM
Sunset: 8:03 PM
Daylight: 13 hrs 55 mins
Moonrise: 7:28 PM
Moon Transit: 12:00 AM
Moonset: 4:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:14 AM - 11:44 AM

Minor Periods

6:58 PM - 8:28 PM
3:30 AM - 5:00 AM

Action Rating: 3 out of 5

Friday, August 8, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 76.5°F
Average Humidity: 24%
Chance of Rain: 0%
Wind: 26.2 mph
UV Index: 2.4

Air Quality

AQI: 1 - Good
PM2.5: 6.8 μg/m3
PM10: 7.84 μg/m3
Carbon Monoxide: 219.19 μg/m3
Nitrogen Dioxide: 9.94 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 80.56 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:05 PM
Sunset: 8:02 PM
Daylight: 13 hrs 53 mins
Moonrise: 8:03 PM
Moon Transit: 12:15 AM
Moonset: 5:09 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:07 AM - 12:37 AM

Minor Periods

7:33 PM - 9:03 PM
4:39 AM - 6:09 AM

Action Rating: 5 out of 5

Saturday, August 9, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 68.7°F
Average Humidity: 47%
Chance of Rain: 0%
Wind: 19.7 mph
UV Index: 2.5

Air Quality

AQI: 1 - Good
PM2.5: 11.13 μg/m3
PM10: 12.42 μg/m3
Carbon Monoxide: 249.08 μg/m3
Nitrogen Dioxide: 9.51 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 98.12 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:05 PM
Sunset: 8:01 PM
Daylight: 13 hrs 51 mins
Moonrise: 8:33 PM
Moon Transit: 1:07 AM
Moonset: 6:20 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
10:58 AM - 1:28 PM

Minor Periods

8:03 PM - 9:33 PM
5:50 AM - 7:20 AM

Action Rating: 5 out of 5

Sunday, August 10, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 66.8°F
Average Humidity: 64%
Chance of Rain: 87%
Wind: 11.4 mph
UV Index: 1.4

Air Quality

AQI: 1 - Good
PM2.5: 12.08 μg/m3
PM10: 18.75 μg/m3
Carbon Monoxide: 253.01 μg/m3
Nitrogen Dioxide: 7.42 μg/m3
Sulphur Dioxide: 2.18 μg/m3
Ozone: 102.92 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:05 PM
Sunset: 8:00 PM
Daylight: 13 hrs 49 mins
Moonrise: 8:59 PM
Moon Transit: 1:56 AM
Moonset: 7:30 AM
Moon Phase: Full
Moon Illumination: 95.5%

Best Times for Fishing or Hunting

Major Periods

1:26 AM - 3:56 AM
11:46 AM - 2:16 PM

Minor Periods

8:29 PM - 9:59 PM
7:00 AM - 8:30 AM

Action Rating: 4 out of 5

Monday, August 11, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 65.7°F
Average Humidity: 54%
Chance of Rain: 66%
Wind: 14.3 mph
UV Index: 2.2

Air Quality

AQI: 2 - Moderate
PM2.5: 16.12 μg/m3
PM10: 19.55 μg/m3
Carbon Monoxide: 299.7 μg/m3
Nitrogen Dioxide: 8.88 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 98.46 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:05 PM
Sunset: 7:58 PM
Daylight: 13 hrs 47 mins
Moonrise: 9:24 PM
Moon Transit: 2:44 AM
Moonset: 8:41 AM
Moon Phase: Waning Gibbous
Moon Illumination: 89.6%

Best Times for Fishing or Hunting

Major Periods

2:14 AM - 4:44 AM
12:00 AM - 12:00 AM

Minor Periods

8:54 PM - 10:24 PM
8:11 AM - 9:41 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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