Tualatin River near Dilley
4.7 mi- Level
- 11.0 ft
- Flow
- 147 cfs
Forecast peak 11.2 ft Mon 11 AM
Reading from Fri 11 PM · NWS gauge page
Appearance
Ends in 9 h 23 min
Issued for this forecast zone · National Weather Service Portland OR
What
Temperatures of 33 to 36 degrees will result in frost formation.
Impacts
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Precautionary actions
Take steps now to protect tender outdoor plants from the cold. Consider temporarily moving outdoor potted plants indoors if they are sensitive to cold temperatures, or temporarily covering sensitive plants with a lightweight cotton fabric (i.e., bedsheets, thin blankets), as this will help retain heat and provide frost protection for your plants.
Areas: Clatsop County Coast; Tillamook County Coast; Central Coast of Oregon; Central Oregon Coast Range Lowlands; Central Oregon Coast Range; Lower Columbia River; Tualatin Valley; Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; West Columbia River Gorge of Oregon above 500 ft; Clackamas County Cascade Foothills; Willapa Hills; Cowlitz County Lowlands; North Clark County Lowlands; Inner Vancouver Metro; East Clark County Lowlands; South Washington Cascade Foothills
See it on weather.gov (opens in a new tab)Observed 12:10 AM PDT at KHIO
Clear and 37°3°.
Today: low 34°1° (likely 34°1° to 38°3°), high 61°16° (likely 57°14° to 64°18°).
Now 37°3°
Clear
No precipitation expected in the next 2 hours.
From forecast models
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 12a | Mostly clear | 41°5° (likely 38°3° to 42°6°) | 41°5° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 93% | 20% | 0 |
| Sat 1a | Fog | 40°4° (likely 38°3° to 41°5°) | 40°4° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 95% | 49% | 0 |
| Sat 2a | Fog | 39°4° (likely 37°3° to 41°5°) | 39°4° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 97% | 74% | 0 |
| Sat 3a | Fog | 38°3° (likely 36°2° to 40°4°) | 38°3° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 99% | 73% | 0 |
| Sat 4a | Fog | 36°2° (likely 36°2° to 39°4°) | 36°2° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 99% | 73% | 0 |
| Sat 5a | Fog | 36°2° (likely 36°2° to 39°4°) | 36°2° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 100% | 72% | 0 |
| Sat 6a | Fog | 35°2° (likely 35°2° to 39°4°) | 35°2° | 0% | 0 mph0 km/h, gusts 3 mph4 km/h | 100% | 79% | 0 |
| Sat 7a | Fog | 34°1° (likely 34°1° to 39°4°) | 34°1° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 100% | 80% | 0 |
| Sat 8a | Fog | 35°2° (likely 35°2° to 39°4°) | 35°2° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 100% | 83% | 0 |
| Sat 9a | Fog | 37°3° (likely 37°3° to 42°6°) | 37°3° | 0% | 0 mph0 km/h, gusts 1 mph2 km/h | 100% | 83% | 0 |
| Sat 10a | Cloudy | 44°7° (likely 43°6° to 46°8°) | 44°7° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 92% | 82% | 1 |
| Sat 11a | Cloudy | 49°9° (likely 47°8° to 52°11°) | 49°9° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 79% | 82% | 2 |
| Sat 12p | Cloudy | 53°12° (likely 50°10° to 56°13°) | 53°12° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 66% | 79% | 3 |
| Sat 1p | Cloudy | 57°14° (likely 53°12° to 59°15°) | 57°14° | 0% | 0 mph0 km/h, gusts 3 mph6 km/h | 59% | 81% | 3 |
| Sat 2p | Cloudy | 59°15° (likely 56°13° to 62°17°) | 59°15° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 52% | 81% | 3 |
| Sat 3p | Cloudy | 60°16° (likely 57°14° to 63°17°) | 60°16° | 0% | 0 mph0 km/h, gusts 3 mph4 km/h | 48% | 82% | 2 |
| Sat 4p | Cloudy | 61°16° (likely 57°14° to 64°18°) | 61°16° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 45% | 82% | 2 |
| Sat 5p | Cloudy | 59°15° (likely 56°13° to 64°18°) | 59°15° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 47% | 83% | 1 |
| Sat 6p | Cloudy | 57°14° (likely 53°12° to 59°15°) | 57°14° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 53% | 83% | 0 |
| Sat 7p | Cloudy | 54°12° (likely 51°11° to 55°13°) | 54°12° | 0% | 0 mph0 km/h, gusts 3 mph4 km/h | 62% | 88% | 0 |
| Sat 8p | Cloudy | 50°10° (likely 49°9° to 52°11°) | 50°10° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 67% | 91% | 0 |
| Sat 9p | Cloudy | 48°9° (likely 48°9° to 50°10°) | 48°9° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 73% | 82% | 0 |
| Sat 10p | Cloudy | 46°8° (likely 46°8° to 48°9°) | 46°8° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 76% | 81% | 0 |
| Sat 11p | Cloudy | 45°7° (likely 45°7° to 47°8°) | 45°7° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 80% | 80% | 0 |
| Sun 12a | Cloudy | 43°6° (likely 43°6° to 46°8°) | 43°6° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 84% | 76% | 0 |
| Sun 1a | Cloudy | 42°6° (likely 42°6° to 45°7°) | 42°6° | 0% | 0 mph0 km/h, gusts 3 mph4 km/h | 86% | 70% | 0 |
| Sun 2a | Mostly cloudy | 41°5° (likely 41°5° to 44°7°) | 41°5° | 5% | 0 mph0 km/h, gusts 2 mph4 km/h | 88% | 63% | 0 |
| Sun 3a | Cloudy | 39°4° (likely 39°4° to 43°6°) | 39°4° | 5% | 0 mph0 km/h, gusts 3 mph5 km/h | 91% | 68% | 0 |
| Sun 4a | Cloudy | 39°4° (likely 39°4° to 42°6°) | 39°4° | 5% | 0 mph0 km/h, gusts 3 mph5 km/h | 91% | 72% | 0 |
| Sun 5a | Cloudy | 38°3° (likely 38°3° to 42°6°) | 38°3° | 50%, 0.09 in2.3 mm | 0 mph0 km/h, gusts 3 mph5 km/h | 93% | 82% | 0 |
| Sun 6a | Cloudy | 37°3° (likely 37°3° to 42°6°) | 37°3° | 60%, 0.09 in2.3 mm | 0 mph0 km/h, gusts 3 mph5 km/h | 97% | 92% | 0 |
| Sun 7a | Cloudy | 37°3° (likely 36°2° to 44°7°) | 37°3° | 30%, 0.09 in2.3 mm | 0 mph0 km/h, gusts 3 mph5 km/h | 98% | 96% | 0 |
| Sun 8a | Rain | 37°3° (likely 35°2° to 45°7°) | 37°3° | 40%, 0.09 in2.3 mm | 0 mph0 km/h, gusts 2 mph3 km/h | 99% | 98% | 0 |
| Sun 9a | Rain | 38°3° (likely 38°3° to 46°8°) | 38°3° | 40%, 0.09 in2.3 mm | 0 mph0 km/h, gusts 2 mph3 km/h | 100% | 100% | 0 |
| Sun 10a | Rain | 45°7° (likely 44°7° to 47°8°) | 45°7° | 50%, 0.09 in2.3 mm | 0 mph0 km/h, gusts 9 mph14 km/h | 93% | 100% | 1 |
| Sun 11a | Rain | 49°9° (likely 45°7° to 55°13°) | 49°9° | 60%, 0.16 in4.1 mm | 1 mph2 km/h from SSE, gusts 11 mph17 km/h | 83% | 100% | 2 |
| Sun 12p | Rain | 52°11° (likely 46°8° to 58°14°) | 52°11° | 70%, 0.16 in4.1 mm | 1 mph2 km/h from SSE, gusts 11 mph17 km/h | 77% | 100% | 3 |
| Sun 1p | Rain | 55°13° (likely 47°8° to 59°15°) | 55°13° | 80%, 0.16 in4.1 mm | 1 mph2 km/h from SSE, gusts 11 mph18 km/h | 74% | 100% | 2 |
| Sun 2p | Rain | 56°13° (likely 48°9° to 58°14°) | 56°13° | 70%, 0.16 in4.1 mm | 2 mph3 km/h from SE, gusts 13 mph21 km/h | 71% | 100% | 2 |
| Sun 3p | Cloudy | 57°14° (likely 49°9° to 57°14°) | 57°14° | 70%, 0.16 in4.1 mm | 2 mph3 km/h from SE, gusts 15 mph24 km/h | 68% | 97% | 2 |
| Sun 4p | Rain | 58°14° (likely 50°10° to 58°14°) | 58°14° | 70%, 0.16 in4.1 mm | 2 mph3 km/h from SE, gusts 17 mph28 km/h | 67% | 96% | 1 |
| Sun 5p | Cloudy | 57°14° (likely 49°9° to 57°14°) | 57°14° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from SE, gusts 12 mph19 km/h | 69% | 88% | 0 |
| Sun 6p | Rain | 56°13° (likely 48°9° to 56°13°) | 56°13° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from SE, gusts 6 mph10 km/h | 72% | 91% | 0 |
| Sun 7p | Rain | 54°12° (likely 49°9° to 54°12°) | 54°12° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from SE, gusts 6 mph9 km/h | 77% | 89% | 0 |
| Sun 8p | Rain | 52°11° (likely 50°10° to 52°11°) | 52°11° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from SSE, gusts 8 mph13 km/h | 83% | 82% | 0 |
| Sun 9p | Rain | 51°11° (likely 50°10° to 51°11°) | 51°11° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from SSE, gusts 9 mph15 km/h | 86% | 71% | 0 |
| Sun 10p | Rain | 50°10° (likely 49°9° to 52°11°) | 50°10° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from SSE, gusts 9 mph14 km/h | 88% | 75% | 0 |
| Sun 11p | Rain | 49°9° (likely 48°9° to 52°11°) | 47°8° | 80%, 0.02 in0.5 mm | 5 mph8 km/h from SSE, gusts 11 mph18 km/h | 89% | 75% | 0 |
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
50% chance · 0.09 in2.3 mm
Official NWS forecast
Today: Areas of fog and patchy frost before 10am. Partly sunny. High near 61, with temperatures falling to around 59 in the afternoon. Wind around 0 mph.
Tonight: Areas of fog between 1am and 4am, then areas of fog and patchy frost. Partly cloudy. Low around 34, with temperatures rising to around 36 overnight. Wind around 0 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
60% chance · 0.61 in15 mm
Afternoon
noon–6 PM
80% chance · 0.86 in22 mm
Evening
6 PM–midnight
80% chance · 0.32 in8.1 mm
Overnight
midnight–6 AM
70% chance · 0.15 in3.9 mm
Official NWS forecast
Day: Rain likely and patchy fog before 8am, then rain and areas of fog. Cloudy, with a high near 59. Southeast wind around 2 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Night: Rain. Mostly cloudy, with a low around 42. South southeast wind 2 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
70% chance · 0.05 in1.3 mm
Afternoon
noon–6 PM
70% chance · 0.07 in1.7 mm
Evening
6 PM–midnight
40% chance
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain. Mostly cloudy, with a high near 60. Chance of precipitation is 80%.
Night: A chance of rain before 11pm, then areas of fog. Mostly cloudy, with a low around 40.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
30% chance · 0.05 in1.2 mm
Evening
6 PM–midnight
20% chance · 0.02 in0.5 mm
Overnight
midnight–6 AM
40% chance · 0.06 in1.6 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 11am, then a slight chance of rain between 11am and 5pm. Mostly cloudy, with a high near 61.
Night: A chance of rain after 11pm. Mostly cloudy, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
40% chance · 0.03 in0.7 mm
Afternoon
noon–6 PM
50% chance · 0.07 in1.8 mm
Evening
6 PM–midnight
40% chance
Overnight
midnight–6 AM
20% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 60.
Night: A chance of rain. Mostly cloudy, with a low around 37.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
30% chance · 0.02 in0.6 mm
Afternoon
noon–6 PM
30% chance · 0.08 in1.9 mm
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 59.
Night: A slight chance of rain before 11pm. Mostly cloudy, with a low around 35.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 60.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Dry, high 61°, low 34°.
82% chance of rain, high 59°, low 42°.
78% chance of rain, high 60°, low 40°.
Highs 52–61°; chance of precipitation on Wednesday.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (PQR) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Forecast peak 11.2 ft Mon 11 AM
Reading from Fri 11 PM · NWS gauge page
Forecast peak 4.2 ft Thu 5 AM
Reading from Fri 10:30 PM · NWS gauge page
Reading from Fri 10:30 PM · NWS gauge page
Reading from Fri 10:30 PM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 69% less heating than a typical week.
Heating degree days, base 65°F
47, 17 and 5°F are the test points heat pumps are rated at. About 18 hours are near freezing and damp, when outdoor units defrost more often.
Dry air outside (dew point 34°F).
Today, 3:00 PM–4:00 PM
Good stretch to open the windows.
Today’s expected high is 2°1° warmer than typical.
Cornelius weather by month: normals, records, snow and freeze dates
Sunrise 7:40 AM, sunset 6:11 PM.
Clouds most of the night (about 65% cover).
Waxing gibbous
96% lit · growing