Columbia River at St. Helens
19 mi- Level
- 2.7 ft
Forecast peak 5.5 ft Wed 6 PM
Reading from Sat 2:06 AM · NWS gauge page
Appearance
Ends in 6 h 47 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 2:30 AM PDT at KVUO
Clear and 37°3°.
Today: low 34°1° (likely 34°1° to 40°4°), high 63°17° (likely 56°13° to 63°17°).
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 3a | Mostly clear | 38°3° (likely 38°3° to 41°5°) | 38°3° | 0% | 1 mph2 km/h from ENE, gusts 4 mph6 km/h | 100% | 41% | 0 |
| Sat 4a | Fog | 36°2° (likely 36°2° to 41°5°) | 36°2° | 0% | 1 mph2 km/h from ENE, gusts 4 mph7 km/h | 100% | 62% | 0 |
| Sat 5a | Fog | 36°2° (likely 36°2° to 42°6°) | 36°2° | 0% | 1 mph2 km/h from ENE, gusts 4 mph7 km/h | 99% | 64% | 0 |
| Sat 6a | Cloudy | 36°2° (likely 36°2° to 42°6°) | 36°2° | 0% | 1 mph2 km/h from ENE, gusts 4 mph7 km/h | 97% | 75% | 0 |
| Sat 7a | Cloudy | 35°2° (likely 35°2° to 42°6°) | 35°2° | 0% | 1 mph2 km/h from ENE, gusts 4 mph6 km/h | 94% | 79% | 0 |
| Sat 8a | Cloudy | 36°2° (likely 35°2° to 42°6°) | 36°2° | 0% | 2 mph3 km/h from ENE, gusts 4 mph6 km/h | 91% | 81% | 0 |
| Sat 9a | Cloudy | 39°4° (likely 39°4° to 44°7°) | 39°4° | 0% | 1 mph2 km/h from ENE, gusts 5 mph7 km/h | 87% | 82% | 0 |
| Sat 10a | Cloudy | 46°8° (likely 44°7° to 51°11°) | 46°8° | 0% | 0 mph0 km/h, gusts 5 mph7 km/h | 78% | 79% | 1 |
| Sat 11a | Cloudy | 52°11° (likely 48°9° to 55°13°) | 52°11° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 66% | 81% | 2 |
| Sat 12p | Cloudy | 56°13° (likely 51°11° to 59°15°) | 56°13° | 0% | 0 mph0 km/h, gusts 6 mph10 km/h | 60% | 81% | 3 |
| Sat 1p | Cloudy | 60°16° (likely 54°12° to 61°16°) | 60°16° | 0% | 0 mph0 km/h, gusts 7 mph11 km/h | 55% | 82% | 3 |
| Sat 2p | Cloudy | 61°16° (likely 55°13° to 63°17°) | 61°16° | 0% | 0 mph0 km/h, gusts 7 mph11 km/h | 51% | 83% | 2 |
| Sat 3p | Cloudy | 62°17° (likely 56°13° to 63°17°) | 62°17° | 0% | 0 mph0 km/h, gusts 5 mph9 km/h | 49% | 82% | 2 |
| Sat 4p | Cloudy | 62°17° (likely 55°13° to 62°17°) | 62°17° | 0% | 0 mph0 km/h, gusts 6 mph10 km/h | 52% | 81% | 2 |
| Sat 5p | Cloudy | 59°15° (likely 54°12° to 61°16°) | 59°15° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 56% | 82% | 1 |
| Sat 6p | Cloudy | 57°14° (likely 51°11° to 57°14°) | 57°14° | 5% | 0 mph0 km/h, gusts 5 mph8 km/h | 61% | 83% | 0 |
| Sat 7p | Cloudy | 53°12° (likely 49°9° to 53°12°) | 53°12° | 5% | 0 mph0 km/h, gusts 5 mph7 km/h | 70% | 82% | 0 |
| Sat 8p | Cloudy | 48°9° (likely 47°8° to 52°11°) | 48°9° | 5% | 1 mph2 km/h from E, gusts 5 mph8 km/h | 73% | 80% | 0 |
| Sat 9p | Cloudy | 46°8° (likely 46°8° to 51°11°) | 46°8° | 5% | 1 mph2 km/h from E, gusts 5 mph8 km/h | 73% | 80% | 0 |
| Sat 10p | Cloudy | 45°7° (likely 45°7° to 51°11°) | 45°7° | 5% | 1 mph2 km/h from E, gusts 5 mph8 km/h | 74% | 80% | 0 |
| Sat 11p | Cloudy | 45°7° (likely 44°7° to 50°10°) | 45°7° | 5% | 2 mph3 km/h from ESE, gusts 7 mph11 km/h | 74% | 80% | 0 |
| Sun 12a | Cloudy | 44°7° (likely 44°7° to 50°10°) | 44°7° | 5% | 2 mph3 km/h from ESE, gusts 7 mph11 km/h | 74% | 78% | 0 |
| Sun 1a | Cloudy | 44°7° (likely 44°7° to 49°9°) | 42°6° | 5% | 3 mph5 km/h from ESE, gusts 7 mph11 km/h | 72% | 75% | 0 |
| Sun 2a | Cloudy | 45°7° (likely 44°7° to 49°9°) | 45°7° | 5% | 2 mph3 km/h from SE, gusts 7 mph12 km/h | 71% | 74% | 0 |
| Sun 3a | Cloudy | 43°6° (likely 43°6° to 48°9°) | 41°5° | 5% | 3 mph5 km/h from SE, gusts 6 mph10 km/h | 73% | 73% | 0 |
| Sun 4a | Cloudy | 42°6° (likely 42°6° to 48°9°) | 40°4° | 5% | 3 mph5 km/h from ESE, gusts 6 mph10 km/h | 74% | 76% | 0 |
| Sun 5a | Cloudy | 42°6° (likely 42°6° to 47°8°) | 39°4° | 30%, 0.04 in1 mm | 5 mph8 km/h from SE, gusts 6 mph10 km/h | 74% | 76% | 0 |
| Sun 6a | Rain | 40°4° (likely 40°4° to 47°8°) | 37°3° | 40%, 0.04 in1 mm | 5 mph8 km/h from SE, gusts 6 mph10 km/h | 76% | 62% | 0 |
| Sun 7a | Rain | 42°6° (likely 42°6° to 47°8°) | 39°4° | 20%, 0.04 in1 mm | 5 mph8 km/h from SE, gusts 7 mph11 km/h | 77% | 76% | 0 |
| Sun 8a | Rain | 42°6° (likely 42°6° to 47°8°) | 39°4° | 20%, 0.04 in1 mm | 5 mph8 km/h from ESE, gusts 6 mph10 km/h | 78% | 79% | 0 |
| Sun 9a | Rain | 43°6° (likely 43°6° to 49°9°) | 40°4° | 20%, 0.04 in1 mm | 5 mph8 km/h from ESE, gusts 8 mph13 km/h | 81% | 83% | 0 |
| Sun 10a | Rain | 48°9° (likely 46°8° to 54°12°) | 46°8° | 30%, 0.04 in1 mm | 5 mph8 km/h from ESE, gusts 14 mph23 km/h | 79% | 85% | 1 |
| Sun 11a | Cloudy | 52°11° (likely 46°8° to 58°14°) | 52°11° | 10%, 0.26 in6.6 mm | 3 mph5 km/h from ESE, gusts 13 mph20 km/h | 72% | 93% | 2 |
| Sun 12p | Rain | 55°13° (likely 47°8° to 59°15°) | 55°13° | 30%, 0.26 in6.6 mm | 3 mph5 km/h from ESE, gusts 11 mph17 km/h | 71% | 100% | 2 |
| Sun 1p | Rain | 57°14° (likely 47°8° to 62°17°) | 57°14° | 50%, 0.26 in6.6 mm | 3 mph5 km/h from ESE, gusts 12 mph20 km/h | 69% | 100% | 3 |
| Sun 2p | Rain | 58°14° (likely 48°9° to 63°17°) | 58°14° | 60%, 0.26 in6.6 mm | 2 mph3 km/h from ESE, gusts 16 mph26 km/h | 68% | 100% | 3 |
| Sun 3p | Rain | 59°15° (likely 48°9° to 63°17°) | 59°15° | 70%, 0.26 in6.6 mm | 2 mph3 km/h from ESE, gusts 17 mph28 km/h | 65% | 100% | 2 |
| Sun 4p | Rain | 58°14° (likely 48°9° to 62°17°) | 58°14° | 70%, 0.26 in6.6 mm | 2 mph3 km/h from ESE, gusts 19 mph31 km/h | 69% | 60% | 2 |
| Sun 5p | Rain | 56°13° (likely 49°9° to 61°16°) | 56°13° | 70%, 0.08 in2 mm | 2 mph3 km/h from SE, gusts 14 mph23 km/h | 72% | 60% | 1 |
| Sun 6p | Rain | 54°12° (likely 50°10° to 56°13°) | 54°12° | 70%, 0.08 in2 mm | 2 mph3 km/h from SE, gusts 13 mph21 km/h | 75% | 58% | 0 |
| Sun 7p | Rain | 52°11° (likely 50°10° to 52°11°) | 52°11° | 70%, 0.08 in2 mm | 2 mph3 km/h from SE, gusts 14 mph22 km/h | 80% | 59% | 0 |
| Sun 8p | Rain | 49°9° (likely 49°9° to 50°10°) | 49°9° | 70%, 0.08 in2 mm | 2 mph3 km/h from ESE, gusts 12 mph19 km/h | 86% | 66% | 0 |
| Sun 9p | Cloudy | 48°9° (likely 48°9° to 50°10°) | 48°9° | 70%, 0.08 in2 mm | 2 mph3 km/h from ESE, gusts 12 mph20 km/h | 89% | 95% | 0 |
| Sun 10p | Cloudy | 48°9° (likely 48°9° to 51°11°) | 48°9° | 70%, 0.08 in2 mm | 2 mph3 km/h from ESE, gusts 14 mph22 km/h | 90% | 80% | 0 |
| Sun 11p | Rain | 47°8° (likely 46°8° to 51°11°) | 45°7° | 80%, 0.1 in2.5 mm | 5 mph8 km/h from ESE, gusts 10 mph17 km/h | 90% | 74% | 0 |
| Mon 12a | Rain | 47°8° (likely 44°7° to 50°10°) | 45°7° | 80%, 0.1 in2.5 mm | 5 mph8 km/h from ESE, gusts 8 mph12 km/h | 90% | 65% | 0 |
| Mon 1a | Rain | 46°8° (likely 43°6° to 49°9°) | 44°7° | 80%, 0.1 in2.5 mm | 5 mph8 km/h from ESE, gusts 8 mph13 km/h | 89% | 71% | 0 |
| Mon 2a | Rain | 46°8° (likely 42°6° to 49°9°) | 45°7° | 80%, 0.1 in2.5 mm | 3 mph5 km/h from ESE, gusts 9 mph14 km/h | 88% | 67% | 0 |
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
30% chance · 0.04 in1 mm
Official NWS forecast
Today: Patchy frost and patchy fog before 7am. Partly sunny. High near 63, with temperatures falling to around 59 in the afternoon. Northeast wind around 2 mph.
Tonight: Patchy fog before 4am, then patchy frost and patchy fog. Partly cloudy. Low around 34, with temperatures rising to around 36 overnight. East northeast wind around 1 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
40% chance · 0.46 in12 mm
Afternoon
noon–6 PM
70% chance · 1.4 in35 mm
Evening
6 PM–midnight
80% chance · 0.5 in13 mm
Overnight
midnight–6 AM
80% chance · 0.39 in9.9 mm
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 60. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Night: Rain. Mostly cloudy, with a low around 40. East southeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
70% chance · 0.21 in5.2 mm
Afternoon
noon–6 PM
70% chance · 0.07 in1.7 mm
Evening
6 PM–midnight
60% chance · 0.05 in1.3 mm
Overnight
midnight–6 AM
70% chance · 0.12 in3.1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.
Night: Rain likely before 8pm, then rain likely and areas of fog between 8pm and 5am, then areas of fog and a chance of rain. Mostly cloudy, with a low around 40.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
60% chance · 0.11 in2.8 mm
Afternoon
noon–6 PM
50% chance · 0.07 in1.9 mm
Evening
6 PM–midnight
50% chance · 0.11 in2.8 mm
Overnight
midnight–6 AM
60% chance · 0.2 in5.1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog and a chance of rain before 8am, then a chance of rain and patchy fog. Mostly cloudy, with a high near 58.
Night: Rain likely. Mostly cloudy, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
70% chance · 0.22 in5.5 mm
Afternoon
noon–6 PM
70% chance · 0.2 in5 mm
Evening
6 PM–midnight
70% chance · 0.15 in3.8 mm
Overnight
midnight–6 AM
70% chance · 0.11 in2.9 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 58.
Night: Rain likely. Mostly cloudy, with a low around 37.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
60% chance · 0.12 in3 mm
Afternoon
noon–6 PM
60% chance · 0.14 in3.6 mm
Evening
6 PM–midnight
40% chance · 0.17 in4.4 mm
Overnight
midnight–6 AM
30% chance · 0.2 in5 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 57.
Night: A chance of rain. Mostly cloudy, with a low around 36.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
20% chance · 0.11 in2.9 mm
Afternoon
noon–6 PM
20% chance · 0.07 in1.8 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 slight chance of rain. Partly sunny, with a high near 59.
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
20% chance
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 63°, low 34°.
73% chance of rain, high 60°, low 40°, cooling off.
74% chance of rain, high 58°, low 40°.
Highs 50–59°; chance of precipitation on Tuesday, Wednesday, Thursday.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (PQR) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Forecast peak 5.5 ft Wed 6 PM
Reading from Sat 2:06 AM · NWS gauge page
Forecast peak 5.2 ft Wed 7 PM
Reading from Sat 2:06 AM · NWS gauge page
Reading from Sat 1 AM · NWS gauge page
Reading from Sat 1:30 AM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 73% 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 6 hours are near freezing and damp, when outdoor units defrost more often.
Dry air outside (dew point 36°F).
Today, 1:00 PM–4:00 PM
Good stretch to open the windows.
Today’s expected high is 4°2° warmer than typical.
Yacolt weather by month: normals, records, snow and freeze dates
Sunrise 7:38 AM, sunset 6:07 PM.
Clouds most of the night (about 64% cover).
Waxing gibbous
96% lit · growing