Sandy River near Bull Run
3.7 mi- Level
- 7.5 ft
- Flow
- 266 cfs
Forecast peak 7.7 ft Thu 5 AM
Reading from Fri 10:45 PM · NWS gauge page
1 active weather alert
Frost Advisory
Ends in 9 h 24 min
- When
- Until 10 AM PDT Saturday.
- Where
- In Oregon, Tualatin Valley, Central Oregon Coast Range, and Central Oregon Coast Range Lowlands. In Washington, Cowlitz County Lowlands, North Clark County Lowlands, South Washington Cascade Foothills, and Willapa Hills.
Issued for this forecast zone · National Weather Service Portland OR
What, impacts and precautionsHide details
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 KTTD
Sandy, OR weather
Clear and 43°6°.
Today: low 36°2° (likely 35°2° to 36°2°), high 59°15° (likely 56°13° to 59°15°).
Now 43°6°
Clear
- Wind
- 3 mph5 km/h
- From the east. Up to 5 mph8 km/h through 12 PM
- Dew point
- 39°4°
- Comfortable
- Air quality
- 18Good
- Main pollutant: PM2.5 (fine particles)
Next 48 hours
Good hours for
TonightDown to 38°3° by 4 AM
This morningUp to 49°9° by 11 AM
This afternoonUp to 58°14° by 4 PM
TonightDown to 44°7° by 3 AM
Tomorrow morningUp to 51°11° by 11 AM · rain chance 10%
Tomorrow afternoonUp to 57°14° by 4 PM · Rain 2–6 PM (70%)
Tomorrow nightDown to 49°9° by 10 PM · Rain all night (70%)
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 12a | Mostly clear | 42°6° (likely 39°4° to 42°6°) | 39°4° | 0% | 5 mph8 km/h from ESE | 90% | — | — |
| Sat 1a | Partly cloudy | 41°5° (likely 38°3° to 41°5°) | 38°3° | 0% | 5 mph8 km/h from E | 91% | — | — |
| Sat 2a | Partly cloudy | 40°4° (likely 37°3° to 40°4°) | 38°3° | 0% | 3 mph5 km/h from E | 91% | — | — |
| Sat 3a | Mostly clear | 40°4° (likely 37°3° to 40°4°) | 38°3° | 0% | 3 mph5 km/h from E | 91% | — | — |
| Sat 4a | Partly cloudy | 38°3° (likely 36°2° to 38°3°) | 36°2° | 0% | 3 mph5 km/h from E | 90% | — | — |
| Sat 5a | Partly cloudy | 38°3° (likely 35°2° to 38°3°) | 36°2° | 0% | 3 mph5 km/h from ESE | 88% | — | — |
| Sat 6a | Mostly cloudy | 38°3° (likely 35°2° to 38°3°) | 36°2° | 0% | 3 mph5 km/h from ESE | 90% | — | — |
| Sat 7a | Mostly cloudy | 37°3° (likely 35°2° to 37°3°) | 34°1° | 0% | 3 mph5 km/h from ESE | 88% | — | — |
| Sat 8a | Mostly cloudy | 38°3° (likely 35°2° to 38°3°) | 36°2° | 0% | 3 mph5 km/h from ESE | 86% | — | — |
| Sat 9a | Mostly cloudy | 40°4° (likely 40°4° to 40°4°) | 40°4° | 0% | 2 mph3 km/h from E | 76% | — | — |
| Sat 10a | Mostly cloudy | 46°8° (likely 45°7° to 46°8°) | 46°8° | 0% | 1 mph2 km/h from NNE | 69% | — | — |
| Sat 11a | Mostly cloudy | 49°9° (likely 49°9° to 49°9°) | 49°9° | 0% | 1 mph2 km/h from NW | 62% | — | — |
| Sat 12p | Partly sunny | 52°11° (likely 52°11° to 52°11°) | 52°11° | 0% | 1 mph2 km/h from WNW | 57% | — | — |
| Sat 1p | Partly sunny | 56°13° (likely 54°12° to 56°13°) | 56°13° | 0% | 1 mph2 km/h from WNW | 53% | — | — |
| Sat 2p | Partly sunny | 57°14° (likely 56°13° to 57°14°) | 57°14° | 0% | 2 mph3 km/h from WNW | 51% | — | — |
| Sat 3p | Partly sunny | 57°14° (likely 56°13° to 57°14°) | 57°14° | 0% | 1 mph2 km/h from WNW | 52% | — | — |
| Sat 4p | Partly sunny | 58°14° (likely 56°13° to 58°14°) | 58°14° | 0% | 1 mph2 km/h from W | 52% | — | — |
| Sat 5p | Mostly cloudy | 57°14° (likely 54°12° to 57°14°) | 57°14° | 0% | 1 mph2 km/h from WNW | 57% | — | — |
| Sat 6p | Mostly cloudy | 55°13° (likely 51°11° to 55°13°) | 55°13° | 0% | 1 mph2 km/h from SSW | 59% | — | — |
| Sat 7p | Mostly cloudy | 53°12° (likely 49°9° to 53°12°) | 53°12° | 0% | 1 mph2 km/h from SE | 66% | — | — |
| Sat 8p | Mostly cloudy | 49°9° (likely 47°8° to 49°9°) | 49°9° | 0% | 2 mph3 km/h from ESE | 72% | — | — |
| Sat 9p | Mostly cloudy | 48°9° (likely 46°8° to 48°9°) | 48°9° | 0% | 2 mph3 km/h from SE | 73% | — | — |
| Sat 10p | Mostly cloudy | 47°8° (likely 45°7° to 47°8°) | 46°8° | 0% | 3 mph5 km/h from SSE | 72% | — | — |
| Sat 11p | Mostly cloudy | 47°8° (likely 44°7° to 47°8°) | 46°8° | 5% | 3 mph5 km/h from SSE | 69% | — | — |
| Sun 12a | Mostly cloudy | 46°8° (likely 43°6° to 46°8°) | 45°7° | 5% | 3 mph5 km/h from SSE | 68% | — | — |
| Sun 1a | Mostly cloudy | 46°8° (likely 42°6° to 46°8°) | 45°7° | 5% | 3 mph5 km/h from SE | 67% | — | — |
| Sun 2a | Cloudy | 46°8° (likely 42°6° to 46°8°) | 45°7° | 5% | 3 mph5 km/h from SE | 67% | — | — |
| Sun 3a | Mostly cloudy | 44°7° (likely 41°5° to 44°7°) | 42°6° | 0% | 3 mph5 km/h from SSE | 67% | — | — |
| Sun 4a | Mostly cloudy | 44°7° (likely 41°5° to 44°7°) | 42°6° | 0% | 3 mph5 km/h from SSE | 67% | — | — |
| Sun 5a | Mostly cloudy | 44°7° (likely 41°5° to 44°7°) | 42°6° | 5%, 0.02 in0.5 mm | 3 mph5 km/h from SE | 66% | — | — |
| Sun 6a | Mostly cloudy | 42°6° (likely 40°4° to 42°6°) | 40°4° | 10%, 0.02 in0.5 mm | 3 mph5 km/h from SE | 69% | — | — |
| Sun 7a | Mostly cloudy | 43°6° (likely 40°4° to 43°6°) | 41°5° | 0%, 0.02 in0.5 mm | 3 mph5 km/h from SE | 70% | — | — |
| Sun 8a | Mostly cloudy | 43°6° (likely 41°5° to 43°6°) | 41°5° | 0%, 0.02 in0.5 mm | 3 mph5 km/h from ESE | 71% | — | — |
| Sun 9a | Mostly cloudy | 45°7° (likely 44°7° to 45°7°) | 44°7° | 0%, 0.02 in0.5 mm | 3 mph5 km/h from ESE | 68% | — | — |
| Sun 10a | Mostly cloudy | 49°9° (likely 48°9° to 49°9°) | 48°9° | 10%, 0.02 in0.5 mm | 3 mph5 km/h from ESE | 67% | — | — |
| Sun 11a | Mostly cloudy | 51°11° (likely 50°10° to 51°11°) | 51°11° | 0%, 0.12 in3 mm | 1 mph2 km/h from NNW | 66% | — | — |
| Sun 12p | Mostly cloudy | 52°11° (likely 52°11° to 52°11°) | 52°11° | 5%, 0.12 in3 mm | 1 mph2 km/h from NNW | 66% | — | — |
| Sun 1p | Rain | 55°13° (likely 55°13° to 55°13°) | 55°13° | 20%, 0.12 in3 mm | 1 mph2 km/h from NNW | 65% | — | — |
| Sun 2p | Rain | 56°13° (likely 56°13° to 56°13°) | 56°13° | 30%, 0.12 in3 mm | 2 mph3 km/h from ENE | 65% | — | — |
| Sun 3p | Rain | 56°13° (likely 56°13° to 56°13°) | 56°13° | 50%, 0.12 in3 mm | 2 mph3 km/h from ENE | 67% | — | — |
| Sun 4p | Rain | 57°14° (likely 57°14° to 57°14°) | 57°14° | 70%, 0.12 in3 mm | 2 mph3 km/h from ENE | 69% | — | — |
| Sun 5p | Rain | 55°13° (likely 55°13° to 55°13°) | 55°13° | 60%, 0.05 in1.3 mm | 2 mph3 km/h from ESE | 74% | — | — |
| Sun 6p | Rain | 54°12° (likely 54°12° to 54°12°) | 54°12° | 60%, 0.05 in1.3 mm | 2 mph3 km/h from ESE | 73% | — | — |
| Sun 7p | Rain | 52°11° (likely 52°11° to 52°11°) | 52°11° | 60%, 0.05 in1.3 mm | 2 mph3 km/h from ESE | 77% | — | — |
| Sun 8p | Rain | 50°10° (likely 50°10° to 50°10°) | 49°9° | 60%, 0.05 in1.3 mm | 3 mph5 km/h from SE | 82% | — | — |
| Sun 9p | Rain | 50°10° (likely 50°10° to 50°10°) | 49°9° | 60%, 0.05 in1.3 mm | 3 mph5 km/h from SE | 83% | — | — |
| Sun 10p | Rain | 49°9° (likely 49°9° to 49°9°) | 48°9° | 60%, 0.05 in1.3 mm | 3 mph5 km/h from SE | 83% | — | — |
| Sun 11p | Rain | 49°9° (likely 49°9° to 49°9°) | 47°8° | 70%, 0.04 in1 mm | 5 mph8 km/h from ESE | 82% | — | — |
Days ahead
Shaded: typical range for these dates (1991–2020)
Today, Oct 24. Mostly cloudy. High 59°15°, low 36°2°. Typical 61°16° / 45°7°. Dry. One forecast only.
Morning
6 AM–noon
Mostly cloudy, 38°3°Dry
Afternoon
noon–6 PM
Partly sunny, 58°14°Dry
Evening
6 PM–midnight
Mostly cloudy, 49°9°Dry
Overnight
midnight–6 AM
Mostly cloudy, 44°7°Dry
Official NWS forecast
Today: Areas of frost between 7am and 8am. Partly sunny. High near 59, with temperatures falling to around 57 in the afternoon. Northwest wind around 3 mph.
Tonight: Partly cloudy. Low around 36, with temperatures rising to around 38 overnight. East wind around 5 mph.
One forecast onlyOnly one forecast covers this day, so there is nothing to compare against.
- High, likely
- 56°13°–59°15°
- Low, likely
- 35°2°–36°2°
- Typical high / low
- 61°16° / 45°7°
- Wind
- 3 mph5 km/h
Tomorrow, Oct 25. Rain. High 59°15°, low 44°7°. Typical 60°16° / 45°7°. Rain 0.56 in14 mm, 70% chance. One forecast only.
Morning
6 AM–noon
Mostly cloudy, 43°6°Dry
Afternoon
noon–6 PM
Rain, 57°14°70% chance · 0.65 in17 mm
Evening
6 PM–midnight
Rain, 50°10°70% chance · 0.29 in7.4 mm
Official NWS forecast
Day: Rain likely after 1pm. Mostly cloudy, with a high near 59. East wind around 3 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Night: Rain likely. Mostly cloudy, with a low around 44. East southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
One forecast onlyOnly one forecast covers this day, so there is nothing to compare against.
- High, likely
- 53°12°–59°15°
- Low, likely
- 40°4°–44°7°
- Typical high / low
- 60°16° / 45°7°
- Wind
- 5 mph8 km/h
Monday, Oct 26. Rain. High 55°13°, low 44°7°. Typical 60°16° / 45°7°. Rain 0.54 in14 mm, 80% chance. One forecast only.
Official NWS forecast
Day: Rain. Mostly cloudy, with a high near 55. Chance of precipitation is 80%.
Night: Rain likely. Mostly cloudy, with a low around 44.
One forecast onlyOnly one forecast covers this day, so there is nothing to compare against.
- High, likely
- 53°12°–55°13°
- Low, likely
- 44°7°–47°8°
- Typical high / low
- 60°16° / 45°7°
- Wind
- 8 mph13 km/h
Tuesday, Oct 27. Rain. High 55°13°, low 42°6°. Typical 59°15° / 44°7°. Rain 0.46 in12 mm, 40% chance. One forecast only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 55.
Night: A chance of rain. Mostly cloudy, with a low around 42.
One forecast onlyOnly one forecast covers this day, so there is nothing to compare against.
- High, likely
- 52°11°–55°13°
- Low, likely
- 42°6°–46°8°
- Typical high / low
- 59°15° / 44°7°
- Wind
- 9 mph14 km/h
Wednesday, Oct 28. Rain. High 55°13°, low 41°5°. Typical 59°15° / 44°7°. Rain 0.63 in16 mm, 60% chance. One forecast only.
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 55.
Night: Rain likely. Mostly cloudy, with a low around 41.
One forecast onlyOnly one forecast covers this day, so there is nothing to compare against.
- High, likely
- 49°9°–55°13°
- Low, likely
- 41°5°–43°6°
- Typical high / low
- 59°15° / 44°7°
- Wind
- 10 mph16 km/h
Thursday, Oct 29. Rain. High 54°12°, low 39°4°. Typical 59°15° / 44°7°. Rain 0.4 in10 mm, 50% chance. One forecast only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 54.
Night: A chance of rain. Mostly cloudy, with a low around 39.
One forecast onlyOnly one forecast covers this day, so there is nothing to compare against.
- High, likely
- 48°9°–54°12°
- Low, likely
- 39°4°
- Typical high / low
- 59°15° / 44°7°
- Wind
- 6 mph10 km/h
Friday, Oct 30. Rain. High 56°13°, low 37°3°. Typical 58°14° / 44°7°. Rain 0.11 in2.8 mm, 20% chance. One forecast only.
Official NWS forecast
Day: A slight chance of rain. Partly sunny, with a high near 56.
One forecast onlyOnly one forecast covers this day, so there is nothing to compare against.
- High, likely
- 49°9°–56°13°
- Low, likely
- 37°3°
- Typical high / low
- 58°14° / 44°7°
- Wind
- 5 mph8 km/h
The outlook
Today
Dry, high 59°, low 36°.
Tomorrow
65% chance of rain, high 59°, low 44°.
Monday
75% chance of rain, high 55°, low 44°, cooling off.
Rest of week
Highs 54–56°; chance of precipitation on Tuesday, Wednesday, Thursday.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (PQR) (opens in a new tab)
What changed since yesterday
No meaningful changes from yesterday’s forecast.
Radar
Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view
Rivers
NOAA river gauges within 25 mi
Below flood stage
Clackamas River near Estacada
7.9 mi- Level
- 10.7 ft
- Flow
- 625 cfs
Forecast peak 10.8 ft Thu 5 AM
Reading from Fri 10:45 PM · NWS gauge page
Little Sandy River near Bull Run
4.9 mi- Level
- 1.5 ft
- Flow
- 9 cfs
Reading from Fri 10:15 PM · NWS gauge page
Bull Run River near Bull Run
5.1 mi- Level
- 2.8 ft
- Flow
- 34 cfs
Reading from Fri 10:45 PM · NWS gauge page
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 64% less heating than a typical week.
This week 33Typical 92
Heating degree days, base 65°F
Heat-pump hours, next 7 days
- h below 47°F
- 22
- h below 17°F
- 0
- h below 5°F
- 0
47, 17 and 5°F are the test points heat pumps are rated at. About 8 hours are near freezing and damp, when outdoor units defrost more often.
Comfort
Dry air outside (dew point 39°F).
Open the windows?
No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.
Is this typical?
PORTLAND TROUTDALE AP · official normals 1991–2020 · records 1948–2026
Oct 24, today vs a typical year
Today’s expected high is 2°1° colder than typical.
- Normal high / low
- 61°16° / 45°7°
- Forecast high / low
- 59°15° / 36°2°
- Record high
- 74°23° in 1959
- Record low
- 33°1° in 2008
Last 7 days vs normal
On average 2°1° warmer than normal (daily mean temperature).
- +1°±0°SatOct 17
- −3°−2°SunOct 18
- +2°+1°MonOct 19
- +3°+2°TueOct 20
- +7°+4°WedOct 21
- +1°±0°ThuOct 22
- —FriOct 23
Sandy weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:37 AM, sunset 6:08 PM.
- Daylight
- 10 h 31 min
- Losing 2 min 58 s a day; shortest Dec 21, 1 h 48 min less
- Golden hour
- 5:26–6:26 PM
- Morning 7:18–8:19 AM
- Blue hour
- 6:26–6:38 PM
- Morning 7:07–7:18 AM; first light 7:07 AM
Stars tonight? Unknown
Cloud forecast not available for tonight.
Moon
Waxing gibbous
96% lit · growing
- Today
- sets 5:55 AM · rises 5:09 PM
- Full moon
- Oct 25
- New moon
- Nov 8
