Frost Advisory
Starts in 18 h 51 min
When
From 11 PM Friday to 9 AM PDT Saturday.
Where
Portions of northwest and west central Oregon and southwest Washington.
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; Lower Columbia River; Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; West Columbia River Gorge of Oregon above 500 ft; Clackamas County Cascade Foothills; Inner Vancouver Metro; East Clark County Lowlands
See it on weather.gov (opens in a new tab)

Observed 3:30 AM PDT at KTTD

Gresham, OR weather

Overcast and 52°11°.

Mostly agree

Now 52°11°

Cloudy

Wind: 6 mph9 km/h; From the west-southwest. Up to 6 mph9 km/h through 4 PM
Dew point: 39°4°; Comfortable
UV tomorrow: 3Moderate; Moderate 12–3 PM · peak 3
Air quality: 18Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.17 inHg1022 hPa; Rising · +0.05 inHg+1.7 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

6°3° warmer than this time yesterday (45°7° then, 51°11° now)

Good hours for

Above 50°10° today by noon
High 59°15° today at 4 PM
Below 50°10° tonight after 8 PM

TonightNear 45°7° · Mostly cloudy
This morningUp to 49°9° by 11 AM · Mostly cloudy
This afternoonUp to 59°15° by 4 PM · Partly cloudy
TonightDown to 39°4° by 5 AM · Partly cloudy
Tomorrow morningUp to 49°9° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 62°17° by 4 PM · Mostly cloudy
Tomorrow nightDown to 45°7° by 2 AM · rain chance 20% · Mostly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 4a	Partly cloudy	45°7° (likely 43°6° to 49°9°)	42°6°	0%	6 mph10 km/h from SSW, gusts 6 mph10 km/h	91%	81%	0
Fri 5a	Mostly cloudy	45°7° (likely 44°7° to 47°8°)	43°6°	0%	5 mph8 km/h from SSW, gusts 7 mph11 km/h	92%	70%	0
Fri 6a	Partly cloudy	44°7° (likely 44°7° to 46°8°)	41°5°	0%	5 mph8 km/h from SSW, gusts 8 mph13 km/h	95%	45%	0
Fri 7a	Clear	43°6° (likely 43°6° to 46°8°)	40°4°	0%	5 mph8 km/h from SSW, gusts 8 mph13 km/h	96%	42%	0
Fri 8a	Cloudy	44°7° (likely 43°6° to 46°8°)	41°5°	0%	5 mph8 km/h from SSW, gusts 9 mph14 km/h	96%	91%	0
Fri 9a	Cloudy	45°7° (likely 45°7° to 47°8°)	44°7°	0%	3 mph5 km/h from SSW, gusts 7 mph11 km/h	93%	82%	0
Fri 10a	Partly sunny	47°8° (likely 47°8° to 50°10°)	46°8°	0%	3 mph5 km/h from SW, gusts 7 mph12 km/h	88%	66%	0
Fri 11a	Partly sunny	49°9° (likely 49°9° to 52°11°)	48°9°	0%	3 mph5 km/h from SW, gusts 7 mph11 km/h	83%	47%	1
Fri 12p	Partly sunny	52°11° (likely 52°11° to 55°13°)	52°11°	0%	3 mph5 km/h from WSW, gusts 8 mph13 km/h	75%	32%	2
Fri 1p	Partly sunny	55°13° (likely 54°12° to 57°14°)	55°13°	0%	3 mph5 km/h from W, gusts 8 mph12 km/h	68%	25%	2
Fri 2p	Sunny	57°14° (likely 55°13° to 58°14°)	57°14°	0%	2 mph3 km/h from W, gusts 7 mph12 km/h	63%	27%	2
Fri 3p	Mostly sunny	57°14° (likely 56°13° to 59°15°)	57°14°	0%	2 mph3 km/h from W, gusts 8 mph13 km/h	58%	25%	2
Fri 4p	Mostly sunny	59°15° (likely 56°13° to 59°15°)	59°15°	0%	1 mph2 km/h from W, gusts 9 mph14 km/h	55%	21%	1
Fri 5p	Mostly sunny	57°14° (likely 56°13° to 59°15°)	57°14°	0%	1 mph2 km/h from W, gusts 7 mph11 km/h	55%	21%	1
Fri 6p	Clear	56°13° (likely 53°12° to 56°13°)	56°13°	0%	2 mph3 km/h from SSW, gusts 4 mph7 km/h	58%	23%	0
Fri 7p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	2 mph3 km/h from S, gusts 4 mph6 km/h	66%	27%	0
Fri 8p	Partly cloudy	49°9° (likely 48°9° to 51°11°)	48°9°	0%	3 mph5 km/h from SSE, gusts 3 mph5 km/h	74%	26%	0
Fri 9p	Partly cloudy	47°8° (likely 46°8° to 50°10°)	47°8°	0%	2 mph3 km/h from S, gusts 4 mph6 km/h	80%	62%	0
Fri 10p	Partly cloudy	46°8° (likely 45°7° to 47°8°)	46°8°	0%	2 mph3 km/h from SE, gusts 4 mph7 km/h	85%	56%	0
Fri 11p	Mostly clear	44°7° (likely 43°6° to 46°8°)	44°7°	0%	2 mph3 km/h from ESE, gusts 3 mph5 km/h	89%	51%	0
Sat 12a	Partly cloudy	43°6° (likely 42°6° to 46°8°)	43°6°	0%	2 mph3 km/h from ESE, gusts 3 mph5 km/h	94%	44%	0
Sat 1a	Mostly clear	42°6° (likely 41°5° to 44°7°)	40°4°	0%	3 mph5 km/h from ESE, gusts 4 mph6 km/h	97%	39%	0
Sat 2a	Partly cloudy	41°5° (likely 40°4° to 43°6°)	39°4°	0%	3 mph5 km/h from NE, gusts 4 mph6 km/h	97%	52%	0
Sat 3a	Partly cloudy	40°4° (likely 39°4° to 42°6°)	40°4°	0%	2 mph3 km/h from N, gusts 3 mph6 km/h	99%	51%	0
Sat 4a	Mostly clear	40°4° (likely 38°3° to 40°4°)	40°4°	0%	2 mph3 km/h from N, gusts 3 mph5 km/h	99%	62%	0
Sat 5a	Partly cloudy	39°4° (likely 37°3° to 40°4°)	39°4°	0%	2 mph3 km/h from N, gusts 3 mph4 km/h	99%	60%	0
Sat 6a	Partly cloudy	39°4° (likely 37°3° to 40°4°)	39°4°	0%	2 mph3 km/h from N, gusts 3 mph5 km/h	99%	63%	0
Sat 7a	Cloudy	38°3° (likely 37°3° to 40°4°)	38°3°	0%	2 mph3 km/h from N, gusts 3 mph5 km/h	99%	71%	0
Sat 8a	Cloudy	39°4° (likely 37°3° to 41°5°)	39°4°	0%	2 mph3 km/h from NNE, gusts 3 mph4 km/h	99%	71%	0
Sat 9a	Cloudy	41°5° (likely 40°4° to 43°6°)	41°5°	0%	2 mph3 km/h from NNE, gusts 2 mph4 km/h	90%	63%	0
Sat 10a	Cloudy	45°7° (likely 45°7° to 48°9°)	45°7°	0%	2 mph3 km/h from NNE, gusts 4 mph6 km/h	83%	64%	1
Sat 11a	Cloudy	49°9° (likely 48°9° to 52°11°)	49°9°	0%	2 mph3 km/h from N, gusts 8 mph12 km/h	74%	80%	2
Sat 12p	Cloudy	53°12° (likely 51°11° to 56°13°)	53°12°	0%	2 mph3 km/h from N, gusts 7 mph10 km/h	66%	65%	3
Sat 1p	Cloudy	58°14° (likely 54°12° to 60°16°)	58°14°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	58%	76%	3
Sat 2p	Cloudy	60°16° (likely 56°13° to 62°17°)	60°16°	0%	2 mph3 km/h from N, gusts 4 mph6 km/h	55%	82%	3
Sat 3p	Cloudy	61°16° (likely 56°13° to 63°17°)	61°16°	0%	2 mph3 km/h from N, gusts 4 mph6 km/h	51%	83%	2
Sat 4p	Partly sunny	62°17° (likely 56°13° to 63°17°)	62°17°	0%	2 mph3 km/h from N, gusts 4 mph7 km/h	51%	71%	2
Sat 5p	Cloudy	61°16° (likely 55°13° to 62°17°)	61°16°	0%	2 mph3 km/h from NE, gusts 4 mph6 km/h	52%	80%	1
Sat 6p	Cloudy	58°14° (likely 56°13° to 58°14°)	58°14°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	54%	80%	0
Sat 7p	Cloudy	55°13° (likely 53°12° to 55°13°)	55°13°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	61%	81%	0
Sat 8p	Cloudy	51°11° (likely 51°11° to 52°11°)	51°11°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	67%	80%	0
Sat 9p	Cloudy	50°10° (likely 48°9° to 51°11°)	50°10°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	70%	80%	0
Sat 10p	Cloudy	48°9° (likely 46°8° to 49°9°)	48°9°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	74%	76%	0
Sat 11p	Cloudy	47°8° (likely 44°7° to 49°9°)	46°8°	20%	3 mph5 km/h from E, gusts 5 mph8 km/h	77%	75%	0
Sun 12a	Cloudy	46°8° (likely 41°5° to 46°8°)	45°7°	20%	3 mph5 km/h from E, gusts 4 mph7 km/h	78%	80%	0
Sun 1a	Rain	46°8° (likely 40°4° to 46°8°)	45°7°	20%	3 mph5 km/h from E, gusts 4 mph7 km/h	80%	76%	0
Sun 2a	Rain	45°7° (likely 40°4° to 46°8°)	43°6°	20%	5 mph8 km/h from ESE, gusts 4 mph6 km/h	81%	87%	0
Sun 3a	Rain	45°7° (likely 41°5° to 47°8°)	43°6°	20%	5 mph8 km/h from ESE, gusts 5 mph8 km/h	81%	77%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 23. Partly sunny. High 59°15°, low 43°6°. Typical 60°16° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 39°4°
  Dry
Official NWS forecast
Today: Mostly sunny. High near 59, with temperatures falling to around 57 in the afternoon. West southwest wind 1 to 5 mph.
Tonight: Partly cloudy. Low around 43, with temperatures rising to around 45 overnight. South southwest wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–59°15°
Low, likely
41°5°–44°7°
Typical high / low
60°16° / 46°8°
Wind
8 mph13 km/h, gusts 13 mph22 km/h
UV peak
3
Tomorrow, Oct 24. Cloudy. High 63°17°, low 42°6°. Typical 59°15° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Rain, 44°7°
  Dry
Official NWS forecast
Day: Partly sunny, with a high near 63. North northeast wind around 2 mph.
Night: A chance of rain after 11pm. Mostly cloudy, with a low around 42. East wind around 5 mph. Chance of precipitation is 50%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
56°13°–63°17°
Low, likely
37°3°–42°6°
Typical high / low
59°15° / 46°8°
Wind
6 mph10 km/h, gusts 13 mph21 km/h
UV peak
3
Sunday, Oct 25. Rain. High 61°16°, low 45°7°. Typical 59°15° / 46°8°. Rain 0.42 in11 mm, 60% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 43°6°
  40% chance · 0.06 in1.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 57°14°
  60% chance · 0.09 in2.2 mm
3. Evening
  6 PM–midnight
  Rain, 52°11°
  60% chance · 0.14 in3.6 mm
4. Overnight
  midnight–6 AM
  Rain, 48°9°
  60% chance · 0.18 in4.5 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
Night: Rain likely. Mostly cloudy, with a low around 45.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
53°12°–64°18°
Low, likely
39°4°–45°7°
Typical high / low
59°15° / 46°8°
Wind
9 mph15 km/h, gusts 22 mph36 km/h
UV peak
3
Monday, Oct 26. Rain. High 61°16°, low 44°7°. Typical 59°15° / 45°7°. Rain 0.41 in10 mm, 70% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  60% chance · 0.1 in2.5 mm
2. Afternoon
  noon–6 PM
  Drizzle, 56°13°
  60% chance · 0.12 in3 mm
3. Evening
  6 PM–midnight
  Clear, 50°10°
  50% chance · 0.03 in0.8 mm
4. Overnight
  midnight–6 AM
  Clear, 47°9°
  40% chance · 0.05 in1.1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 61.
Night: Rain likely. Mostly cloudy, with a low around 44.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
53°12°–61°16°
Low, likely
44°7°–49°9°
Typical high / low
59°15° / 45°7°
Wind
8 mph13 km/h, gusts 24 mph39 km/h
UV peak
3
Tuesday, Oct 27. Rain. High 59°15°, low 42°6°. Typical 58°14° / 45°7°. Rain 0.16 in4.1 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  30% chance · 0.04 in1 mm
2. Afternoon
  noon–6 PM
  Cloudy, 57°14°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 59.
Night: A slight chance of rain. Mostly cloudy, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–59°15°
Low, likely
42°6°–47°8°
Typical high / low
58°14° / 45°7°
Wind
7 mph11 km/h, gusts 17 mph27 km/h
UV peak
3
Wednesday, Oct 28. Rain. High 61°16°, low 42°6°. Typical 58°14° / 45°7°. Rain 0.12 in3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 46°8°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 56°13°
  30% chance
3. Evening
  6 PM–midnight
  Clear, 50°10°
  20% chance · 0.05 in1.1 mm
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 61.
Night: A slight chance of rain. Mostly cloudy, with a low around 42.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
52°11°–61°16°
Low, likely
42°6°–47°8°
Typical high / low
58°14° / 45°7°
Wind
12 mph20 km/h, gusts 24 mph39 km/h
UV peak
3
Thursday, Oct 29. Rain. High 61°16°, low 44°7°. Typical 58°14° / 45°7°. Rain 0.12 in3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  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 61.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
52°11°–62°17°
Low, likely
40°4°–49°9°
Typical high / low
58°14° / 45°7°
Wind
11 mph18 km/h, gusts 24 mph39 km/h
UV peak
3
Friday, Oct 30. Sunny. High 56°13°, low 42°6°. Typical 57°14° / 45°7°. Rain 0.07 in1.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°10°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 43°6°
  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.
High, likely
50°10°–61°16°
Low, likely
35°2°–50°10°
Typical high / low
57°14° / 45°7°
Wind
9 mph14 km/h, gusts 22 mph36 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 57°14°, low 42°6°. Typical 57°14° / 44°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 45°7°
  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.
High, likely
52°11°–62°17°
Low, likely
37°3°–46°8°
Typical high / low
57°14° / 44°7°
Wind
6 mph10 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 59°15°, low 44°7°. Typical 57°14° / 44°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  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.
High, likely
55°13°–63°17°
Low, likely
38°3°–50°10°
Typical high / low
57°14° / 44°7°
Wind
9 mph15 km/h, gusts 20 mph32 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 59°, low 43°.
Tomorrow
Dry, high 63°, low 42°, warming up.
Sunday
61% chance of rain, high 61°, low 45°.
Rest of week
Highs 56–61°; chance of precipitation on Monday.

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

Full-screen radar

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 65% less heating than a typical week.

This week 32Typical 91

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 25
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 9 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 39°F).

Open the windows?

Sat, 2:00 PM–5:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

Portland Kgw-Tv · official normals 1991–2020 · records 1874–2026

Oct 23, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 4°2° warmer than normal (daily mean temperature).

+4°+2°SatOct 17
+1°±0°SunOct 18
+3°+2°MonOct 19
+7°+4°TueOct 20
+6°+3°WedOct 21
+4°+2°ThuOct 22
—FriOct 23

Gresham weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 33 min; Losing 3 min 3 s a day; shortest Dec 21, 1 h 51 min less
Golden hour: 5:28–6:28 PM; Morning 7:18–8:18 AM
Blue hour: 6:28–6:40 PM; Morning 7:06–7:18 AM; first light 7:06 AM

Stars tonight? Poor

Clouds most of the night (about 60% cover).

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:42 AM · rises 4:50 PM
Full moon: Oct 25
New moon: Nov 8

Looking east from Gresham. The highest point on the skyline is about 12,100 ft, 66 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Frost Advisory