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Air Stagnation Advisory AIR STAGNATION ADVISORY - Portland

NWS Northwest Regional Radar Web Cam
Radar/Satellite images courtesy of National Weather Service.
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METRIC | IMPERIAL
Updated: 18-Jan-2026 @ 8:57am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 2.4°F than last hour.

30.6°F

Wind Chill:  30.6°F
---
High Today
33.0°F
12:00 AM 		Low Today
28.2°F
7:55 AM
Yest High
52.3°F
3:31 PM 		Yest Low
30.7°F
6:22 AM
Sta* High
63.1°F
2009 		Sta* Low
11.5°F
2012
* This Station's Records Since 01/2020
Official Record High Official Record Low
Overcast and gloomy, Dry Overcast and gloomy, Dry

Calm Wind:  S
0.0
Gusting to:
 0.0 mph
Current Snow SnowMelt:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-2.4 of 100
Today

Today: Widespread Frost then Sunny
Widespread Frost then Sunny
Tonight

Tonight: Patchy Fog then Areas Of Frost
Patchy Fog then Areas Of Frost
M.L. King
Jr. Day
M.L. King Jr. Day: Widespread Frost then Sunny
Widespread Frost then Sunny
Hi 51°F Lo 34°F Hi 51°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 2.6°F since last hour. 29.3°F
Last Hour: Increased 2.6°F since last hour. +2.6°F
High 12:00 AM: 30.9°F
Low 7:55 AM: 26.7°F
Record High: 80.8°F on
28-Jun-2021
Record Low: 11.7°F on
22-Dec-2022
Wetbulb: 30.1°F
Rain Today
rain graph
Melt Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.11 in
Jan Rain: 3.78 in
Jan to Date
  Avg:10 		1.87 in
Jan to Date
  Diff from Avg:10 		Over 1.91 in for the month 1.91 in
Jan Avg: 2.91 in
Diff from Avg: Over 0.87 in for the month 0.87 in
Season:1 3.780 in
YTD
  Avg:11 		1.87 in
YTD
  Diff from Avg:11 		Over 1.91 in for the year 1.91 in
Last Rain
Time/Date: 		15-Jan-2026
at 4:26 AM
14 rain days in 2026
14 days in January
3 days since last rain
Current: S  0.0 mph
1Hr Average: 0.5 mph
Wind Run: 2.36 miles
Wind Gust
Current: 0.0 mph
Today: 3.5 mph 12:46 AM
Month: 16.0 mph 6-Jan
Year: 16.0 mph 6-Jan
Record Gust: 33.0 mph
19-Mar-2025
Sunlight:
9 h 10 m 14 s
of Sunlight Yesterday
9 h 12 m 17 s
of Sunlight Today Which is
2 min 3 sec longer than
yesterday
9 h 14 m 24 s
of Sunlight Tomorrow
 (Noon ?>) graph (Midnight
 Legend

New Moon
New Moon, 29 days, 15 hours, 15 minutes in cycle
0%
Illuminated
Humidity Barometer
Current: Increased 1% since last hour. 95%
Last Hour: Increased 1% since last hour. 1%
High 8:43 AM: 96%
Low 12:08 AM: 91%
Record High: 100%
30-Nov-2014
Record Low: 0%
26-Jan-2015
Current: Rising 0.9 inHg/hr 1027.9 inHg
Last Hour: Rising
High 8:55 AM: 1027.9
Low 12:56 AM: 1025.8
Record High: 1045.4 inHg
30-Dec-2014
Record Low: 979.4 inHg
27-Dec-2022
Heating Degree Days Coming Soon Wind Chill
Today: 11.9
Jan: 376.1
2026 to Date: 375.1
Cooling Degree Days
2026 to Date: 0.0
Current: 30.6°F
Low 8:31 AM: 27.7°F
Yesterday: 30.7°F
Record: 14.2°F
15-Jan-2024
Current UV Index Current Solar Energy9
0.0
Sunburn in
720 Minutes 		Highest:
12:00 AM
0.0
28 W/m2
0%
W/m2 ⇒ SI 		High Today:
8:37 AM
 77  W/m2
Record:
1531 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 43.3°F
Sunrise: 07:48
Sunset: 16:55
Moonrise: 08:11
Moonset: 15:37
Full Moon: 03-Jan-2026
New Moon: 19:53 UTC
18-Jan-2026
Updated at Midnight
Current ET: 0.00 in
7-Days Rain: 0.11 in
7-Days ET: 0.06 in
7-Day: 0.047 in water in excess of what evaporated in last 7 days. 0.047 in
January: 3.65 in water in excess of what evaporated this month. 3.65 in
HIGHS: LOWS:
110.1°F
27-Jun-2021 		15.6°F
16-Jan-2024
Daytime Records
  93.0°F°F
27-Jun-2021 		  23.0°F°F
13-Jan-2024
Nitetime Records
  82.8°F°F
28-Jun-2021 		  20.3°F°F
16-Jan-2024
ICN:18 | S3C2:0 | Ajax 3.xx
ISS:Ok | CON:3.1 | RCP:99%
1 Rain season: Jan 1st to Dec 31st.   5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).   9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station’s recorded maximum or a percentage of computed theoretical solar maximum using the station’s location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.   10 Historical average only to day 18 of just the month of January for this station since 2020.   11 Historical average rain this season to day 18 of January for this station since 2020.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Widespread Frost then Sunny
Widespread Frost then Sunny

Hi 51°F 		NWS forecast: Widespread frost and patchy fog before 11am. Sunny. High near 51, with temperatures falling to around 47 in the afternoon. East wind around 2 mph.
Local station forecast: Partly cloudy with little temp change. 		Tonight

Tonight: Patchy Fog then Areas Of Frost
Patchy Fog then Areas Of Frost

Lo 34°F 		NWS forecast: Patchy fog between 7pm and 11pm, then areas of frost and patchy fog. Clear, with a low around 34. East northeast wind around 2 mph.
 NWS Short Term Weather Forecast
M.L. King
Jr. Day
M.L. King Jr. Day: Widespread Frost then Sunny
Widespread Frost then Sunny
Monday
Night
Monday Night: Patchy Fog then Areas Of Frost
Patchy Fog then Areas Of Frost
Tuesday

Tuesday: Widespread Frost then Mostly Sunny
Widespread Frost then Mostly Sunny
Tuesday
Night
Tuesday Night: Areas Of Frost
Areas Of Frost
Wednesday

Wednesday: Areas Of Frost then Partly Sunny
Areas Of Frost then Partly Sunny
Wednesday
Night
Wednesday Night: Areas Of Frost then Slight Chance Light Rain
Areas Of Frost then Slight Chance Light Rain
Thursday

Thursday: Chance Light Rain
Chance Light Rain
Hi 51°F Lo 33°F Hi 50°F Lo 35°F Hi 48°F Lo 35°F Hi 47°F
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