Multnomah County Weather Forecast
Multnomah County weather: 64°F, clear sky. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
Multnomah County is a county in Oregon. Multnomah County is a county in the United States. It has a population of about 800.000.
Right now it is 64°F (18°C) in Multnomah County with clear sky. It feels like 65°F. Today runs from 56°F to 68°F. Chance of precipitation is 5%. Sightseeing conditions score 9.7/10 - excellent - go now.
The best time to visit Multnomah County is June, July and August. The climate is temperate. January, November and December tend to be the least comfortable months. July is the warmest month with average highs near 84°F, while January is the coldest with lows near 34°F.
The closest major airport is Portland International Airport (PDX), about 7 mi away. Nearby highlights include Columbia River, Silver Falls State Park, Mount Hood and Cannon Beach.
In plain terms. Today is slightly cooler than average for September. The forecast high of 68°F is 6.3°F below the 74°F typical for this month. The best window to be outside is roughly 2 PM to 5 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in Multnomah County today at 9.7/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Weather in Multnomah County right now
Wear sunglasses and use SPF 30+ if you are outside for long.
Source: Open-Meteo. Updated 4:07 PM, Sep 30 local time.
See the Multnomah County forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for Multnomah County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Wed, Sep 30 | ☁️ Overcast | 68° / 56° | 5% | 8 mph | 5 |
| Thu, Oct 1 | ☁️ Overcast | 72° / 53° | 3% | 10 mph | 4 |
| Fri, Oct 2 | ☁️ Overcast | 79° / 57° | 0% | 8 mph | 5 |
| Sat, Oct 3 | ☁️ Overcast | 82° / 56° | 0% | 8 mph | 5 |
| Sun, Oct 4 | ☁️ Overcast | 83° / 57° | 0% | 7 mph | 5 |
| Mon, Oct 5 | ☁️ Overcast | 79° / 58° | 0% | 8 mph | 4 |
| Tue, Oct 6 | ☁️ Overcast | 78° / 57° | 1% | 6 mph | 4 |
| Wed, Oct 7 | 🌤️ Mainly clear | 82° / 54° | 3% | 4 mph | 4 |
| Thu, Oct 8 | ☀️ Clear sky | 81° / 55° | 3% | 4 mph | 4 |
| Fri, Oct 9 | ☁️ Overcast | 74° / 55° | 1% | 8 mph | 4 |
| Sat, Oct 10 | ⛅ Partly cloudy | 68° / 50° | 2% | 7 mph | 4 |
| Sun, Oct 11 | ☀️ Clear sky | 72° / 48° | 10% | 9 mph | 4 |
| Mon, Oct 12 | ☁️ Overcast | 75° / 52° | 13% | 7 mph | 4 |
| Tue, Oct 13 | ☀️ Clear sky | 73° / 51° | 16% | 7 mph | 4 |
| Wed, Oct 14 | ☀️ Clear sky | 78° / 51° | 16% | 5 mph | 4 |
| Thu, Oct 15 | 🌤️ Mainly clear | 75° / 55° | 23% | 7 mph | 4 |
Climate in Multnomah County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 46° | 34° | 6,9 in | ★★☆☆☆ |
| February | 49° | 37° | 6,7 in | ★★☆☆☆ |
| March | 55° | 40° | 6,5 in | ★★☆☆☆ |
| April | 61° | 43° | 3,0 in | ★★★★☆ |
| May | 68° | 48° | 2,5 in | ★★★★☆ |
| June | 75° | 54° | 2,0 in | ★★★★☆ |
| July | 84° | 59° | 0,3 in | ★★★★★ |
| August | 83° | 60° | 0,5 in | ★★★★★ |
| September | 74° | 55° | 2,0 in | ★★★★☆ |
| October | 62° | 47° | 5,9 in | ★★★☆☆ |
| November | 52° | 42° | 8,6 in | ★★☆☆☆ |
| December | 49° | 41° | 10,8 in | ★☆☆☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Weather map for Multnomah County
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in Multnomah County
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit Multnomah County
Go in June, July and August. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, November and December - expect the least comfortable mix of heat, cold or rain.
Explore Multnomah County
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Multnomah County?
Multnomah County is a county in Oregon. Its coordinates are 45.5152, -122.6784. It lies in North America.
What is the weather like in Multnomah County right now?
It is currently 64°F (18°C) with clear sky. Humidity is 72% and wind is 4 mph.
When is the best time to visit Multnomah County?
June, July and August offer the most comfortable conditions in Multnomah County, which has a temperate climate. January, November and December are usually the hardest months for outdoor plans.
What time zone is Multnomah County in?
Multnomah County observes America/Los_Angeles (UTC-07:00). The local time is 4:07 PM.
How many people live in Multnomah County?
Multnomah County has a population of approximately 800.000.
What is the nearest airport to Multnomah County?
The closest airports are Portland International Airport (PDX), 7 mi away, Seattle-Tacoma International Airport (SEA), 135 mi away and Vancouver International Airport (YVR), 255 mi away.
What are the top things to do in Multnomah County?
Popular options include Columbia River, Silver Falls State Park, Mount Hood, Cannon Beach, Mount Rainier and Mount Rainier National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated September 30, 2026 at 4:07 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
