Multnomah County Climate and Average Weather
Climate of Multnomah County: average temperatures, rainfall and seasons month by month.
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 | 84° | 60° | 0,6 in | ★★★★★ |
| September | 76° | 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).
Recent extremes in Multnomah County
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Multnomah County compares with nearby places
Annual averages, and the difference against Multnomah County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Portland | 0 mi | 54°F | about the same | 56 in |
| ZIP Code 97205 | 1 mi | 54°F | about the same | 56 in |
| Portland International Airport | 7 mi | 54°F | about the same | 61 in |
| Columbia River | 8 mi | 54°F | about the same | 54 in |
| Silver Falls State Park | 44 mi | 51°F | 35°F cooler | 79 in |
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.
What this means for Multnomah County
Today is cooler than average for August. The forecast high of 74°F is 9.7°F below the 84°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 64°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, November and December - historically the least comfortable months here.
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 67°F (20°C) in Multnomah County with clear. It feels like 67°F. Today runs from 61°F to 74°F. Chance of precipitation is 2%. Sightseeing conditions score 9.6/10 - 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. August 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 cooler than average for August. The forecast high of 74°F is 9.7°F below the 84°F typical for this month. The best window to be outside is roughly 9 AM to 12 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Multnomah County today at 9.9/10. 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.
Quick facts about Multnomah County
| Type | County |
|---|---|
| State | Oregon |
| Country | United States |
| Continent | North America |
| Coordinates | 45°30′54.7″N 122°40′42.2″W (45.5152, -122.6784) |
| Population | 800.000 |
| Local time | 6:34 AM (UTC-07:00) |
| Best months | June, July and August |
| Climate | Temperate |
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.
Explore Multnomah County
Every topic we hold for this place, and the same topic for the places around it.
Climate 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 67°F (20°C) with clear. Humidity is 68% and wind is 6 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 6:34 AM.
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 August 24, 2026 at 6:34 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
