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Portland, Oregon Climate Guide to the Average Weather & Temperatures with Graphs Elucidating Sunshine and Rainfall Data & Information about Wind Speeds & Humidity:
- Portland, Oregon, Usa latitude & longitude; 45°32'N 122°40'W.
- Altitude; 9 m (30 ft).
- The average temperature in Portland, Oregon, Usa is 12.6 °C (55 °F).
- The range of average monthly temperatures is 15.5 °C.
- The warmest average max/ high temperature is 26 °C (79 °F) in July & August.
- The coolest average min/ low temperature is 2 °C (36 °F) in January.
- Portland, Oregon receives on average 1074 mm (42.3 in) of precipitation annually or 90 mm (3.5 in) each month.
- On balance there are 140 days annually on which greater than 0.1 mm (0.004 in) of precipitation (rain, sleet, snow or hail) occurrs or 11.7 days on an average month.
- The month with the driest weather is July when on balance 10 mm (0.4 in) of rain, sleet, hail or snow falls across 3 days.
- The month with the wettest weather is December when on balance 188 mm (7.4 in) of rain, sleet, hail or snow falls across 19 days.
- Mean relative humidity for an average year is recorded as 69.7% and on a monthly basis it ranges from 59% in July to 82% in December.
- There is an average range of hours of sunshine in Portland, Oregon of between 1.8 hours per day in January & December and 10.5 hours per day in July.
- On balance there are 1953 sunshine hours annually and approximately 5.4 sunlight hours for each day.
- On balance there are 44 days annually registering frost in Portland, Oregon and in January there are on average 13 days with frost.
Portland, Oregon Climate Graph (Metric | Imperial units)
Add the Portland, Oregon Climate Graph (metric) to your web page!
Use our metric climate graph for Portland, Oregon on your travel or accommodation website to help people thinking of booking a flight or hotel, renting a villa or purchasing property etc. (a back link is required):
Portland, Oregon Weather Averages
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Average Minimum Temperatures in Portland, Oregon, Usa (°C) |
Average Maximum Temperature in Portland, Oregon, Usa (°C) |
Portland, Oregon Average Temperature (°C) |
Average Sea Temp (°C) |
Average Precipitation/ Rainfall (mm) |
Wet Days (>0.1 mm) |
Average Sunlight Hours/ Day |
Relative Humidity (%) |
Average Wind Speed in Portland, Oregon (Beaufort) |
Average Number of Days with Frost |
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| Weather in Portland, Oregon in January |
2 |
7 |
4.5 |
- |
161 |
18 |
1.8 |
79 |
3 |
13 |
Average Temperature in Portland, Oregon in January |
| Weather in Portland, Oregon in February |
3 |
10 |
6.5 |
- |
124 |
15 |
3.3 |
77 |
3 |
9 |
Average Temperature in Portland, Oregon in February |
| Weather in Portland, Oregon in March |
5 |
13 |
9 |
- |
121 |
17 |
4.0 |
71.0 |
3 |
6 |
Average Temperature in Portland, Oregon in March |
| Weather in Portland, Oregon in April |
7 |
17 |
12 |
- |
62 |
12 |
6.3 |
63 |
2 |
1 |
Average Temperature in Portland, Oregon in April |
| Weather in Portland, Oregon in May |
10 |
20 |
15 |
- |
52 |
10 |
7.1 |
61 |
2 |
0 |
Average Temperature in Portland, Oregon in May |
| Weather in Portland, Oregon in June |
12 |
23 |
18 |
- |
42 |
9 |
6.7 |
62 |
2 |
0 |
Average Temperature in Portland, Oregon in June |
| Weather in Portland, Oregon in July |
14 |
26 |
20 |
- |
10 |
3 |
10.5 |
59 |
2 |
0 |
Average Temperature in Portland, Oregon in July |
| Weather in Portland, Oregon in August |
14 |
26 |
20 |
- |
18 |
4 |
8.4 |
61 |
2 |
0 |
Average Temperature in Portland, Oregon in August |
| Weather in Portland, Oregon in September |
13 |
23 |
18 |
- |
44 |
6 |
7.1 |
65 |
2 |
0 |
Average Temperature in Portland, Oregon in September |
| Weather in Portland, Oregon in October |
10 |
18 |
14 |
- |
99 |
12 |
4.2 |
76 |
2 |
1 |
Average Temperature in Portland, Oregon in October |
| Weather in Portland, Oregon in November |
5 |
11 |
8 |
- |
153 |
15 |
2.9 |
80 |
3 |
5 |
Average Temperature in Portland, Oregon in November |
| Weather in Portland, Oregon in December |
4 |
9 |
6.5 |
- |
188 |
19 |
1.8 |
82 |
3 |
9 |
Average Temperature in Portland, Oregon in December |
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Add the Portland, Oregon Climograph/ Climate Chart (imperial) to your web page!
Use our imperial climate chart for Portland, Oregon on your travel or accommodation website to help people thinking of booking a flight or hotel, renting a villa or purchasing property etc. (a back link is required):
Portland, Oregon Temperatures in Farenheit
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Average Minimum Temperatures in Portland, Oregon, Usa (°F) |
Average Maximum Temperature in Portland, Oregon, Usa (°F) |
Average Temperature (°F) |
Average Sea Temp (°F) |
Average Precipitation/ Rainfall (in) |
Wet Days (>0.004 in) |
Average Sunlight Hours/ Day |
Relative Humidity (%) |
Average Wind Speed (Beaufort) |
Average Number of Days with Frost |
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| Temperatures in Portland, Oregon in January |
36 |
45 |
40 |
- |
6.3 |
18 |
1.8 |
79 |
3 |
13 |
Climate in Portland, Oregon in January |
| Temperatures in Portland, Oregon in February |
37 |
50 |
44 |
- |
4.9 |
15 |
3.3 |
77 |
3 |
9 |
Climate in Portland, Oregon in February |
| Temperatures in Portland, Oregon in March |
41 |
55 |
48 |
- |
4.8 |
17 |
4.0 |
71 |
3 |
6 |
Climate in Portland, Oregon in March |
| Temperatures in Portland, Oregon in April |
45 |
63 |
54 |
- |
2.4 |
12 |
6.3 |
63 |
2 |
1 |
Climate in Portland, Oregon in April |
| Temperatures in Portland, Oregon in May |
50 |
68 |
59 |
- |
2.0 |
10 |
7.1 |
61 |
2 |
0 |
Climate in Portland, Oregon in May |
| Temperatures in Portland, Oregon in June |
54 |
73 |
64 |
- |
1.7 |
9 |
6.7 |
62 |
2 |
0 |
Climate in Portland, Oregon in June |
| Temperatures in Portland, Oregon in July |
57 |
79 |
68 |
- |
0.4 |
3 |
10.5 |
59 |
2 |
0 |
Climate in Portland, Oregon in July |
| Temperatures in Portland, Oregon in August |
57 |
79 |
68 |
- |
0.7 |
4 |
8.4 |
61 |
2 |
0 |
Climate in Portland, Oregon in August |
| Temperatures in Portland, Oregon in September |
55 |
73 |
64 |
- |
1.7 |
6 |
7.1 |
65 |
2 |
0 |
Climate in Portland, Oregon in September |
| Temperatures in Portland, Oregon in October |
50 |
64 |
57 |
- |
3.9 |
12 |
4.2 |
76 |
2 |
1 |
Climate in Portland, Oregon in October |
| Temperatures in Portland, Oregon in November |
41 |
52 |
46 |
- |
6.0 |
15 |
2.9 |
80 |
3 |
5 |
Climate in Portland, Oregon in November |
| Temperatures in Portland, Oregon in December |
39 |
48 |
44 |
- |
7.4 |
19 |
1.8 |
82 |
3 |
9 |
Climate in Portland, Oregon in December |
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