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Seattle, Washington Climate Guide to the Average Weather & Temperatures with Graphs Elucidating Sunshine and Rainfall Data & Information about Wind Speeds & Humidity:
- Seattle, Washington, Usa latitude & longitude; 47°32'N 122°18'W.
- Altitude; 4 m (13 ft).
- The average temperature in Seattle, Washington, Usa is 11.5 °C (53 °F).
- The range of average monthly temperatures is 13.5 °C.
- The warmest average max/ high temperature is 24 °C (75 °F) in July & August.
- The coolest average min/ low temperature is 2 °C (36 °F) in January.
- Seattle, Washington receives on average 919 mm (36.2 in) of precipitation annually or 77 mm (3.0 in) each month.
- On balance there are 150 days annually on which greater than 0.1 mm (0.004 in) of precipitation (rain, sleet, snow or hail) occurrs or 12.5 days on an average month.
- The month with the driest weather is July when on balance 17 mm (0.7 in) of rain, sleet, hail or snow falls across 5 days.
- The month with the wettest weather is December when on balance 145 mm (5.7 in) of rain, sleet, hail or snow falls across 19 days.
- Mean relative humidity for an average year is recorded as 70.0% and on a monthly basis it ranges from 60% in May to 81% in December.
- There is an average range of hours of sunshine in Seattle, Washington of between 1.9 hours per day in December and 10.2 hours per day in July.
- On balance there are 2044 sunshine hours annually and approximately 5.6 sunlight hours for each day.
Seattle, Washington Climate Graph (Metric | Imperial units)
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Use our metric climate graph for Seattle, Washington 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):
Seattle, Washington Weather Averages
| |
Average Minimum Temperatures in Seattle, Washington, Usa (°C) |
Average Maximum Temperature in Seattle, Washington, Usa (°C) |
Seattle, Washington 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 Seattle, Washington (Beaufort) |
Average Number of Days with Frost |
|
| Weather in Seattle, Washington in January |
2 |
8 |
5 |
- |
139 |
19 |
2.0 |
78 |
2 |
- |
Average Temperature in Seattle, Washington in January |
| Weather in Seattle, Washington in February |
3 |
9 |
6 |
- |
107 |
15 |
3.6 |
75 |
2 |
- |
Average Temperature in Seattle, Washington in February |
| Weather in Seattle, Washington in March |
4 |
12 |
8 |
- |
90 |
16 |
5.3 |
69.0 |
3 |
- |
Average Temperature in Seattle, Washington in March |
| Weather in Seattle, Washington in April |
6 |
15 |
11 |
- |
55 |
12 |
6.9 |
61 |
3 |
- |
Average Temperature in Seattle, Washington in April |
| Weather in Seattle, Washington in May |
9 |
19 |
14 |
- |
40 |
11 |
7.6 |
60 |
2 |
- |
Average Temperature in Seattle, Washington in May |
| Weather in Seattle, Washington in June |
11 |
21 |
16 |
- |
36 |
9 |
7.8 |
61 |
2 |
- |
Average Temperature in Seattle, Washington in June |
| Weather in Seattle, Washington in July |
13 |
24 |
19 |
- |
17 |
5 |
10.2 |
61 |
2 |
- |
Average Temperature in Seattle, Washington in July |
| Weather in Seattle, Washington in August |
13 |
24 |
18.5 |
- |
19 |
5 |
8.1 |
67 |
2 |
- |
Average Temperature in Seattle, Washington in August |
| Weather in Seattle, Washington in September |
11 |
21 |
16 |
- |
46 |
8 |
6.5 |
70 |
2 |
- |
Average Temperature in Seattle, Washington in September |
| Weather in Seattle, Washington in October |
8 |
16 |
12 |
- |
88 |
14 |
4.4 |
77 |
2 |
- |
Average Temperature in Seattle, Washington in October |
| Weather in Seattle, Washington in November |
5 |
11 |
8 |
- |
137 |
17 |
2.8 |
80 |
2 |
- |
Average Temperature in Seattle, Washington in November |
| Weather in Seattle, Washington in December |
3 |
9 |
6 |
- |
145 |
19 |
1.9 |
81 |
2 |
- |
Average Temperature in Seattle, Washington in December |
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Add the Seattle, Washington Climograph/ Climate Chart (imperial) to your web page!
Use our imperial climate chart for Seattle, Washington 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):
Seattle, Washington Temperatures in Farenheit
| |
Average Minimum Temperatures in Seattle, Washington, Usa (°F) |
Average Maximum Temperature in Seattle, Washington, 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 Seattle, Washington in January |
36 |
46 |
41 |
- |
5.5 |
19 |
2.0 |
78 |
2 |
- |
Climate in Seattle, Washington in January |
| Temperatures in Seattle, Washington in February |
37 |
48 |
43 |
- |
4.2 |
15 |
3.6 |
75 |
2 |
- |
Climate in Seattle, Washington in February |
| Temperatures in Seattle, Washington in March |
39 |
54 |
46 |
- |
3.5 |
16 |
5.3 |
69 |
3 |
- |
Climate in Seattle, Washington in March |
| Temperatures in Seattle, Washington in April |
43 |
59 |
51 |
- |
2.2 |
12 |
6.9 |
61 |
3 |
- |
Climate in Seattle, Washington in April |
| Temperatures in Seattle, Washington in May |
48 |
66 |
57 |
- |
1.6 |
11 |
7.6 |
60 |
2 |
- |
Climate in Seattle, Washington in May |
| Temperatures in Seattle, Washington in June |
52 |
70 |
61 |
- |
1.4 |
9 |
7.8 |
61 |
2 |
- |
Climate in Seattle, Washington in June |
| Temperatures in Seattle, Washington in July |
55 |
75 |
65 |
- |
0.7 |
5 |
10.2 |
61 |
2 |
- |
Climate in Seattle, Washington in July |
| Temperatures in Seattle, Washington in August |
55 |
75 |
65 |
- |
0.7 |
5 |
8.1 |
67 |
2 |
- |
Climate in Seattle, Washington in August |
| Temperatures in Seattle, Washington in September |
52 |
70 |
61 |
- |
1.8 |
8 |
6.5 |
70 |
2 |
- |
Climate in Seattle, Washington in September |
| Temperatures in Seattle, Washington in October |
46 |
61 |
54 |
- |
3.5 |
14 |
4.4 |
77 |
2 |
- |
Climate in Seattle, Washington in October |
| Temperatures in Seattle, Washington in November |
41 |
52 |
46 |
- |
5.4 |
17 |
2.8 |
80 |
2 |
- |
Climate in Seattle, Washington in November |
| Temperatures in Seattle, Washington in December |
37 |
48 |
43 |
- |
5.7 |
19 |
1.9 |
81 |
2 |
- |
Climate in Seattle, Washington in December |
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