- >>Weather by month // weather averages Seattle
- >>Climate graph // Weather by Month Seattle
- >>average temperature by month Seattle
- >>Weather Seattle
- >>Water temperature Seattle
Seattle is located in the northern hemisphere. The balmy days of Summer commence at the end of June and conclude in September. This period encompasses the months: June, July, August, September.
Climate graph // Weather by Month Seattle
The driest month is July, with 29 mm | 1.1 inch of rainfall. Most of the precipitation here falls in November, averaging 206 mm | 8.1 inch.
average temperature by month Seattle
The warmest month of the year is August, with an average temperature of 19.3 °C | 66.7 °F. December is the coldest month, with temperatures averaging 4.2 °C | 39.6 °F.
Weather by month // weather averages Seattle
| Avg. Temperature °C (°F) | Min. Temperature °C (°F) | Max. Temperature °C (°F) | Precipitation / Rainfall mm (in) | Humidity (%) | Rainy days (d) | avg. Sun hours (hours) | |
|---|---|---|---|---|---|---|---|
| January |
4.5 (40) |
2.2 (35.9) |
7.8 (46) |
181 (7.1) |
84% | 14 | 4.0 |
| February |
4.8 (40.6) |
1.8 (35.2) |
8.9 (48.1) |
127 (5) |
83% | 11 | 6.0 |
| March |
6.8 (44.2) |
3.5 (38.3) |
11.5 (52.6) |
145 (5.7) |
80% | 14 | 7.0 |
| April |
9.1 (48.4) |
5.2 (41.3) |
14.4 (57.9) |
122 (4.8) |
75% | 12 | 8.0 |
| May |
12.7 (54.9) |
8.4 (47.2) |
18.1 (64.6) |
81 (3.2) |
72% | 10 | 9.0 |
| June |
15.7 (60.2) |
11.4 (52.5) |
21.1 (69.9) |
66 (2.6) |
70% | 8 | 9.0 |
| July |
19 (66.2) |
14 (57.2) |
25.1 (77.2) |
29 (1.1) |
65% | 4 | 9.0 |
| August |
19.3 (66.7) |
14.4 (57.9) |
25.5 (77.8) |
37 (1.5) |
65% | 4 | 9.0 |
| September |
15.8 (60.5) |
11.7 (53) |
21.4 (70.4) |
67 (2.6) |
73% | 6 | 8.0 |
| October |
11.1 (52) |
8 (46.5) |
15.4 (59.6) |
143 (5.6) |
82% | 11 | 6.0 |
| November |
6.9 (44.5) |
4.6 (40.3) |
10.2 (50.3) |
206 (8.1) |
84% | 14 | 5.0 |
| December |
4.2 (39.6) |
2.1 (35.8) |
7 (44.7) |
182 (7.2) |
83% | 13 | 4.0 |
| January | February | March | April | May | June | July | August | September | October | November | December | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg. Temperature °C (°F) |
4.5 °C (40) °F |
4.8 °C (40.6) °F |
6.8 °C (44.2) °F |
9.1 °C (48.4) °F |
12.7 °C (54.9) °F |
15.7 °C (60.2) °F |
19 °C (66.2) °F |
19.3 °C (66.7) °F |
15.8 °C (60.5) °F |
11.1 °C (52) °F |
6.9 °C (44.5) °F |
4.2 °C (39.6) °F |
| Min. Temperature °C (°F) |
2.2 °C (35.9) °F |
1.8 °C (35.2) °F |
3.5 °C (38.3) °F |
5.2 °C (41.3) °F |
8.4 °C (47.2) °F |
11.4 °C (52.5) °F |
14 °C (57.2) °F |
14.4 °C (57.9) °F |
11.7 °C (53) °F |
8 °C (46.5) °F |
4.6 °C (40.3) °F |
2.1 °C (35.8) °F |
| Max. Temperature °C (°F) |
7.8 °C (46) °F |
8.9 °C (48.1) °F |
11.5 °C (52.6) °F |
14.4 °C (57.9) °F |
18.1 °C (64.6) °F |
21.1 °C (69.9) °F |
25.1 °C (77.2) °F |
25.5 °C (77.8) °F |
21.4 °C (70.4) °F |
15.4 °C (59.6) °F |
10.2 °C (50.3) °F |
7 °C (44.7) °F |
| Precipitation / Rainfall mm (in) |
181 (7) |
127 (5) |
145 (5) |
122 (4) |
81 (3) |
66 (2) |
29 (1) |
37 (1) |
67 (2) |
143 (5) |
206 (8) |
182 (7) |
| Humidity(%) | 84% | 83% | 80% | 75% | 72% | 70% | 65% | 65% | 73% | 82% | 84% | 83% |
| Rainy days (d) | 13 | 11 | 13 | 12 | 9 | 8 | 5 | 4 | 6 | 12 | 13 | 13 |
| avg. Sun hours (hours) | 4.5 | 5.7 | 6.7 | 8.2 | 9.0 | 8.9 | 9.4 | 8.8 | 7.8 | 6.2 | 4.9 | 4.3 |
Data: 1991 - 2021 Min. Temperature °C (°F), Max. Temperature °C (°F), Precipitation / Rainfall mm (in), Humidity, Rainy days. Data: 1999 - 2019: avg. Sun hours
The difference in precipitation between the driest month and the wettest month is 177 mm | 7 inch. Throughout the year, temperatures vary by 15.1 °C | 27.1 °F.
The month with the highest relative humidity is January (84.11 %). The month with the lowest relative humidity is July (64.52 %). The wettest month is November (17.87 days). The driest month is August (5.60 days).
Seattle weather and climate for every month
Hours of sunshine in Seattle
- avg. hours of sun
- Total hours of sun
In this location, the month that receives most sunshine is July, with a mean number of daily hours being 9.43. Across the entire duration of said calendar period there are an aggregate total of 292.47 hours' worth of sunlight.
In Seattle, the month that experiences the least number of daily sunshine hours is January with an average duration of 4.31 hours per day. The total amount of sunlight recorded during this period in question stands at a sum total of 133.51.
In Seattle, an average of 84.48 hours of sunshine are counted per month and around 2571.8 hours throughout the year.
Water temperature Seattle(Salish Sea)
| Max. Water temperature °C (°F) | Avg. Water Temperature °C (°F) | Min. Water Temperature °C (°F) | |
|---|---|---|---|
| January |
7.9 46.2 |
7.7 45.9 |
7.6 45.7 |
| February |
7.7 45.9 |
7.6 45.7 |
7.6 45.7 |
| March |
8 46.4 |
7.9 46.2 |
7.8 46 |
| April |
9 48.2 |
8.3 46.9 |
7.9 46.2 |
| May |
9.9 49.8 |
9.6 49.3 |
9 48.2 |
| June |
11.5 52.7 |
10.5 50.9 |
9.8 49.6 |
| July |
12.7 54.9 |
12.2 54 |
11.7 53.1 |
| August |
13.1 55.6 |
12.8 55 |
12.5 54.5 |
| September |
12.6 54.7 |
12.3 54.1 |
11.9 53.4 |
| October |
11.6 52.9 |
10.7 51.3 |
10 50 |
| November |
9.9 49.8 |
9.4 48.9 |
8.8 47.8 |
| December |
8.7 47.7 |
8.3 46.9 |
7.9 46.2 |
| January | February | March | April | May | June | July | August | September | October | November | December | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min. Water Temperature °C (°F) |
7.6 45.7 |
7.6 45.7 |
7.8 46 |
7.9 46.2 |
9 48.2 |
9.8 49.6 |
11.7 53.1 |
12.5 54.5 |
11.9 53.4 |
10 50 |
8.8 47.8 |
7.9 46.2 |
| Avg. Water Temperature °C (°F) |
7.7 45.9 |
7.6 45.7 |
7.9 46.2 |
8.3 46.9 |
9.6 49.3 |
10.5 50.9 |
12.2 54 |
12.8 55 |
12.3 54.1 |
10.7 51.3 |
9.4 48.9 |
8.3 46.9 |
| Max. Water temperature °C (°F) |
7.9 46.2 |
7.7 45.9 |
8 46.4 |
9 48.2 |
9.9 49.8 |
11.5 52.7 |
12.7 54.9 |
13.1 55.6 |
12.6 54.7 |
11.6 52.9 |
9.9 49.8 |
8.7 47.7 |
In Seattle (Salish Sea), a water temperature of about 9.80°C | 49.64°F is achieved in the annual average.
The lowest water temperatures per month are reached in January at around 7.60°C | 45.68°F. The average highest water temperatures are around 13.10°C | 55.58°F and are measured during August.
At about 13.10°C | 55.58°F is the maximum water temperature of the year. This is reached around August 07. The minimum value is 7.60°C | 45.68°F and is measured around the date of January 09.
The closest water of Seattle is Salish Sea.
Airport close to Seattle
The closest Airports of Seattle are: Boeing Field (BFI) 7.67km,Seattle–Tacoma International Airport (SEA) 17.92km,William R. Fairchild International Airport (CLM) 104.26km
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