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Seattle, USA Weather Averages

July is the hottest month in Seattle with an average temperature of 18°C (64°F) and the coldest is January at 5°C (41°F) with the most daily sunshine hours at 10 in July. The wettest month is December with an average of 150mm of rain. The best month to swim in the sea is in July when the average sea temperature is 14°C (57°F).

Average Temperature Seattle

What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month

Average High Low Temperature Seattle

What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

Average Rainfall Seattle

What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

Average Daily Sunshine Hours Seattle

What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer
What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer

Average Sea Temperature Seattle

What is Average Sea Temperature?
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface
What is Average Sea Temperature?
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface

Seattle : Next 24-Hour Weather

Tomorrow - 12th December 2024

Sunrise 07:49

Sunrise

Sunset 16:18

Sunset
21:00
Mist
7°C (44°F)
22:00
Overcast
6°C (43°F)
23:00
Overcast
6°C (42°F)

Tomorrow - 13th December 2024

Sunrise 07:49

Sunrise

Sunset 16:18

Sunset
0:00
Mist
6°C (42°F)
1:00
Fog
6°C (42°F)
2:00
Mist
6°C (42°F)
3:00
Overcast
6°C (43°F)
4:00
Cloudy
7°C (43°F)
5:00
Partly cloudy
6°C (43°F)
6:00
Partly cloudy
6°C (43°F)
7:00
Overcast
6°C (42°F)
8:00
Overcast
6°C (42°F)
9:00
Overcast
6°C (42°F)
10:00
Overcast
6°C (43°F)
11:00
Overcast
7°C (43°F)
12:00
Overcast
7°C (44°F)
13:00
Overcast
7°C (44°F)
14:00
Overcast
7°C (44°F)
15:00
Overcast
7°C (44°F)
16:00
Overcast
7°C (44°F)
17:00
Light rain
7°C (44°F)
18:00
Overcast
8°C (45°F)
19:00
Overcast
8°C (45°F)
20:00
Overcast
8°C (45°F)