As of 12:36 PST

Weather in SeaTac, WA

58°

SeaTac, Thursday, 12 November, 12:36

Overcast. Feels like 57°. High 58°, low 50°.

Pressure29.65 inHg

Wind6.9 mph SE

Humidity78%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

Monthly outlook for SeaTac, WA: average high 47.7°, average low 39.9°. That is 0.1° above the climate normal for November. Precipitation is expected on 6 days (about 1.1 inches), against a normal of 10 days and 4.3 inches. The warmest day looks like 13 November (59.9°), the coolest 26 November (31.3°).

47.7°/39.9°

Average high / low

+0.1°

Above normal

6 / 10

Wet days / normal

1.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
12 November – 21 November	50.3°	48.6°	+1°
22 November – 1 December	43.4°	45.5°	-1.1°
2 December – 11 December	at normal	44°	—

November records over 66 years

65.8°2 November 1962All-time high

0.5°23 November 1985All-time low

Climate normals and records are computed from the nearest reference point — Riverton (4 mi).

Fri, 1360° / 52°

0.04

60 °

SeaTac, Friday, 13 November

Light rain. High 60°, low 52°.

Pressure29.32 inHg

Wind6.8 mph S

Humidity80%

Visibility6.2 mi

Dew point49°

Sat, 1456° / 48°

0.12

56 °

SeaTac, Saturday, 14 November

Rain. High 56°, low 48°.

Pressure29.71 inHg

Wind5.6 mph S

Humidity84%

Visibility4.2 mi

Dew point50°

Sun, 1555° / 44°

0.25

55 °

SeaTac, Sunday, 15 November

Rain. High 55°, low 44°.

Pressure29.83 inHg

Wind10.8 mph SW

Humidity71%

Visibility6.2 mi

Dew point45°

Mon, 1648° / 40°

0.23

48 °

SeaTac, Monday, 16 November

Light rain. High 48°, low 40°.

Pressure30.03 inHg

Wind11.5 mph S

Humidity77%

Visibility6.2 mi

Dew point41°

Tue, 1747° / 38°

47 °

SeaTac, Tuesday, 17 November

Mostly clear. High 47°, low 38°.

Pressure30.09 inHg

Wind10.1 mph E

Humidity79%

Visibility—

Dew point35°

Wed, 1844° / 42°

0.32

44 °

SeaTac, Wednesday, 18 November

Rain. High 44°, low 42°.

Pressure29.91 inHg

Wind7.9 mph E

Humidity81%

Visibility—

Dew point38°

Thu, 1945° / 42°

0.03

45 °

SeaTac, Thursday, 19 November

Light rain. High 45°, low 42°.

Pressure30.24 inHg

Wind3.1 mph NW

Humidity87%

Visibility—

Dew point40°

Fri, 2045° / 38°

45 °

SeaTac, Friday, 20 November

Overcast. High 45°, low 38°.

Pressure30.33 inHg

Wind3.6 mph N

Humidity85%

Visibility—

Dew point37°

Sat, 2146° / 36°

46 °

SeaTac, Saturday, 21 November

Clear. High 46°, low 36°.

Pressure30.24 inHg

Wind2.2 mph N

Humidity78%

Visibility—

Dew point34°

Sun, 2243° / 38°

43 °

SeaTac, Sunday, 22 November

Partly cloudy. High 43°, low 38°.

Pressure30.18 inHg

Wind10 mph S

Humidity69%

Visibility—

Dew point32°

Mon, 2344° / 38°

0.04

44 °

SeaTac, Monday, 23 November

Light rain. High 44°, low 38°.

Pressure30.21 inHg

Wind7.2 mph SW

Humidity81%

Visibility—

Dew point36°

Tue, 2444° / 34°

44 °

SeaTac, Tuesday, 24 November

Clear. High 44°, low 34°.

Pressure30.42 inHg

Wind6.2 mph N

Humidity68%

Visibility—

Dew point29°

Wed, 2543° / 32°

43 °

SeaTac, Wednesday, 25 November

Clear. High 43°, low 32°.

Pressure30.45 inHg

Wind5.3 mph N

Humidity54%

Visibility—

Dew point22°

Thu, 2645° / 31°

45 °

SeaTac, Thursday, 26 November

Clear. High 45°, low 31°.

Pressure30.24 inHg

Wind2.3 mph E

Humidity44%

Visibility—

Dew point17°

Fri, 2741° / 38°

0.07

41 °

SeaTac, Friday, 27 November

Light rain. High 41°, low 38°.

Pressure30.24 inHg

Wind4.1 mph NE

Humidity82%

Visibility—

Dew point35°

From day 17 onward the outlook is built from 60-year climate statistics

Sat, 2845° / 36°

0.2

45 °

SeaTac, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high45°

Average low36°

Average precipitation0.2 in

Chance of precipitation58%

Record high57° (2021)

Record low17° (1985)

Sun, 2945° / 35°

0.21

45 °

SeaTac, Sunday, 29 November

Climate normal for this date — 60-year average.

Average high45°

Average low35°

Average precipitation0.21 in

Chance of precipitation52%

Record high56° (2021)

Record low8° (1985)

Mon, 3045° / 36°

0.24

45 °

SeaTac, Monday, 30 November

Climate normal for this date — 60-year average.

Average high45°

Average low36°

Average precipitation0.24 in

Chance of precipitation63%

Record high56° (2008)

Record low9° (1985)

Tue, 0145° / 37°

0.25

45 °

SeaTac, Tuesday, 1 December

Climate normal for this date — 60-year average.

Average high45°

Average low37°

Average precipitation0.25 in

Chance of precipitation62%

Record high55° (2021)

Record low6° (1985)

Wed, 0245° / 36°

0.31

45 °

SeaTac, Wednesday, 2 December

Climate normal for this date — 60-year average.

Average high45°

Average low36°

Average precipitation0.31 in

Chance of precipitation68%

Record high54° (2021)

Record low20° (1985)

Thu, 0345° / 36°

0.31

45 °

SeaTac, Thursday, 3 December

Climate normal for this date — 60-year average.

Average high45°

Average low36°

Average precipitation0.31 in

Chance of precipitation57%

Record high56° (1965)

Record low26° (1984)

Fri, 0444° / 35°

0.27

44 °

SeaTac, Friday, 4 December

Climate normal for this date — 60-year average.

Average high44°

Average low35°

Average precipitation0.27 in

Chance of precipitation55%

Record high57° (2023)

Record low17° (1970)

Sat, 0543° / 35°

0.19

43 °

SeaTac, Saturday, 5 December

Climate normal for this date — 60-year average.

Average high43°

Average low35°

Average precipitation0.19 in

Chance of precipitation47%

Record high59° (2023)

Record low23° (1994)

Sun, 0644° / 35°

0.19

44 °

SeaTac, Sunday, 6 December

Climate normal for this date — 60-year average.

Average high44°

Average low35°

Average precipitation0.19 in

Chance of precipitation53%

Record high55° (2019)

Record low24° (1972)

Mon, 0743° / 35°

0.19

43 °

SeaTac, Monday, 7 December

Climate normal for this date — 60-year average.

Average high43°

Average low35°

Average precipitation0.19 in

Chance of precipitation55%

Record high55° (2025)

Record low17° (1972)

Tue, 0844° / 35°

0.23

44 °

SeaTac, Tuesday, 8 December

Climate normal for this date — 60-year average.

Average high44°

Average low35°

Average precipitation0.23 in

Chance of precipitation53%

Record high56° (2025)

Record low14° (1972)

Wed, 0944° / 35°

0.26

44 °

SeaTac, Wednesday, 9 December

Climate normal for this date — 60-year average.

Average high44°

Average low35°

Average precipitation0.26 in

Chance of precipitation65%

Record high55° (2025)

Record low22° (1972)

Thu, 1044° / 36°

0.31

44 °

SeaTac, Thursday, 10 December

Climate normal for this date — 60-year average.

Average high44°

Average low36°

Average precipitation0.31 in

Chance of precipitation73%

Record high57° (2025)

Record low16° (1972)

Fri, 1144° / 36°

0.28

44 °

SeaTac, Friday, 11 December

Climate normal for this date — 60-year average.

Average high44°

Average low36°

Average precipitation0.28 in

Chance of precipitation65%

Record high57° (2025)

Record low22° (1961)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for SeaTac, WA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in SeaTac, WA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.