As of 11:29 PST

Weather in SeaTac, WA

52°

SeaTac, Sunday, 15 November, 11:29

Overcast. Feels like 51°. High 53°, low 48°.

Pressure29.85 inHg

Wind9.2 mph SE

Humidity89%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Monthly outlook for SeaTac, WA: average high 50.6°, average low 42.9°. That is 2.3° above the climate normal for November. Precipitation is expected on 9 days (about 4.5 inches), against a normal of 10 days and 4.1 inches. The warmest day looks like 16 November (56.2°), the coolest 20 November (35.3°).

50.6°/42.9°

Average high / low

+2.3°

Above normal

9 / 10

Wet days / normal

4.5 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
15 November – 24 November	49.9°	47.3°	+1.5°
25 November – 4 December	51.8°	45.1°	+3.7°
5 December – 14 December	at normal	43.8°	—

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).

Mon, 1656° / 41°

0.36

56 °

SeaTac, Monday, 16 November

Rain. High 56°, low 41°.

Pressure30.09 inHg

Wind2.4 mph SW

Humidity75%

Visibility6.2 mi

Dew point42°

Tue, 1749° / 39°

49 °

SeaTac, Tuesday, 17 November

Overcast. High 49°, low 39°.

Pressure30.00 inHg

Wind1.3 mph SE

Humidity80%

Visibility6.2 mi

Dew point42°

Wed, 1850° / 41°

0.01

50 °

SeaTac, Wednesday, 18 November

Light rain. High 50°, low 41°.

Pressure29.91 inHg

Wind6.6 mph N

Humidity60%

Visibility6.2 mi

Dew point37°

Thu, 1948° / 39°

48 °

SeaTac, Thursday, 19 November

Clear. High 48°, low 39°.

Pressure30.15 inHg

Wind7.5 mph N

Humidity86%

Visibility—

Dew point39°

Fri, 2047° / 35°

47 °

SeaTac, Friday, 20 November

Clear. High 47°, low 35°.

Pressure29.97 inHg

Wind5.1 mph NE

Humidity82%

Visibility—

Dew point36°

Sat, 2147° / 41°

0.28

47 °

SeaTac, Saturday, 21 November

Light rain. High 47°, low 41°.

Pressure29.91 inHg

Wind7.8 mph SE

Humidity82%

Visibility—

Dew point38°

Sun, 2250° / 40°

0.17

50 °

SeaTac, Sunday, 22 November

Rain. High 50°, low 40°.

Pressure29.85 inHg

Wind5.9 mph SE

Humidity74%

Visibility—

Dew point36°

Mon, 2347° / 42°

1.47

47 °

SeaTac, Monday, 23 November

Rain. High 47°, low 42°.

Pressure29.50 inHg

Wind6.1 mph S

Humidity93%

Visibility—

Dew point41°

Tue, 2452° / 47°

1.12

52 °

SeaTac, Tuesday, 24 November

Rain. High 52°, low 47°.

Pressure29.50 inHg

Wind8.4 mph SE

Humidity90%

Visibility—

Dew point48°

Wed, 2551° / 44°

0.56

51 °

SeaTac, Wednesday, 25 November

Rain. High 51°, low 44°.

Pressure30.15 inHg

Wind9.9 mph S

Humidity72%

Visibility—

Dew point39°

Thu, 2653° / 47°

0.27

53 °

SeaTac, Thursday, 26 November

Rain. High 53°, low 47°.

Pressure30.15 inHg

Wind12.5 mph S

Humidity78%

Visibility—

Dew point43°

Fri, 2753° / 45°

0.01

53 °

SeaTac, Friday, 27 November

Light rain. High 53°, low 45°.

Pressure29.74 inHg

Wind3.1 mph NE

Humidity76%

Visibility—

Dew point41°

Sat, 2853° / 47°

0.09

53 °

SeaTac, Saturday, 28 November

Light rain. High 53°, low 47°.

Pressure29.88 inHg

Wind12.2 mph SW

Humidity84%

Visibility—

Dew point44°

Sun, 2949° / 46°

0.02

49 °

SeaTac, Sunday, 29 November

Light rain. High 49°, low 46°.

Pressure30.30 inHg

Wind8.6 mph S

Humidity81%

Visibility—

Dew point41°

Mon, 3052° / 44°

52 °

SeaTac, Monday, 30 November

Overcast. High 52°, low 44°.

Pressure30.36 inHg

Wind4.5 mph N

Humidity80%

Visibility—

Dew point41°

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

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)

Sat, 1244° / 35°

0.26

44 °

SeaTac, Saturday, 12 December

Climate normal for this date — 60-year average.

Average high44°

Average low35°

Average precipitation0.26 in

Chance of precipitation63%

Record high55° (2025)

Record low18° (1972)

Sun, 1344° / 35°

0.27

44 °

SeaTac, Sunday, 13 December

Climate normal for this date — 60-year average.

Average high44°

Average low35°

Average precipitation0.27 in

Chance of precipitation68%

Record high55° (2025)

Record low13° (1972)

Mon, 1444° / 36°

0.3

44 °

SeaTac, Monday, 14 December

Climate normal for this date — 60-year average.

Average high44°

Average low36°

Average precipitation0.3 in

Chance of precipitation75%

Record high55° (2025)

Record low25° (1967)

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.