As of 03:17 PDT

Weather in Plymouth, WA

70°

Plymouth, Sunday, 9 August, 03:17

Clear. Feels like 69°. High 92°, low 66°.

Pressure29.94 inHg

Wind6.4 mph W

Humidity50%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Monthly outlook for Plymouth, WA: average high 89.5°, average low 64.3°. That is 0.4° above the climate normal for August. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 1 days and 0.1 inches. The warmest day looks like 15 August (98.2°), the coolest 18 August (58.7°).

89.5°/64.3°

Average high / low

+0.4°

Above normal

1 / 1

Wet days / normal

0.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	91.7°	90°	+0.9°
19 August – 28 August	85.9°	86.4°	-0.3°
29 August – 7 September	at normal	84.2°	—

August records over 66 years

108.9°8 August 1972All-time high

45.7°28 August 1960All-time low

Climate normals and records are computed from the nearest reference point — Echo (15 mi).

Mon, 1095° / 60°

95 °

Plymouth, Monday, 10 August

Clear. High 95°, low 60°.

Pressure29.88 inHg

Wind12.1 mph SW

Humidity22%

Visibility6.2 mi

Dew point41°

Tue, 1196° / 61°

96 °

Plymouth, Tuesday, 11 August

Clear. High 96°, low 61°.

Pressure29.94 inHg

Wind10.8 mph SW

Humidity24%

Visibility6.2 mi

Dew point45°

Wed, 1295° / 65°

95 °

Plymouth, Wednesday, 12 August

Clear. High 95°, low 65°.

Pressure29.83 inHg

Wind8.2 mph SW

Humidity29%

Visibility6.2 mi

Dew point49°

Thu, 1395° / 65°

95 °

Plymouth, Thursday, 13 August

Clear. High 95°, low 65°.

Pressure29.74 inHg

Wind6.3 mph SW

Humidity21%

Visibility—

Dew point44°

Fri, 1498° / 67°

98 °

Plymouth, Friday, 14 August

Clear. High 98°, low 67°.

Pressure29.80 inHg

Wind6.9 mph W

Humidity16%

Visibility—

Dew point39°

Sat, 1598° / 68°

98 °

Plymouth, Saturday, 15 August

Overcast. High 98°, low 68°.

Pressure29.83 inHg

Wind12.3 mph SW

Humidity16%

Visibility—

Dew point40°

Sun, 1689° / 69°

89 °

Plymouth, Sunday, 16 August

Overcast. High 89°, low 69°.

Pressure29.85 inHg

Wind20.6 mph W

Humidity17%

Visibility—

Dew point37°

Mon, 1774° / 63°

0.08

74 °

Plymouth, Monday, 17 August

Light rain. High 74°, low 63°.

Pressure30.00 inHg

Wind11 mph W

Humidity54%

Visibility—

Dew point55°

Tue, 1885° / 59°

85 °

Plymouth, Tuesday, 18 August

Overcast. High 85°, low 59°.

Pressure29.91 inHg

Wind14.2 mph W

Humidity28%

Visibility—

Dew point44°

Wed, 1988° / 63°

88 °

Plymouth, Wednesday, 19 August

Partly cloudy. High 88°, low 63°.

Pressure29.88 inHg

Wind9.2 mph W

Humidity28%

Visibility—

Dew point48°

Thu, 2093° / 69°

0.01

93 °

Plymouth, Thursday, 20 August

Light rain. High 93°, low 69°.

Pressure29.80 inHg

Wind8.7 mph SW

Humidity26%

Visibility—

Dew point49°

Fri, 2186° / 68°

0.02

86 °

Plymouth, Friday, 21 August

Light rain. High 86°, low 68°.

Pressure29.83 inHg

Wind18.5 mph SW

Humidity22%

Visibility—

Dew point40°

Sat, 2282° / 66°

82 °

Plymouth, Saturday, 22 August

Overcast. High 82°, low 66°.

Pressure29.88 inHg

Wind19 mph SW

Humidity30%

Visibility—

Dew point46°

Sun, 2385° / 59°

85 °

Plymouth, Sunday, 23 August

Partly cloudy. High 85°, low 59°.

Pressure29.94 inHg

Wind13.8 mph SW

Humidity26%

Visibility—

Dew point42°

Mon, 2481° / 61°

81 °

Plymouth, Monday, 24 August

Overcast. High 81°, low 61°.

Pressure29.80 inHg

Wind17.3 mph SW

Humidity29%

Visibility—

Dew point42°

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

Tue, 2585° / 62°

0.02

85 °

Plymouth, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high85°

Average low62°

Average precipitation0.02 in

Chance of precipitation8%

Record high103° (1996)

Record low51° (1993)

Wed, 2686° / 62°

86 °

Plymouth, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high86°

Average low62°

Average precipitation0 in

Chance of precipitation5%

Record high100° (1996)

Record low49° (1993)

Thu, 2786° / 64°

86 °

Plymouth, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high86°

Average low64°

Average precipitation0 in

Chance of precipitation3%

Record high100° (1986)

Record low51° (1976)

Fri, 2887° / 63°

87 °

Plymouth, Friday, 28 August

Climate normal for this date — 60-year average.

Average high87°

Average low63°

Average precipitation0 in

Chance of precipitation2%

Record high101° (2023)

Record low46° (1960)

Sat, 2987° / 63°

87 °

Plymouth, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high87°

Average low63°

Average precipitation0 in

Chance of precipitation3%

Record high102° (2017)

Record low48° (1980)

Sun, 3084° / 62°

0.02

84 °

Plymouth, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high84°

Average low62°

Average precipitation0.02 in

Chance of precipitation10%

Record high100° (2022)

Record low46° (1965)

Mon, 3184° / 61°

84 °

Plymouth, Monday, 31 August

Climate normal for this date — 60-year average.

Average high84°

Average low61°

Average precipitation0 in

Chance of precipitation7%

Record high103° (2022)

Record low48° (1964)

Tue, 0185° / 61°

0.01

85 °

Plymouth, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high85°

Average low61°

Average precipitation0.01 in

Chance of precipitation7%

Record high102° (1987)

Record low47° (1999)

Wed, 0284° / 61°

0.01

84 °

Plymouth, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high84°

Average low61°

Average precipitation0.01 in

Chance of precipitation8%

Record high105° (2022)

Record low49° (1973)

Thu, 0384° / 61°

0.02

84 °

Plymouth, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high84°

Average low61°

Average precipitation0.02 in

Chance of precipitation7%

Record high102° (2017)

Record low48° (2000)

Fri, 0484° / 61°

84 °

Plymouth, Friday, 4 September

Climate normal for this date — 60-year average.

Average high84°

Average low61°

Average precipitation0 in

Chance of precipitation5%

Record high101° (2017)

Record low49° (2000)

Sat, 0584° / 61°

84 °

Plymouth, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high84°

Average low61°

Average precipitation0 in

Chance of precipitation3%

Record high99° (1988)

Record low49° (1969)

Sun, 0683° / 61°

0.01

83 °

Plymouth, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high83°

Average low61°

Average precipitation0.01 in

Chance of precipitation10%

Record high100° (2024)

Record low48° (1960)

Mon, 0783° / 60°

0.01

83 °

Plymouth, Monday, 7 September

Climate normal for this date — 60-year average.

Average high83°

Average low60°

Average precipitation0.01 in

Chance of precipitation8%

Record high98° (2024)

Record low44° (1992)

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 Plymouth, 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 Plymouth, 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.