As of 14:17 PDT

Weather in Cathan, WA

79°

Cathan, Saturday, 8 August, 14:17

Overcast. Feels like 78°. High 79°, low 57°.

Pressure30.09 inHg

Wind2 mph SE

Humidity45%

Visibility6.2 mi

Dew point56°

See detailed hourly forecast

Monthly outlook for Cathan, WA: average high 72.3°, average low 53.7°. That is 1° below the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 8 August (79.4°), the coolest 10 August (50.1°).

72.3°/53.7°

Average high / low

−1°

Below normal

0 / 3

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	72.7°	74.9°	-1.2°
18 August – 27 August	71.6°	72.9°	-0.7°
28 August – 6 September	at normal	70.9°	—

August records over 66 years

96.8°16 August 2020All-time high

44.2°18 August 1973All-time low

Climate normals and records are computed from the nearest reference point — Marysville (6 mi).

Sun, 0975° / 51°

75 °

Cathan, Sunday, 9 August

Overcast. High 75°, low 51°.

Pressure30.06 inHg

Wind3.5 mph NW

Humidity52%

Visibility6.2 mi

Dew point51°

Mon, 1071° / 50°

71 °

Cathan, Monday, 10 August

Mostly clear. High 71°, low 50°.

Pressure30.09 inHg

Wind3.4 mph W

Humidity55%

Visibility6.2 mi

Dew point52°

Tue, 1172° / 52°

72 °

Cathan, Tuesday, 11 August

Clear. High 72°, low 52°.

Pressure30.09 inHg

Wind4.9 mph NW

Humidity56%

Visibility6.2 mi

Dew point53°

Wed, 1264° / 56°

64 °

Cathan, Wednesday, 12 August

Light rain. High 64°, low 56°.

Pressure30.06 inHg

Wind2.9 mph W

Humidity80%

Visibility6.2 mi

Dew point57°

Thu, 1370° / 54°

0.01

70 °

Cathan, Thursday, 13 August

Light rain. High 70°, low 54°.

Pressure30.00 inHg

Wind6.5 mph NW

Humidity65%

Visibility—

Dew point53°

Fri, 1471° / 51°

71 °

Cathan, Friday, 14 August

Overcast. High 71°, low 51°.

Pressure30.00 inHg

Wind8.1 mph NW

Humidity57%

Visibility—

Dew point52°

Sat, 1575° / 54°

75 °

Cathan, Saturday, 15 August

Overcast. High 75°, low 54°.

Pressure29.97 inHg

Wind4.4 mph S

Humidity50%

Visibility—

Dew point52°

Sun, 1673° / 54°

73 °

Cathan, Sunday, 16 August

Clear. High 73°, low 54°.

Pressure30.06 inHg

Wind7.5 mph NW

Humidity49%

Visibility—

Dew point51°

Mon, 1776° / 54°

76 °

Cathan, Monday, 17 August

Overcast. High 76°, low 54°.

Pressure30.00 inHg

Wind8.3 mph NW

Humidity42%

Visibility—

Dew point49°

Tue, 1876° / 54°

76 °

Cathan, Tuesday, 18 August

Overcast. High 76°, low 54°.

Pressure30.06 inHg

Wind6.6 mph NW

Humidity43%

Visibility—

Dew point49°

Wed, 1964° / 55°

64 °

Cathan, Wednesday, 19 August

Overcast. High 64°, low 55°.

Pressure30.06 inHg

Wind5.5 mph NW

Humidity73%

Visibility—

Dew point55°

Thu, 2072° / 55°

72 °

Cathan, Thursday, 20 August

Overcast. High 72°, low 55°.

Pressure30.03 inHg

Wind7.1 mph NW

Humidity58%

Visibility—

Dew point54°

Fri, 2175° / 55°

75 °

Cathan, Friday, 21 August

Mostly clear. High 75°, low 55°.

Pressure30.03 inHg

Wind8.8 mph NW

Humidity48%

Visibility—

Dew point52°

Sat, 2270° / 54°

70 °

Cathan, Saturday, 22 August

Overcast. High 70°, low 54°.

Pressure30.03 inHg

Wind9.1 mph NW

Humidity63%

Visibility—

Dew point55°

Sun, 2372° / 53°

72 °

Cathan, Sunday, 23 August

Overcast. High 72°, low 53°.

Pressure29.94 inHg

Wind7.2 mph NW

Humidity55%

Visibility—

Dew point53°

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

Mon, 2472° / 55°

0.07

72 °

Cathan, Monday, 24 August

Climate normal for this date — 60-year average.

Average high72°

Average low55°

Average precipitation0.07 in

Chance of precipitation20%

Record high85° (1985)

Record low47° (1993)

Tue, 2573° / 55°

0.07

73 °

Cathan, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high73°

Average low55°

Average precipitation0.07 in

Chance of precipitation25%

Record high87° (1996)

Record low47° (1973)

Wed, 2673° / 55°

0.06

73 °

Cathan, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high73°

Average low55°

Average precipitation0.06 in

Chance of precipitation22%

Record high89° (1986)

Record low47° (1993)

Thu, 2773° / 56°

0.13

73 °

Cathan, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high73°

Average low56°

Average precipitation0.13 in

Chance of precipitation27%

Record high90° (1986)

Record low49° (1960)

Fri, 2873° / 55°

0.06

73 °

Cathan, Friday, 28 August

Climate normal for this date — 60-year average.

Average high73°

Average low55°

Average precipitation0.06 in

Chance of precipitation27%

Record high91° (1967)

Record low46° (2000)

Sat, 2972° / 55°

0.1

72 °

Cathan, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high72°

Average low55°

Average precipitation0.1 in

Chance of precipitation37%

Record high90° (2017)

Record low45° (1969)

Sun, 3071° / 55°

0.09

71 °

Cathan, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high71°

Average low55°

Average precipitation0.09 in

Chance of precipitation37%

Record high85° (1987)

Record low45° (1965)

Mon, 3170° / 55°

0.08

70 °

Cathan, Monday, 31 August

Climate normal for this date — 60-year average.

Average high70°

Average low55°

Average precipitation0.08 in

Chance of precipitation33%

Record high91° (1987)

Record low45° (1964)

Tue, 0171° / 54°

0.16

71 °

Cathan, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high71°

Average low54°

Average precipitation0.16 in

Chance of precipitation30%

Record high87° (1987)

Record low44° (1973)

Wed, 0271° / 54°

0.09

71 °

Cathan, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high71°

Average low54°

Average precipitation0.09 in

Chance of precipitation33%

Record high92° (1988)

Record low44° (1960)

Thu, 0371° / 54°

0.09

71 °

Cathan, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high71°

Average low54°

Average precipitation0.09 in

Chance of precipitation25%

Record high94° (1988)

Record low46° (1975)

Fri, 0471° / 54°

0.06

71 °

Cathan, Friday, 4 September

Climate normal for this date — 60-year average.

Average high71°

Average low54°

Average precipitation0.06 in

Chance of precipitation32%

Record high85° (1988)

Record low45° (1965)

Sat, 0570° / 54°

0.1

70 °

Cathan, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high70°

Average low54°

Average precipitation0.1 in

Chance of precipitation23%

Record high96° (2017)

Record low47° (2000)

Sun, 0670° / 53°

0.13

70 °

Cathan, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high70°

Average low53°

Average precipitation0.13 in

Chance of precipitation30%

Record high85° (1986)

Record low45° (1969)

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 Cathan, 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 Cathan, 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.