As of 14:39 PDT

Weather in Union Mill, WA

82°

Union Mill, Saturday, 8 August, 14:39

Overcast. Feels like 85°. High 82°, low 57°.

Pressure30.03 inHg

Wind2 mph W

Humidity60%

Visibility6.2 mi

Dew point67°

See detailed hourly forecast

Monthly outlook for Union Mill, WA: average high 83°, average low 53.8°. That is 2.8° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 23 August (90.5°), the coolest 10 August (49.4°).

83°/53.8°

Average high / low

+2.8°

Above normal

0 / 2

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	82.6°	78.9°	+2.1°
18 August – 27 August	83.6°	76.3°	+4.1°
28 August – 6 September	at normal	74.5°	—

August records over 66 years

101.7°9 August 1981All-time high

46.2°28 August 2024All-time low

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

Sun, 0978° / 52°

78 °

Union Mill, Sunday, 9 August

Mostly clear. High 78°, low 52°.

Pressure30.06 inHg

Wind4.7 mph SW

Humidity43%

Visibility6.2 mi

Dew point51°

Mon, 1084° / 49°

84 °

Union Mill, Monday, 10 August

Clear. High 84°, low 49°.

Pressure30.09 inHg

Wind3.1 mph W

Humidity45%

Visibility6.2 mi

Dew point52°

Tue, 1183° / 50°

83 °

Union Mill, Tuesday, 11 August

Clear. High 83°, low 50°.

Pressure30.09 inHg

Wind3.2 mph W

Humidity42%

Visibility6.2 mi

Dew point52°

Wed, 1278° / 54°

0.01

78 °

Union Mill, Wednesday, 12 August

Light rain. High 78°, low 54°.

Pressure30.06 inHg

Wind4.3 mph SW

Humidity78%

Visibility6.2 mi

Dew point57°

Thu, 1378° / 55°

78 °

Union Mill, Thursday, 13 August

Overcast. High 78°, low 55°.

Pressure30.00 inHg

Wind3.9 mph W

Humidity47%

Visibility—

Dew point51°

Fri, 1484° / 51°

84 °

Union Mill, Friday, 14 August

Overcast. High 84°, low 51°.

Pressure29.94 inHg

Wind6.8 mph N

Humidity33%

Visibility—

Dew point47°

Sat, 1585° / 54°

85 °

Union Mill, Saturday, 15 August

Overcast. High 85°, low 54°.

Pressure30.00 inHg

Wind4.9 mph W

Humidity42%

Visibility—

Dew point51°

Sun, 1685° / 53°

85 °

Union Mill, Sunday, 16 August

Partly cloudy. High 85°, low 53°.

Pressure30.03 inHg

Wind7 mph W

Humidity28%

Visibility—

Dew point45°

Mon, 1789° / 53°

89 °

Union Mill, Monday, 17 August

Partly cloudy. High 89°, low 53°.

Pressure30.00 inHg

Wind6 mph W

Humidity23%

Visibility—

Dew point42°

Tue, 1884° / 52°

84 °

Union Mill, Tuesday, 18 August

Overcast. High 84°, low 52°.

Pressure30.06 inHg

Wind8.8 mph W

Humidity29%

Visibility—

Dew point46°

Wed, 1975° / 56°

75 °

Union Mill, Wednesday, 19 August

Overcast. High 75°, low 56°.

Pressure30.06 inHg

Wind3.8 mph N

Humidity45%

Visibility—

Dew point50°

Thu, 2084° / 58°

84 °

Union Mill, Thursday, 20 August

Overcast. High 84°, low 58°.

Pressure30.00 inHg

Wind7.8 mph W

Humidity38%

Visibility—

Dew point53°

Fri, 2184° / 55°

84 °

Union Mill, Friday, 21 August

Mostly clear. High 84°, low 55°.

Pressure30.03 inHg

Wind9.7 mph W

Humidity38%

Visibility—

Dew point53°

Sat, 2284° / 57°

84 °

Union Mill, Saturday, 22 August

Overcast. High 84°, low 57°.

Pressure30.00 inHg

Wind7.9 mph NE

Humidity41%

Visibility—

Dew point53°

Sun, 2390° / 54°

90 °

Union Mill, Sunday, 23 August

Clear. High 90°, low 54°.

Pressure29.91 inHg

Wind5.5 mph N

Humidity27%

Visibility—

Dew point46°

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

Mon, 2476° / 56°

0.06

76 °

Union Mill, Monday, 24 August

Climate normal for this date — 60-year average.

Average high76°

Average low56°

Average precipitation0.06 in

Chance of precipitation18%

Record high92° (1982)

Record low51° (1973)

Tue, 2576° / 56°

0.05

76 °

Union Mill, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high76°

Average low56°

Average precipitation0.05 in

Chance of precipitation15%

Record high94° (1996)

Record low50° (1993)

Wed, 2677° / 56°

0.03

77 °

Union Mill, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high77°

Average low56°

Average precipitation0.03 in

Chance of precipitation15%

Record high94° (1986)

Record low51° (1976)

Thu, 2776° / 57°

0.07

76 °

Union Mill, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high76°

Average low57°

Average precipitation0.07 in

Chance of precipitation18%

Record high96° (1986)

Record low50° (1960)

Fri, 2876° / 56°

0.06

76 °

Union Mill, Friday, 28 August

Climate normal for this date — 60-year average.

Average high76°

Average low56°

Average precipitation0.06 in

Chance of precipitation18%

Record high95° (1967)

Record low46° (2024)

Sat, 2975° / 57°

0.08

75 °

Union Mill, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high75°

Average low57°

Average precipitation0.08 in

Chance of precipitation23%

Record high91° (1996)

Record low48° (1965)

Sun, 3074° / 56°

0.07

74 °

Union Mill, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high74°

Average low56°

Average precipitation0.07 in

Chance of precipitation23%

Record high90° (2022)

Record low49° (1977)

Mon, 3174° / 56°

0.04

74 °

Union Mill, Monday, 31 August

Climate normal for this date — 60-year average.

Average high74°

Average low56°

Average precipitation0.04 in

Chance of precipitation18%

Record high94° (1987)

Record low49° (1964)

Tue, 0174° / 56°

0.1

74 °

Union Mill, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high74°

Average low56°

Average precipitation0.1 in

Chance of precipitation25%

Record high90° (1987)

Record low47° (2021)

Wed, 0275° / 56°

0.05

75 °

Union Mill, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high75°

Average low56°

Average precipitation0.05 in

Chance of precipitation23%

Record high96° (1988)

Record low46° (2000)

Thu, 0375° / 56°

0.05

75 °

Union Mill, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high75°

Average low56°

Average precipitation0.05 in

Chance of precipitation18%

Record high94° (1988)

Record low49° (1964)

Fri, 0474° / 55°

0.04

74 °

Union Mill, Friday, 4 September

Climate normal for this date — 60-year average.

Average high74°

Average low55°

Average precipitation0.04 in

Chance of precipitation17%

Record high91° (2017)

Record low49° (2015)

Sat, 0574° / 55°

0.06

74 °

Union Mill, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high74°

Average low55°

Average precipitation0.06 in

Chance of precipitation22%

Record high99° (2017)

Record low47° (2015)

Sun, 0673° / 55°

0.07

73 °

Union Mill, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high73°

Average low55°

Average precipitation0.07 in

Chance of precipitation25%

Record high93° (2024)

Record low47° (1960)

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 Union Mill, 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 Union Mill, 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.