As of 15:57 PDT

Weather in Irwin, WA

88°

Irwin, Saturday, 8 August, 15:57

Overcast. Feels like 85°. High 89°, low 58°.

Pressure29.85 inHg

Wind2 mph NW

Humidity25%

Visibility6.2 mi

Dew point48°

See detailed hourly forecast

Monthly outlook for Irwin, WA: average high 90°, average low 63.4°. That is 3.6° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 23 August (102.6°), the coolest 10 August (54.7°).

90°/63.4°

Average high / low

+3.6°

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	88.3°	84.7°	+2°
18 August – 27 August	92.8°	81.1°	+6.5°
28 August – 6 September	at normal	78.9°	—

August records over 66 years

106.5°4 August 1961All-time high

41.5°28 August 1960All-time low

Climate normals and records are computed from the nearest reference point — Spokane Valley (2 mi).

Sun, 0988° / 56°

88 °

Irwin, Sunday, 9 August

Clear. High 88°, low 56°.

Pressure29.85 inHg

Wind7.6 mph SW

Humidity16%

Visibility6.2 mi

Dew point33°

Mon, 1088° / 55°

88 °

Irwin, Monday, 10 August

Clear. High 88°, low 55°.

Pressure29.88 inHg

Wind7.7 mph SW

Humidity21%

Visibility6.2 mi

Dew point38°

Tue, 1190° / 63°

90 °

Irwin, Tuesday, 11 August

Clear. High 90°, low 63°.

Pressure29.94 inHg

Wind7.8 mph SW

Humidity19%

Visibility6.2 mi

Dew point38°

Wed, 1288° / 65°

88 °

Irwin, Wednesday, 12 August

Clear. High 88°, low 65°.

Pressure29.85 inHg

Wind7.4 mph SW

Humidity27%

Visibility6.2 mi

Dew point44°

Thu, 1384° / 63°

84 °

Irwin, Thursday, 13 August

Clear. High 84°, low 63°.

Pressure29.85 inHg

Wind8.4 mph S

Humidity33%

Visibility—

Dew point43°

Fri, 1489° / 61°

89 °

Irwin, Friday, 14 August

Clear. High 89°, low 61°.

Pressure29.94 inHg

Wind4.3 mph W

Humidity21%

Visibility—

Dew point35°

Sat, 1584° / 67°

84 °

Irwin, Saturday, 15 August

Overcast. High 84°, low 67°.

Pressure29.91 inHg

Wind14.9 mph SW

Humidity19%

Visibility—

Dew point33°

Sun, 1689° / 60°

0.01

89 °

Irwin, Sunday, 16 August

Light rain. High 89°, low 60°.

Pressure30.00 inHg

Wind9.5 mph W

Humidity26%

Visibility—

Dew point40°

Mon, 1794° / 64°

94 °

Irwin, Monday, 17 August

Clear. High 94°, low 64°.

Pressure30.00 inHg

Wind7.6 mph SW

Humidity19%

Visibility—

Dew point36°

Tue, 1884° / 67°

84 °

Irwin, Tuesday, 18 August

Overcast. High 84°, low 67°.

Pressure30.00 inHg

Wind14.7 mph S

Humidity23%

Visibility—

Dew point39°

Wed, 1992° / 60°

92 °

Irwin, Wednesday, 19 August

Overcast. High 92°, low 60°.

Pressure30.00 inHg

Wind5.8 mph NW

Humidity30%

Visibility—

Dew point44°

Thu, 2092° / 69°

0.01

92 °

Irwin, Thursday, 20 August

Light rain. High 92°, low 69°.

Pressure29.91 inHg

Wind8.6 mph SW

Humidity22%

Visibility—

Dew point40°

Fri, 2192° / 68°

92 °

Irwin, Friday, 21 August

Mostly clear. High 92°, low 68°.

Pressure29.97 inHg

Wind8 mph SW

Humidity27%

Visibility—

Dew point44°

Sat, 2295° / 69°

95 °

Irwin, Saturday, 22 August

Clear. High 95°, low 69°.

Pressure29.94 inHg

Wind4 mph SE

Humidity24%

Visibility—

Dew point44°

Sun, 23103° / 69°

103 °

Irwin, Sunday, 23 August

Overcast. High 103°, low 69°.

Pressure29.85 inHg

Wind6.2 mph W

Humidity17%

Visibility—

Dew point38°

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

Mon, 2479° / 56°

0.06

79 °

Irwin, Monday, 24 August

Climate normal for this date — 60-year average.

Average high79°

Average low56°

Average precipitation0.06 in

Chance of precipitation15%

Record high98° (1966)

Record low44° (1992)

Tue, 2580° / 56°

0.03

80 °

Irwin, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.03 in

Chance of precipitation12%

Record high96° (2025)

Record low43° (1992)

Wed, 2681° / 55°

0.02

81 °

Irwin, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high81°

Average low55°

Average precipitation0.02 in

Chance of precipitation12%

Record high97° (1996)

Record low47° (1976)

Thu, 2781° / 56°

0.02

81 °

Irwin, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high81°

Average low56°

Average precipitation0.02 in

Chance of precipitation15%

Record high95° (1986)

Record low43° (1960)

Fri, 2881° / 56°

0.02

81 °

Irwin, Friday, 28 August

Climate normal for this date — 60-year average.

Average high81°

Average low56°

Average precipitation0.02 in

Chance of precipitation10%

Record high98° (2009)

Record low42° (1960)

Sat, 2981° / 56°

0.02

81 °

Irwin, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high81°

Average low56°

Average precipitation0.02 in

Chance of precipitation15%

Record high96° (2017)

Record low42° (1965)

Sun, 3079° / 56°

0.04

79 °

Irwin, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high79°

Average low56°

Average precipitation0.04 in

Chance of precipitation12%

Record high95° (1967)

Record low45° (1965)

Mon, 3178° / 55°

0.02

78 °

Irwin, Monday, 31 August

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.02 in

Chance of precipitation18%

Record high101° (2022)

Record low42° (1964)

Tue, 0179° / 55°

0.02

79 °

Irwin, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high79°

Average low55°

Average precipitation0.02 in

Chance of precipitation10%

Record high99° (2025)

Record low45° (1975)

Wed, 0278° / 54°

0.02

78 °

Irwin, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high78°

Average low54°

Average precipitation0.02 in

Chance of precipitation10%

Record high100° (2025)

Record low45° (1999)

Thu, 0379° / 54°

0.02

79 °

Irwin, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high79°

Average low54°

Average precipitation0.02 in

Chance of precipitation10%

Record high101° (1988)

Record low42° (1980)

Fri, 0479° / 54°

0.01

79 °

Irwin, Friday, 4 September

Climate normal for this date — 60-year average.

Average high79°

Average low54°

Average precipitation0.01 in

Chance of precipitation8%

Record high99° (1988)

Record low44° (1965)

Sat, 0578° / 55°

0.02

78 °

Irwin, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.02 in

Chance of precipitation8%

Record high96° (1988)

Record low43° (1969)

Sun, 0677° / 54°

0.03

77 °

Irwin, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high77°

Average low54°

Average precipitation0.03 in

Chance of precipitation15%

Record high94° (2024)

Record low42° (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 Irwin, 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 Irwin, 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.