Monthly outlook for Cowiche, WA: average high 91°, average low 59.5°. That is 2.7° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 1 days and 0.1 inches. The warmest day looks like 16 August (97.7°), the coolest 10 August (54.5°).
91°/59.5°
Average high / low
+2.7°
Above normal
0 / 1
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
91.2°
87.5°
+2.1°
18 August – 27 August
90.6°
83.6°
+3.9°
28 August – 6 September
at normal
81.6°
—
August records over 66 years
108.9°15 August 2023All-time high
41.7°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Yakima (10 mi).
Sun, 0980° / 58°0
80 °
Cowiche, Sunday, 9 August
Mostly clear. High 80°, low 58°.
Pressure29.85 inHg
Wind9 mph SE
Humidity15%
Visibility6.2 mi
Dew point34°
Mon, 1091° / 54°0
91 °
Cowiche, Monday, 10 August
Clear. High 91°, low 54°.
Pressure29.88 inHg
Wind5.4 mph SE
Humidity18%
Visibility6.2 mi
Dew point37°
Tue, 1192° / 58°0
92 °
Cowiche, Tuesday, 11 August
Clear. High 92°, low 58°.
Pressure29.91 inHg
Wind9.3 mph SE
Humidity18%
Visibility6.2 mi
Dew point37°
Wed, 1290° / 61°0
90 °
Cowiche, Wednesday, 12 August
Clear. High 90°, low 61°.
Pressure29.83 inHg
Wind1.4 mph SW
Humidity19%
Visibility6.2 mi
Dew point39°
Thu, 1389° / 57°0
89 °
Cowiche, Thursday, 13 August
Clear. High 89°, low 57°.
Pressure29.80 inHg
Wind13.2 mph SE
Humidity21%
Visibility—
Dew point39°
Fri, 1489° / 62°0
89 °
Cowiche, Friday, 14 August
Clear. High 89°, low 62°.
Pressure29.94 inHg
Wind8.6 mph NW
Humidity19%
Visibility—
Dew point38°
Sat, 1594° / 64°0
94 °
Cowiche, Saturday, 15 August
Overcast. High 94°, low 64°.
Pressure29.91 inHg
Wind16.3 mph SE
Humidity13%
Visibility—
Dew point33°
Sun, 1698° / 64°0
98 °
Cowiche, Sunday, 16 August
Clear. High 98°, low 64°.
Pressure29.85 inHg
Wind19 mph W
Humidity10%
Visibility—
Dew point29°
Mon, 1797° / 64°0
97 °
Cowiche, Monday, 17 August
Overcast. High 97°, low 64°.
Pressure29.85 inHg
Wind13 mph SE
Humidity12%
Visibility—
Dew point33°
Tue, 1893° / 64°0
93 °
Cowiche, Tuesday, 18 August
Overcast. High 93°, low 64°.
Pressure29.88 inHg
Wind10.4 mph SE
Humidity14%
Visibility—
Dew point33°
Wed, 1989° / 60°0
89 °
Cowiche, Wednesday, 19 August
Overcast. High 89°, low 60°.
Pressure29.88 inHg
Wind11.1 mph SE
Humidity20%
Visibility—
Dew point39°
Thu, 2088° / 58°0
88 °
Cowiche, Thursday, 20 August
Clear. High 88°, low 58°.
Pressure29.83 inHg
Wind13.6 mph NW
Humidity18%
Visibility—
Dew point37°
Fri, 2190° / 55°0
90 °
Cowiche, Friday, 21 August
Clear. High 90°, low 55°.
Pressure29.85 inHg
Wind12.7 mph SE
Humidity17%
Visibility—
Dew point34°
Sat, 2293° / 61°0
93 °
Cowiche, Saturday, 22 August
Overcast. High 93°, low 61°.
Pressure29.80 inHg
Wind12.4 mph SE
Humidity13%
Visibility—
Dew point31°
Sun, 2391° / 58°0
91 °
Cowiche, Sunday, 23 August
Partly cloudy. High 91°, low 58°.
Pressure29.80 inHg
Wind11.2 mph NW
Humidity11%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 57°0.02
82 °
Cowiche, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low57°
Average precipitation0.02 in
Chance of precipitation7%
Record high100° (2025)
Record low44° (1975)
Tue, 2582° / 56°0.02
82 °
Cowiche, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low56°
Average precipitation0.02 in
Chance of precipitation7%
Record high101° (2025)
Record low45° (1960)
Wed, 2683° / 56°0
83 °
Cowiche, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low56°
Average precipitation0 in
Chance of precipitation2%
Record high98° (1996)
Record low45° (1976)
Thu, 2783° / 57°0
83 °
Cowiche, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0 in
Chance of precipitation2%
Record high98° (2023)
Record low44° (1960)
Fri, 2883° / 56°0
83 °
Cowiche, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low56°
Average precipitation0 in
Chance of precipitation3%
Record high100° (2023)
Record low44° (1960)
Sat, 2983° / 57°0.01
83 °
Cowiche, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0.01 in
Chance of precipitation5%
Record high101° (2017)
Record low42° (1965)
Sun, 3081° / 56°0.02
81 °
Cowiche, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low56°
Average precipitation0.02 in
Chance of precipitation7%
Record high97° (2022)
Record low42° (1965)
Mon, 3181° / 55°0
81 °
Cowiche, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0 in
Chance of precipitation2%
Record high101° (2022)
Record low43° (1975)
Tue, 0181° / 55°0.01
81 °
Cowiche, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0.01 in
Chance of precipitation7%
Record high99° (2022)
Record low43° (1975)
Wed, 0281° / 54°0
81 °
Cowiche, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low54°
Average precipitation0 in
Chance of precipitation3%
Record high100° (2022)
Record low44° (1975)
Thu, 0382° / 55°0.01
82 °
Cowiche, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low55°
Average precipitation0.01 in
Chance of precipitation8%
Record high103° (2025)
Record low43° (2000)
Fri, 0482° / 54°0
82 °
Cowiche, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low54°
Average precipitation0 in
Chance of precipitation2%
Record high100° (2025)
Record low45° (1996)
Sat, 0581° / 54°0
81 °
Cowiche, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low54°
Average precipitation0 in
Chance of precipitation5%
Record high99° (2025)
Record low43° (1969)
Sun, 0680° / 54°0.01
80 °
Cowiche, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low54°
Average precipitation0.01 in
Chance of precipitation10%
Record high100° (2020)
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 Cowiche, 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 Cowiche, 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.