Monthly outlook for Richland, WA: average high 89.8°, average low 65°. That is 0.5° below 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 (99.4°), the coolest 18 August (57.9°).
89.8°/65°
Average high / low
−0.5°
Below 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
92.4°
92.1°
+0.2°
19 August – 28 August
85.5°
88.2°
-1.5°
29 August – 7 September
at normal
85.8°
—
August records over 66 years
113.9°4 August 1961All-time high
47.1°28 August 1960All-time low
Climate normals and records are computed from the nearest reference point — Kennewick (8 mi).
Mon, 1096° / 62°0
96 °
Richland, Monday, 10 August
Clear. High 96°, low 62°.
Pressure29.88 inHg
Wind6.6 mph SW
Humidity21%
Visibility6.2 mi
Dew point43°
Tue, 1196° / 65°0
96 °
Richland, Tuesday, 11 August
Clear. High 96°, low 65°.
Pressure29.94 inHg
Wind2.6 mph SW
Humidity20%
Visibility6.2 mi
Dew point42°
Wed, 1296° / 67°0
96 °
Richland, Wednesday, 12 August
Clear. High 96°, low 67°.
Pressure29.83 inHg
Wind2.6 mph W
Humidity22%
Visibility6.2 mi
Dew point44°
Thu, 1396° / 68°0
96 °
Richland, Thursday, 13 August
Clear. High 96°, low 68°.
Pressure29.74 inHg
Wind9.7 mph N
Humidity19%
Visibility—
Dew point42°
Fri, 1497° / 69°0
97 °
Richland, Friday, 14 August
Clear. High 97°, low 69°.
Pressure29.80 inHg
Wind9.8 mph NW
Humidity16%
Visibility—
Dew point39°
Sat, 1599° / 68°0
99 °
Richland, Saturday, 15 August
Partly cloudy. High 99°, low 68°.
Pressure29.83 inHg
Wind10.6 mph SW
Humidity13%
Visibility—
Dew point36°
Sun, 1692° / 69°0
92 °
Richland, Sunday, 16 August
Overcast. High 92°, low 69°.
Pressure29.83 inHg
Wind21.6 mph W
Humidity15%
Visibility—
Dew point36°
Mon, 1774° / 62°0.07
74 °
Richland, Monday, 17 August
Light rain. High 74°, low 62°.
Pressure30.00 inHg
Wind16.3 mph W
Humidity54%
Visibility—
Dew point54°
Tue, 1886° / 58°0
86 °
Richland, Tuesday, 18 August
Partly cloudy. High 86°, low 58°.
Pressure29.88 inHg
Wind12.1 mph SW
Humidity28%
Visibility—
Dew point46°
Wed, 1990° / 64°0
90 °
Richland, Wednesday, 19 August
Partly cloudy. High 90°, low 64°.
Pressure29.88 inHg
Wind8.7 mph SW
Humidity24%
Visibility—
Dew point45°
Thu, 2092° / 71°0.02
92 °
Richland, Thursday, 20 August
Light rain. High 92°, low 71°.
Pressure29.80 inHg
Wind10.3 mph N
Humidity26%
Visibility—
Dew point49°
Fri, 2188° / 67°0.03
88 °
Richland, Friday, 21 August
Light rain. High 88°, low 67°.
Pressure29.77 inHg
Wind16.9 mph SW
Humidity17%
Visibility—
Dew point36°
Sat, 2280° / 63°0.02
80 °
Richland, Saturday, 22 August
Light rain. High 80°, low 63°.
Pressure29.88 inHg
Wind11.3 mph SW
Humidity31%
Visibility—
Dew point45°
Sun, 2386° / 59°0
86 °
Richland, Sunday, 23 August
Partly cloudy. High 86°, low 59°.
Pressure30.03 inHg
Wind10.5 mph SW
Humidity36%
Visibility—
Dew point45°
Mon, 2477° / 62°0
77 °
Richland, Monday, 24 August
Overcast. High 77°, low 62°.
Pressure29.80 inHg
Wind12.3 mph N
Humidity34%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2587° / 62°0.02
87 °
Richland, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high87°
Average low62°
Average precipitation0.02 in
Chance of precipitation7%
Record high105° (1996)
Record low51° (1960)
Wed, 2688° / 62°0.01
88 °
Richland, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low62°
Average precipitation0.01 in
Chance of precipitation3%
Record high104° (1996)
Record low52° (1976)
Thu, 2788° / 63°0
88 °
Richland, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high88°
Average low63°
Average precipitation0 in
Chance of precipitation3%
Record high103° (1986)
Record low51° (1960)
Fri, 2888° / 62°0.01
88 °
Richland, Friday, 28 August
Climate normal for this date — 60-year average.
Average high88°
Average low62°
Average precipitation0.01 in
Chance of precipitation2%
Record high103° (2023)
Record low47° (1960)
Sat, 2989° / 63°0
89 °
Richland, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high89°
Average low63°
Average precipitation0 in
Chance of precipitation3%
Record high102° (1967)
Record low50° (1965)
Sun, 3086° / 62°0.02
86 °
Richland, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high86°
Average low62°
Average precipitation0.02 in
Chance of precipitation8%
Record high102° (1967)
Record low50° (1966)
Mon, 3185° / 61°0.01
85 °
Richland, Monday, 31 August
Climate normal for this date — 60-year average.
Average high85°
Average low61°
Average precipitation0.01 in
Chance of precipitation5%
Record high104° (2022)
Record low47° (1964)
Tue, 0186° / 60°0.01
86 °
Richland, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high86°
Average low60°
Average precipitation0.01 in
Chance of precipitation5%
Record high102° (1987)
Record low49° (2021)
Wed, 0285° / 60°0
85 °
Richland, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high85°
Average low60°
Average precipitation0 in
Chance of precipitation3%
Record high104° (2022)
Record low49° (1975)
Thu, 0386° / 61°0.01
86 °
Richland, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high86°
Average low61°
Average precipitation0.01 in
Chance of precipitation5%
Record high101° (2017)
Record low48° (2000)
Fri, 0486° / 60°0
86 °
Richland, Friday, 4 September
Climate normal for this date — 60-year average.
Average high86°
Average low60°
Average precipitation0 in
Chance of precipitation3%
Record high103° (2017)
Record low50° (1969)
Sat, 0586° / 60°0
86 °
Richland, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high86°
Average low60°
Average precipitation0 in
Chance of precipitation2%
Record high100° (2017)
Record low51° (2000)
Sun, 0684° / 60°0.02
84 °
Richland, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high84°
Average low60°
Average precipitation0.02 in
Chance of precipitation10%
Record high100° (2024)
Record low49° (1996)
Mon, 0784° / 60°0.01
84 °
Richland, Monday, 7 September
Climate normal for this date — 60-year average.
Average high84°
Average low60°
Average precipitation0.01 in
Chance of precipitation5%
Record high100° (2024)
Record low48° (1971)
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 Richland, 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 Richland, 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.