Monthly outlook for Durham, WA: average high 78.4°, average low 53.8°. That is 1.5° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 23 August (84.9°), the coolest 10 August (49°).
78.4°/53.8°
Average high / low
+1.5°
Above 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
77.4°
76.6°
+0.5°
18 August – 27 August
80.1°
74.1°
+3.3°
28 August – 6 September
at normal
72.3°
—
August records over 66 years
97.9°9 August 1981All-time high
44.2°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Kent (15 mi).
Sun, 0975° / 49°0
75 °
Durham, Sunday, 9 August
Clear. High 75°, low 49°.
Pressure30.03 inHg
Wind4.6 mph NW
Humidity40%
Visibility6.2 mi
Dew point47°
Mon, 1079° / 49°0
79 °
Durham, Monday, 10 August
Clear. High 79°, low 49°.
Pressure30.06 inHg
Wind5 mph NW
Humidity46%
Visibility6.2 mi
Dew point50°
Tue, 1180° / 51°0
80 °
Durham, Tuesday, 11 August
Clear. High 80°, low 51°.
Pressure30.09 inHg
Wind5.1 mph NW
Humidity44%
Visibility6.2 mi
Dew point50°
Wed, 1267° / 55°0.01
67 °
Durham, Wednesday, 12 August
Light rain. High 67°, low 55°.
Pressure30.06 inHg
Wind4 mph SW
Humidity79%
Visibility—
Dew point56°
Thu, 1373° / 54°0.01
73 °
Durham, Thursday, 13 August
Light rain. High 73°, low 54°.
Pressure30.00 inHg
Wind5.9 mph NW
Humidity49%
Visibility—
Dew point49°
Fri, 1480° / 50°0
80 °
Durham, Friday, 14 August
Overcast. High 80°, low 50°.
Pressure29.97 inHg
Wind6.5 mph NW
Humidity38%
Visibility—
Dew point48°
Sat, 1575° / 55°0
75 °
Durham, Saturday, 15 August
Overcast. High 75°, low 55°.
Pressure30.00 inHg
Wind3.6 mph W
Humidity45%
Visibility—
Dew point51°
Sun, 1681° / 54°0
81 °
Durham, Sunday, 16 August
Overcast. High 81°, low 54°.
Pressure30.03 inHg
Wind4.7 mph W
Humidity30%
Visibility—
Dew point43°
Mon, 1784° / 56°0
84 °
Durham, Monday, 17 August
Partly cloudy. High 84°, low 56°.
Pressure30.00 inHg
Wind5 mph W
Humidity28%
Visibility—
Dew point44°
Tue, 1881° / 55°0
81 °
Durham, Tuesday, 18 August
Overcast. High 81°, low 55°.
Pressure30.06 inHg
Wind4.5 mph SE
Humidity30%
Visibility—
Dew point44°
Wed, 1973° / 57°0.01
73 °
Durham, Wednesday, 19 August
Light rain. High 73°, low 57°.
Pressure30.06 inHg
Wind3.8 mph NW
Humidity45%
Visibility—
Dew point49°
Thu, 2080° / 55°0
80 °
Durham, Thursday, 20 August
Overcast. High 80°, low 55°.
Pressure30.00 inHg
Wind5.3 mph W
Humidity43%
Visibility—
Dew point52°
Fri, 2181° / 55°0
81 °
Durham, Friday, 21 August
Clear. High 81°, low 55°.
Pressure30.03 inHg
Wind5 mph W
Humidity37%
Visibility—
Dew point49°
Sat, 2281° / 54°0
81 °
Durham, Saturday, 22 August
Overcast. High 81°, low 54°.
Pressure30.00 inHg
Wind6 mph NW
Humidity42%
Visibility—
Dew point52°
Sun, 2385° / 56°0
85 °
Durham, Sunday, 23 August
Clear. High 85°, low 56°.
Pressure29.91 inHg
Wind5.3 mph NW
Humidity38%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2473° / 55°0.07
73 °
Durham, Monday, 24 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.07 in
Chance of precipitation20%
Record high87° (1985)
Record low47° (2021)
Tue, 2574° / 55°0.07
74 °
Durham, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high74°
Average low55°
Average precipitation0.07 in
Chance of precipitation18%
Record high88° (2022)
Record low46° (1995)
Wed, 2675° / 55°0.05
75 °
Durham, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high75°
Average low55°
Average precipitation0.05 in
Chance of precipitation22%
Record high89° (1986)
Record low47° (1993)
Thu, 2774° / 56°0.08
74 °
Durham, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0.08 in
Chance of precipitation28%
Record high91° (1986)
Record low48° (1962)
Fri, 2874° / 55°0.04
74 °
Durham, Friday, 28 August
Climate normal for this date — 60-year average.
Average high74°
Average low55°
Average precipitation0.04 in
Chance of precipitation18%
Record high92° (1967)
Record low46° (1960)
Sat, 2973° / 55°0.11
73 °
Durham, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.11 in
Chance of precipitation25%
Record high87° (1996)
Record low46° (1980)
Sun, 3072° / 55°0.08
72 °
Durham, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.08 in
Chance of precipitation33%
Record high87° (2022)
Record low44° (1965)
Mon, 3171° / 55°0.07
71 °
Durham, Monday, 31 August
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.07 in
Chance of precipitation32%
Record high92° (1987)
Record low46° (2008)
Tue, 0172° / 54°0.08
72 °
Durham, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.08 in
Chance of precipitation27%
Record high88° (1987)
Record low43° (1973)
Wed, 0273° / 54°0.08
73 °
Durham, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low54°
Average precipitation0.08 in
Chance of precipitation30%
Record high94° (1988)
Record low44° (1960)
Thu, 0372° / 54°0.08
72 °
Durham, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.08 in
Chance of precipitation27%
Record high92° (1988)
Record low43° (1975)
Fri, 0472° / 54°0.06
72 °
Durham, Friday, 4 September
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.06 in
Chance of precipitation22%
Record high88° (2017)
Record low45° (1965)
Sat, 0572° / 54°0.08
72 °
Durham, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.08 in
Chance of precipitation33%
Record high93° (2017)
Record low45° (2000)
Sun, 0671° / 54°0.1
71 °
Durham, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.1 in
Chance of precipitation27%
Record high88° (2017)
Record low44° (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 Durham, 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 Durham, 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.