Monthly outlook for Mountain View, WA: average high 66.7°, average low 55.6°. That is 2.6° below the climate normal for August. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 8 August (77.7°), the coolest 9 August (51.2°).
66.7°/55.6°
Average high / low
−2.6°
Below normal
1 / 3
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
67.5°
72°
-2.5°
18 August – 27 August
65.3°
70.2°
-2.7°
28 August – 6 September
at normal
68.6°
—
August records over 66 years
95.2°12 August 2021All-time high
44.2°28 August 1969All-time low
Climate normals and records are computed from the nearest reference point — Bellingham (11 mi).
Sun, 0976° / 51°0
76 °
Mountain View, Sunday, 9 August
Overcast. High 76°, low 51°.
Pressure30.06 inHg
Wind8.7 mph S
Humidity74%
Visibility6.2 mi
Dew point52°
Mon, 1064° / 51°0
64 °
Mountain View, Monday, 10 August
Clear. High 64°, low 51°.
Pressure30.09 inHg
Wind8.8 mph S
Humidity74%
Visibility6.2 mi
Dew point53°
Tue, 1163° / 54°0
63 °
Mountain View, Tuesday, 11 August
Clear. High 63°, low 54°.
Pressure30.12 inHg
Wind10.4 mph S
Humidity78%
Visibility6.2 mi
Dew point55°
Wed, 1262° / 56°0
62 °
Mountain View, Wednesday, 12 August
Overcast. High 62°, low 56°.
Pressure30.06 inHg
Wind13.2 mph S
Humidity83%
Visibility6.2 mi
Dew point55°
Thu, 1364° / 55°0
64 °
Mountain View, Thursday, 13 August
Overcast. High 64°, low 55°.
Pressure30.03 inHg
Wind9.3 mph SE
Humidity78%
Visibility—
Dew point54°
Fri, 1467° / 55°0
67 °
Mountain View, Friday, 14 August
Clear. High 67°, low 55°.
Pressure30.00 inHg
Wind6.5 mph W
Humidity72%
Visibility—
Dew point56°
Sat, 1568° / 56°0
68 °
Mountain View, Saturday, 15 August
Overcast. High 68°, low 56°.
Pressure30.00 inHg
Wind10.5 mph SE
Humidity70%
Visibility—
Dew point54°
Sun, 1666° / 56°0
66 °
Mountain View, Sunday, 16 August
Clear. High 66°, low 56°.
Pressure30.06 inHg
Wind12.4 mph SE
Humidity68%
Visibility—
Dew point54°
Mon, 1768° / 57°0
68 °
Mountain View, Monday, 17 August
Overcast. High 68°, low 57°.
Pressure30.03 inHg
Wind10.1 mph S
Humidity61%
Visibility—
Dew point52°
Tue, 1867° / 56°0
67 °
Mountain View, Tuesday, 18 August
Overcast. High 67°, low 56°.
Pressure30.09 inHg
Wind10 mph S
Humidity62%
Visibility—
Dew point53°
Wed, 1960° / 59°0.13
60 °
Mountain View, Wednesday, 19 August
Light rain. High 60°, low 59°.
Pressure30.09 inHg
Wind4.3 mph NW
Humidity96%
Visibility—
Dew point58°
Thu, 2066° / 58°0
66 °
Mountain View, Thursday, 20 August
Overcast. High 66°, low 58°.
Pressure30.03 inHg
Wind5.7 mph SE
Humidity77%
Visibility—
Dew point57°
Fri, 2167° / 58°0
67 °
Mountain View, Friday, 21 August
Partly cloudy. High 67°, low 58°.
Pressure30.06 inHg
Wind9.5 mph SE
Humidity70%
Visibility—
Dew point56°
Sat, 2266° / 56°0
66 °
Mountain View, Saturday, 22 August
Overcast. High 66°, low 56°.
Pressure30.03 inHg
Wind6.5 mph S
Humidity76%
Visibility—
Dew point57°
Sun, 2366° / 56°0
66 °
Mountain View, Sunday, 23 August
Overcast. High 66°, low 56°.
Pressure29.94 inHg
Wind5.9 mph W
Humidity77%
Visibility—
Dew point57°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2470° / 56°0.08
70 °
Mountain View, Monday, 24 August
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.08 in
Chance of precipitation25%
Record high84° (1996)
Record low51° (1995)
Tue, 2570° / 56°0.07
70 °
Mountain View, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.07 in
Chance of precipitation22%
Record high90° (1996)
Record low48° (1995)
Wed, 2671° / 56°0.07
71 °
Mountain View, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.07 in
Chance of precipitation25%
Record high87° (1986)
Record low49° (1977)
Thu, 2770° / 56°0.13
70 °
Mountain View, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.13 in
Chance of precipitation28%
Record high90° (1986)
Record low48° (1965)
Fri, 2870° / 56°0.07
70 °
Mountain View, Friday, 28 August
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.07 in
Chance of precipitation22%
Record high88° (1967)
Record low44° (1969)
Sat, 2970° / 56°0.1
70 °
Mountain View, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.1 in
Chance of precipitation30%
Record high87° (1996)
Record low47° (1965)
Sun, 3068° / 56°0.12
68 °
Mountain View, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high68°
Average low56°
Average precipitation0.12 in
Chance of precipitation27%
Record high83° (2022)
Record low47° (1965)
Mon, 3168° / 56°0.1
68 °
Mountain View, Monday, 31 August
Climate normal for this date — 60-year average.
Average high68°
Average low56°
Average precipitation0.1 in
Chance of precipitation27%
Record high89° (1987)
Record low48° (1964)
Tue, 0168° / 55°0.12
68 °
Mountain View, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high68°
Average low55°
Average precipitation0.12 in
Chance of precipitation27%
Record high84° (1987)
Record low45° (1973)
Wed, 0269° / 55°0.07
69 °
Mountain View, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high69°
Average low55°
Average precipitation0.07 in
Chance of precipitation25%
Record high88° (1988)
Record low46° (1960)
Thu, 0369° / 55°0.08
69 °
Mountain View, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high69°
Average low55°
Average precipitation0.08 in
Chance of precipitation25%
Record high88° (1988)
Record low46° (1975)
Fri, 0468° / 55°0.08
68 °
Mountain View, Friday, 4 September
Climate normal for this date — 60-year average.
Average high68°
Average low55°
Average precipitation0.08 in
Chance of precipitation28%
Record high87° (2017)
Record low44° (1970)
Sat, 0568° / 55°0.11
68 °
Mountain View, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high68°
Average low55°
Average precipitation0.11 in
Chance of precipitation25%
Record high94° (2017)
Record low47° (1969)
Sun, 0668° / 55°0.09
68 °
Mountain View, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high68°
Average low55°
Average precipitation0.09 in
Chance of precipitation33%
Record high83° (1987)
Record low46° (1992)
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 Mountain View, 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 Mountain View, 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.