Monthly outlook for Forest Grove, MN: average high 75.5°, average low 54.8°. That is 1.1° above the climate normal for August. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 6 days and 2.0 inches. The warmest day looks like 17 August (85.2°), the coolest 13 August (48.7°).
75.5°/54.8°
Average high / low
+1.1°
Above normal
3 / 6
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
77.1°
74°
+1.7°
18 August – 27 August
72.8°
73.1°
-0.2°
28 August – 6 September
at normal
71.1°
—
August records over 66 years
94.8°7 August 1983All-time high
40.3°28 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Mizpah (4 mi).
Sun, 0976° / 58°0.05
76 °
Forest Grove, Sunday, 9 August
Light rain. High 76°, low 58°.
Pressure29.88 inHg
Wind4.7 mph N
Humidity46%
Visibility6.2 mi
Dew point51°
Mon, 1078° / 57°0
78 °
Forest Grove, Monday, 10 August
Overcast. High 78°, low 57°.
Pressure29.97 inHg
Wind7.6 mph NW
Humidity54%
Visibility6.2 mi
Dew point52°
Tue, 1178° / 58°0
78 °
Forest Grove, Tuesday, 11 August
Clear. High 78°, low 58°.
Pressure29.88 inHg
Wind7.7 mph N
Humidity36%
Visibility6.2 mi
Dew point47°
Wed, 1272° / 56°0
72 °
Forest Grove, Wednesday, 12 August
Clear. High 72°, low 56°.
Pressure30.00 inHg
Wind11.3 mph NW
Humidity38%
Visibility6.2 mi
Dew point43°
Thu, 1374° / 49°0
74 °
Forest Grove, Thursday, 13 August
Clear. High 74°, low 49°.
Pressure30.03 inHg
Wind8.1 mph NW
Humidity37%
Visibility—
Dew point41°
Fri, 1480° / 51°0
80 °
Forest Grove, Friday, 14 August
Partly cloudy. High 80°, low 51°.
Pressure30.15 inHg
Wind4.9 mph E
Humidity34%
Visibility—
Dew point43°
Sat, 1576° / 60°0
76 °
Forest Grove, Saturday, 15 August
Overcast. High 76°, low 60°.
Pressure30.15 inHg
Wind9.3 mph S
Humidity53%
Visibility—
Dew point54°
Sun, 1674° / 57°0
74 °
Forest Grove, Sunday, 16 August
Overcast. High 74°, low 57°.
Pressure30.06 inHg
Wind7.1 mph NW
Humidity42%
Visibility—
Dew point47°
Mon, 1785° / 54°0.02
85 °
Forest Grove, Monday, 17 August
Light rain. High 85°, low 54°.
Pressure29.97 inHg
Wind8.9 mph SE
Humidity28%
Visibility—
Dew point42°
Tue, 1868° / 58°0.05
68 °
Forest Grove, Tuesday, 18 August
Light rain. High 68°, low 58°.
Pressure29.88 inHg
Wind11.9 mph NW
Humidity69%
Visibility—
Dew point54°
Wed, 1974° / 52°0
74 °
Forest Grove, Wednesday, 19 August
Clear. High 74°, low 52°.
Pressure30.09 inHg
Wind10.4 mph N
Humidity34%
Visibility—
Dew point39°
Thu, 2078° / 51°0
78 °
Forest Grove, Thursday, 20 August
Clear. High 78°, low 51°.
Pressure30.09 inHg
Wind5.9 mph E
Humidity32%
Visibility—
Dew point41°
Fri, 2179° / 52°0
79 °
Forest Grove, Friday, 21 August
Partly cloudy. High 79°, low 52°.
Pressure29.94 inHg
Wind12.5 mph S
Humidity36%
Visibility—
Dew point44°
Sat, 2267° / 58°0.19
67 °
Forest Grove, Saturday, 22 August
Rain. High 67°, low 58°.
Pressure29.56 inHg
Wind12.9 mph S
Humidity95%
Visibility—
Dew point57°
Sun, 2372° / 52°0
72 °
Forest Grove, Sunday, 23 August
Overcast. High 72°, low 52°.
Pressure29.94 inHg
Wind13.5 mph W
Humidity59%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2474° / 59°0.09
74 °
Forest Grove, Monday, 24 August
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.09 in
Chance of precipitation37%
Record high89° (1976)
Record low42° (1977)
Tue, 2574° / 59°0.08
74 °
Forest Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.08 in
Chance of precipitation28%
Record high89° (2013)
Record low46° (2025)
Wed, 2673° / 58°0.11
73 °
Forest Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.11 in
Chance of precipitation28%
Record high88° (2013)
Record low45° (1982)
Thu, 2773° / 57°0.08
73 °
Forest Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0.08 in
Chance of precipitation28%
Record high90° (1984)
Record low43° (1982)
Fri, 2873° / 57°0.1
73 °
Forest Grove, Friday, 28 August
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0.1 in
Chance of precipitation38%
Record high93° (1984)
Record low40° (1982)
Sat, 2972° / 58°0.12
72 °
Forest Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high72°
Average low58°
Average precipitation0.12 in
Chance of precipitation40%
Record high87° (2012)
Record low46° (1976)
Sun, 3072° / 57°0.09
72 °
Forest Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high72°
Average low57°
Average precipitation0.09 in
Chance of precipitation33%
Record high86° (1961)
Record low45° (2009)
Mon, 3172° / 57°0.15
72 °
Forest Grove, Monday, 31 August
Climate normal for this date — 60-year average.
Average high72°
Average low57°
Average precipitation0.15 in
Chance of precipitation40%
Record high84° (1990)
Record low46° (1970)
Tue, 0171° / 57°0.11
71 °
Forest Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low57°
Average precipitation0.11 in
Chance of precipitation38%
Record high85° (1983)
Record low42° (1974)
Wed, 0271° / 56°0.13
71 °
Forest Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.13 in
Chance of precipitation40%
Record high90° (1983)
Record low40° (1974)
Thu, 0371° / 56°0.09
71 °
Forest Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.09 in
Chance of precipitation32%
Record high89° (2023)
Record low40° (1974)
Fri, 0471° / 56°0.07
71 °
Forest Grove, Friday, 4 September
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.07 in
Chance of precipitation30%
Record high89° (2023)
Record low41° (2025)
Sat, 0570° / 56°0.11
70 °
Forest Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.11 in
Chance of precipitation40%
Record high89° (1978)
Record low42° (2025)
Sun, 0669° / 55°0.17
69 °
Forest Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high69°
Average low55°
Average precipitation0.17 in
Chance of precipitation43%
Record high87° (1978)
Record low40° (2025)
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 Forest Grove, MN 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 Forest Grove, MN 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.