Monthly outlook for Grand Falls, MN: average high 74.7°, average low 55.9°. That is 0.3° above the climate normal for August. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 6 days and 2.0 inches. The warmest day looks like 19 August (93.7°), the coolest 13 August (48.2°).
74.7°/55.9°
Average high / low
+0.3°
Above normal
3 / 6
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
76.1°
74.6°
+0.8°
19 August – 28 August
72.5°
73.7°
-0.7°
29 August – 7 September
at normal
71.2°
—
August records over 66 years
95°7 August 1983All-time high
39.9°28 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Big Falls (2 mi).
Mon, 1080° / 57°0
80 °
Grand Falls, Monday, 10 August
Partly cloudy. High 80°, low 57°.
Pressure29.94 inHg
Wind3.6 mph W
Humidity43%
Visibility6.2 mi
Dew point50°
Tue, 1178° / 56°0
78 °
Grand Falls, Tuesday, 11 August
Clear. High 78°, low 56°.
Pressure29.88 inHg
Wind7.5 mph N
Humidity36%
Visibility6.2 mi
Dew point46°
Wed, 1273° / 54°0
73 °
Grand Falls, Wednesday, 12 August
Partly cloudy. High 73°, low 54°.
Pressure29.94 inHg
Wind10.8 mph N
Humidity41%
Visibility6.2 mi
Dew point46°
Thu, 1375° / 48°0
75 °
Grand Falls, Thursday, 13 August
Partly cloudy. High 75°, low 48°.
Pressure30.09 inHg
Wind5.9 mph N
Humidity38%
Visibility—
Dew point42°
Fri, 1479° / 50°0
79 °
Grand Falls, Friday, 14 August
Overcast. High 79°, low 50°.
Pressure30.18 inHg
Wind4.9 mph SE
Humidity28%
Visibility—
Dew point38°
Sat, 1568° / 60°0.02
68 °
Grand Falls, Saturday, 15 August
Light rain. High 68°, low 60°.
Pressure30.12 inHg
Wind9.8 mph SW
Humidity64%
Visibility—
Dew point54°
Sun, 1673° / 59°0
73 °
Grand Falls, Sunday, 16 August
Overcast. High 73°, low 59°.
Pressure30.12 inHg
Wind9.7 mph NW
Humidity68%
Visibility—
Dew point54°
Mon, 1781° / 55°0.02
81 °
Grand Falls, Monday, 17 August
Light rain. High 81°, low 55°.
Pressure30.09 inHg
Wind7.2 mph S
Humidity34%
Visibility—
Dew point44°
Tue, 1878° / 61°0.06
78 °
Grand Falls, Tuesday, 18 August
Light rain. High 78°, low 61°.
Pressure29.83 inHg
Wind10.5 mph S
Humidity91%
Visibility—
Dew point64°
Wed, 1994° / 66°0.11
94 °
Grand Falls, Wednesday, 19 August
Light rain. High 94°, low 66°.
Pressure29.77 inHg
Wind5.6 mph SE
Humidity44%
Visibility—
Dew point61°
Thu, 2071° / 58°0
71 °
Grand Falls, Thursday, 20 August
Overcast. High 71°, low 58°.
Pressure29.91 inHg
Wind11.7 mph NW
Humidity62%
Visibility—
Dew point55°
Fri, 2179° / 52°0
79 °
Grand Falls, Friday, 21 August
Partly cloudy. High 79°, low 52°.
Pressure30.00 inHg
Wind6.1 mph W
Humidity37%
Visibility—
Dew point45°
Sat, 2271° / 56°0.02
71 °
Grand Falls, Saturday, 22 August
Light rain. High 71°, low 56°.
Pressure29.91 inHg
Wind8.8 mph NE
Humidity65%
Visibility—
Dew point57°
Sun, 2366° / 54°0
66 °
Grand Falls, Sunday, 23 August
Overcast. High 66°, low 54°.
Pressure30.12 inHg
Wind9.2 mph NE
Humidity71%
Visibility—
Dew point49°
Mon, 2455° / 48°0.13
55 °
Grand Falls, Monday, 24 August
Light rain. High 55°, low 48°.
Pressure30.21 inHg
Wind7.9 mph E
Humidity97%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2575° / 58°0.08
75 °
Grand Falls, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.08 in
Chance of precipitation40%
Record high91° (2013)
Record low46° (2025)
Wed, 2674° / 57°0.11
74 °
Grand Falls, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high74°
Average low57°
Average precipitation0.11 in
Chance of precipitation28%
Record high89° (2013)
Record low43° (1982)
Thu, 2773° / 56°0.09
73 °
Grand Falls, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.09 in
Chance of precipitation32%
Record high92° (1991)
Record low40° (1982)
Fri, 2873° / 56°0.11
73 °
Grand Falls, Friday, 28 August
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.11 in
Chance of precipitation40%
Record high94° (1984)
Record low40° (1965)
Sat, 2973° / 56°0.13
73 °
Grand Falls, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.13 in
Chance of precipitation40%
Record high88° (2012)
Record low43° (1976)
Sun, 3072° / 55°0.07
72 °
Grand Falls, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.07 in
Chance of precipitation30%
Record high86° (1961)
Record low44° (2009)
Mon, 3172° / 56°0.17
72 °
Grand Falls, Monday, 31 August
Climate normal for this date — 60-year average.
Average high72°
Average low56°
Average precipitation0.17 in
Chance of precipitation42%
Record high85° (2008)
Record low43° (1970)
Tue, 0171° / 56°0.09
71 °
Grand Falls, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.09 in
Chance of precipitation33%
Record high86° (2023)
Record low39° (1974)
Wed, 0271° / 55°0.13
71 °
Grand Falls, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.13 in
Chance of precipitation43%
Record high91° (1983)
Record low38° (1974)
Thu, 0371° / 55°0.11
71 °
Grand Falls, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.11 in
Chance of precipitation37%
Record high89° (2023)
Record low38° (1974)
Fri, 0471° / 55°0.09
71 °
Grand Falls, Friday, 4 September
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.09 in
Chance of precipitation33%
Record high90° (2023)
Record low40° (2025)
Sat, 0570° / 55°0.1
70 °
Grand Falls, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high70°
Average low55°
Average precipitation0.1 in
Chance of precipitation45%
Record high89° (1978)
Record low39° (1962)
Sun, 0670° / 54°0.16
70 °
Grand Falls, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high70°
Average low54°
Average precipitation0.16 in
Chance of precipitation38%
Record high87° (1976)
Record low39° (2025)
Mon, 0769° / 53°0.13
69 °
Grand Falls, Monday, 7 September
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.13 in
Chance of precipitation35%
Record high92° (1976)
Record low39° (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 Grand Falls, 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 Grand Falls, 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.