Monthly outlook for Big Lake Chapel, MN: average high 76.9°, average low 57.2°. That is 1.1° above the climate normal for August. Precipitation is expected on 5 days (about 2.3 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 22 August (84.5°), the coolest 16 August (54.1°).
76.9°/57.2°
Average high / low
+1.1°
Above normal
5 / 5
Wet days / normal
2.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
75°
75.5°
-0.3°
19 August – 28 August
80.2°
74.4°
+3.2°
29 August – 7 September
at normal
72.6°
—
August records over 66 years
94.1°5 August 2001All-time high
43.3°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Wrenshall (12 mi).
Mon, 1081° / 60°0
81 °
Big Lake Chapel, Monday, 10 August
Light rain. High 81°, low 60°.
Pressure29.91 inHg
Wind2.6 mph N
Humidity33%
Visibility6.2 mi
Dew point50°
Tue, 1183° / 59°0.21
83 °
Big Lake Chapel, Tuesday, 11 August
Rain. High 83°, low 59°.
Pressure29.83 inHg
Wind6.5 mph N
Humidity42%
Visibility6.2 mi
Dew point55°
Wed, 1276° / 54°0
76 °
Big Lake Chapel, Wednesday, 12 August
Light rain. High 76°, low 54°.
Pressure29.97 inHg
Wind7.2 mph N
Humidity62%
Visibility6.2 mi
Dew point51°
Thu, 1377° / 57°0.01
77 °
Big Lake Chapel, Thursday, 13 August
Light rain. High 77°, low 57°.
Pressure30.00 inHg
Wind5.2 mph E
Humidity57%
Visibility6.2 mi
Dew point55°
Fri, 1477° / 55°0
77 °
Big Lake Chapel, Friday, 14 August
Overcast. High 77°, low 55°.
Pressure30.09 inHg
Wind10 mph E
Humidity51%
Visibility—
Dew point53°
Sat, 1559° / 56°0.39
59 °
Big Lake Chapel, Saturday, 15 August
Rain. High 59°, low 56°.
Pressure30.00 inHg
Wind7.7 mph E
Humidity99%
Visibility—
Dew point58°
Sun, 1676° / 54°0
76 °
Big Lake Chapel, Sunday, 16 August
Overcast. High 76°, low 54°.
Pressure30.03 inHg
Wind5.7 mph NE
Humidity75%
Visibility—
Dew point56°
Mon, 1769° / 55°0.88
69 °
Big Lake Chapel, Monday, 17 August
Heavy rain. High 69°, low 55°.
Pressure29.94 inHg
Wind9 mph SE
Humidity69%
Visibility—
Dew point56°
Tue, 1875° / 61°0.04
75 °
Big Lake Chapel, Tuesday, 18 August
Light rain. High 75°, low 61°.
Pressure29.83 inHg
Wind10.9 mph W
Humidity62%
Visibility—
Dew point57°
Wed, 1980° / 57°0
80 °
Big Lake Chapel, Wednesday, 19 August
Mostly clear. High 80°, low 57°.
Pressure29.97 inHg
Wind7.7 mph SW
Humidity39%
Visibility—
Dew point50°
Thu, 2081° / 62°0.69
81 °
Big Lake Chapel, Thursday, 20 August
Heavy rain. High 81°, low 62°.
Pressure29.77 inHg
Wind14.1 mph N
Humidity54%
Visibility—
Dew point60°
Fri, 2180° / 56°0
80 °
Big Lake Chapel, Friday, 21 August
Mostly clear. High 80°, low 56°.
Pressure30.00 inHg
Wind5.7 mph E
Humidity37%
Visibility—
Dew point47°
Sat, 2284° / 56°0.04
84 °
Big Lake Chapel, Saturday, 22 August
Light rain. High 84°, low 56°.
Pressure29.85 inHg
Wind14 mph SW
Humidity56%
Visibility—
Dew point57°
Sun, 2380° / 58°0
80 °
Big Lake Chapel, Sunday, 23 August
Clear. High 80°, low 58°.
Pressure29.97 inHg
Wind9.5 mph NW
Humidity31%
Visibility—
Dew point43°
Mon, 2475° / 55°0
75 °
Big Lake Chapel, Monday, 24 August
Overcast. High 75°, low 55°.
Pressure30.06 inHg
Wind10.8 mph NW
Humidity34%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2575° / 60°0.11
75 °
Big Lake Chapel, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.11 in
Chance of precipitation33%
Record high92° (2013)
Record low48° (2025)
Wed, 2675° / 60°0.19
75 °
Big Lake Chapel, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.19 in
Chance of precipitation38%
Record high91° (1991)
Record low48° (1964)
Thu, 2774° / 59°0.13
74 °
Big Lake Chapel, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.13 in
Chance of precipitation35%
Record high89° (1973)
Record low46° (1982)
Fri, 2874° / 59°0.11
74 °
Big Lake Chapel, Friday, 28 August
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.11 in
Chance of precipitation28%
Record high90° (1984)
Record low43° (1986)
Sat, 2974° / 58°0.1
74 °
Big Lake Chapel, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.1 in
Chance of precipitation33%
Record high89° (1969)
Record low46° (1965)
Sun, 3073° / 58°0.1
73 °
Big Lake Chapel, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.1 in
Chance of precipitation38%
Record high88° (1961)
Record low46° (2009)
Mon, 3173° / 57°0.15
73 °
Big Lake Chapel, Monday, 31 August
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0.15 in
Chance of precipitation38%
Record high88° (1961)
Record low45° (1967)
Tue, 0173° / 58°0.12
73 °
Big Lake Chapel, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.12 in
Chance of precipitation33%
Record high88° (2011)
Record low42° (1974)
Wed, 0273° / 58°0.09
73 °
Big Lake Chapel, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.09 in
Chance of precipitation27%
Record high89° (1983)
Record low42° (1974)
Thu, 0373° / 58°0.09
73 °
Big Lake Chapel, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.09 in
Chance of precipitation28%
Record high94° (2023)
Record low40° (1974)
Fri, 0473° / 57°0.12
73 °
Big Lake Chapel, Friday, 4 September
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0.12 in
Chance of precipitation35%
Record high95° (2023)
Record low43° (2025)
Sat, 0572° / 57°0.12
72 °
Big Lake Chapel, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high72°
Average low57°
Average precipitation0.12 in
Chance of precipitation33%
Record high87° (2007)
Record low43° (1962)
Sun, 0672° / 56°0.11
72 °
Big Lake Chapel, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high72°
Average low56°
Average precipitation0.11 in
Chance of precipitation32%
Record high88° (1960)
Record low42° (2025)
Mon, 0771° / 56°0.1
71 °
Big Lake Chapel, Monday, 7 September
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.1 in
Chance of precipitation33%
Record high93° (1976)
Record low41° (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 Big Lake Chapel, 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 Big Lake Chapel, 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.