Monthly outlook for St. Joseph, MI: average high 74.2°, average low 64.6°. That is 2.1° below the climate normal for August. Precipitation is expected on 3 days (about 4.2 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 9 August (87.7°), the coolest 22 August (59.4°).
74.2°/64.6°
Average high / low
−2.1°
Below normal
3 / 6
Wet days / normal
4.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
75.8°
78.3°
-1.4°
18 August – 27 August
71.6°
78.1°
-3.6°
28 August – 6 September
at normal
76.9°
—
August records over 66 years
94.1°24 August 2023All-time high
50.9°29 August 2025All-time low
Climate normals and records are computed from the nearest reference point — Bridgman (12 mi).
Sun, 0988° / 64°2.08
88 °
St. Joseph, Sunday, 9 August
Heavy rain. High 88°, low 64°.
Pressure29.97 inHg
Wind15.7 mph S
Humidity63%
Visibility6.2 mi
Dew point63°
Mon, 1083° / 69°1.09
83 °
St. Joseph, Monday, 10 August
Heavy rain. High 83°, low 69°.
Pressure29.94 inHg
Wind2.5 mph W
Humidity82%
Visibility6.2 mi
Dew point67°
Tue, 1176° / 65°0.91
76 °
St. Joseph, Tuesday, 11 August
Heavy rain. High 76°, low 65°.
Pressure29.80 inHg
Wind11.5 mph E
Humidity93%
Visibility6.2 mi
Dew point63°
Wed, 1273° / 67°0
73 °
St. Joseph, Wednesday, 12 August
Overcast. High 73°, low 67°.
Pressure29.85 inHg
Wind6.4 mph NW
Humidity83%
Visibility6.2 mi
Dew point66°
Thu, 1368° / 61°0
68 °
St. Joseph, Thursday, 13 August
Overcast. High 68°, low 61°.
Pressure30.03 inHg
Wind12.7 mph NE
Humidity56%
Visibility—
Dew point51°
Fri, 1471° / 62°0
71 °
St. Joseph, Friday, 14 August
Clear. High 71°, low 62°.
Pressure30.12 inHg
Wind7.6 mph NW
Humidity63%
Visibility—
Dew point55°
Sat, 1573° / 62°0
73 °
St. Joseph, Saturday, 15 August
Overcast. High 73°, low 62°.
Pressure30.30 inHg
Wind9.4 mph E
Humidity52%
Visibility—
Dew point53°
Sun, 1671° / 62°0
71 °
St. Joseph, Sunday, 16 August
Overcast. High 71°, low 62°.
Pressure30.15 inHg
Wind7.2 mph SE
Humidity71%
Visibility—
Dew point60°
Mon, 1772° / 67°0.02
72 °
St. Joseph, Monday, 17 August
Light rain. High 72°, low 67°.
Pressure30.06 inHg
Wind7.7 mph W
Humidity79%
Visibility—
Dew point64°
Tue, 1878° / 67°0
78 °
St. Joseph, Tuesday, 18 August
Overcast. High 78°, low 67°.
Pressure30.00 inHg
Wind12.9 mph SW
Humidity78%
Visibility—
Dew point66°
Wed, 1972° / 67°0.03
72 °
St. Joseph, Wednesday, 19 August
Light rain. High 72°, low 67°.
Pressure29.88 inHg
Wind25.1 mph N
Humidity73%
Visibility—
Dew point61°
Thu, 2068° / 66°0.02
68 °
St. Joseph, Thursday, 20 August
Light rain. High 68°, low 66°.
Pressure30.03 inHg
Wind25.9 mph N
Humidity64%
Visibility—
Dew point55°
Fri, 2168° / 60°0
68 °
St. Joseph, Friday, 21 August
Clear. High 68°, low 60°.
Pressure30.09 inHg
Wind13 mph N
Humidity56%
Visibility—
Dew point50°
Sat, 2269° / 59°0.01
69 °
St. Joseph, Saturday, 22 August
Light rain. High 69°, low 59°.
Pressure29.94 inHg
Wind19.5 mph SE
Humidity66%
Visibility—
Dew point55°
Sun, 2374° / 69°0
74 °
St. Joseph, Sunday, 23 August
Mostly clear. High 74°, low 69°.
Pressure29.88 inHg
Wind21.4 mph W
Humidity72%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2478° / 67°0.11
78 °
St. Joseph, Monday, 24 August
Climate normal for this date — 60-year average.
Average high78°
Average low67°
Average precipitation0.11 in
Chance of precipitation33%
Record high94° (2023)
Record low57° (1967)
Tue, 2578° / 67°0.11
78 °
St. Joseph, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low67°
Average precipitation0.11 in
Chance of precipitation30%
Record high89° (2024)
Record low54° (2017)
Wed, 2679° / 67°0.14
79 °
St. Joseph, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low67°
Average precipitation0.14 in
Chance of precipitation35%
Record high94° (2024)
Record low55° (2017)
Thu, 2779° / 68°0.14
79 °
St. Joseph, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low68°
Average precipitation0.14 in
Chance of precipitation35%
Record high92° (2024)
Record low55° (2025)
Fri, 2878° / 67°0.16
78 °
St. Joseph, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low67°
Average precipitation0.16 in
Chance of precipitation42%
Record high90° (2021)
Record low52° (1986)
Sat, 2978° / 67°0.11
78 °
St. Joseph, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low67°
Average precipitation0.11 in
Chance of precipitation33%
Record high90° (2022)
Record low51° (2025)
Sun, 3077° / 66°0.07
77 °
St. Joseph, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low66°
Average precipitation0.07 in
Chance of precipitation28%
Record high89° (1995)
Record low55° (2025)
Mon, 3177° / 65°0.09
77 °
St. Joseph, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.09 in
Chance of precipitation23%
Record high87° (1969)
Record low53° (2025)
Tue, 0177° / 65°0.15
77 °
St. Joseph, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.15 in
Chance of precipitation28%
Record high89° (2011)
Record low53° (2017)
Wed, 0277° / 65°0.07
77 °
St. Joseph, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.07 in
Chance of precipitation27%
Record high88° (2008)
Record low51° (2017)
Thu, 0377° / 65°0.07
77 °
St. Joseph, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.07 in
Chance of precipitation27%
Record high88° (2023)
Record low53° (1974)
Fri, 0476° / 65°0.1
76 °
St. Joseph, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.1 in
Chance of precipitation30%
Record high88° (1999)
Record low54° (1997)
Sat, 0576° / 65°0.08
76 °
St. Joseph, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.08 in
Chance of precipitation30%
Record high89° (2023)
Record low54° (2019)
Sun, 0676° / 64°0.1
76 °
St. Joseph, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.1 in
Chance of precipitation37%
Record high89° (1990)
Record low52° (1962)
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 St. Joseph, MI 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 St. Joseph, MI 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.