Monthly outlook for Union Plains, MI: average high 79.2°, average low 58.2°. That is 0.4° above the climate normal for August. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 9 August (87.3°), the coolest 21 August (49.2°).
79.2°/58.2°
Average high / low
+0.4°
Above normal
3 / 5
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
80°
78.8°
+0.6°
19 August – 28 August
78°
78.2°
-0.1°
29 August – 7 September
at normal
76.7°
—
August records over 66 years
95.9°8 August 2001All-time high
44.6°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Durand (6 mi).
Mon, 1087° / 68°0.24
87 °
Union Plains, Monday, 10 August
Rain. High 87°, low 68°.
Pressure29.91 inHg
Wind8.1 mph W
Humidity81%
Visibility6.2 mi
Dew point70°
Tue, 1177° / 65°0.91
77 °
Union Plains, Tuesday, 11 August
Heavy rain. High 77°, low 65°.
Pressure29.83 inHg
Wind12.5 mph S
Humidity86%
Visibility6.2 mi
Dew point69°
Wed, 1280° / 61°0.04
80 °
Union Plains, Wednesday, 12 August
Light rain. High 80°, low 61°.
Pressure29.80 inHg
Wind5.6 mph NW
Humidity56%
Visibility6.2 mi
Dew point59°
Thu, 1371° / 53°0
71 °
Union Plains, Thursday, 13 August
Overcast. High 71°, low 53°.
Pressure30.03 inHg
Wind9.9 mph W
Humidity47%
Visibility—
Dew point46°
Fri, 1477° / 52°0
77 °
Union Plains, Friday, 14 August
Clear. High 77°, low 52°.
Pressure30.09 inHg
Wind9.2 mph NW
Humidity44%
Visibility—
Dew point50°
Sat, 1575° / 52°0
75 °
Union Plains, Saturday, 15 August
Overcast. High 75°, low 52°.
Pressure30.27 inHg
Wind7 mph NE
Humidity40%
Visibility—
Dew point46°
Sun, 1679° / 56°0
79 °
Union Plains, Sunday, 16 August
Partly cloudy. High 79°, low 56°.
Pressure30.12 inHg
Wind6.1 mph S
Humidity40%
Visibility—
Dew point50°
Mon, 1781° / 62°0
81 °
Union Plains, Monday, 17 August
Mostly clear. High 81°, low 62°.
Pressure30.00 inHg
Wind7.9 mph W
Humidity45%
Visibility—
Dew point55°
Tue, 1885° / 62°0
85 °
Union Plains, Tuesday, 18 August
Light rain. High 85°, low 62°.
Pressure29.97 inHg
Wind12.3 mph SW
Humidity42%
Visibility—
Dew point57°
Wed, 1975° / 61°0.03
75 °
Union Plains, Wednesday, 19 August
Light rain. High 75°, low 61°.
Pressure29.80 inHg
Wind19.7 mph W
Humidity64%
Visibility—
Dew point57°
Thu, 2076° / 57°0
76 °
Union Plains, Thursday, 20 August
Overcast. High 76°, low 57°.
Pressure29.91 inHg
Wind17 mph NW
Humidity43%
Visibility—
Dew point49°
Fri, 2177° / 49°0
77 °
Union Plains, Friday, 21 August
Partly cloudy. High 77°, low 49°.
Pressure30.06 inHg
Wind8.8 mph NE
Humidity30%
Visibility—
Dew point38°
Sat, 2276° / 53°0.01
76 °
Union Plains, Saturday, 22 August
Light rain. High 76°, low 53°.
Pressure29.97 inHg
Wind9.1 mph SE
Humidity33%
Visibility—
Dew point43°
Sun, 2384° / 61°0.01
84 °
Union Plains, Sunday, 23 August
Light rain. High 84°, low 61°.
Pressure29.77 inHg
Wind22.5 mph W
Humidity45%
Visibility—
Dew point58°
Mon, 2479° / 56°0
79 °
Union Plains, Monday, 24 August
Partly cloudy. High 79°, low 56°.
Pressure30.00 inHg
Wind10.3 mph NW
Humidity38%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 62°0.05
79 °
Union Plains, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.05 in
Chance of precipitation20%
Record high92° (2021)
Record low48° (1977)
Wed, 2679° / 63°0.15
79 °
Union Plains, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.15 in
Chance of precipitation33%
Record high91° (2024)
Record low48° (2025)
Thu, 2779° / 63°0.12
79 °
Union Plains, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.12 in
Chance of precipitation40%
Record high94° (1973)
Record low46° (2025)
Fri, 2878° / 63°0.15
78 °
Union Plains, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.15 in
Chance of precipitation40%
Record high92° (1973)
Record low45° (1986)
Sat, 2978° / 62°0.09
78 °
Union Plains, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.09 in
Chance of precipitation37%
Record high91° (2010)
Record low45° (1982)
Sun, 3078° / 61°0.06
78 °
Union Plains, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.06 in
Chance of precipitation23%
Record high90° (2010)
Record low46° (2025)
Mon, 3177° / 60°0.09
77 °
Union Plains, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.09 in
Chance of precipitation20%
Record high90° (2010)
Record low47° (2023)
Tue, 0177° / 60°0.09
77 °
Union Plains, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.09 in
Chance of precipitation27%
Record high89° (1973)
Record low47° (1967)
Wed, 0277° / 60°0.07
77 °
Union Plains, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.07 in
Chance of precipitation30%
Record high93° (2011)
Record low47° (1994)
Thu, 0377° / 60°0.07
77 °
Union Plains, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.07 in
Chance of precipitation28%
Record high91° (1973)
Record low46° (1974)
Fri, 0476° / 60°0.06
76 °
Union Plains, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.06 in
Chance of precipitation25%
Record high89° (1973)
Record low46° (1974)
Sat, 0576° / 59°0.06
76 °
Union Plains, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.06 in
Chance of precipitation23%
Record high90° (2023)
Record low46° (1984)
Sun, 0676° / 59°0.06
76 °
Union Plains, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.06 in
Chance of precipitation28%
Record high88° (1998)
Record low45° (1984)
Mon, 0776° / 59°0.12
76 °
Union Plains, Monday, 7 September
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.12 in
Chance of precipitation40%
Record high90° (1960)
Record low44° (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 Union Plains, 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 Union Plains, 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.