Monthly outlook for Hetherton, MI: average high 76.8°, average low 55.6°. That is 1.2° above the climate normal for August. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 August (93.9°), the coolest 14 August (44.8°).
76.8°/55.6°
Average high / low
+1.2°
Above normal
2 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
74.6°
75°
-0.3°
19 August – 28 August
80.5°
74.2°
+3.5°
29 August – 7 September
at normal
72.3°
—
August records over 66 years
95°2 August 1988All-time high
41.5°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Lewiston (10 mi).
Mon, 1081° / 60°0.01
81 °
Hetherton, Monday, 10 August
Light rain. High 81°, low 60°.
Pressure29.85 inHg
Wind11.7 mph NW
Humidity49%
Visibility6.2 mi
Dew point58°
Tue, 1179° / 58°0
79 °
Hetherton, Tuesday, 11 August
Overcast. High 79°, low 58°.
Pressure29.91 inHg
Wind3.7 mph SE
Humidity54%
Visibility6.2 mi
Dew point54°
Wed, 1275° / 57°0
75 °
Hetherton, Wednesday, 12 August
Partly cloudy. High 75°, low 57°.
Pressure29.77 inHg
Wind6.1 mph N
Humidity50%
Visibility6.2 mi
Dew point55°
Thu, 1365° / 49°0
65 °
Hetherton, Thursday, 13 August
Partly cloudy. High 65°, low 49°.
Pressure30.00 inHg
Wind9.8 mph NW
Humidity49%
Visibility—
Dew point42°
Fri, 1471° / 45°0
71 °
Hetherton, Friday, 14 August
Mostly clear. High 71°, low 45°.
Pressure30.15 inHg
Wind9.2 mph N
Humidity39%
Visibility—
Dew point40°
Sat, 1575° / 47°0
75 °
Hetherton, Saturday, 15 August
Overcast. High 75°, low 47°.
Pressure30.27 inHg
Wind4.3 mph S
Humidity32%
Visibility—
Dew point40°
Sun, 1663° / 54°0.05
63 °
Hetherton, Sunday, 16 August
Light rain. High 63°, low 54°.
Pressure30.12 inHg
Wind6.8 mph SW
Humidity96%
Visibility—
Dew point58°
Mon, 1776° / 57°0.01
76 °
Hetherton, Monday, 17 August
Light rain. High 76°, low 57°.
Pressure30.03 inHg
Wind9.2 mph NW
Humidity41%
Visibility—
Dew point48°
Tue, 1881° / 52°0
81 °
Hetherton, Tuesday, 18 August
Partly cloudy. High 81°, low 52°.
Pressure30.03 inHg
Wind6.8 mph S
Humidity34%
Visibility—
Dew point45°
Wed, 1988° / 59°0
88 °
Hetherton, Wednesday, 19 August
Overcast. High 88°, low 59°.
Pressure29.91 inHg
Wind9.5 mph SW
Humidity43%
Visibility—
Dew point57°
Thu, 2094° / 67°0.02
94 °
Hetherton, Thursday, 20 August
Light rain. High 94°, low 67°.
Pressure29.74 inHg
Wind11.3 mph W
Humidity39%
Visibility—
Dew point62°
Fri, 2181° / 58°0
81 °
Hetherton, Friday, 21 August
Overcast. High 81°, low 58°.
Pressure29.91 inHg
Wind9.8 mph NW
Humidity45%
Visibility—
Dew point54°
Sat, 2278° / 57°0.01
78 °
Hetherton, Saturday, 22 August
Light rain. High 78°, low 57°.
Pressure30.00 inHg
Wind9.9 mph NE
Humidity45%
Visibility—
Dew point46°
Sun, 2369° / 58°0.37
69 °
Hetherton, Sunday, 23 August
Rain. High 69°, low 58°.
Pressure29.94 inHg
Wind11 mph E
Humidity70%
Visibility—
Dew point58°
Mon, 2472° / 56°0
72 °
Hetherton, Monday, 24 August
Overcast. High 72°, low 56°.
Pressure30.15 inHg
Wind10.4 mph E
Humidity49%
Visibility—
Dew point50°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2575° / 58°0.1
75 °
Hetherton, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.1 in
Chance of precipitation28%
Record high90° (2013)
Record low44° (1977)
Wed, 2675° / 59°0.16
75 °
Hetherton, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.16 in
Chance of precipitation37%
Record high89° (2024)
Record low48° (1966)
Thu, 2774° / 59°0.2
74 °
Hetherton, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.2 in
Chance of precipitation48%
Record high90° (1973)
Record low46° (2025)
Fri, 2874° / 58°0.09
74 °
Hetherton, Friday, 28 August
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.09 in
Chance of precipitation38%
Record high89° (1991)
Record low43° (1986)
Sat, 2973° / 57°0.13
73 °
Hetherton, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0.13 in
Chance of precipitation43%
Record high90° (1984)
Record low42° (1982)
Sun, 3073° / 57°0.09
73 °
Hetherton, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0.09 in
Chance of precipitation33%
Record high87° (2012)
Record low43° (1976)
Mon, 3173° / 56°0.05
73 °
Hetherton, Monday, 31 August
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.05 in
Chance of precipitation18%
Record high86° (1960)
Record low44° (2009)
Tue, 0173° / 56°0.06
73 °
Hetherton, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.06 in
Chance of precipitation25%
Record high85° (2015)
Record low46° (1994)
Wed, 0273° / 56°0.08
73 °
Hetherton, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.08 in
Chance of precipitation30%
Record high90° (2011)
Record low42° (1976)
Thu, 0373° / 56°0.12
73 °
Hetherton, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.12 in
Chance of precipitation32%
Record high86° (2012)
Record low42° (1987)
Fri, 0472° / 55°0.09
72 °
Hetherton, Friday, 4 September
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.09 in
Chance of precipitation30%
Record high90° (2023)
Record low43° (2025)
Sat, 0572° / 56°0.09
72 °
Hetherton, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high72°
Average low56°
Average precipitation0.09 in
Chance of precipitation35%
Record high89° (2023)
Record low44° (1984)
Sun, 0672° / 56°0.07
72 °
Hetherton, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high72°
Average low56°
Average precipitation0.07 in
Chance of precipitation35%
Record high88° (1960)
Record low43° (1962)
Mon, 0770° / 55°0.08
70 °
Hetherton, Monday, 7 September
Climate normal for this date — 60-year average.
Average high70°
Average low55°
Average precipitation0.08 in
Chance of precipitation43%
Record high90° (1960)
Record low40° (1986)
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 Hetherton, 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 Hetherton, 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.