Monthly outlook for Hammond, IN: average high 78.2°, average low 66.4°. That is 1° below the climate normal for August. Precipitation is expected on 6 days (about 2.9 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 8 August (85.2°), the coolest 23 August (55.4°).
78.2°/66.4°
Average high / low
−1°
Below normal
6 / 6
Wet days / normal
2.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
79.4°
80.2°
-0.5°
18 August – 27 August
76.1°
80.1°
-2.2°
28 August – 6 September
at normal
78.6°
—
August records over 66 years
98.1°24 August 2023All-time high
49.3°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Calumet Park (9 mi).
Sun, 0983° / 66°1.91
83 °
Hammond, Sunday, 9 August
Heavy rain. High 83°, low 66°.
Pressure29.94 inHg
Wind7.4 mph SW
Humidity71%
Visibility6.2 mi
Dew point72°
Mon, 1083° / 73°0.13
83 °
Hammond, Monday, 10 August
Rain. High 83°, low 73°.
Pressure29.91 inHg
Wind4.3 mph SE
Humidity75%
Visibility6.2 mi
Dew point71°
Tue, 1184° / 73°0.24
84 °
Hammond, Tuesday, 11 August
Rain. High 84°, low 73°.
Pressure29.77 inHg
Wind15.3 mph SW
Humidity65%
Visibility6.2 mi
Dew point71°
Wed, 1281° / 70°0.02
81 °
Hammond, Wednesday, 12 August
Light rain. High 81°, low 70°.
Pressure29.85 inHg
Wind5.8 mph N
Humidity67%
Visibility6.2 mi
Dew point64°
Thu, 1371° / 67°0.02
71 °
Hammond, Thursday, 13 August
Light rain. High 71°, low 67°.
Pressure29.94 inHg
Wind12.8 mph NE
Humidity67%
Visibility—
Dew point59°
Fri, 1472° / 63°0
72 °
Hammond, Friday, 14 August
Clear. High 72°, low 63°.
Pressure30.18 inHg
Wind10.4 mph NE
Humidity51%
Visibility—
Dew point52°
Sat, 1577° / 60°0
77 °
Hammond, Saturday, 15 August
Overcast. High 77°, low 60°.
Pressure30.33 inHg
Wind7.1 mph SE
Humidity46%
Visibility—
Dew point50°
Sun, 1680° / 60°0
80 °
Hammond, Sunday, 16 August
Mostly clear. High 80°, low 60°.
Pressure30.21 inHg
Wind9.9 mph S
Humidity47%
Visibility—
Dew point54°
Mon, 1777° / 69°0.11
77 °
Hammond, Monday, 17 August
Light rain. High 77°, low 69°.
Pressure30.00 inHg
Wind6.9 mph S
Humidity88%
Visibility—
Dew point67°
Tue, 1880° / 69°0
80 °
Hammond, Tuesday, 18 August
Overcast. High 80°, low 69°.
Pressure30.03 inHg
Wind9.1 mph NE
Humidity63%
Visibility—
Dew point65°
Wed, 1985° / 67°0.43
85 °
Hammond, Wednesday, 19 August
Rain. High 85°, low 67°.
Pressure29.91 inHg
Wind7.5 mph S
Humidity56%
Visibility—
Dew point65°
Thu, 2077° / 69°0.07
77 °
Hammond, Thursday, 20 August
Light rain. High 77°, low 69°.
Pressure29.88 inHg
Wind9.9 mph N
Humidity71%
Visibility—
Dew point66°
Fri, 2176° / 67°0
76 °
Hammond, Friday, 21 August
Partly cloudy. High 76°, low 67°.
Pressure29.97 inHg
Wind9.6 mph NE
Humidity61%
Visibility—
Dew point60°
Sat, 2276° / 63°0
76 °
Hammond, Saturday, 22 August
Light rain. High 76°, low 63°.
Pressure29.91 inHg
Wind16.6 mph N
Humidity67%
Visibility—
Dew point62°
Sun, 2364° / 55°0
64 °
Hammond, Sunday, 23 August
Mostly clear. High 64°, low 55°.
Pressure30.24 inHg
Wind14.9 mph NE
Humidity47%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2480° / 66°0.14
80 °
Hammond, Monday, 24 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.14 in
Chance of precipitation28%
Record high98° (2023)
Record low57° (1966)
Tue, 2580° / 66°0.07
80 °
Hammond, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.07 in
Chance of precipitation27%
Record high92° (2021)
Record low53° (2017)
Wed, 2681° / 67°0.17
81 °
Hammond, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low67°
Average precipitation0.17 in
Chance of precipitation35%
Record high94° (2024)
Record low54° (2025)
Thu, 2781° / 67°0.14
81 °
Hammond, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low67°
Average precipitation0.14 in
Chance of precipitation37%
Record high96° (2024)
Record low54° (2025)
Fri, 2880° / 67°0.15
80 °
Hammond, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low67°
Average precipitation0.15 in
Chance of precipitation37%
Record high92° (1984)
Record low51° (1986)
Sat, 2980° / 66°0.1
80 °
Hammond, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.1 in
Chance of precipitation28%
Record high93° (1984)
Record low49° (1965)
Sun, 3079° / 66°0.09
79 °
Hammond, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low66°
Average precipitation0.09 in
Chance of precipitation30%
Record high92° (2013)
Record low54° (1986)
Mon, 3179° / 65°0.06
79 °
Hammond, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.06 in
Chance of precipitation23%
Record high89° (2012)
Record low55° (2023)
Tue, 0179° / 65°0.13
79 °
Hammond, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.13 in
Chance of precipitation30%
Record high94° (2011)
Record low54° (1967)
Wed, 0279° / 65°0.06
79 °
Hammond, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.06 in
Chance of precipitation27%
Record high92° (2011)
Record low52° (1965)
Thu, 0379° / 65°0.07
79 °
Hammond, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.07 in
Chance of precipitation23%
Record high93° (2023)
Record low53° (1974)
Fri, 0478° / 64°0.09
78 °
Hammond, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.09 in
Chance of precipitation33%
Record high91° (2023)
Record low50° (2025)
Sat, 0578° / 64°0.07
78 °
Hammond, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.07 in
Chance of precipitation27%
Record high90° (2023)
Record low53° (2010)
Sun, 0677° / 64°0.1
77 °
Hammond, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.1 in
Chance of precipitation37%
Record high91° (1990)
Record low49° (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 Hammond, IN 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 Hammond, IN 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.