Monthly outlook for Harahan, LA: average high 93.5°, average low 76.9°. That is 3.1° above the climate normal for August. Precipitation is expected on 5 days (about 1.4 inches), against a normal of 9 days and 2.6 inches. The warmest day looks like 13 August (96°), the coolest 9 August (74.4°).
93.5°/76.9°
Average high / low
+3.1°
Above normal
5 / 9
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
93.4°
87.7°
+3.1°
18 August – 27 August
93.8°
87.8°
+3.3°
28 August – 6 September
at normal
86.1°
—
August records over 66 years
102.6°27 August 2023All-time high
66.4°14 August 2004All-time low
Climate normals and records are computed from the nearest reference point — Metairie (4 mi).
Sun, 0991° / 74°0.08
91 °
Harahan, Sunday, 9 August
Light rain. High 91°, low 74°.
Pressure30.09 inHg
Wind7.7 mph NE
Humidity59%
Visibility6.2 mi
Dew point72°
Mon, 1093° / 75°0.03
93 °
Harahan, Monday, 10 August
Light rain. High 93°, low 75°.
Pressure30.12 inHg
Wind2.9 mph E
Humidity53%
Visibility6.2 mi
Dew point72°
Tue, 1194° / 78°0
94 °
Harahan, Tuesday, 11 August
Light rain. High 94°, low 78°.
Pressure30.09 inHg
Wind2.8 mph SE
Humidity49%
Visibility6.2 mi
Dew point71°
Wed, 1296° / 78°0.02
96 °
Harahan, Wednesday, 12 August
Light rain. High 96°, low 78°.
Pressure30.03 inHg
Wind2.7 mph W
Humidity50%
Visibility6.2 mi
Dew point72°
Thu, 1396° / 77°0
96 °
Harahan, Thursday, 13 August
Partly cloudy. High 96°, low 77°.
Pressure30.00 inHg
Wind11.8 mph S
Humidity45%
Visibility—
Dew point68°
Fri, 1494° / 77°0
94 °
Harahan, Friday, 14 August
Overcast. High 94°, low 77°.
Pressure30.09 inHg
Wind10 mph SE
Humidity47%
Visibility—
Dew point69°
Sat, 1594° / 79°0.04
94 °
Harahan, Saturday, 15 August
Light rain. High 94°, low 79°.
Pressure30.15 inHg
Wind8.3 mph NE
Humidity59%
Visibility—
Dew point73°
Sun, 1693° / 78°0.08
93 °
Harahan, Sunday, 16 August
Light rain. High 93°, low 78°.
Pressure30.15 inHg
Wind8.1 mph N
Humidity53%
Visibility—
Dew point71°
Mon, 1792° / 76°1.01
92 °
Harahan, Monday, 17 August
Heavy rain. High 92°, low 76°.
Pressure30.09 inHg
Wind11.2 mph W
Humidity53%
Visibility—
Dew point71°
Tue, 1893° / 75°0.04
93 °
Harahan, Tuesday, 18 August
Light rain. High 93°, low 75°.
Pressure30.06 inHg
Wind7.7 mph SW
Humidity48%
Visibility—
Dew point69°
Wed, 1993° / 77°0
93 °
Harahan, Wednesday, 19 August
Light rain. High 93°, low 77°.
Pressure30.03 inHg
Wind8.7 mph SW
Humidity53%
Visibility—
Dew point71°
Thu, 2094° / 78°0.03
94 °
Harahan, Thursday, 20 August
Light rain. High 94°, low 78°.
Pressure30.00 inHg
Wind8 mph SW
Humidity52%
Visibility—
Dew point71°
Fri, 2193° / 77°0.01
93 °
Harahan, Friday, 21 August
Light rain. High 93°, low 77°.
Pressure29.97 inHg
Wind10.7 mph S
Humidity53%
Visibility—
Dew point71°
Sat, 2295° / 77°0.02
95 °
Harahan, Saturday, 22 August
Light rain. High 95°, low 77°.
Pressure29.94 inHg
Wind10.9 mph SW
Humidity48%
Visibility—
Dew point69°
Sun, 2395° / 78°0
95 °
Harahan, Sunday, 23 August
Clear. High 95°, low 78°.
Pressure29.91 inHg
Wind7.8 mph W
Humidity48%
Visibility—
Dew point70°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2488° / 77°0.18
88 °
Harahan, Monday, 24 August
Climate normal for this date — 60-year average.
Average high88°
Average low77°
Average precipitation0.18 in
Chance of precipitation50%
Record high98° (2023)
Record low70° (2009)
Tue, 2587° / 77°0.18
87 °
Harahan, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.18 in
Chance of precipitation57%
Record high98° (2023)
Record low71° (1966)
Wed, 2687° / 77°0.21
87 °
Harahan, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.21 in
Chance of precipitation55%
Record high101° (2023)
Record low71° (1966)
Thu, 2787° / 77°0.17
87 °
Harahan, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.17 in
Chance of precipitation58%
Record high103° (2023)
Record low71° (2009)
Fri, 2887° / 77°0.25
87 °
Harahan, Friday, 28 August
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.25 in
Chance of precipitation60%
Record high97° (1998)
Record low71° (2015)
Sat, 2986° / 77°0.56
86 °
Harahan, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.56 in
Chance of precipitation60%
Record high98° (2000)
Record low70° (1992)
Sun, 3087° / 77°0.29
87 °
Harahan, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.29 in
Chance of precipitation63%
Record high97° (2000)
Record low70° (1992)
Mon, 3187° / 77°0.13
87 °
Harahan, Monday, 31 August
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.13 in
Chance of precipitation53%
Record high94° (2000)
Record low72° (1968)
Tue, 0186° / 77°0.22
86 °
Harahan, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation60%
Record high96° (2000)
Record low72° (1968)
Wed, 0286° / 76°0.23
86 °
Harahan, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high86°
Average low76°
Average precipitation0.23 in
Chance of precipitation55%
Record high99° (2000)
Record low68° (1967)
Thu, 0386° / 76°0.21
86 °
Harahan, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high86°
Average low76°
Average precipitation0.21 in
Chance of precipitation60%
Record high94° (2000)
Record low70° (1967)
Fri, 0486° / 76°0.26
86 °
Harahan, Friday, 4 September
Climate normal for this date — 60-year average.
Average high86°
Average low76°
Average precipitation0.26 in
Chance of precipitation58%
Record high97° (2000)
Record low69° (1974)
Sat, 0585° / 76°0.31
85 °
Harahan, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high85°
Average low76°
Average precipitation0.31 in
Chance of precipitation50%
Record high94° (2000)
Record low69° (1974)
Sun, 0685° / 76°0.26
85 °
Harahan, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high85°
Average low76°
Average precipitation0.26 in
Chance of precipitation53%
Record high94° (2019)
Record low66° (2011)
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 Harahan, LA 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 Harahan, LA 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.