Monthly outlook for Gretna Green, LA: average high 105.2°, average low 75.1°. That is 7.6° above the climate normal for August. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 6 days and 1.6 inches. The warmest day looks like 18 August (108.8°), the coolest 14 August (72.4°).
105.2°/75.1°
Average high / low
+7.6°
Above normal
3 / 6
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
104°
91.4°
+7°
19 August – 28 August
107.3°
91.3°
+8.9°
29 August – 7 September
at normal
89.2°
—
August records over 66 years
105.8°13 August 2007All-time high
60.3°15 August 2004All-time low
Climate normals and records are computed from the nearest reference point — Sicily Island (12 mi).
Mon, 10101° / 73°0.08
101 °
Gretna Green, Monday, 10 August
Rain. High 101°, low 73°.
Pressure30.09 inHg
Wind7.7 mph S
Humidity44%
Visibility6.2 mi
Dew point69°
Tue, 11103° / 74°0
103 °
Gretna Green, Tuesday, 11 August
Clear. High 103°, low 74°.
Pressure30.09 inHg
Wind8.3 mph SW
Humidity40%
Visibility6.2 mi
Dew point68°
Wed, 12104° / 74°0
104 °
Gretna Green, Wednesday, 12 August
Clear. High 104°, low 74°.
Pressure30.00 inHg
Wind8.8 mph SW
Humidity39%
Visibility6.2 mi
Dew point68°
Thu, 13105° / 76°0
105 °
Gretna Green, Thursday, 13 August
Partly cloudy. High 105°, low 76°.
Pressure30.00 inHg
Wind9.2 mph SW
Humidity37%
Visibility6.2 mi
Dew point67°
Fri, 14106° / 72°0
106 °
Gretna Green, Friday, 14 August
Clear. High 106°, low 72°.
Pressure30.06 inHg
Wind12.3 mph SW
Humidity22%
Visibility—
Dew point53°
Sat, 15105° / 75°0
105 °
Gretna Green, Saturday, 15 August
Clear. High 105°, low 75°.
Pressure30.12 inHg
Wind11.9 mph SE
Humidity28%
Visibility—
Dew point59°
Sun, 16104° / 75°0
104 °
Gretna Green, Sunday, 16 August
Partly cloudy. High 104°, low 75°.
Pressure30.09 inHg
Wind8.1 mph S
Humidity25%
Visibility—
Dew point57°
Mon, 17108° / 76°0.02
108 °
Gretna Green, Monday, 17 August
Light rain. High 108°, low 76°.
Pressure30.00 inHg
Wind11 mph SW
Humidity27%
Visibility—
Dew point61°
Tue, 18109° / 77°0
109 °
Gretna Green, Tuesday, 18 August
Clear. High 109°, low 77°.
Pressure29.94 inHg
Wind11.4 mph S
Humidity27%
Visibility—
Dew point61°
Wed, 19108° / 75°0
108 °
Gretna Green, Wednesday, 19 August
Clear. High 108°, low 75°.
Pressure29.91 inHg
Wind14.1 mph SW
Humidity24%
Visibility—
Dew point57°
Thu, 20106° / 78°0.06
106 °
Gretna Green, Thursday, 20 August
Light rain. High 106°, low 78°.
Pressure29.91 inHg
Wind14.8 mph SW
Humidity30%
Visibility—
Dew point60°
Fri, 21109° / 75°0.02
109 °
Gretna Green, Friday, 21 August
Light rain. High 109°, low 75°.
Pressure29.88 inHg
Wind13.7 mph SW
Humidity26%
Visibility—
Dew point60°
Sat, 22107° / 76°0
107 °
Gretna Green, Saturday, 22 August
Mostly clear. High 107°, low 76°.
Pressure29.94 inHg
Wind14.5 mph SW
Humidity28%
Visibility—
Dew point61°
Sun, 23108° / 77°0.07
108 °
Gretna Green, Sunday, 23 August
Light rain. High 108°, low 77°.
Pressure30.00 inHg
Wind12.9 mph SW
Humidity29%
Visibility—
Dew point62°
Mon, 24106° / 74°0.01
106 °
Gretna Green, Monday, 24 August
Light rain. High 106°, low 74°.
Pressure30.00 inHg
Wind14.4 mph NE
Humidity30%
Visibility—
Dew point61°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2591° / 75°0.06
91 °
Gretna Green, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high91°
Average low75°
Average precipitation0.06 in
Chance of precipitation28%
Record high103° (2023)
Record low64° (2009)
Wed, 2691° / 75°0.1
91 °
Gretna Green, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high91°
Average low75°
Average precipitation0.1 in
Chance of precipitation22%
Record high102° (2023)
Record low64° (1966)
Thu, 2791° / 75°0.08
91 °
Gretna Green, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high91°
Average low75°
Average precipitation0.08 in
Chance of precipitation33%
Record high104° (2023)
Record low65° (2015)
Fri, 2890° / 74°0.1
90 °
Gretna Green, Friday, 28 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.1 in
Chance of precipitation42%
Record high101° (2011)
Record low66° (2015)
Sat, 2990° / 74°0.19
90 °
Gretna Green, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.19 in
Chance of precipitation45%
Record high102° (2000)
Record low64° (1992)
Sun, 3090° / 74°0.17
90 °
Gretna Green, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.17 in
Chance of precipitation38%
Record high105° (2000)
Record low62° (1986)
Mon, 3190° / 74°0.09
90 °
Gretna Green, Monday, 31 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.09 in
Chance of precipitation32%
Record high105° (2000)
Record low65° (1968)
Tue, 0190° / 74°0.1
90 °
Gretna Green, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.1 in
Chance of precipitation38%
Record high103° (2000)
Record low66° (1967)
Wed, 0289° / 74°0.19
89 °
Gretna Green, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high89°
Average low74°
Average precipitation0.19 in
Chance of precipitation42%
Record high102° (2000)
Record low61° (1967)
Thu, 0389° / 74°0.2
89 °
Gretna Green, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high89°
Average low74°
Average precipitation0.2 in
Chance of precipitation42%
Record high103° (2000)
Record low64° (1967)
Fri, 0489° / 73°0.17
89 °
Gretna Green, Friday, 4 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.17 in
Chance of precipitation50%
Record high102° (2000)
Record low60° (1974)
Sat, 0588° / 73°0.15
88 °
Gretna Green, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high88°
Average low73°
Average precipitation0.15 in
Chance of precipitation33%
Record high98° (2019)
Record low59° (1974)
Sun, 0688° / 73°0.08
88 °
Gretna Green, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high88°
Average low73°
Average precipitation0.08 in
Chance of precipitation35%
Record high99° (2019)
Record low62° (2011)
Mon, 0788° / 72°0.06
88 °
Gretna Green, Monday, 7 September
Climate normal for this date — 60-year average.
Average high88°
Average low72°
Average precipitation0.06 in
Chance of precipitation32%
Record high100° (2019)
Record low57° (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 Gretna Green, 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 Gretna Green, 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.