Monthly outlook for Gretna, KS: average high 94°, average low 69.9°. That is 3.9° above the climate normal for August. Precipitation is expected on 5 days (about 1.1 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 11 August (112.9°), the coolest 21 August (62.5°).
94°/69.9°
Average high / low
+3.9°
Above normal
5 / 4
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
94.5°
86.8°
+4.2°
19 August – 28 August
93.2°
87.1°
+3.4°
29 August – 7 September
at normal
85.1°
—
August records over 66 years
106.2°16 August 1983All-time high
50.4°27 August 1992All-time low
Climate normals and records are computed from the nearest reference point — Phillipsburg (6 mi).
Mon, 10103° / 77°0
103 °
Gretna, Monday, 10 August
Overcast. High 103°, low 77°.
Pressure29.77 inHg
Wind10.3 mph SE
Humidity24%
Visibility6.2 mi
Dew point50°
Tue, 11113° / 77°0.04
113 °
Gretna, Tuesday, 11 August
Light rain. High 113°, low 77°.
Pressure29.68 inHg
Wind6.7 mph SW
Humidity18%
Visibility6.2 mi
Dew point52°
Wed, 12101° / 70°0
101 °
Gretna, Wednesday, 12 August
Partly cloudy. High 101°, low 70°.
Pressure29.77 inHg
Wind12.6 mph E
Humidity33%
Visibility6.2 mi
Dew point60°
Thu, 1390° / 69°0
90 °
Gretna, Thursday, 13 August
Light rain. High 90°, low 69°.
Pressure29.77 inHg
Wind18.7 mph NE
Humidity51%
Visibility—
Dew point64°
Fri, 1469° / 65°0.07
69 °
Gretna, Friday, 14 August
Light rain. High 69°, low 65°.
Pressure30.00 inHg
Wind13.8 mph NE
Humidity94%
Visibility—
Dew point64°
Sat, 1583° / 66°0.01
83 °
Gretna, Saturday, 15 August
Light rain. High 83°, low 66°.
Pressure30.09 inHg
Wind5.4 mph NW
Humidity57%
Visibility—
Dew point62°
Sun, 1688° / 68°0.57
88 °
Gretna, Sunday, 16 August
Rain. High 88°, low 68°.
Pressure30.06 inHg
Wind9 mph SE
Humidity67%
Visibility—
Dew point67°
Mon, 1796° / 68°0.13
96 °
Gretna, Monday, 17 August
Light rain. High 96°, low 68°.
Pressure30.00 inHg
Wind10 mph SE
Humidity48%
Visibility—
Dew point63°
Tue, 1899° / 70°0.07
99 °
Gretna, Tuesday, 18 August
Light rain. High 99°, low 70°.
Pressure29.94 inHg
Wind20.7 mph N
Humidity42%
Visibility—
Dew point63°
Wed, 1993° / 74°0
93 °
Gretna, Wednesday, 19 August
Clear. High 93°, low 74°.
Pressure29.91 inHg
Wind17.1 mph NE
Humidity43%
Visibility—
Dew point63°
Thu, 2087° / 66°0
87 °
Gretna, Thursday, 20 August
Overcast. High 87°, low 66°.
Pressure29.94 inHg
Wind16.6 mph E
Humidity44%
Visibility—
Dew point55°
Fri, 2189° / 63°0.01
89 °
Gretna, Friday, 21 August
Light rain. High 89°, low 63°.
Pressure29.88 inHg
Wind14.3 mph SE
Humidity50%
Visibility—
Dew point58°
Sat, 2296° / 67°0.24
96 °
Gretna, Saturday, 22 August
Rain. High 96°, low 67°.
Pressure29.85 inHg
Wind8.5 mph NW
Humidity23%
Visibility—
Dew point46°
Sun, 2398° / 70°0
98 °
Gretna, Sunday, 23 August
Overcast. High 98°, low 70°.
Pressure29.88 inHg
Wind13.1 mph S
Humidity30%
Visibility—
Dew point56°
Mon, 2495° / 73°0
95 °
Gretna, Monday, 24 August
Overcast. High 95°, low 73°.
Pressure29.83 inHg
Wind12.4 mph S
Humidity33%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2588° / 67°0.1
88 °
Gretna, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high88°
Average low67°
Average precipitation0.1 in
Chance of precipitation28%
Record high100° (1983)
Record low55° (1964)
Wed, 2687° / 68°0.06
87 °
Gretna, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high87°
Average low68°
Average precipitation0.06 in
Chance of precipitation27%
Record high100° (1976)
Record low54° (1992)
Thu, 2786° / 67°0.06
86 °
Gretna, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low67°
Average precipitation0.06 in
Chance of precipitation22%
Record high99° (1990)
Record low50° (1992)
Fri, 2886° / 67°0.11
86 °
Gretna, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low67°
Average precipitation0.11 in
Chance of precipitation20%
Record high102° (2000)
Record low54° (1992)
Sat, 2986° / 66°0.06
86 °
Gretna, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low66°
Average precipitation0.06 in
Chance of precipitation20%
Record high99° (2013)
Record low56° (2018)
Sun, 3086° / 66°0.07
86 °
Gretna, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high86°
Average low66°
Average precipitation0.07 in
Chance of precipitation22%
Record high100° (2000)
Record low53° (1968)
Mon, 3185° / 67°0.06
85 °
Gretna, Monday, 31 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.06 in
Chance of precipitation15%
Record high104° (1985)
Record low52° (1993)
Tue, 0185° / 66°0.09
85 °
Gretna, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.09 in
Chance of precipitation22%
Record high106° (2011)
Record low52° (1965)
Wed, 0285° / 66°0.09
85 °
Gretna, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.09 in
Chance of precipitation25%
Record high101° (2023)
Record low51° (1974)
Thu, 0385° / 65°0.07
85 °
Gretna, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high85°
Average low65°
Average precipitation0.07 in
Chance of precipitation17%
Record high98° (2023)
Record low43° (1974)
Fri, 0485° / 65°0.05
85 °
Gretna, Friday, 4 September
Climate normal for this date — 60-year average.
Average high85°
Average low65°
Average precipitation0.05 in
Chance of precipitation23%
Record high97° (2023)
Record low49° (1974)
Sat, 0585° / 65°0.05
85 °
Gretna, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high85°
Average low65°
Average precipitation0.05 in
Chance of precipitation18%
Record high99° (1976)
Record low47° (1962)
Sun, 0685° / 64°0.04
85 °
Gretna, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high85°
Average low64°
Average precipitation0.04 in
Chance of precipitation22%
Record high100° (2013)
Record low49° (2025)
Mon, 0784° / 65°0.06
84 °
Gretna, Monday, 7 September
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.06 in
Chance of precipitation25%
Record high101° (1971)
Record low50° (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 Gretna, KS 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, KS 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.