Monthly outlook for Greenville, OK: average high 108.7°, average low 80°. That is 8.9° above the climate normal for August. Precipitation is expected on 0 days (about 0.1 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 21 August (114°), the coolest 9 August (72.3°).
108.7°/80°
Average high / low
+8.9°
Above normal
0 / 4
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
107.4°
92.9°
+8.1°
19 August – 28 August
110.9°
92.3°
+10.3°
29 August – 7 September
at normal
89.3°
—
August records over 66 years
109.6°3 August 2011All-time high
57.4°25 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Lone Grove (14 mi).
Mon, 10103° / 78°0
103 °
Greenville, Monday, 10 August
Clear. High 103°, low 78°.
Pressure29.97 inHg
Wind12.6 mph S
Humidity31%
Visibility6.2 mi
Dew point63°
Tue, 11106° / 80°0
106 °
Greenville, Tuesday, 11 August
Clear. High 106°, low 80°.
Pressure29.91 inHg
Wind14.7 mph SW
Humidity30%
Visibility6.2 mi
Dew point64°
Wed, 12108° / 81°0
108 °
Greenville, Wednesday, 12 August
Overcast. High 108°, low 81°.
Pressure29.85 inHg
Wind14.4 mph SW
Humidity28%
Visibility6.2 mi
Dew point62°
Thu, 13107° / 82°0
107 °
Greenville, Thursday, 13 August
Partly cloudy. High 107°, low 82°.
Pressure29.85 inHg
Wind18.3 mph S
Humidity22%
Visibility—
Dew point55°
Fri, 14107° / 81°0
107 °
Greenville, Friday, 14 August
Clear. High 107°, low 81°.
Pressure29.94 inHg
Wind18.8 mph S
Humidity26%
Visibility—
Dew point59°
Sat, 15108° / 82°0
108 °
Greenville, Saturday, 15 August
Clear. High 108°, low 82°.
Pressure30.03 inHg
Wind17.2 mph S
Humidity24%
Visibility—
Dew point58°
Sun, 16110° / 82°0
110 °
Greenville, Sunday, 16 August
Clear. High 110°, low 82°.
Pressure30.06 inHg
Wind10.1 mph W
Humidity22%
Visibility—
Dew point56°
Mon, 17112° / 80°0
112 °
Greenville, Monday, 17 August
Mostly clear. High 112°, low 80°.
Pressure29.97 inHg
Wind13.7 mph S
Humidity15%
Visibility—
Dew point48°
Tue, 18112° / 80°0
112 °
Greenville, Tuesday, 18 August
Clear. High 112°, low 80°.
Pressure29.88 inHg
Wind15.4 mph S
Humidity16%
Visibility—
Dew point49°
Wed, 19113° / 80°0
113 °
Greenville, Wednesday, 19 August
Mostly clear. High 113°, low 80°.
Pressure29.88 inHg
Wind15.5 mph S
Humidity16%
Visibility—
Dew point50°
Thu, 20113° / 83°0
113 °
Greenville, Thursday, 20 August
Overcast. High 113°, low 83°.
Pressure29.88 inHg
Wind14.7 mph S
Humidity15%
Visibility—
Dew point49°
Fri, 21114° / 83°0.03
114 °
Greenville, Friday, 21 August
Light rain. High 114°, low 83°.
Pressure29.88 inHg
Wind14 mph S
Humidity17%
Visibility—
Dew point52°
Sat, 22111° / 80°0.03
111 °
Greenville, Saturday, 22 August
Light rain. High 111°, low 80°.
Pressure29.85 inHg
Wind14.8 mph SE
Humidity20%
Visibility—
Dew point55°
Sun, 23107° / 76°0.02
107 °
Greenville, Sunday, 23 August
Light rain. High 107°, low 76°.
Pressure29.88 inHg
Wind16.2 mph SE
Humidity26%
Visibility—
Dew point59°
Mon, 24108° / 80°0
108 °
Greenville, Monday, 24 August
Overcast. High 108°, low 80°.
Pressure29.88 inHg
Wind12.1 mph SE
Humidity20%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2592° / 75°0.03
92 °
Greenville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high92°
Average low75°
Average precipitation0.03 in
Chance of precipitation13%
Record high103° (2023)
Record low57° (1966)
Wed, 2692° / 75°0.06
92 °
Greenville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high92°
Average low75°
Average precipitation0.06 in
Chance of precipitation22%
Record high104° (1999)
Record low61° (1966)
Thu, 2791° / 75°0.09
91 °
Greenville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high91°
Average low75°
Average precipitation0.09 in
Chance of precipitation28%
Record high105° (2011)
Record low65° (1966)
Fri, 2891° / 74°0.06
91 °
Greenville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high91°
Average low74°
Average precipitation0.06 in
Chance of precipitation23%
Record high105° (2011)
Record low62° (1992)
Sat, 2990° / 74°0.08
90 °
Greenville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.08 in
Chance of precipitation23%
Record high104° (1984)
Record low64° (1987)
Sun, 3091° / 74°0.07
91 °
Greenville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high91°
Average low74°
Average precipitation0.07 in
Chance of precipitation23%
Record high103° (2011)
Record low65° (1988)
Mon, 3190° / 74°0.07
90 °
Greenville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.07 in
Chance of precipitation27%
Record high103° (2000)
Record low65° (2009)
Tue, 0189° / 73°0.16
89 °
Greenville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.16 in
Chance of precipitation32%
Record high105° (2000)
Record low63° (1986)
Wed, 0289° / 73°0.08
89 °
Greenville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.08 in
Chance of precipitation30%
Record high104° (2000)
Record low60° (1974)
Thu, 0389° / 73°0.07
89 °
Greenville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.07 in
Chance of precipitation32%
Record high106° (2000)
Record low56° (1974)
Fri, 0489° / 73°0.09
89 °
Greenville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.09 in
Chance of precipitation23%
Record high108° (2000)
Record low57° (1974)
Sat, 0589° / 72°0.07
89 °
Greenville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high89°
Average low72°
Average precipitation0.07 in
Chance of precipitation18%
Record high103° (1998)
Record low55° (1974)
Sun, 0689° / 71°0.14
89 °
Greenville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high89°
Average low71°
Average precipitation0.14 in
Chance of precipitation20%
Record high99° (1990)
Record low56° (1974)
Mon, 0789° / 72°0.05
89 °
Greenville, Monday, 7 September
Climate normal for this date — 60-year average.
Average high89°
Average low72°
Average precipitation0.05 in
Chance of precipitation23%
Record high103° (2012)
Record low58° (1974)
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 Greenville, OK 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 Greenville, OK 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.