Monthly outlook for South Sulphur, TX: average high 105.3°, average low 78.2°. That is 7.2° above the climate normal for August. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 21 August (110.5°), the coolest 24 August (73.3°).
105.3°/78.2°
Average high / low
+7.2°
Above normal
2 / 4
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
104.4°
92.2°
+6.8°
19 August – 28 August
106.7°
92°
+8.1°
29 August – 7 September
at normal
89.3°
—
August records over 66 years
107.8°4 August 2011All-time high
59.4°28 August 1992All-time low
Climate normals and records are computed from the nearest reference point — Cumby (13 mi).
Mon, 10100° / 77°0
100 °
South Sulphur, Monday, 10 August
Clear. High 100°, low 77°.
Pressure30.00 inHg
Wind11.9 mph S
Humidity36%
Visibility6.2 mi
Dew point65°
Tue, 11103° / 79°0
103 °
South Sulphur, Tuesday, 11 August
Clear. High 103°, low 79°.
Pressure29.97 inHg
Wind14 mph SW
Humidity38%
Visibility6.2 mi
Dew point67°
Wed, 12106° / 79°0
106 °
South Sulphur, Wednesday, 12 August
Mostly clear. High 106°, low 79°.
Pressure29.91 inHg
Wind14 mph SW
Humidity32%
Visibility6.2 mi
Dew point64°
Thu, 13106° / 79°0
106 °
South Sulphur, Thursday, 13 August
Overcast. High 106°, low 79°.
Pressure29.91 inHg
Wind17.2 mph SW
Humidity31%
Visibility6.2 mi
Dew point61°
Fri, 14106° / 78°0
106 °
South Sulphur, Friday, 14 August
Clear. High 106°, low 78°.
Pressure29.97 inHg
Wind19.7 mph S
Humidity26%
Visibility—
Dew point56°
Sat, 15106° / 79°0
106 °
South Sulphur, Saturday, 15 August
Clear. High 106°, low 79°.
Pressure30.06 inHg
Wind20.6 mph S
Humidity28%
Visibility—
Dew point60°
Sun, 16107° / 79°0
107 °
South Sulphur, Sunday, 16 August
Clear. High 107°, low 79°.
Pressure30.03 inHg
Wind18.6 mph S
Humidity21%
Visibility—
Dew point52°
Mon, 17107° / 78°0
107 °
South Sulphur, Monday, 17 August
Clear. High 107°, low 78°.
Pressure29.97 inHg
Wind15.5 mph SW
Humidity21%
Visibility—
Dew point52°
Tue, 18106° / 79°0
106 °
South Sulphur, Tuesday, 18 August
Clear. High 106°, low 79°.
Pressure29.97 inHg
Wind16.2 mph S
Humidity27%
Visibility—
Dew point59°
Wed, 19107° / 81°0
107 °
South Sulphur, Wednesday, 19 August
Partly cloudy. High 107°, low 81°.
Pressure29.97 inHg
Wind15.7 mph SW
Humidity24%
Visibility—
Dew point58°
Thu, 20109° / 81°0
109 °
South Sulphur, Thursday, 20 August
Clear. High 109°, low 81°.
Pressure29.91 inHg
Wind15.3 mph S
Humidity18%
Visibility—
Dew point51°
Fri, 21111° / 80°0
111 °
South Sulphur, Friday, 21 August
Light rain. High 111°, low 80°.
Pressure29.85 inHg
Wind16.8 mph S
Humidity18%
Visibility—
Dew point52°
Sat, 22107° / 78°0.23
107 °
South Sulphur, Saturday, 22 August
Rain. High 107°, low 78°.
Pressure29.91 inHg
Wind13.9 mph N
Humidity23%
Visibility—
Dew point55°
Sun, 23104° / 75°0.23
104 °
South Sulphur, Sunday, 23 August
Light rain. High 104°, low 75°.
Pressure29.94 inHg
Wind18.9 mph SE
Humidity35%
Visibility—
Dew point64°
Mon, 24102° / 73°0
102 °
South Sulphur, Monday, 24 August
Partly cloudy. High 102°, low 73°.
Pressure30.03 inHg
Wind14.1 mph SE
Humidity41%
Visibility—
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2592° / 75°0.01
92 °
South Sulphur, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high92°
Average low75°
Average precipitation0.01 in
Chance of precipitation7%
Record high107° (2023)
Record low61° (1966)
Wed, 2692° / 75°0.04
92 °
South Sulphur, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high92°
Average low75°
Average precipitation0.04 in
Chance of precipitation22%
Record high106° (2023)
Record low65° (1966)
Thu, 2791° / 75°0.06
91 °
South Sulphur, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high91°
Average low75°
Average precipitation0.06 in
Chance of precipitation30%
Record high102° (2011)
Record low66° (1966)
Fri, 2891° / 74°0.06
91 °
South Sulphur, Friday, 28 August
Climate normal for this date — 60-year average.
Average high91°
Average low74°
Average precipitation0.06 in
Chance of precipitation30%
Record high103° (2011)
Record low59° (1992)
Sat, 2990° / 74°0.08
90 °
South Sulphur, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.08 in
Chance of precipitation23%
Record high101° (1984)
Record low62° (1986)
Sun, 3090° / 74°0.08
90 °
South Sulphur, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.08 in
Chance of precipitation22%
Record high101° (1990)
Record low62° (1986)
Mon, 3190° / 74°0.1
90 °
South Sulphur, Monday, 31 August
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.1 in
Chance of precipitation22%
Record high102° (2000)
Record low64° (2004)
Tue, 0190° / 73°0.09
90 °
South Sulphur, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high90°
Average low73°
Average precipitation0.09 in
Chance of precipitation30%
Record high105° (2000)
Record low65° (1967)
Wed, 0289° / 73°0.18
89 °
South Sulphur, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.18 in
Chance of precipitation38%
Record high103° (2000)
Record low62° (1967)
Thu, 0389° / 73°0.09
89 °
South Sulphur, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.09 in
Chance of precipitation32%
Record high105° (2000)
Record low60° (1974)
Fri, 0489° / 73°0.06
89 °
South Sulphur, Friday, 4 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.06 in
Chance of precipitation20%
Record high106° (2000)
Record low56° (1974)
Sat, 0589° / 72°0.15
89 °
South Sulphur, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high89°
Average low72°
Average precipitation0.15 in
Chance of precipitation22%
Record high101° (2012)
Record low55° (1974)
Sun, 0689° / 71°0.09
89 °
South Sulphur, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high89°
Average low71°
Average precipitation0.09 in
Chance of precipitation18%
Record high102° (2012)
Record low54° (1974)
Mon, 0789° / 71°0.06
89 °
South Sulphur, Monday, 7 September
Climate normal for this date — 60-year average.
Average high89°
Average low71°
Average precipitation0.06 in
Chance of precipitation18%
Record high104° (2023)
Record low59° (2017)
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 South Sulphur, TX 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 South Sulphur, TX 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.