Monthly outlook for St. Francis, SD: average high 89.2°, average low 66.2°. That is 3.1° above the climate normal for August. Precipitation is expected on 5 days (about 2.1 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 19 August (102.4°), the coolest 14 August (58°).
89.2°/66.2°
Average high / low
+3.1°
Above normal
5 / 4
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
87.9°
83.4°
+2.5°
19 August – 28 August
91.3°
83.7°
+4.2°
29 August – 7 September
at normal
81.5°
—
August records over 66 years
105.3°29 August 2012All-time high
43°23 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Two Strike (5 mi).
Mon, 10100° / 64°0.01
100 °
St. Francis, Monday, 10 August
Light rain. High 100°, low 64°.
Pressure29.77 inHg
Wind10.9 mph SE
Humidity30%
Visibility6.2 mi
Dew point56°
Tue, 1196° / 62°0.01
96 °
St. Francis, Tuesday, 11 August
Light rain. High 96°, low 62°.
Pressure29.83 inHg
Wind13.1 mph NE
Humidity41%
Visibility6.2 mi
Dew point59°
Wed, 1295° / 63°0.01
95 °
St. Francis, Wednesday, 12 August
Light rain. High 95°, low 63°.
Pressure29.85 inHg
Wind9.6 mph E
Humidity38%
Visibility6.2 mi
Dew point59°
Thu, 1371° / 59°1
71 °
St. Francis, Thursday, 13 August
Rain. High 71°, low 59°.
Pressure29.97 inHg
Wind15.6 mph NE
Humidity96%
Visibility—
Dew point60°
Fri, 1462° / 58°0.01
62 °
St. Francis, Friday, 14 August
Light rain. High 62°, low 58°.
Pressure30.06 inHg
Wind14.6 mph SE
Humidity93%
Visibility—
Dew point58°
Sat, 1576° / 60°0.02
76 °
St. Francis, Saturday, 15 August
Light rain. High 76°, low 60°.
Pressure30.06 inHg
Wind12 mph S
Humidity72%
Visibility—
Dew point61°
Sun, 1686° / 64°0.01
86 °
St. Francis, Sunday, 16 August
Light rain. High 86°, low 64°.
Pressure30.12 inHg
Wind13.3 mph SE
Humidity45%
Visibility—
Dew point56°
Mon, 1797° / 67°0
97 °
St. Francis, Monday, 17 August
Clear. High 97°, low 67°.
Pressure29.85 inHg
Wind18.6 mph S
Humidity40%
Visibility—
Dew point60°
Tue, 18101° / 75°0
101 °
St. Francis, Tuesday, 18 August
Mostly clear. High 101°, low 75°.
Pressure29.74 inHg
Wind16.9 mph S
Humidity22%
Visibility—
Dew point50°
Wed, 19102° / 76°0
102 °
St. Francis, Wednesday, 19 August
Overcast. High 102°, low 76°.
Pressure29.74 inHg
Wind12.6 mph N
Humidity21%
Visibility—
Dew point49°
Thu, 2086° / 73°0.01
86 °
St. Francis, Thursday, 20 August
Light rain. High 86°, low 73°.
Pressure29.97 inHg
Wind16.5 mph NE
Humidity27%
Visibility—
Dew point45°
Fri, 2192° / 67°0.31
92 °
St. Francis, Friday, 21 August
Light rain. High 92°, low 67°.
Pressure29.85 inHg
Wind21 mph S
Humidity50%
Visibility—
Dew point62°
Sat, 2291° / 72°0.14
91 °
St. Francis, Saturday, 22 August
Rain. High 91°, low 72°.
Pressure29.74 inHg
Wind15.6 mph NW
Humidity39%
Visibility—
Dew point58°
Sun, 2390° / 65°0.39
90 °
St. Francis, Sunday, 23 August
Rain. High 90°, low 65°.
Pressure29.88 inHg
Wind19.3 mph SE
Humidity61%
Visibility—
Dew point63°
Mon, 2486° / 64°0.15
86 °
St. Francis, Monday, 24 August
Light rain. High 86°, low 64°.
Pressure29.97 inHg
Wind14.3 mph SE
Humidity54%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 63°0.02
84 °
St. Francis, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low63°
Average precipitation0.02 in
Chance of precipitation17%
Record high100° (1991)
Record low46° (1964)
Wed, 2684° / 63°0.06
84 °
St. Francis, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low63°
Average precipitation0.06 in
Chance of precipitation27%
Record high102° (1970)
Record low49° (1992)
Thu, 2783° / 62°0.09
83 °
St. Francis, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low62°
Average precipitation0.09 in
Chance of precipitation28%
Record high98° (1973)
Record low46° (1992)
Fri, 2883° / 63°0.07
83 °
St. Francis, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low63°
Average precipitation0.07 in
Chance of precipitation15%
Record high100° (2012)
Record low47° (1987)
Sat, 2983° / 62°0.06
83 °
St. Francis, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low62°
Average precipitation0.06 in
Chance of precipitation20%
Record high105° (2012)
Record low49° (1988)
Sun, 3083° / 62°0.07
83 °
St. Francis, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low62°
Average precipitation0.07 in
Chance of precipitation23%
Record high96° (1990)
Record low47° (1992)
Mon, 3181° / 62°0.04
81 °
St. Francis, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low62°
Average precipitation0.04 in
Chance of precipitation22%
Record high98° (1975)
Record low46° (1993)
Tue, 0181° / 61°0.08
81 °
St. Francis, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low61°
Average precipitation0.08 in
Chance of precipitation25%
Record high97° (2012)
Record low45° (1965)
Wed, 0282° / 61°0.08
82 °
St. Francis, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low61°
Average precipitation0.08 in
Chance of precipitation18%
Record high98° (1983)
Record low43° (1974)
Thu, 0382° / 61°0.03
82 °
St. Francis, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low61°
Average precipitation0.03 in
Chance of precipitation18%
Record high96° (1960)
Record low39° (1974)
Fri, 0482° / 60°0.07
82 °
St. Francis, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low60°
Average precipitation0.07 in
Chance of precipitation17%
Record high99° (1998)
Record low40° (1962)
Sat, 0581° / 60°0.07
81 °
St. Francis, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low60°
Average precipitation0.07 in
Chance of precipitation15%
Record high99° (1998)
Record low42° (1965)
Sun, 0681° / 59°0.04
81 °
St. Francis, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low59°
Average precipitation0.04 in
Chance of precipitation13%
Record high97° (1976)
Record low42° (2025)
Mon, 0779° / 58°0.03
79 °
St. Francis, Monday, 7 September
Climate normal for this date — 60-year average.
Average high79°
Average low58°
Average precipitation0.03 in
Chance of precipitation23%
Record high98° (2022)
Record low42° (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 St. Francis, SD 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 St. Francis, SD 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.