Monthly outlook for Running Water, SD: average high 87.3°, average low 67.4°. That is 1.9° above the climate normal for August. Precipitation is expected on 6 days (about 4.9 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 11 August (98.9°), the coolest 13 August (61°).
87.3°/67.4°
Average high / low
+1.9°
Above normal
6 / 4
Wet days / normal
4.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
86.7°
83.7°
+1.6°
19 August – 28 August
88.4°
83.9°
+2.5°
29 August – 7 September
at normal
82°
—
August records over 66 years
105.4°30 August 2012All-time high
47.1°31 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Center (13 mi).
Mon, 1096° / 68°0
96 °
Running Water, Monday, 10 August
Partly cloudy. High 96°, low 68°.
Pressure29.83 inHg
Wind17.4 mph SE
Humidity31%
Visibility6.2 mi
Dew point57°
Tue, 1199° / 65°0.02
99 °
Running Water, Tuesday, 11 August
Light rain. High 99°, low 65°.
Pressure29.77 inHg
Wind14.2 mph NE
Humidity37%
Visibility6.2 mi
Dew point61°
Wed, 1294° / 67°0.15
94 °
Running Water, Wednesday, 12 August
Rain. High 94°, low 67°.
Pressure29.85 inHg
Wind8.9 mph E
Humidity49%
Visibility6.2 mi
Dew point65°
Thu, 1376° / 61°1.89
76 °
Running Water, Thursday, 13 August
Heavy rain. High 76°, low 61°.
Pressure30.00 inHg
Wind17.6 mph E
Humidity95%
Visibility—
Dew point60°
Fri, 1463° / 61°0.82
63 °
Running Water, Friday, 14 August
Rain. High 63°, low 61°.
Pressure30.12 inHg
Wind10.6 mph SE
Humidity97%
Visibility—
Dew point61°
Sat, 1574° / 62°0
74 °
Running Water, Saturday, 15 August
Overcast. High 74°, low 62°.
Pressure30.09 inHg
Wind8.4 mph SE
Humidity85%
Visibility—
Dew point64°
Sun, 1683° / 66°0
83 °
Running Water, Sunday, 16 August
Overcast. High 83°, low 66°.
Pressure30.15 inHg
Wind6.8 mph NE
Humidity65%
Visibility—
Dew point65°
Mon, 1790° / 67°0.01
90 °
Running Water, Monday, 17 August
Light rain. High 90°, low 67°.
Pressure29.97 inHg
Wind14 mph SE
Humidity59%
Visibility—
Dew point67°
Tue, 1898° / 73°0
98 °
Running Water, Tuesday, 18 August
Partly cloudy. High 98°, low 73°.
Pressure29.74 inHg
Wind17 mph S
Humidity50%
Visibility—
Dew point68°
Wed, 1995° / 76°0
95 °
Running Water, Wednesday, 19 August
Overcast. High 95°, low 76°.
Pressure29.74 inHg
Wind6.6 mph S
Humidity40%
Visibility—
Dew point65°
Thu, 2080° / 70°0.09
80 °
Running Water, Thursday, 20 August
Light rain. High 80°, low 70°.
Pressure29.94 inHg
Wind14.4 mph NE
Humidity82%
Visibility—
Dew point68°
Fri, 2186° / 66°0.22
86 °
Running Water, Friday, 21 August
Rain. High 86°, low 66°.
Pressure29.94 inHg
Wind14 mph E
Humidity74%
Visibility—
Dew point67°
Sat, 2297° / 69°0
97 °
Running Water, Saturday, 22 August
Overcast. High 97°, low 69°.
Pressure29.71 inHg
Wind12.6 mph SE
Humidity53%
Visibility—
Dew point65°
Sun, 2389° / 71°0.01
89 °
Running Water, Sunday, 23 August
Light rain. High 89°, low 71°.
Pressure29.85 inHg
Wind10 mph E
Humidity68%
Visibility—
Dew point69°
Mon, 2483° / 66°1.66
83 °
Running Water, Monday, 24 August
Heavy rain. High 83°, low 66°.
Pressure29.97 inHg
Wind24.4 mph NW
Humidity67%
Visibility—
Dew point67°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 65°0.11
84 °
Running Water, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.11 in
Chance of precipitation25%
Record high99° (1991)
Record low50° (2025)
Wed, 2684° / 66°0.09
84 °
Running Water, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.09 in
Chance of precipitation33%
Record high98° (1976)
Record low56° (1992)
Thu, 2783° / 65°0.09
83 °
Running Water, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.09 in
Chance of precipitation23%
Record high100° (1990)
Record low50° (1967)
Fri, 2884° / 65°0.09
84 °
Running Water, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.09 in
Chance of precipitation27%
Record high102° (2012)
Record low49° (1986)
Sat, 2984° / 65°0.05
84 °
Running Water, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.05 in
Chance of precipitation23%
Record high105° (2012)
Record low50° (2018)
Sun, 3083° / 64°0.06
83 °
Running Water, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.06 in
Chance of precipitation27%
Record high105° (2012)
Record low51° (2009)
Mon, 3182° / 64°0.12
82 °
Running Water, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.12 in
Chance of precipitation28%
Record high95° (1990)
Record low47° (1965)
Tue, 0181° / 64°0.04
81 °
Running Water, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.04 in
Chance of precipitation22%
Record high96° (1970)
Record low46° (1965)
Wed, 0283° / 64°0.05
83 °
Running Water, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.05 in
Chance of precipitation23%
Record high99° (2023)
Record low48° (1972)
Thu, 0382° / 64°0.07
82 °
Running Water, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.07 in
Chance of precipitation23%
Record high99° (2023)
Record low41° (1974)
Fri, 0482° / 63°0.1
82 °
Running Water, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.1 in
Chance of precipitation25%
Record high97° (2012)
Record low47° (1962)
Sat, 0581° / 63°0.07
81 °
Running Water, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.07 in
Chance of precipitation23%
Record high98° (1990)
Record low43° (1962)
Sun, 0682° / 63°0.06
82 °
Running Water, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.06 in
Chance of precipitation12%
Record high99° (1970)
Record low43° (2025)
Mon, 0780° / 62°0.06
80 °
Running Water, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.06 in
Chance of precipitation30%
Record high96° (1971)
Record low44° (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 Running Water, 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 Running Water, 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.