Monthly outlook for Martin, SD: average high 87.9°, average low 63.8°. That is 2.5° above the climate normal for August. Precipitation is expected on 5 days (about 1.7 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 10 August (103.4°), the coolest 19 August (58.2°).
87.9°/63.8°
Average high / low
+2.5°
Above normal
5 / 4
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
88.8°
83.3°
+3.1°
18 August – 27 August
86.5°
83.5°
+1.7°
28 August – 6 September
at normal
81.5°
—
August records over 66 years
103.1°29 August 2012All-time high
43.2°22 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Allen (12 mi).
Sun, 0995° / 69°0
95 °
Martin, Sunday, 9 August
Overcast. High 95°, low 69°.
Pressure29.77 inHg
Wind14.3 mph NE
Humidity23%
Visibility6.2 mi
Dew point49°
Mon, 10103° / 65°0
103 °
Martin, Monday, 10 August
Partly cloudy. High 103°, low 65°.
Pressure29.74 inHg
Wind8.4 mph SE
Humidity22%
Visibility6.2 mi
Dew point50°
Tue, 1198° / 63°0
98 °
Martin, Tuesday, 11 August
Light rain. High 98°, low 63°.
Pressure29.80 inHg
Wind13.1 mph NE
Humidity34%
Visibility6.2 mi
Dew point58°
Wed, 1295° / 63°0.03
95 °
Martin, Wednesday, 12 August
Light rain. High 95°, low 63°.
Pressure29.83 inHg
Wind14.9 mph SE
Humidity34%
Visibility6.2 mi
Dew point58°
Thu, 1366° / 61°0.58
66 °
Martin, Thursday, 13 August
Rain. High 66°, low 61°.
Pressure29.97 inHg
Wind25.8 mph NE
Humidity86%
Visibility—
Dew point60°
Fri, 1470° / 60°0
70 °
Martin, Friday, 14 August
Overcast. High 70°, low 60°.
Pressure30.03 inHg
Wind17.7 mph SE
Humidity60%
Visibility—
Dew point54°
Sat, 1583° / 64°0
83 °
Martin, Saturday, 15 August
Overcast. High 83°, low 64°.
Pressure30.12 inHg
Wind13.8 mph S
Humidity64%
Visibility—
Dew point59°
Sun, 1687° / 68°0.06
87 °
Martin, Sunday, 16 August
Light rain. High 87°, low 68°.
Pressure30.00 inHg
Wind7.1 mph NE
Humidity53%
Visibility—
Dew point60°
Mon, 1794° / 66°0.41
94 °
Martin, Monday, 17 August
Rain. High 94°, low 66°.
Pressure29.94 inHg
Wind16.1 mph SE
Humidity35%
Visibility—
Dew point55°
Tue, 1895° / 67°0.01
95 °
Martin, Tuesday, 18 August
Light rain. High 95°, low 67°.
Pressure29.91 inHg
Wind17.2 mph SE
Humidity24%
Visibility—
Dew point47°
Wed, 1978° / 58°0.02
78 °
Martin, Wednesday, 19 August
Light rain. High 78°, low 58°.
Pressure30.09 inHg
Wind18.9 mph NE
Humidity52%
Visibility—
Dew point52°
Thu, 2078° / 63°0.3
78 °
Martin, Thursday, 20 August
Rain. High 78°, low 63°.
Pressure29.94 inHg
Wind17.6 mph SE
Humidity64%
Visibility—
Dew point60°
Fri, 2189° / 65°0.23
89 °
Martin, Friday, 21 August
Rain. High 89°, low 65°.
Pressure29.71 inHg
Wind23.7 mph SW
Humidity41%
Visibility—
Dew point56°
Sat, 2289° / 64°0
89 °
Martin, Saturday, 22 August
Clear. High 89°, low 64°.
Pressure29.80 inHg
Wind18.6 mph N
Humidity21%
Visibility—
Dew point40°
Sun, 2390° / 62°0
90 °
Martin, Sunday, 23 August
Partly cloudy. High 90°, low 62°.
Pressure29.88 inHg
Wind16.6 mph SE
Humidity33%
Visibility—
Dew point47°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2483° / 63°0.05
83 °
Martin, Monday, 24 August
Climate normal for this date — 60-year average.
Average high83°
Average low63°
Average precipitation0.05 in
Chance of precipitation15%
Record high96° (2000)
Record low48° (1964)
Tue, 2583° / 63°0.04
83 °
Martin, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low63°
Average precipitation0.04 in
Chance of precipitation18%
Record high100° (2020)
Record low45° (1964)
Wed, 2683° / 63°0.08
83 °
Martin, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low63°
Average precipitation0.08 in
Chance of precipitation33%
Record high101° (1970)
Record low49° (1992)
Thu, 2783° / 62°0.06
83 °
Martin, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high100° (2010)
Record low44° (1992)
Fri, 2883° / 62°0.04
83 °
Martin, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low62°
Average precipitation0.04 in
Chance of precipitation17%
Record high98° (2012)
Record low47° (1988)
Sat, 2983° / 62°0.06
83 °
Martin, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low62°
Average precipitation0.06 in
Chance of precipitation25%
Record high103° (2012)
Record low51° (2018)
Sun, 3083° / 62°0.04
83 °
Martin, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low62°
Average precipitation0.04 in
Chance of precipitation18%
Record high98° (1990)
Record low45° (1992)
Mon, 3181° / 61°0.05
81 °
Martin, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low61°
Average precipitation0.05 in
Chance of precipitation22%
Record high99° (1960)
Record low46° (1993)
Tue, 0181° / 60°0.06
81 °
Martin, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low60°
Average precipitation0.06 in
Chance of precipitation18%
Record high96° (2012)
Record low45° (1965)
Wed, 0282° / 61°0.06
82 °
Martin, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low61°
Average precipitation0.06 in
Chance of precipitation20%
Record high99° (1960)
Record low42° (1974)
Thu, 0381° / 60°0.04
81 °
Martin, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low60°
Average precipitation0.04 in
Chance of precipitation13%
Record high96° (1960)
Record low41° (1974)
Fri, 0481° / 60°0.06
81 °
Martin, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low60°
Average precipitation0.06 in
Chance of precipitation18%
Record high99° (1960)
Record low39° (1962)
Sat, 0580° / 60°0.07
80 °
Martin, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low60°
Average precipitation0.07 in
Chance of precipitation18%
Record high98° (1998)
Record low41° (1965)
Sun, 0680° / 59°0.04
80 °
Martin, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low59°
Average precipitation0.04 in
Chance of precipitation15%
Record high98° (2002)
Record low41° (2025)
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 Martin, 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 Martin, 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.