Monthly outlook for Marty, SD: average high 63.6°, average low 45.8°. That is 1.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 11 October (80°), the coolest 25 October (32.7°).
63.6°/45.8°
Average high / low
+1.6°
Above normal
2 / 3
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
69°
61.8°
+4°
21 October – 30 October
54.6°
57.5°
-1.6°
31 October – 9 November
at normal
51.9°
—
October records over 66 years
91.9°2 October 1997All-time high
6.6°27 October 2020All-time low
Mon, 1271° / 52°0
71 °
Marty, Monday, 12 October
Clear. High 71°, low 52°.
Pressure29.68 inHg
Wind10.3 mph NW
Humidity59%
Visibility6.2 mi
Dew point52°
Tue, 1358° / 43°0
58 °
Marty, Tuesday, 13 October
Overcast. High 58°, low 43°.
Pressure30.03 inHg
Wind9.8 mph N
Humidity55%
Visibility6.2 mi
Dew point40°
Wed, 1463° / 46°0
63 °
Marty, Wednesday, 14 October
Clear. High 63°, low 46°.
Pressure30.21 inHg
Wind6 mph NE
Humidity51%
Visibility6.2 mi
Dew point39°
Thu, 1567° / 50°0.15
67 °
Marty, Thursday, 15 October
Light rain. High 67°, low 50°.
Pressure30.24 inHg
Wind9.1 mph NW
Humidity82%
Visibility6.2 mi
Dew point49°
Fri, 1656° / 42°0
56 °
Marty, Friday, 16 October
Clear. High 56°, low 42°.
Pressure30.74 inHg
Wind16.8 mph NW
Humidity45%
Visibility—
Dew point30°
Sat, 1765° / 42°0
65 °
Marty, Saturday, 17 October
Clear. High 65°, low 42°.
Pressure30.18 inHg
Wind19.7 mph S
Humidity34%
Visibility—
Dew point29°
Sun, 1875° / 49°0
75 °
Marty, Sunday, 18 October
Clear. High 75°, low 49°.
Pressure29.94 inHg
Wind16.8 mph S
Humidity26%
Visibility—
Dew point31°
Mon, 1975° / 51°0
75 °
Marty, Monday, 19 October
Clear. High 75°, low 51°.
Pressure29.94 inHg
Wind12.4 mph S
Humidity36%
Visibility—
Dew point41°
Tue, 2078° / 54°0.02
78 °
Marty, Tuesday, 20 October
Light rain. High 78°, low 54°.
Pressure29.68 inHg
Wind19.7 mph S
Humidity40%
Visibility—
Dew point45°
Wed, 2160° / 49°0.2
60 °
Marty, Wednesday, 21 October
Rain. High 60°, low 49°.
Pressure29.88 inHg
Wind17.8 mph NW
Humidity73%
Visibility—
Dew point43°
Thu, 2261° / 46°0
61 °
Marty, Thursday, 22 October
Overcast. High 61°, low 46°.
Pressure29.97 inHg
Wind24.1 mph NW
Humidity29%
Visibility—
Dew point25°
Fri, 2356° / 42°0
56 °
Marty, Friday, 23 October
Clear. High 56°, low 42°.
Pressure30.24 inHg
Wind18.7 mph NW
Humidity33%
Visibility—
Dew point22°
Sat, 2443° / 38°0
43 °
Marty, Saturday, 24 October
Overcast. High 43°, low 38°.
Pressure30.42 inHg
Wind16.8 mph NW
Humidity52%
Visibility—
Dew point26°
Sun, 2558° / 33°0
58 °
Marty, Sunday, 25 October
Clear. High 58°, low 33°.
Pressure30.18 inHg
Wind10 mph SW
Humidity38%
Visibility—
Dew point24°
Mon, 2649° / 34°0
49 °
Marty, Monday, 26 October
Mostly clear. High 49°, low 34°.
Pressure30.36 inHg
Wind20 mph NW
Humidity39%
Visibility—
Dew point19°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2757° / 40°0.05
57 °
Marty, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high57°
Average low40°
Average precipitation0.05 in
Chance of precipitation12%
Record high78° (1999)
Record low7° (2020)
Wed, 2856° / 39°0.04
56 °
Marty, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high56°
Average low39°
Average precipitation0.04 in
Chance of precipitation18%
Record high80° (2016)
Record low20° (2017)
Thu, 2955° / 38°0.07
55 °
Marty, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high55°
Average low38°
Average precipitation0.07 in
Chance of precipitation23%
Record high74° (1978)
Record low20° (1991)
Fri, 3053° / 38°0.11
53 °
Marty, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.11 in
Chance of precipitation27%
Record high76° (1965)
Record low17° (1991)
Sat, 3153° / 37°0.06
53 °
Marty, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.06 in
Chance of precipitation20%
Record high83° (2016)
Record low15° (2002)
Sun, 0153° / 37°0.04
53 °
Marty, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.04 in
Chance of precipitation13%
Record high76° (1990)
Record low13° (2002)
Mon, 0253° / 36°0.05
53 °
Marty, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.05 in
Chance of precipitation20%
Record high76° (2005)
Record low10° (1991)
Tue, 0352° / 36°0.05
52 °
Marty, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.05 in
Chance of precipitation18%
Record high75° (1978)
Record low5° (1991)
Wed, 0452° / 34°0.01
52 °
Marty, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low34°
Average precipitation0.01 in
Chance of precipitation7%
Record high74° (1978)
Record low-11° (1991)
Thu, 0553° / 35°0.03
53 °
Marty, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low35°
Average precipitation0.03 in
Chance of precipitation13%
Record high75° (2001)
Record low15° (1990)
Fri, 0652° / 35°0.02
52 °
Marty, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low35°
Average precipitation0.02 in
Chance of precipitation13%
Record high79° (2020)
Record low8° (2003)
Sat, 0752° / 34°0.02
52 °
Marty, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low34°
Average precipitation0.02 in
Chance of precipitation13%
Record high76° (2020)
Record low-5° (1991)
Sun, 0851° / 35°0.06
51 °
Marty, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.06 in
Chance of precipitation13%
Record high77° (1999)
Record low2° (1991)
Mon, 0948° / 34°0.11
48 °
Marty, Monday, 9 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.11 in
Chance of precipitation22%
Record high71° (1999)
Record low13° (2018)
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 Marty, 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 Marty, 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.