Monthly outlook for Marvin, SD: average high 59.8°, average low 44.8°. That is 1.3° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 10 October (79.7°), the coolest 17 October (34.4°).
59.8°/44.8°
Average high / low
+1.3°
Above normal
3 / 4
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
61.7°
58.5°
+1.8°
18 October – 27 October
56.5°
54.6°
+1.1°
28 October – 6 November
at normal
48.8°
—
October records over 66 years
87.4°1 October 2023All-time high
12°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Wilmot (11 mi).
Fri, 0972° / 44°0
72 °
Marvin, Friday, 9 October
Mostly clear. High 72°, low 44°.
Pressure29.94 inHg
Wind11.1 mph SE
Humidity60%
Visibility6.2 mi
Dew point47°
Sat, 1080° / 58°0
80 °
Marvin, Saturday, 10 October
Clear. High 80°, low 58°.
Pressure29.56 inHg
Wind26.3 mph SW
Humidity43%
Visibility6.2 mi
Dew point52°
Sun, 1171° / 51°0
71 °
Marvin, Sunday, 11 October
Overcast. High 71°, low 51°.
Pressure29.74 inHg
Wind6 mph NE
Humidity70%
Visibility6.2 mi
Dew point58°
Mon, 1253° / 45°0.09
53 °
Marvin, Monday, 12 October
Light rain. High 53°, low 45°.
Pressure29.94 inHg
Wind9.6 mph N
Humidity87%
Visibility6.2 mi
Dew point46°
Tue, 1352° / 46°0
52 °
Marvin, Tuesday, 13 October
Overcast. High 52°, low 46°.
Pressure30.12 inHg
Wind10.1 mph N
Humidity65%
Visibility—
Dew point40°
Wed, 1458° / 46°0.18
58 °
Marvin, Wednesday, 14 October
Rain. High 58°, low 46°.
Pressure29.71 inHg
Wind14.9 mph SE
Humidity76%
Visibility—
Dew point49°
Thu, 1567° / 46°0.03
67 °
Marvin, Thursday, 15 October
Light rain. High 67°, low 46°.
Pressure29.41 inHg
Wind28.7 mph SW
Humidity61%
Visibility—
Dew point53°
Fri, 1644° / 41°0
44 °
Marvin, Friday, 16 October
Overcast. High 44°, low 41°.
Pressure30.53 inHg
Wind19.3 mph NW
Humidity64%
Visibility—
Dew point31°
Sat, 1754° / 34°0
54 °
Marvin, Saturday, 17 October
Clear. High 54°, low 34°.
Pressure30.65 inHg
Wind10 mph S
Humidity42%
Visibility—
Dew point26°
Sun, 1849° / 43°0.03
49 °
Marvin, Sunday, 18 October
Light rain. High 49°, low 43°.
Pressure30.27 inHg
Wind15.9 mph S
Humidity72%
Visibility—
Dew point40°
Mon, 1957° / 49°0.01
57 °
Marvin, Monday, 19 October
Light rain. High 57°, low 49°.
Pressure29.94 inHg
Wind15.4 mph SW
Humidity82%
Visibility—
Dew point45°
Tue, 2063° / 47°0
63 °
Marvin, Tuesday, 20 October
Clear. High 63°, low 47°.
Pressure30.03 inHg
Wind18.9 mph W
Humidity33%
Visibility—
Dew point30°
Wed, 2166° / 45°0
66 °
Marvin, Wednesday, 21 October
Overcast. High 66°, low 45°.
Pressure29.97 inHg
Wind24.1 mph W
Humidity31%
Visibility—
Dew point30°
Thu, 2249° / 41°0.11
49 °
Marvin, Thursday, 22 October
Light rain. High 49°, low 41°.
Pressure29.97 inHg
Wind25.6 mph W
Humidity77%
Visibility—
Dew point37°
Fri, 2355° / 38°0
55 °
Marvin, Friday, 23 October
Overcast. High 55°, low 38°.
Pressure29.83 inHg
Wind21.8 mph SE
Humidity48%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2453° / 38°0.04
53 °
Marvin, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.04 in
Chance of precipitation17%
Record high78° (1989)
Record low17° (2020)
Sun, 2553° / 39°0.05
53 °
Marvin, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.05 in
Chance of precipitation17%
Record high80° (1989)
Record low19° (2020)
Mon, 2654° / 38°0.04
54 °
Marvin, Monday, 26 October
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.04 in
Chance of precipitation13%
Record high78° (1989)
Record low13° (2020)
Tue, 2753° / 38°0.07
53 °
Marvin, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.07 in
Chance of precipitation28%
Record high73° (1999)
Record low12° (2020)
Wed, 2852° / 37°0.03
52 °
Marvin, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.03 in
Chance of precipitation12%
Record high73° (2024)
Record low19° (2017)
Thu, 2951° / 36°0.07
51 °
Marvin, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.07 in
Chance of precipitation28%
Record high67° (2007)
Record low17° (2020)
Fri, 3050° / 36°0.08
50 °
Marvin, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.08 in
Chance of precipitation28%
Record high68° (1965)
Record low18° (1991)
Sat, 3149° / 35°0.09
49 °
Marvin, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.09 in
Chance of precipitation23%
Record high72° (1990)
Record low20° (1996)
Sun, 0148° / 35°0.07
48 °
Marvin, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation18%
Record high71° (1990)
Record low14° (1984)
Mon, 0248° / 34°0.05
48 °
Marvin, Monday, 2 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.05 in
Chance of precipitation20%
Record high74° (1978)
Record low11° (1991)
Tue, 0347° / 34°0.05
47 °
Marvin, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.05 in
Chance of precipitation22%
Record high72° (1978)
Record low8° (1991)
Wed, 0447° / 33°0.03
47 °
Marvin, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.03 in
Chance of precipitation12%
Record high71° (2015)
Record low1° (1991)
Thu, 0548° / 33°0.03
48 °
Marvin, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.03 in
Chance of precipitation17%
Record high71° (2016)
Record low13° (2003)
Fri, 0647° / 33°0.04
47 °
Marvin, Friday, 6 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.04 in
Chance of precipitation15%
Record high73° (2020)
Record low6° (1991)
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 Marvin, 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 Marvin, 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.