Monthly outlook for Merritt, SD: average high 56.2°, average low 36.3°. That is 1.5° above the climate normal for October. Precipitation is expected on 0 days (about 0.1 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 22 October (72.4°), the coolest 30 October (24.2°).
56.2°/36.3°
Average high / low
+1.5°
Above normal
0 / 3
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
61.8°
55.9°
+3.3°
29 October – 7 November
47°
49.7°
-1.5°
8 November – 17 November
at normal
45.4°
—
October records over 66 years
89.2°3 October 2025All-time high
-6.2°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Blackhawk (12 mi).
Tue, 2070° / 39°0
70 °
Merritt, Tuesday, 20 October
Clear. High 70°, low 39°.
Pressure29.94 inHg
Wind1.9 mph E
Humidity28%
Visibility6.2 mi
Dew point35°
Wed, 2163° / 41°0
63 °
Merritt, Wednesday, 21 October
Clear. High 63°, low 41°.
Pressure30.18 inHg
Wind7.1 mph SE
Humidity52%
Visibility6.2 mi
Dew point43°
Thu, 2272° / 51°0
72 °
Merritt, Thursday, 22 October
Partly cloudy. High 72°, low 51°.
Pressure29.94 inHg
Wind2.9 mph S
Humidity31%
Visibility6.2 mi
Dew point41°
Fri, 2372° / 55°0
72 °
Merritt, Friday, 23 October
Overcast. High 72°, low 55°.
Pressure29.62 inHg
Wind13.6 mph SW
Humidity29%
Visibility—
Dew point36°
Sat, 2453° / 31°0
53 °
Merritt, Saturday, 24 October
Light rain. High 53°, low 31°.
Pressure30.03 inHg
Wind10.9 mph NW
Humidity60%
Visibility—
Dew point34°
Sun, 2554° / 29°0
54 °
Merritt, Sunday, 25 October
Partly cloudy. High 54°, low 29°.
Pressure30.06 inHg
Wind5.7 mph SE
Humidity23%
Visibility—
Dew point13°
Mon, 2650° / 30°0
50 °
Merritt, Monday, 26 October
Clear. High 50°, low 30°.
Pressure30.06 inHg
Wind6.4 mph NW
Humidity36%
Visibility—
Dew point20°
Tue, 2758° / 30°0
58 °
Merritt, Tuesday, 27 October
Clear. High 58°, low 30°.
Pressure29.83 inHg
Wind11.7 mph S
Humidity26%
Visibility—
Dew point20°
Wed, 2868° / 47°0
68 °
Merritt, Wednesday, 28 October
Mostly clear. High 68°, low 47°.
Pressure29.62 inHg
Wind11.7 mph SW
Humidity17%
Visibility—
Dew point20°
Thu, 2961° / 33°0.02
61 °
Merritt, Thursday, 29 October
Light rain. High 61°, low 33°.
Pressure29.21 inHg
Wind17.9 mph SW
Humidity29%
Visibility—
Dew point27°
Fri, 3034° / 24°0.04
34 °
Merritt, Friday, 30 October
Light snow. High 34°, low 24°.
Pressure29.74 inHg
Wind31.9 mph W
Humidity56%
Visibility—
Dew point16°
Sat, 3142° / 25°0
42 °
Merritt, Saturday, 31 October
Overcast. High 42°, low 25°.
Pressure29.94 inHg
Wind11.4 mph W
Humidity29%
Visibility—
Dew point10°
Sun, 0144° / 33°0.02
44 °
Merritt, Sunday, 1 November
Snow. High 44°, low 33°.
Pressure29.88 inHg
Wind16 mph NW
Humidity56%
Visibility—
Dew point25°
Mon, 0253° / 38°0
53 °
Merritt, Monday, 2 November
Overcast. High 53°, low 38°.
Pressure29.56 inHg
Wind24.3 mph SW
Humidity30%
Visibility—
Dew point20°
Tue, 0347° / 37°0
47 °
Merritt, Tuesday, 3 November
Overcast. High 47°, low 37°.
Pressure29.44 inHg
Wind4.8 mph NW
Humidity48%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0451° / 31°0.01
51 °
Merritt, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low31°
Average precipitation0.01 in
Chance of precipitation8%
Record high73° (1978)
Record low8° (1995)
Thu, 0550° / 31°0.03
50 °
Merritt, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.03 in
Chance of precipitation17%
Record high77° (2020)
Record low2° (2003)
Fri, 0649° / 30°0.05
49 °
Merritt, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.05 in
Chance of precipitation13%
Record high74° (2020)
Record low1° (2003)
Sat, 0749° / 30°0.04
49 °
Merritt, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.04 in
Chance of precipitation13%
Record high76° (2020)
Record low5° (1991)
Sun, 0847° / 29°0.07
47 °
Merritt, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.07 in
Chance of precipitation18%
Record high76° (1999)
Record low3° (2003)
Mon, 0944° / 28°0.07
44 °
Merritt, Monday, 9 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.07 in
Chance of precipitation23%
Record high69° (2001)
Record low0° (1966)
Tue, 1045° / 26°0.04
45 °
Merritt, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.04 in
Chance of precipitation18%
Record high67° (2005)
Record low-5° (1986)
Wed, 1143° / 26°0.02
43 °
Merritt, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.02 in
Chance of precipitation17%
Record high68° (2005)
Record low-4° (1986)
Thu, 1246° / 27°0.02
46 °
Merritt, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low27°
Average precipitation0.02 in
Chance of precipitation18%
Record high72° (1999)
Record low-11° (1986)
Fri, 1346° / 28°0.04
46 °
Merritt, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.04 in
Chance of precipitation20%
Record high71° (1999)
Record low-14° (1986)
Sat, 1446° / 29°0.02
46 °
Merritt, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.02 in
Chance of precipitation20%
Record high74° (2025)
Record low-4° (2014)
Sun, 1546° / 28°0.02
46 °
Merritt, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.02 in
Chance of precipitation12%
Record high69° (2021)
Record low2° (2014)
Mon, 1647° / 28°0.02
47 °
Merritt, Monday, 16 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.02 in
Chance of precipitation7%
Record high67° (2017)
Record low1° (2000)
Tue, 1744° / 28°0.02
44 °
Merritt, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.02 in
Chance of precipitation17%
Record high65° (1999)
Record low0° (2000)
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 Merritt, 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 Merritt, 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.