Monthly outlook for Folsom, SD: average high 63.6°, average low 43.7°. That is 4.2° above the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 23 October (84.6°), the coolest 27 October (32.6°).
63.6°/43.7°
Average high / low
+4.2°
Above normal
2 / 3
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
61.9°
58.2°
+2°
30 October – 8 November
66.5°
52.3°
+7.9°
9 November – 18 November
at normal
47.5°
—
October records over 66 years
92.7°3 October 2025All-time high
-0.6°30 October 1991All-time low
Wed, 2170° / 43°0
70 °
Folsom, Wednesday, 21 October
Clear. High 70°, low 43°.
Pressure30.21 inHg
Wind2.5 mph E
Humidity50%
Visibility6.2 mi
Dew point44°
Thu, 2282° / 47°0
82 °
Folsom, Thursday, 22 October
Mostly clear. High 82°, low 47°.
Pressure29.91 inHg
Wind11.9 mph S
Humidity43%
Visibility6.2 mi
Dew point51°
Fri, 2385° / 58°0
85 °
Folsom, Friday, 23 October
Partly cloudy. High 85°, low 58°.
Pressure29.65 inHg
Wind12.7 mph S
Humidity46%
Visibility6.2 mi
Dew point54°
Sat, 2459° / 45°0.32
59 °
Folsom, Saturday, 24 October
Rain. High 59°, low 45°.
Pressure30.33 inHg
Wind20.9 mph N
Humidity60%
Visibility6.2 mi
Dew point34°
Sun, 2546° / 40°0.05
46 °
Folsom, Sunday, 25 October
Light rain. High 46°, low 40°.
Pressure30.45 inHg
Wind6.1 mph SE
Humidity57%
Visibility—
Dew point31°
Mon, 2644° / 38°0.04
44 °
Folsom, Monday, 26 October
Light rain. High 44°, low 38°.
Pressure30.56 inHg
Wind10.5 mph N
Humidity60%
Visibility—
Dew point31°
Tue, 2750° / 33°0
50 °
Folsom, Tuesday, 27 October
Mostly clear. High 50°, low 33°.
Pressure30.33 inHg
Wind16.3 mph S
Humidity56%
Visibility—
Dew point30°
Wed, 2853° / 40°0
53 °
Folsom, Wednesday, 28 October
Mostly clear. High 53°, low 40°.
Pressure30.33 inHg
Wind16.5 mph N
Humidity26%
Visibility—
Dew point15°
Thu, 2954° / 39°0
54 °
Folsom, Thursday, 29 October
Overcast. High 54°, low 39°.
Pressure30.18 inHg
Wind6.5 mph E
Humidity25%
Visibility—
Dew point15°
Fri, 3070° / 40°0
70 °
Folsom, Friday, 30 October
Clear. High 70°, low 40°.
Pressure29.59 inHg
Wind10 mph SW
Humidity25%
Visibility—
Dew point25°
Sat, 3155° / 41°0
55 °
Folsom, Saturday, 31 October
Mostly clear. High 55°, low 41°.
Pressure29.71 inHg
Wind24.1 mph N
Humidity31%
Visibility—
Dew point20°
Sun, 0163° / 42°0
63 °
Folsom, Sunday, 1 November
Partly cloudy. High 63°, low 42°.
Pressure29.85 inHg
Wind9.4 mph NE
Humidity22%
Visibility—
Dew point19°
Mon, 0257° / 45°0
57 °
Folsom, Monday, 2 November
Overcast. High 57°, low 45°.
Pressure30.21 inHg
Wind8.9 mph E
Humidity31%
Visibility—
Dew point23°
Tue, 0380° / 46°0
80 °
Folsom, Tuesday, 3 November
Partly cloudy. High 80°, low 46°.
Pressure29.97 inHg
Wind20.5 mph N
Humidity21%
Visibility—
Dew point25°
Wed, 0474° / 55°0
74 °
Folsom, Wednesday, 4 November
Clear. High 74°, low 55°.
Pressure30.03 inHg
Wind8.2 mph S
Humidity31%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0553° / 33°0.03
53 °
Folsom, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low33°
Average precipitation0.03 in
Chance of precipitation15%
Record high74° (2020)
Record low5° (1973)
Fri, 0652° / 31°0.04
52 °
Folsom, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low31°
Average precipitation0.04 in
Chance of precipitation13%
Record high75° (2020)
Record low-5° (2003)
Sat, 0752° / 31°0.02
52 °
Folsom, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low31°
Average precipitation0.02 in
Chance of precipitation13%
Record high75° (1999)
Record low-1° (1991)
Sun, 0850° / 31°0.05
50 °
Folsom, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.05 in
Chance of precipitation18%
Record high79° (1999)
Record low7° (2003)
Mon, 0947° / 29°0.05
47 °
Folsom, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.05 in
Chance of precipitation20%
Record high74° (2016)
Record low2° (1966)
Tue, 1047° / 27°0.03
47 °
Folsom, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high47°
Average low27°
Average precipitation0.03 in
Chance of precipitation18%
Record high69° (2007)
Record low-10° (1986)
Wed, 1145° / 27°0.02
45 °
Folsom, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.02 in
Chance of precipitation17%
Record high72° (2005)
Record low-12° (1986)
Thu, 1248° / 27°0.03
48 °
Folsom, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low27°
Average precipitation0.03 in
Chance of precipitation13%
Record high73° (1999)
Record low-7° (1986)
Fri, 1349° / 29°0.03
49 °
Folsom, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low29°
Average precipitation0.03 in
Chance of precipitation18%
Record high72° (1999)
Record low-18° (1986)
Sat, 1448° / 29°0.02
48 °
Folsom, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.02 in
Chance of precipitation13%
Record high75° (2025)
Record low3° (2000)
Sun, 1548° / 28°0.02
48 °
Folsom, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high48°
Average low28°
Average precipitation0.02 in
Chance of precipitation12%
Record high72° (2021)
Record low8° (2014)
Mon, 1649° / 28°0.02
49 °
Folsom, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low28°
Average precipitation0.02 in
Chance of precipitation8%
Record high70° (2001)
Record low-8° (2014)
Tue, 1747° / 28°0.02
47 °
Folsom, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.02 in
Chance of precipitation15%
Record high67° (2001)
Record low5° (2000)
Wed, 1847° / 27°0.03
47 °
Folsom, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high47°
Average low27°
Average precipitation0.03 in
Chance of precipitation18%
Record high72° (2008)
Record low2° (2014)
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 Folsom, 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 Folsom, 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.