Monthly outlook for Lyman, SD: average high 56.6°, average low 42.8°. That is 0.7° below the climate normal for October. Precipitation is expected on 5 days (about 2.3 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 17 October (70.3°), the coolest 27 October (31.6°).
56.6°/42.8°
Average high / low
−0.7°
Below normal
5 / 3
Wet days / normal
2.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
62.7°
59.6°
+1.8°
26 October – 4 November
46.4°
53.7°
-4.1°
5 November – 14 November
at normal
48.1°
—
October records over 66 years
92.8°4 October 1975All-time high
2.5°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Kennebec (6 mi).
Sat, 1770° / 41°0
70 °
Lyman, Saturday, 17 October
Clear. High 70°, low 41°.
Pressure30.18 inHg
Wind14.2 mph S
Humidity37%
Visibility6.2 mi
Dew point33°
Sun, 1867° / 46°0
67 °
Lyman, Sunday, 18 October
Clear. High 67°, low 46°.
Pressure30.00 inHg
Wind2.5 mph SW
Humidity47%
Visibility6.2 mi
Dew point41°
Mon, 1963° / 43°0
63 °
Lyman, Monday, 19 October
Clear. High 63°, low 43°.
Pressure30.12 inHg
Wind5.8 mph E
Humidity68%
Visibility6.2 mi
Dew point46°
Tue, 2067° / 50°0
67 °
Lyman, Tuesday, 20 October
Clear. High 67°, low 50°.
Pressure30.06 inHg
Wind14.4 mph SE
Humidity62%
Visibility—
Dew point48°
Wed, 2169° / 52°0
69 °
Lyman, Wednesday, 21 October
Clear. High 69°, low 52°.
Pressure30.06 inHg
Wind10.6 mph S
Humidity67%
Visibility—
Dew point52°
Thu, 2269° / 49°0
69 °
Lyman, Thursday, 22 October
Clear. High 69°, low 49°.
Pressure30.18 inHg
Wind10.6 mph E
Humidity32%
Visibility—
Dew point31°
Fri, 2367° / 52°0.41
67 °
Lyman, Friday, 23 October
Rain. High 67°, low 52°.
Pressure29.85 inHg
Wind20.5 mph S
Humidity90%
Visibility—
Dew point55°
Sat, 2458° / 47°0
58 °
Lyman, Saturday, 24 October
Clear. High 58°, low 47°.
Pressure30.15 inHg
Wind19.5 mph NW
Humidity52%
Visibility—
Dew point36°
Sun, 2546° / 34°0.56
46 °
Lyman, Sunday, 25 October
Snow. High 46°, low 34°.
Pressure30.33 inHg
Wind14.5 mph NE
Humidity71%
Visibility—
Dew point32°
Mon, 2643° / 33°0.43
43 °
Lyman, Monday, 26 October
Snow. High 43°, low 33°.
Pressure30.30 inHg
Wind13.7 mph N
Humidity77%
Visibility—
Dew point32°
Tue, 2744° / 32°0
44 °
Lyman, Tuesday, 27 October
Partly cloudy. High 44°, low 32°.
Pressure30.12 inHg
Wind14.4 mph SE
Humidity74%
Visibility—
Dew point33°
Wed, 2846° / 42°0.52
46 °
Lyman, Wednesday, 28 October
Rain. High 46°, low 42°.
Pressure29.77 inHg
Wind11.5 mph SE
Humidity97%
Visibility—
Dew point43°
Thu, 2949° / 44°0.02
49 °
Lyman, Thursday, 29 October
Light rain. High 49°, low 44°.
Pressure29.94 inHg
Wind11.7 mph NW
Humidity87%
Visibility—
Dew point43°
Fri, 3052° / 39°0
52 °
Lyman, Friday, 30 October
Overcast. High 52°, low 39°.
Pressure30.27 inHg
Wind9.4 mph NE
Humidity55%
Visibility—
Dew point33°
Sat, 3145° / 41°0.39
45 °
Lyman, Saturday, 31 October
Rain. High 45°, low 41°.
Pressure30.21 inHg
Wind16.9 mph NE
Humidity85%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0151° / 36°0.03
51 °
Lyman, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.03 in
Chance of precipitation18%
Record high77° (1990)
Record low12° (2002)
Mon, 0252° / 35°0.02
52 °
Lyman, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low35°
Average precipitation0.02 in
Chance of precipitation15%
Record high75° (1964)
Record low8° (1991)
Tue, 0351° / 35°0.03
51 °
Lyman, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.03 in
Chance of precipitation17%
Record high73° (2020)
Record low6° (1991)
Wed, 0452° / 33°0.01
52 °
Lyman, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.01 in
Chance of precipitation10%
Record high76° (1978)
Record low4° (1995)
Thu, 0552° / 34°0.03
52 °
Lyman, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low34°
Average precipitation0.03 in
Chance of precipitation17%
Record high77° (2001)
Record low15° (2003)
Fri, 0651° / 33°0.03
51 °
Lyman, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.03 in
Chance of precipitation17%
Record high78° (2020)
Record low2° (2003)
Sat, 0751° / 33°0.03
51 °
Lyman, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.03 in
Chance of precipitation12%
Record high72° (2006)
Record low2° (1991)
Sun, 0850° / 33°0.07
50 °
Lyman, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.07 in
Chance of precipitation15%
Record high80° (1999)
Record low9° (1991)
Mon, 0947° / 32°0.05
47 °
Lyman, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.05 in
Chance of precipitation20%
Record high70° (2016)
Record low7° (2000)
Tue, 1046° / 28°0.04
46 °
Lyman, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.04 in
Chance of precipitation23%
Record high70° (1989)
Record low-2° (1986)
Wed, 1144° / 29°0.02
44 °
Lyman, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.02 in
Chance of precipitation15%
Record high69° (2005)
Record low-5° (1986)
Thu, 1246° / 28°0.05
46 °
Lyman, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.05 in
Chance of precipitation13%
Record high71° (1999)
Record low-3° (1986)
Fri, 1348° / 29°0.03
48 °
Lyman, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high71° (1981)
Record low-14° (1986)
Sat, 1446° / 30°0.02
46 °
Lyman, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.02 in
Chance of precipitation15%
Record high74° (2025)
Record low6° (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 Lyman, 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 Lyman, 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.