Monthly outlook for Lyon, MO: average high 72.2°, average low 53.9°. That is 3.3° above the climate normal for October. Precipitation is expected on 6 days (about 1.0 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 13 October (92.6°), the coolest 18 October (34.5°).
72.2°/53.9°
Average high / low
+3.3°
Above normal
6 / 5
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
76.3°
67.1°
+5.1°
21 October – 30 October
65.4°
63.6°
+1°
31 October – 9 November
at normal
59.1°
—
October records over 66 years
92.1°10 October 1963All-time high
27.3°24 October 1981All-time low
Climate normals and records are computed from the nearest reference point — New Haven (7 mi).
Mon, 1290° / 62°0
90 °
Lyon, Monday, 12 October
Clear. High 90°, low 62°.
Pressure29.91 inHg
Wind11.9 mph SW
Humidity42%
Visibility6.2 mi
Dew point60°
Tue, 1393° / 63°0
93 °
Lyon, Tuesday, 13 October
Clear. High 93°, low 63°.
Pressure29.91 inHg
Wind8.4 mph SW
Humidity51%
Visibility6.2 mi
Dew point67°
Wed, 1480° / 71°0.23
80 °
Lyon, Wednesday, 14 October
Rain. High 80°, low 71°.
Pressure30.00 inHg
Wind5.5 mph SW
Humidity88%
Visibility6.2 mi
Dew point72°
Thu, 1580° / 71°0.46
80 °
Lyon, Thursday, 15 October
Rain. High 80°, low 71°.
Pressure29.97 inHg
Wind9.1 mph SW
Humidity89%
Visibility3.0 mi
Dew point73°
Fri, 1672° / 54°0.04
72 °
Lyon, Friday, 16 October
Light rain. High 72°, low 54°.
Pressure30.45 inHg
Wind15.6 mph N
Humidity49%
Visibility—
Dew point42°
Sat, 1755° / 39°0
55 °
Lyon, Saturday, 17 October
Clear. High 55°, low 39°.
Pressure30.62 inHg
Wind8.1 mph NE
Humidity30%
Visibility—
Dew point22°
Sun, 1865° / 35°0
65 °
Lyon, Sunday, 18 October
Clear. High 65°, low 35°.
Pressure30.47 inHg
Wind9.9 mph S
Humidity22%
Visibility—
Dew point19°
Mon, 1971° / 43°0
71 °
Lyon, Monday, 19 October
Clear. High 71°, low 43°.
Pressure30.39 inHg
Wind9.2 mph S
Humidity21%
Visibility—
Dew point25°
Tue, 2069° / 51°0
69 °
Lyon, Tuesday, 20 October
Overcast. High 69°, low 51°.
Pressure30.27 inHg
Wind9.6 mph S
Humidity50%
Visibility—
Dew point47°
Wed, 2168° / 58°0.06
68 °
Lyon, Wednesday, 21 October
Light rain. High 68°, low 58°.
Pressure30.18 inHg
Wind9.8 mph S
Humidity62%
Visibility—
Dew point53°
Thu, 2270° / 61°0.09
70 °
Lyon, Thursday, 22 October
Light rain. High 70°, low 61°.
Pressure30.21 inHg
Wind10.9 mph S
Humidity86%
Visibility—
Dew point61°
Fri, 2376° / 67°0.02
76 °
Lyon, Friday, 23 October
Light rain. High 76°, low 67°.
Pressure30.09 inHg
Wind12.1 mph S
Humidity63%
Visibility—
Dew point56°
Sat, 2467° / 48°0.13
67 °
Lyon, Saturday, 24 October
Light rain. High 67°, low 48°.
Pressure30.15 inHg
Wind11.4 mph SW
Humidity87%
Visibility—
Dew point50°
Sun, 2553° / 43°0
53 °
Lyon, Sunday, 25 October
Overcast. High 53°, low 43°.
Pressure30.21 inHg
Wind8.4 mph N
Humidity53%
Visibility—
Dew point32°
Mon, 2659° / 43°0
59 °
Lyon, Monday, 26 October
Overcast. High 59°, low 43°.
Pressure30.06 inHg
Wind13.2 mph NW
Humidity40%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2762° / 46°0.11
62 °
Lyon, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high62°
Average low46°
Average precipitation0.11 in
Chance of precipitation30%
Record high81° (2023)
Record low31° (2001)
Wed, 2862° / 45°0.05
62 °
Lyon, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high62°
Average low45°
Average precipitation0.05 in
Chance of precipitation27%
Record high79° (2024)
Record low30° (1969)
Thu, 2962° / 45°0.13
62 °
Lyon, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high62°
Average low45°
Average precipitation0.13 in
Chance of precipitation27%
Record high82° (2024)
Record low29° (2017)
Fri, 3063° / 46°0.13
63 °
Lyon, Friday, 30 October
Climate normal for this date — 60-year average.
Average high63°
Average low46°
Average precipitation0.13 in
Chance of precipitation35%
Record high81° (2024)
Record low28° (1980)
Sat, 3162° / 47°0.15
62 °
Lyon, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high62°
Average low47°
Average precipitation0.15 in
Chance of precipitation42%
Record high80° (1968)
Record low28° (1993)
Sun, 0161° / 46°0.17
61 °
Lyon, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high61°
Average low46°
Average precipitation0.17 in
Chance of precipitation28%
Record high80° (2016)
Record low25° (2023)
Mon, 0260° / 44°0.09
60 °
Lyon, Monday, 2 November
Climate normal for this date — 60-year average.
Average high60°
Average low44°
Average precipitation0.09 in
Chance of precipitation28%
Record high80° (2016)
Record low26° (1991)
Tue, 0359° / 43°0.13
59 °
Lyon, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.13 in
Chance of precipitation30%
Record high78° (1987)
Record low18° (1991)
Wed, 0458° / 44°0.16
58 °
Lyon, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high58°
Average low44°
Average precipitation0.16 in
Chance of precipitation27%
Record high79° (1978)
Record low18° (1991)
Thu, 0558° / 42°0.19
58 °
Lyon, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high58°
Average low42°
Average precipitation0.19 in
Chance of precipitation33%
Record high79° (1978)
Record low24° (1991)
Fri, 0658° / 41°0.09
58 °
Lyon, Friday, 6 November
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.09 in
Chance of precipitation27%
Record high77° (2023)
Record low26° (1982)
Sat, 0758° / 42°0.08
58 °
Lyon, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high58°
Average low42°
Average precipitation0.08 in
Chance of precipitation15%
Record high75° (1999)
Record low16° (1991)
Sun, 0858° / 41°0.04
58 °
Lyon, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.04 in
Chance of precipitation18%
Record high81° (2023)
Record low-5° (1991)
Mon, 0959° / 42°0.11
59 °
Lyon, Monday, 9 November
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.11 in
Chance of precipitation28%
Record high79° (2022)
Record low7° (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 Lyon, MO 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 Lyon, MO 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.