Monthly outlook for Lyman, IA: average high 64.9°, average low 50.3°. That is 1.5° above the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 10 October (86.3°), the coolest 18 October (33.5°).
64.9°/50.3°
Average high / low
+1.5°
Above normal
1 / 4
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
68.3°
63°
+3°
20 October – 29 October
59.1°
59.4°
-0.2°
30 October – 8 November
at normal
53.9°
—
October records over 66 years
92.5°5 October 2024All-time high
13.6°27 October 1997All-time low
Climate normals and records are computed from the nearest reference point — Lewis (7 mi).
Sun, 1184° / 63°0
84 °
Lyman, Sunday, 11 October
Mostly clear. High 84°, low 63°.
Pressure29.80 inHg
Wind12.3 mph S
Humidity53%
Visibility6.2 mi
Dew point59°
Mon, 1286° / 69°0
86 °
Lyman, Monday, 12 October
Clear. High 86°, low 69°.
Pressure29.71 inHg
Wind13 mph S
Humidity54%
Visibility6.2 mi
Dew point63°
Tue, 1372° / 60°0
72 °
Lyman, Tuesday, 13 October
Overcast. High 72°, low 60°.
Pressure29.94 inHg
Wind7.1 mph NE
Humidity71%
Visibility6.2 mi
Dew point58°
Wed, 1468° / 59°0.02
68 °
Lyman, Wednesday, 14 October
Light rain. High 68°, low 59°.
Pressure30.15 inHg
Wind12 mph NE
Humidity63%
Visibility—
Dew point54°
Thu, 1566° / 55°0.03
66 °
Lyman, Thursday, 15 October
Light rain. High 66°, low 55°.
Pressure30.18 inHg
Wind15.7 mph NW
Humidity88%
Visibility—
Dew point56°
Fri, 1656° / 40°0
56 °
Lyman, Friday, 16 October
Mostly clear. High 56°, low 40°.
Pressure30.06 inHg
Wind26.5 mph W
Humidity48%
Visibility—
Dew point33°
Sat, 1745° / 37°0
45 °
Lyman, Saturday, 17 October
Overcast. High 45°, low 37°.
Pressure30.56 inHg
Wind22.6 mph NW
Humidity49%
Visibility—
Dew point25°
Sun, 1857° / 33°0
57 °
Lyman, Sunday, 18 October
Mostly clear. High 57°, low 33°.
Pressure30.21 inHg
Wind21.5 mph S
Humidity42%
Visibility—
Dew point28°
Mon, 1962° / 42°0
62 °
Lyman, Monday, 19 October
Overcast. High 62°, low 42°.
Pressure30.18 inHg
Wind13.5 mph S
Humidity45%
Visibility—
Dew point36°
Tue, 2063° / 50°0.03
63 °
Lyman, Tuesday, 20 October
Light rain. High 63°, low 50°.
Pressure30.03 inHg
Wind16.9 mph S
Humidity53%
Visibility—
Dew point38°
Wed, 2158° / 52°0.19
58 °
Lyman, Wednesday, 21 October
Light rain. High 58°, low 52°.
Pressure29.80 inHg
Wind15.9 mph S
Humidity90%
Visibility—
Dew point55°
Thu, 2262° / 49°0
62 °
Lyman, Thursday, 22 October
Overcast. High 62°, low 49°.
Pressure29.94 inHg
Wind20.3 mph N
Humidity57%
Visibility—
Dew point44°
Fri, 2366° / 45°0
66 °
Lyman, Friday, 23 October
Partly cloudy. High 66°, low 45°.
Pressure29.85 inHg
Wind22.2 mph NW
Humidity49%
Visibility—
Dew point41°
Sat, 2456° / 42°0
56 °
Lyman, Saturday, 24 October
Clear. High 56°, low 42°.
Pressure30.15 inHg
Wind16.6 mph NW
Humidity46%
Visibility—
Dew point31°
Sun, 2550° / 44°0.02
50 °
Lyman, Sunday, 25 October
Light rain. High 50°, low 44°.
Pressure29.97 inHg
Wind6.8 mph NE
Humidity78%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2659° / 42°0.08
59 °
Lyman, Monday, 26 October
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.08 in
Chance of precipitation28%
Record high76° (1989)
Record low23° (2020)
Tue, 2758° / 41°0.06
58 °
Lyman, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.06 in
Chance of precipitation17%
Record high82° (1999)
Record low14° (1997)
Wed, 2857° / 40°0.07
57 °
Lyman, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high57°
Average low40°
Average precipitation0.07 in
Chance of precipitation17%
Record high79° (2016)
Record low23° (1967)
Thu, 2958° / 41°0.09
58 °
Lyman, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.09 in
Chance of precipitation23%
Record high81° (2024)
Record low19° (1980)
Fri, 3057° / 41°0.12
57 °
Lyman, Friday, 30 October
Climate normal for this date — 60-year average.
Average high57°
Average low41°
Average precipitation0.12 in
Chance of precipitation30%
Record high76° (2024)
Record low22° (1991)
Sat, 3155° / 40°0.11
55 °
Lyman, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.11 in
Chance of precipitation30%
Record high76° (1968)
Record low19° (1993)
Sun, 0155° / 39°0.16
55 °
Lyman, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.16 in
Chance of precipitation32%
Record high76° (1990)
Record low21° (1991)
Mon, 0253° / 38°0.08
53 °
Lyman, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.08 in
Chance of precipitation23%
Record high74° (1964)
Record low9° (1991)
Tue, 0354° / 38°0.09
54 °
Lyman, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.09 in
Chance of precipitation22%
Record high76° (2022)
Record low6° (1991)
Wed, 0453° / 37°0.07
53 °
Lyman, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.07 in
Chance of precipitation15%
Record high70° (1978)
Record low1° (1991)
Thu, 0553° / 37°0.05
53 °
Lyman, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.05 in
Chance of precipitation22%
Record high72° (2015)
Record low19° (1967)
Fri, 0653° / 37°0.06
53 °
Lyman, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.06 in
Chance of precipitation17%
Record high73° (1980)
Record low13° (1991)
Sat, 0753° / 36°0.02
53 °
Lyman, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.02 in
Chance of precipitation12%
Record high71° (2001)
Record low-3° (1991)
Sun, 0853° / 36°0.04
53 °
Lyman, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.04 in
Chance of precipitation18%
Record high77° (1999)
Record low-2° (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 Lyman, IA 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, IA 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.