Monthly outlook for Neptune, IA: average high 55.9°, average low 42.7°. That is 1.3° below the climate normal for October. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 20 October (67.5°), the coolest 30 October (28.1°).
55.9°/42.7°
Average high / low
−1.3°
Below normal
3 / 4
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
60.6°
59.5°
+0.6°
25 October – 3 November
48.2°
54.5°
-3.5°
4 November – 13 November
at normal
48.6°
—
October records over 66 years
88.9°3 October 2025All-time high
16.5°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Kingsley (11 mi).
Fri, 1651° / 38°0
51 °
Neptune, Friday, 16 October
Clear. High 51°, low 38°.
Pressure30.56 inHg
Wind18.2 mph N
Humidity55%
Visibility6.2 mi
Dew point30°
Sat, 1758° / 34°0
58 °
Neptune, Saturday, 17 October
Clear. High 58°, low 34°.
Pressure30.45 inHg
Wind14 mph S
Humidity46%
Visibility6.2 mi
Dew point31°
Sun, 1863° / 43°0
63 °
Neptune, Sunday, 18 October
Clear. High 63°, low 43°.
Pressure30.21 inHg
Wind13.4 mph S
Humidity54%
Visibility6.2 mi
Dew point39°
Mon, 1963° / 45°0
63 °
Neptune, Monday, 19 October
Partly cloudy. High 63°, low 45°.
Pressure30.21 inHg
Wind10.5 mph S
Humidity61%
Visibility—
Dew point44°
Tue, 2068° / 48°0
68 °
Neptune, Tuesday, 20 October
Clear. High 68°, low 48°.
Pressure30.15 inHg
Wind11.5 mph SE
Humidity56%
Visibility—
Dew point46°
Wed, 2164° / 53°0.02
64 °
Neptune, Wednesday, 21 October
Light rain. High 64°, low 53°.
Pressure30.15 inHg
Wind16.3 mph S
Humidity61%
Visibility—
Dew point47°
Thu, 2266° / 59°0.31
66 °
Neptune, Thursday, 22 October
Light rain. High 66°, low 59°.
Pressure29.97 inHg
Wind18.8 mph S
Humidity69%
Visibility—
Dew point55°
Fri, 2362° / 57°0.82
62 °
Neptune, Friday, 23 October
Rain. High 62°, low 57°.
Pressure29.71 inHg
Wind28.9 mph S
Humidity71%
Visibility—
Dew point49°
Sat, 2456° / 44°0
56 °
Neptune, Saturday, 24 October
Overcast. High 56°, low 44°.
Pressure30.09 inHg
Wind22.8 mph S
Humidity63%
Visibility—
Dew point36°
Sun, 2549° / 39°0
49 °
Neptune, Sunday, 25 October
Mostly clear. High 49°, low 39°.
Pressure30.27 inHg
Wind16.5 mph NW
Humidity39%
Visibility—
Dew point23°
Mon, 2646° / 36°0
46 °
Neptune, Monday, 26 October
Overcast. High 46°, low 36°.
Pressure30.39 inHg
Wind7.6 mph NW
Humidity42%
Visibility—
Dew point22°
Tue, 2749° / 32°0
49 °
Neptune, Tuesday, 27 October
Clear. High 49°, low 32°.
Pressure30.30 inHg
Wind8 mph SW
Humidity42%
Visibility—
Dew point23°
Wed, 2851° / 40°0
51 °
Neptune, Wednesday, 28 October
Overcast. High 51°, low 40°.
Pressure30.03 inHg
Wind7.3 mph NW
Humidity61%
Visibility—
Dew point37°
Thu, 2954° / 40°0
54 °
Neptune, Thursday, 29 October
Overcast. High 54°, low 40°.
Pressure30.15 inHg
Wind14 mph N
Humidity64%
Visibility—
Dew point39°
Fri, 3039° / 28°0
39 °
Neptune, Friday, 30 October
Clear. High 39°, low 28°.
Pressure30.68 inHg
Wind15.3 mph N
Humidity38%
Visibility—
Dew point12°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3153° / 37°0.09
53 °
Neptune, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.09 in
Chance of precipitation27%
Record high74° (1968)
Record low18° (1993)
Sun, 0152° / 37°0.08
52 °
Neptune, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.08 in
Chance of precipitation25%
Record high74° (1990)
Record low19° (2002)
Mon, 0252° / 36°0.04
52 °
Neptune, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.04 in
Chance of precipitation17%
Record high73° (2022)
Record low10° (1991)
Tue, 0352° / 36°0.06
52 °
Neptune, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.06 in
Chance of precipitation18%
Record high74° (2022)
Record low1° (1991)
Wed, 0451° / 35°0.01
51 °
Neptune, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.01 in
Chance of precipitation13%
Record high71° (1975)
Record low-14° (1991)
Thu, 0551° / 35°0.05
51 °
Neptune, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.05 in
Chance of precipitation20%
Record high72° (2008)
Record low14° (1991)
Fri, 0651° / 35°0.03
51 °
Neptune, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.03 in
Chance of precipitation10%
Record high71° (2020)
Record low7° (1991)
Sat, 0751° / 34°0.02
51 °
Neptune, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.02 in
Chance of precipitation10%
Record high73° (2001)
Record low-11° (1991)
Sun, 0851° / 34°0.05
51 °
Neptune, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.05 in
Chance of precipitation18%
Record high78° (1999)
Record low-5° (1991)
Mon, 0949° / 34°0.15
49 °
Neptune, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.15 in
Chance of precipitation28%
Record high73° (1999)
Record low15° (2018)
Tue, 1046° / 31°0.08
46 °
Neptune, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.08 in
Chance of precipitation27%
Record high72° (2012)
Record low11° (2018)
Wed, 1145° / 29°0.07
45 °
Neptune, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.07 in
Chance of precipitation17%
Record high67° (1964)
Record low4° (1986)
Thu, 1244° / 29°0.05
44 °
Neptune, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.05 in
Chance of precipitation22%
Record high67° (1999)
Record low6° (2019)
Fri, 1346° / 30°0.04
46 °
Neptune, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.04 in
Chance of precipitation22%
Record high73° (1999)
Record low3° (1986)
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 Neptune, 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 Neptune, 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.